[Mlir-commits] [mlir] Reimplementing target description concept using DLTI attribute (PR #92138)

Niranjan Hasabnis llvmlistbot at llvm.org
Mon Jun 17 10:35:43 PDT 2024


https://github.com/nhasabni updated https://github.com/llvm/llvm-project/pull/92138

>From e8e087ce2727181bdbfa6f2d2f27f58e5c81abc6 Mon Sep 17 00:00:00 2001
From: Niranjan Hasabnis <niranjan.hasabnis at intel.com>
Date: Tue, 14 May 2024 07:53:49 -0700
Subject: [PATCH 1/7] Reimplementing target description concept using DLTI
 attribute

---
 mlir/include/mlir/Dialect/DLTI/DLTI.h         | 146 +++++++
 mlir/include/mlir/Dialect/DLTI/DLTIBase.td    |  44 +++
 mlir/include/mlir/Dialect/DLTI/Traits.h       |   7 +
 mlir/include/mlir/IR/BuiltinOps.td            |   1 +
 .../mlir/Interfaces/DataLayoutInterfaces.h    |  65 ++++
 .../mlir/Interfaces/DataLayoutInterfaces.td   | 228 +++++++++++
 .../AMDGPUToROCDL/AMDGPUToROCDL.cpp           |  13 +-
 mlir/lib/Dialect/DLTI/DLTI.cpp                | 367 +++++++++++++++++-
 mlir/lib/Dialect/DLTI/Traits.cpp              |   6 +
 .../Linalg/Transforms/BlockPackMatmul.cpp     |  22 +-
 mlir/lib/IR/BuiltinDialect.cpp                |  11 +
 mlir/lib/Interfaces/DataLayoutInterfaces.cpp  | 185 ++++++++-
 mlir/lib/Transforms/Canonicalizer.cpp         |  51 +++
 .../Interfaces/DataLayoutInterfacesTest.cpp   |  10 +
 14 files changed, 1148 insertions(+), 8 deletions(-)

diff --git a/mlir/include/mlir/Dialect/DLTI/DLTI.h b/mlir/include/mlir/Dialect/DLTI/DLTI.h
index 5ac7c11e6ffee..f78e8bdc5eb98 100644
--- a/mlir/include/mlir/Dialect/DLTI/DLTI.h
+++ b/mlir/include/mlir/Dialect/DLTI/DLTI.h
@@ -21,6 +21,8 @@ namespace mlir {
 namespace impl {
 class DataLayoutEntryStorage;
 class DataLayoutSpecStorage;
+class TargetSystemDescSpecAttrStorage;
+class TargetDeviceDescSpecAttrStorage;
 } // namespace impl
 
 //===----------------------------------------------------------------------===//
@@ -124,6 +126,150 @@ class DataLayoutSpecAttr
   static constexpr StringLiteral name = "builtin.data_layout_spec";
 };
 
+//===----------------------------------------------------------------------===//
+// TargetSystemDescSpecAttr
+//===----------------------------------------------------------------------===//
+
+/// A system description attribute is a list of device descriptors, each
+/// having a unique device ID
+class TargetSystemDescSpecAttr
+    : public Attribute::AttrBase<TargetSystemDescSpecAttr, Attribute,
+                                 impl::TargetSystemDescSpecAttrStorage,
+                                 TargetSystemDescSpecInterface::Trait> {
+public:
+  using Base::Base;
+
+  /// The keyword used for this attribute in custom syntax.
+  constexpr const static StringLiteral kAttrKeyword = "tsd_spec";
+
+  /// Returns a system descriptor attribute from the given system descriptor
+  static TargetSystemDescSpecAttr
+  get(MLIRContext *context, ArrayRef<TargetDeviceDescSpecInterface> entries);
+
+  /// Returns the list of entries.
+  TargetDeviceDescSpecListRef getEntries() const;
+
+  /// Return the device descriptor that matches the given device ID
+  TargetDeviceDescSpecInterface getDeviceDescForDeviceID(uint32_t deviceID);
+
+  /// Returns the specification containing the given list of keys. If the list
+  /// contains duplicate keys or is otherwise invalid, reports errors using the
+  /// given callback and returns null.
+  static TargetSystemDescSpecAttr
+  getChecked(function_ref<InFlightDiagnostic()> emitError, MLIRContext *context,
+             ArrayRef<TargetDeviceDescSpecInterface> entries);
+
+  /// Checks that the given list of entries does not contain duplicate keys.
+  static LogicalResult verify(function_ref<InFlightDiagnostic()> emitError,
+                              ArrayRef<TargetDeviceDescSpecInterface> entries);
+
+  /// Parses an instance of this attribute.
+  static TargetSystemDescSpecAttr parse(AsmParser &parser);
+
+  /// Prints this attribute.
+  void print(AsmPrinter &os) const;
+
+  static constexpr StringLiteral name = "builtin.target_system_description";
+};
+
+//===----------------------------------------------------------------------===//
+// TargetDeviceDescSpecAttr
+//===----------------------------------------------------------------------===//
+
+class TargetDeviceDescSpecAttr
+    : public Attribute::AttrBase<TargetDeviceDescSpecAttr, Attribute,
+                                 impl::TargetDeviceDescSpecAttrStorage,
+                                 TargetDeviceDescSpecInterface::Trait> {
+public:
+  using Base::Base;
+
+  /// The keyword used for this attribute in custom syntax.
+  constexpr const static StringLiteral kAttrKeyword = "tdd_spec";
+
+  /// Returns a system descriptor attribute from the given system descriptor
+  static TargetDeviceDescSpecAttr
+  get(MLIRContext *context, ArrayRef<DataLayoutEntryInterface> entries);
+
+  /// Returns the specification containing the given list of keys. If the list
+  /// contains duplicate keys or is otherwise invalid, reports errors using the
+  /// given callback and returns null.
+  static TargetDeviceDescSpecAttr
+  getChecked(function_ref<InFlightDiagnostic()> emitError, MLIRContext *context,
+             ArrayRef<DataLayoutEntryInterface> entries);
+
+  /// Checks that the given list of entries does not contain duplicate keys.
+  static LogicalResult verify(function_ref<InFlightDiagnostic()> emitError,
+                              ArrayRef<DataLayoutEntryInterface> entries);
+
+  /// Returns the list of entries.
+  DataLayoutEntryListRef getEntries() const;
+
+  /// Parses an instance of this attribute.
+  static TargetDeviceDescSpecAttr parse(AsmParser &parser);
+
+  /// Prints this attribute.
+  void print(AsmPrinter &os) const;
+
+  /// Returns the device ID identifier.
+  StringAttr getDeviceIDIdentifier(MLIRContext *context);
+
+  /// Returns the device type identifier.
+  StringAttr getDeviceTypeIdentifier(MLIRContext *context);
+
+  /// Returns max vector op width identifier.
+  StringAttr getMaxVectorOpWidthIdentifier(MLIRContext *context);
+
+  /// Returns canonicalizer max iterations identifier.
+  StringAttr getCanonicalizerMaxIterationsIdentifier(MLIRContext *context);
+
+  /// Returns canonicalizer max num rewrites identifier.
+  StringAttr getCanonicalizerMaxNumRewritesIdentifier(MLIRContext *context);
+
+  /// Returns L1 cache size identifier
+  StringAttr getL1CacheSizeInBytesIdentifier(MLIRContext *context);
+
+  /// Returns the interface spec for device ID
+  /// Since we verify that the spec contains device ID the function
+  /// will return a valid spec.
+  DataLayoutEntryInterface getSpecForDeviceID(MLIRContext *context);
+
+  /// Returns the interface spec for device type
+  /// Since we verify that the spec contains device type the function
+  /// will return a valid spec.
+  DataLayoutEntryInterface getSpecForDeviceType(MLIRContext *context);
+
+  /// Returns the interface spec for max vector op width
+  /// Since max vector op width is an optional property, this function will
+  /// return a valid spec if the property is defined, otherwise it
+  /// will return an empty spec.
+  DataLayoutEntryInterface getSpecForMaxVectorOpWidth(MLIRContext *context);
+
+  /// Returns the interface spec for L1 cache size
+  /// Since L1 cache size is an optional property, this function will
+  /// return a valid spec if the property is defined, otherwise it
+  /// will return an empty spec.
+  DataLayoutEntryInterface getSpecForL1CacheSizeInBytes(MLIRContext *context);
+
+  /// Returns the interface spec for canonicalizer max iterations.
+  /// Since this is an optional property, this function will
+  /// return a valid spec if the property is defined, otherwise it
+  /// will return an empty spec.
+  DataLayoutEntryInterface
+  getSpecForCanonicalizerMaxIterations(MLIRContext *context);
+
+  /// Returns the interface spec for canonicalizer max num rewrites.
+  /// Since this is an optional property, this function will
+  /// return a valid spec if the property is defined, otherwise it
+  /// will return an empty spec.
+  DataLayoutEntryInterface
+  getSpecForCanonicalizerMaxNumRewrites(MLIRContext *context);
+
+  /// Return the value of device ID
+  uint32_t getDeviceID(MLIRContext *context);
+
+  static constexpr StringLiteral name = "builtin.target_device_description";
+};
+
 } // namespace mlir
 
 #include "mlir/Dialect/DLTI/DLTIDialect.h.inc"
diff --git a/mlir/include/mlir/Dialect/DLTI/DLTIBase.td b/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
index 3572a99fad874..c9a054b3c1e51 100644
--- a/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
+++ b/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
@@ -27,6 +27,13 @@ def DLTI_Dialect : Dialect {
     constexpr const static ::llvm::StringLiteral
     kDataLayoutAttrName = "dlti.dl_spec";
 
+    // Top level attribute name for target system description
+    constexpr const static ::llvm::StringLiteral
+    kTargetSystemDescAttrName = "dlti.tsd_spec";
+
+    constexpr const static ::llvm::StringLiteral
+    kTargetDeviceDescAttrName = "dlti.tdd_spec";
+
     // Constants used in entries.
     constexpr const static ::llvm::StringLiteral
     kDataLayoutEndiannessKey = "dlti.endianness";
@@ -48,6 +55,25 @@ def DLTI_Dialect : Dialect {
 
     constexpr const static ::llvm::StringLiteral
     kDataLayoutStackAlignmentKey = "dlti.stack_alignment";
+
+    // Constants used in target description part of DLTI
+    constexpr const static ::llvm::StringLiteral
+    kTargetDeviceIDKey = "dlti.device_id";
+
+    constexpr const static ::llvm::StringLiteral
+    kTargetDeviceTypeKey = "dlti.device_type";
+
+    constexpr const static ::llvm::StringLiteral
+    kTargetDeviceMaxVectorOpWidthKey = "dlti.max_vector_op_width";
+
+    constexpr const static ::llvm::StringLiteral
+    kTargetDeviceCanonicalizerMaxIterationsKey = "dlti.canonicalizer_max_iterations";
+
+    constexpr const static ::llvm::StringLiteral
+    kTargetDeviceCanonicalizerMaxNumRewritesKey = "dlti.canonicalizer_max_num_rewrites";
+
+    constexpr const static ::llvm::StringLiteral
+    kTargetDeviceL1CacheSizeInBytesKey = "dlti.L1_cache_size_in_bytes";
   }];
 
   let useDefaultAttributePrinterParser = 1;
@@ -71,6 +97,24 @@ def DLTI_DataLayoutSpecAttr : DialectAttr<
   let convertFromStorage = "$_self";
 }
 
+def DLTI_TargetSystemDescSpecAttr : DialectAttr<
+    DLTI_Dialect,
+    CPred<"::llvm::isa<::mlir::TargetSystemDescSpecAttr>($_self)">,
+    "Target system description part of DLTI"> {
+  let storageType = "::mlir::TargetSystemDescSpecAttr";
+  let returnType = "::mlir::TargetSystemDescSpecAttr";
+  let convertFromStorage = "$_self";
+}
+
+def DLTI_TargetDeviceDescSpecAttr : DialectAttr<
+    DLTI_Dialect,
+    CPred<"::llvm::isa<::mlir::TargetDeviceDescSpecAttr>($_self)">,
+    "Target device description part of DLTI"> {
+  let storageType = "::mlir::TargetDeviceDescSpecAttr";
+  let returnType = "::mlir::TargetDeviceDescSpecAttr";
+  let convertFromStorage = "$_self";
+}
+
 def HasDefaultDLTIDataLayout : NativeOpTrait<"HasDefaultDLTIDataLayout"> {
   let cppNamespace = "::mlir";
 }
diff --git a/mlir/include/mlir/Dialect/DLTI/Traits.h b/mlir/include/mlir/Dialect/DLTI/Traits.h
index 5d86195305a95..44083d54c4cad 100644
--- a/mlir/include/mlir/Dialect/DLTI/Traits.h
+++ b/mlir/include/mlir/Dialect/DLTI/Traits.h
@@ -18,6 +18,7 @@ class DataLayoutSpecAttr;
 namespace impl {
 LogicalResult verifyHasDefaultDLTIDataLayoutTrait(Operation *op);
 DataLayoutSpecInterface getDataLayoutSpec(Operation *op);
+TargetSystemDescSpecInterface getTargetSystemDescSpec(Operation *op);
 } // namespace impl
 
 /// Trait to be used by operations willing to use the implementation of the
@@ -37,6 +38,12 @@ class HasDefaultDLTIDataLayout
   DataLayoutSpecInterface getDataLayoutSpec() {
     return impl::getDataLayoutSpec(this->getOperation());
   }
+
+  /// Returns the target system description specification as provided by DLTI
+  /// dialect
+  TargetSystemDescSpecInterface getTargetSystemDescSpec() {
+    return impl::getTargetSystemDescSpec(this->getOperation());
+  }
 };
 } // namespace mlir
 
diff --git a/mlir/include/mlir/IR/BuiltinOps.td b/mlir/include/mlir/IR/BuiltinOps.td
index eda24615c71ea..bdb4ce3ddfe20 100644
--- a/mlir/include/mlir/IR/BuiltinOps.td
+++ b/mlir/include/mlir/IR/BuiltinOps.td
@@ -78,6 +78,7 @@ def ModuleOp : Builtin_Op<"module", [
     //===------------------------------------------------------------------===//
 
     DataLayoutSpecInterface getDataLayoutSpec();
+    TargetSystemDescSpecInterface getTargetSystemDescSpec();
 
     //===------------------------------------------------------------------===//
     // OpAsmOpInterface Methods
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
index 76bf33e89a716..1584a13247dff 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
@@ -23,11 +23,17 @@
 namespace mlir {
 class DataLayout;
 class DataLayoutEntryInterface;
+class TargetDeviceDescSpecInterface;
+class TargetSystemDescSpecInterface;
 using DataLayoutEntryKey = llvm::PointerUnion<Type, StringAttr>;
 // Using explicit SmallVector size because we cannot infer the size from the
 // forward declaration, and we need the typedef in the actual declaration.
 using DataLayoutEntryList = llvm::SmallVector<DataLayoutEntryInterface, 4>;
 using DataLayoutEntryListRef = llvm::ArrayRef<DataLayoutEntryInterface>;
+// using TargetDeviceDescSpecList =
+// llvm::SmallVector<TargetDeviceDescSpecInterface, 4>;
+using TargetDeviceDescSpecListRef =
+    llvm::ArrayRef<TargetDeviceDescSpecInterface>;
 class DataLayoutOpInterface;
 class DataLayoutSpecInterface;
 class ModuleOp;
@@ -84,6 +90,24 @@ Attribute getDefaultGlobalMemorySpace(DataLayoutEntryInterface entry);
 /// DataLayoutInterface if specified, otherwise returns the default.
 uint64_t getDefaultStackAlignment(DataLayoutEntryInterface entry);
 
+/// return max vector op width from the specified DataLayoutEntry. If the
+/// property is missing from the entry, then return std::nullopt.
+std::optional<uint32_t> getMaxVectorOpWidth(DataLayoutEntryInterface entry);
+
+/// return L1 cache size in bytes from the specified DataLayoutEntry. If the
+/// property is missing from the entry, then return std::nullopt.
+std::optional<uint32_t> getL1CacheSizeInBytes(DataLayoutEntryInterface entry);
+
+/// return canonicalizer max iterations from the specified DataLayoutEntry.
+/// If the property is missing from the entry, then return std::nullopt.
+std::optional<int64_t>
+getCanonicalizerMaxIterations(DataLayoutEntryInterface entry);
+
+/// returncanonicalizer max num rewrites from the specified DataLayoutEntry.
+/// If the property is missing from the entry, then return std::nullopt.
+std::optional<int64_t>
+getCanonicalizerMaxNumRewrites(DataLayoutEntryInterface entry);
+
 /// Given a list of data layout entries, returns a new list containing the
 /// entries with keys having the given type ID, i.e. belonging to the same type
 /// class.
@@ -95,6 +119,11 @@ DataLayoutEntryList filterEntriesForType(DataLayoutEntryListRef entries,
 DataLayoutEntryInterface
 filterEntryForIdentifier(DataLayoutEntryListRef entries, StringAttr id);
 
+/// Given a list of target device entries, returns the entry that has the given
+/// identifier as key, if such an entry exists in the list.
+TargetDeviceDescSpecInterface
+filterEntryForIdentifier(TargetDeviceDescSpecListRef entries, StringAttr id);
+
 /// Verifies that the operation implementing the data layout interface, or a
 /// module operation, is valid. This calls the verifier of the spec attribute
 /// and checks if the layout is compatible with specs attached to the enclosing
@@ -106,6 +135,12 @@ LogicalResult verifyDataLayoutOp(Operation *op);
 /// and dialect interfaces for type and identifier keys respectively.
 LogicalResult verifyDataLayoutSpec(DataLayoutSpecInterface spec, Location loc);
 
+/// Verifies that a target system desc spec is valid. This dispatches to
+/// individual entry verifiers, and then to the verifiers implemented by the
+/// relevant dialect interfaces for identifier keys.
+LogicalResult verifyTargetSystemDescSpec(TargetSystemDescSpecInterface spec,
+                                         Location loc);
+
 /// Divides the known min value of the numerator by the denominator and rounds
 /// the result up to the next integer. Preserves the scalable flag.
 llvm::TypeSize divideCeil(llvm::TypeSize numerator, uint64_t denominator);
@@ -137,6 +172,13 @@ class DataLayoutDialectInterface
     return success();
   }
 
+  /// Checks whether the given data layout entry is valid and reports any errors
+  /// at the provided location. Derived classes should override this.
+  virtual LogicalResult verifyEntry(TargetDeviceDescSpecInterface entry,
+                                    Location loc) const {
+    return success();
+  }
+
   /// Default implementation of entry combination that combines identical
   /// entries and returns null otherwise.
   static DataLayoutEntryInterface
@@ -214,10 +256,33 @@ class DataLayout {
   /// unspecified.
   uint64_t getStackAlignment() const;
 
+  /// Returns for max vector op width if the property is defined for the given
+  /// device ID, otherwise return std::nullopt.
+  std::optional<uint32_t>
+      getMaxVectorOpWidth(TargetDeviceDescSpecInterface::DeviceID) const;
+
+  /// Returns for L1 cache size if the property is defined for the given
+  /// device ID, otherwise return std::nullopt.
+  std::optional<uint32_t>
+      getL1CacheSizeInBytes(TargetDeviceDescSpecInterface::DeviceID) const;
+
+  /// Returns for canonicalizer max iterations if the property is defined for
+  /// the given device ID, otherwise return std::nullopt.
+  std::optional<int64_t> getCanonicalizerMaxIterations(
+      TargetDeviceDescSpecInterface::DeviceID) const;
+
+  /// Returns for canonicalizer max rewrites if the property is defined for
+  /// the given device ID, otherwise return std::nullopt.
+  std::optional<int64_t> getCanonicalizerMaxNumRewrites(
+      TargetDeviceDescSpecInterface::DeviceID) const;
+
 private:
   /// Combined layout spec at the given scope.
   const DataLayoutSpecInterface originalLayout;
 
+  /// Combined target system desc spec at the given scope.
+  const TargetSystemDescSpecInterface originalTargetSystemDesc;
+
 #if LLVM_ENABLE_ABI_BREAKING_CHECKS
   /// List of enclosing layout specs.
   SmallVector<DataLayoutSpecInterface, 2> layoutStack;
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
index 9edc885b9c5a9..75e609dde8fcf 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
@@ -194,6 +194,182 @@ def DataLayoutSpecInterface : AttrInterface<"DataLayoutSpecInterface"> {
   }];
 }
 
+def TargetDeviceDescSpecInterface : AttrInterface<"TargetDeviceDescSpecInterface"> {
+  let cppNamespace = "::mlir";
+
+  let description = [{
+    Attribute interface describing a target device description specification.
+
+    A target device description specification is a list of device properties (key)
+    and their values for a specific device. The device is identified using "device_id"
+    (as a key and ui32 value) and "device_type" key which must have a string value.
+    Both "device_id" and "device_type" are mandatory keys. As an example, L1 cache
+    size could be a device property, and its value would be a device specific size.
+
+    A target device description specification is attached to a module as a module level
+    attribute.
+  }];
+
+  let methods = [
+    InterfaceMethod<
+      /*description=*/"Returns the list of layout entries.",
+      /*retTy=*/"::mlir::DataLayoutEntryListRef",
+      /*methodName=*/"getEntries",
+      /*args=*/(ins)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the entry related to the given identifier, if "
+                      "present.",
+      /*retTy=*/"::mlir::DataLayoutEntryInterface",
+      /*methodName=*/"getSpecForIdentifier",
+      /*args=*/(ins "::mlir::StringAttr":$identifier),
+      /*methodBody=*/"",
+      /*defaultImplementation=*/[{
+        return ::mlir::detail::filterEntryForIdentifier($_attr.getEntries(),
+                                                        identifier);
+      }]
+    >,
+    InterfaceMethod<
+      /*description=*/"Checks that the entry is well-formed, reports errors "
+                      "at the provided location.",
+      /*retTy=*/"::mlir::LogicalResult",
+      /*methodName=*/"verifyEntry",
+      /*args=*/(ins "::mlir::Location":$loc),
+      /*methodBody=*/"",
+      /*defaultImplementation=*/[{ return ::mlir::success(); }]
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the device ID identifier.",
+      /*retTy=*/"::mlir::StringAttr",
+      /*methodName=*/"getDeviceIDIdentifier",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the device type identifier.",
+      /*retTy=*/"::mlir::StringAttr",
+      /*methodName=*/"getDeviceTypeIdentifier",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the L1 cache size identifier.",
+      /*retTy=*/"::mlir::StringAttr",
+      /*methodName=*/"getMaxVectorOpWidthIdentifier",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns canonicalizer max iterations identifier.",
+      /*retTy=*/"::mlir::StringAttr",
+      /*methodName=*/"getCanonicalizerMaxIterationsIdentifier",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns canonicalizer max num rewrites identifier.",
+      /*retTy=*/"::mlir::StringAttr",
+      /*methodName=*/"getCanonicalizerMaxNumRewritesIdentifier",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the entry related to Device ID. The function"
+                      "will crash if the entry is missing.",
+      /*retTy=*/"::mlir::DataLayoutEntryInterface",
+      /*methodName=*/"getSpecForDeviceID",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the entry related to the given identifier. "
+                      "The function will crash if the entry is missing.",
+      /*retTy=*/"::mlir::DataLayoutEntryInterface",
+      /*methodName=*/"getSpecForDeviceType",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the entry related to the given identifier, if "
+                      "present. Otherwise, return empty spec.",
+      /*retTy=*/"::mlir::DataLayoutEntryInterface",
+      /*methodName=*/"getSpecForMaxVectorOpWidth",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the entry related to the given identifier, if "
+                      "present. Otherwise, return empty spec.",
+      /*retTy=*/"::mlir::DataLayoutEntryInterface",
+      /*methodName=*/"getSpecForL1CacheSizeInBytes",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the entry related to the given identifier, if "
+                      "present. Otherwise, return empty spec.",
+      /*retTy=*/"::mlir::DataLayoutEntryInterface",
+      /*methodName=*/"getSpecForCanonicalizerMaxIterations",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the entry related to the given identifier, if "
+                      "present. Otherwise, return empty spec.",
+      /*retTy=*/"::mlir::DataLayoutEntryInterface",
+      /*methodName=*/"getSpecForCanonicalizerMaxNumRewrites",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the entry related to the given identifier, if "
+                      "present.",
+      /*retTy=*/"uint32_t",
+      /*methodName=*/"getDeviceID",
+      /*args=*/(ins "::mlir::MLIRContext *":$context)
+    >,
+  ];
+
+  let extraClassDeclaration = [{
+    using DeviceID = uint32_t;
+  }];
+}
+
+def TargetSystemDescSpecInterface : AttrInterface<"TargetSystemDescSpecInterface"> {
+  let cppNamespace = "::mlir";
+
+  let description = [{
+    Attribute interface describing a target system description specification.
+
+    A target system description specification is a list of target device
+    specifications, with one device specification for a device in the system. As
+    such, a target system description specification allows specifying a heterogenous
+    system, with devices of different types (e.g., CPU, GPU, etc.)
+
+    The only requirement on a valid target system description specification is that
+    the "device_id" in every target device description specification needs to be
+    unique. This is because, ultimately, this "device_id" is used by the user to
+    query a value of a device property.
+  }];
+
+  let methods = [
+    InterfaceMethod<
+      /*description=*/"Returns the list of layout entries.",
+      /*retTy=*/"::mlir::TargetDeviceDescSpecListRef",
+      /*methodName=*/"getEntries",
+      /*args=*/(ins)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the device description spec for given device "
+                      "ID",
+      /*retTy=*/"::mlir::TargetDeviceDescSpecInterface",
+      /*methodName=*/"getDeviceDescForDeviceID",
+      /*args=*/(ins "int":$deviceID)
+    >,
+    InterfaceMethod<
+      /*description=*/"Verifies the validity of the specification and "
+                      "reports "
+                      "any errors at the given location.",
+      /*retTy=*/"::mlir::LogicalResult",
+      /*methodName=*/"verifySpec",
+      /*args=*/(ins "::mlir::Location":$loc),
+      /*methodBody=*/"",
+      /*defaultImplementation=*/[{
+        return ::mlir::detail::verifyTargetSystemDescSpec($_attr, loc);
+      }]
+    >
+  ];
+}
+
 //===----------------------------------------------------------------------===//
 // Operation interface
 //===----------------------------------------------------------------------===//
@@ -227,6 +403,14 @@ def DataLayoutOpInterface : OpInterface<"DataLayoutOpInterface"> {
       /*methodName=*/"getDataLayoutSpec",
       /*args=*/(ins)
     >,
+    InterfaceMethod<
+      /*description=*/"Returns the target system desc specification for this "
+                      "op, or "
+                      "null if it does not exist.",
+      /*retTy=*/"::mlir::TargetSystemDescSpecInterface",
+      /*methodName=*/"getTargetSystemDescSpec",
+      /*args=*/(ins)
+    >,
     StaticInterfaceMethod<
       /*description=*/"Returns the size of the given type computed using the "
                       "relevant entries. The data layout object can be used "
@@ -362,6 +546,50 @@ def DataLayoutOpInterface : OpInterface<"DataLayoutOpInterface"> {
         return ::mlir::detail::getDefaultStackAlignment(entry);
       }]
     >,
+    StaticInterfaceMethod<
+      /*description=*/"Returns the max vector op width, if the property is "
+                      "defined. Otherwise, it returns std::nullopt.",
+      /*retTy=*/"std::optional<uint32_t>",
+      /*methodName=*/"getMaxVectorOpWidth",
+      /*args=*/(ins "::mlir::DataLayoutEntryInterface":$entry),
+      /*methodBody=*/"",
+      /*defaultImplementation=*/[{
+        return ::mlir::detail::getMaxVectorOpWidth(entry);
+      }]
+    >,
+    StaticInterfaceMethod<
+      /*description=*/"Returns the L1 cache size in bytes, if the property is "
+                      "defined. Otherwise, it returns std::nullopt.",
+      /*retTy=*/"std::optional<uint32_t>",
+      /*methodName=*/"getL1CacheSizeInBytes",
+      /*args=*/(ins "::mlir::DataLayoutEntryInterface":$entry),
+      /*methodBody=*/"",
+      /*defaultImplementation=*/[{
+        return ::mlir::detail::getL1CacheSizeInBytes(entry);
+      }]
+    >,
+    StaticInterfaceMethod<
+      /*description=*/"Returns the canonicalizer max iterations, if the "
+                      "property is defined. Otherwise, it returns std::nullopt.",
+      /*retTy=*/"std::optional<int64_t>",
+      /*methodName=*/"getCanonicalizerMaxIterations",
+      /*args=*/(ins "::mlir::DataLayoutEntryInterface":$entry),
+      /*methodBody=*/"",
+      /*defaultImplementation=*/[{
+        return ::mlir::detail::getCanonicalizerMaxIterations(entry);
+      }]
+    >,
+    StaticInterfaceMethod<
+      /*description=*/"Returns the canonicalizer max num rewrites, if the "
+                      "property is defined. Otherwise, it returns std::nullopt.",
+      /*retTy=*/"std::optional<int64_t>",
+      /*methodName=*/"getCanonicalizerMaxNumRewrites",
+      /*args=*/(ins "::mlir::DataLayoutEntryInterface":$entry),
+      /*methodBody=*/"",
+      /*defaultImplementation=*/[{
+        return ::mlir::detail::getCanonicalizerMaxNumRewrites(entry);
+      }]
+    >,
   ];
 
   let verify = [{ return ::mlir::detail::verifyDataLayoutOp($_op); }];
diff --git a/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp b/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp
index 033e66c6118f3..8ff2b2104b998 100644
--- a/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp
+++ b/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp
@@ -15,6 +15,7 @@
 #include "mlir/Dialect/LLVMIR/LLVMDialect.h"
 #include "mlir/Dialect/LLVMIR/ROCDLDialect.h"
 #include "mlir/IR/BuiltinTypes.h"
+#include "mlir/IR/Operation.h"
 #include "mlir/IR/TypeUtilities.h"
 #include "mlir/Pass/Pass.h"
 
@@ -29,6 +30,8 @@ namespace mlir {
 using namespace mlir;
 using namespace mlir::amdgpu;
 
+#define DEBUG_TYPE "amd-gpu-to-rocdl"
+
 static Value createI32Constant(ConversionPatternRewriter &rewriter,
                                Location loc, int32_t value) {
   Type llvmI32 = rewriter.getI32Type();
@@ -49,7 +52,6 @@ struct RawBufferOpLowering : public ConvertOpToLLVMPattern<GpuOp> {
       : ConvertOpToLLVMPattern<GpuOp>(converter), chipset(chipset) {}
 
   Chipset chipset;
-  static constexpr uint32_t maxVectorOpWidth = 128;
 
   LogicalResult
   matchAndRewrite(GpuOp gpuOp, typename GpuOp::Adaptor adaptor,
@@ -111,6 +113,15 @@ struct RawBufferOpLowering : public ConvertOpToLLVMPattern<GpuOp> {
     if (auto dataVector = dyn_cast<VectorType>(wantedDataType)) {
       uint32_t elemBits = dataVector.getElementTypeBitWidth();
       uint32_t totalBits = elemBits * dataVector.getNumElements();
+      uint32_t maxVectorOpWidth = 128; // default value
+      if (std::optional<uint32_t> v =
+              DataLayout(gpuOp->template getParentOfType<mlir::ModuleOp>())
+                  .getMaxVectorOpWidth(1 /* gpu ID*/)) {
+        maxVectorOpWidth = *v;
+      }
+      LLVM_DEBUG(llvm::dbgs() << "[CostModel] GPU MaxVectorWidth:"
+                              << maxVectorOpWidth << "\n");
+
       if (totalBits > maxVectorOpWidth)
         return gpuOp.emitOpError(
             "Total width of loads or stores must be no more than " +
diff --git a/mlir/lib/Dialect/DLTI/DLTI.cpp b/mlir/lib/Dialect/DLTI/DLTI.cpp
index 98a8865ef4da3..a8518469c7824 100644
--- a/mlir/lib/Dialect/DLTI/DLTI.cpp
+++ b/mlir/lib/Dialect/DLTI/DLTI.cpp
@@ -10,14 +10,21 @@
 #include "mlir/IR/Builders.h"
 #include "mlir/IR/BuiltinDialect.h"
 #include "mlir/IR/BuiltinOps.h"
+#include "mlir/IR/BuiltinTypes.h"
 #include "mlir/IR/Dialect.h"
 #include "mlir/IR/DialectImplementation.h"
 #include "llvm/ADT/TypeSwitch.h"
 
+#include "llvm/ADT/TypeSwitch.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/MathExtras.h"
+
 using namespace mlir;
 
 #include "mlir/Dialect/DLTI/DLTIDialect.cpp.inc"
 
+#define DEBUG_TYPE "dlti"
+
 //===----------------------------------------------------------------------===//
 // DataLayoutEntryAttr
 //===----------------------------------------------------------------------===//
@@ -337,6 +344,320 @@ void DataLayoutSpecAttr::print(AsmPrinter &os) const {
   os << ">";
 }
 
+//===----------------------------------------------------------------------===//
+// TargetDeviceDescSpecAttr
+//===----------------------------------------------------------------------===//
+constexpr const StringLiteral mlir::TargetDeviceDescSpecAttr::kAttrKeyword;
+
+constexpr const StringLiteral mlir::DLTIDialect::kTargetDeviceIDKey;
+constexpr const StringLiteral mlir::DLTIDialect::kTargetDeviceTypeKey;
+constexpr const StringLiteral
+    mlir::DLTIDialect::kTargetDeviceMaxVectorOpWidthKey;
+constexpr const StringLiteral
+    mlir::DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey;
+constexpr const StringLiteral
+    mlir::DLTIDialect::kTargetDeviceCanonicalizerMaxIterationsKey;
+constexpr const StringLiteral
+    mlir::DLTIDialect::kTargetDeviceCanonicalizerMaxNumRewritesKey;
+
+namespace mlir {
+namespace impl {
+class TargetDeviceDescSpecAttrStorage : public AttributeStorage {
+public:
+  using KeyTy = ArrayRef<DataLayoutEntryInterface>;
+
+  TargetDeviceDescSpecAttrStorage(KeyTy entries) : entries(entries) {}
+
+  bool operator==(const KeyTy &key) const { return key == entries; }
+
+  static TargetDeviceDescSpecAttrStorage *
+  construct(AttributeStorageAllocator &allocator, const KeyTy &key) {
+    return new (allocator.allocate<TargetDeviceDescSpecAttrStorage>())
+        TargetDeviceDescSpecAttrStorage(allocator.copyInto(key));
+  }
+
+  ArrayRef<DataLayoutEntryInterface> entries;
+};
+} // namespace impl
+} // namespace mlir
+
+TargetDeviceDescSpecAttr
+TargetDeviceDescSpecAttr::get(MLIRContext *ctx,
+                              ArrayRef<DataLayoutEntryInterface> entries) {
+  return Base::get(ctx, entries);
+}
+
+DataLayoutEntryListRef TargetDeviceDescSpecAttr::getEntries() const {
+  return getImpl()->entries;
+}
+
+TargetDeviceDescSpecAttr TargetDeviceDescSpecAttr::getChecked(
+    function_ref<InFlightDiagnostic()> emitError, MLIRContext *context,
+    ArrayRef<DataLayoutEntryInterface> entries) {
+  return Base::getChecked(emitError, context, entries);
+}
+
+LogicalResult
+TargetDeviceDescSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
+                                 ArrayRef<DataLayoutEntryInterface> entries) {
+  // Entries in tdd_spec can only have StringAttr as key. It does not support
+  // type as a key. Hence not reusing DataLayoutEntryInterface::verify.
+  bool targetDeviceIDKeyPresentAndValid = false;
+  bool targetDeviceTypeKeyPresentAndValid = false;
+
+  DenseSet<StringAttr> ids;
+  for (DataLayoutEntryInterface entry : entries) {
+    if (auto type = llvm::dyn_cast_if_present<Type>(entry.getKey())) {
+      return emitError()
+             << "dlti.tdd_spec attribute does not allow type as a key: "
+             << type;
+    } else {
+      auto id = entry.getKey().get<StringAttr>();
+      if (!ids.insert(id).second)
+        return emitError() << "repeated layout entry key: " << id.getValue();
+    }
+
+    // check that Device ID and Device Type are present.
+    StringRef entryName = entry.getKey().get<StringAttr>().strref();
+    if (entryName == DLTIDialect::kTargetDeviceIDKey) {
+      // Also check the type of the value.
+      IntegerAttr value =
+          llvm::dyn_cast_if_present<IntegerAttr>(entry.getValue());
+      if (value && value.getType().isUnsignedInteger(32)) {
+        targetDeviceIDKeyPresentAndValid = true;
+      }
+    } else if (entryName == DLTIDialect::kTargetDeviceTypeKey) {
+      // Also check the type of the value.
+      if (auto value = llvm::dyn_cast<StringAttr>(entry.getValue())) {
+        targetDeviceTypeKeyPresentAndValid = true;
+      }
+    }
+  }
+
+  // check that both DeviceID and DeviceType are present
+  // and are of correct type.
+  if (!targetDeviceIDKeyPresentAndValid) {
+    return emitError() << "tdd_spec requires key: "
+                       << DLTIDialect::kTargetDeviceIDKey
+                       << " and its value of ui32 type";
+  }
+  if (!targetDeviceTypeKeyPresentAndValid) {
+    return emitError() << "tdd_spec requires key: "
+                       << DLTIDialect::kTargetDeviceTypeKey
+                       << " and its value of string type";
+  }
+
+  return success();
+}
+
+/// Parses an attribute with syntax
+///   tdd_spec_attr ::= `#target.` `tdd_spec` `<` dl-entry-attr-list? `>`
+///   dl-entry-attr-list ::= dl-entry-attr
+///                         | dl-entry-attr `,` dl-entry-attr-list
+TargetDeviceDescSpecAttr TargetDeviceDescSpecAttr::parse(AsmParser &parser) {
+  if (failed(parser.parseLess()))
+    return {};
+
+  // Empty spec.
+  if (succeeded(parser.parseOptionalGreater()))
+    return get(parser.getContext(), {});
+
+  SmallVector<DataLayoutEntryInterface> entries;
+  if (parser.parseCommaSeparatedList(
+          [&]() { return parser.parseAttribute(entries.emplace_back()); }) ||
+      parser.parseGreater())
+    return {};
+
+  return getChecked([&] { return parser.emitError(parser.getNameLoc()); },
+                    parser.getContext(), entries);
+}
+
+void TargetDeviceDescSpecAttr::print(AsmPrinter &os) const {
+  os << TargetDeviceDescSpecAttr::kAttrKeyword << "<";
+  llvm::interleaveComma(getEntries(), os);
+  os << ">";
+}
+
+// ---------------------------------------------------------------------------//
+//                      Support for specific keys
+// ---------------------------------------------------------------------------//
+
+StringAttr
+TargetDeviceDescSpecAttr::getDeviceIDIdentifier(MLIRContext *context) {
+  return Builder(context).getStringAttr(DLTIDialect::kTargetDeviceIDKey);
+}
+
+StringAttr
+TargetDeviceDescSpecAttr::getDeviceTypeIdentifier(MLIRContext *context) {
+  return Builder(context).getStringAttr(DLTIDialect::kTargetDeviceTypeKey);
+}
+
+StringAttr
+TargetDeviceDescSpecAttr::getMaxVectorOpWidthIdentifier(MLIRContext *context) {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kTargetDeviceMaxVectorOpWidthKey);
+}
+
+StringAttr TargetDeviceDescSpecAttr::getL1CacheSizeInBytesIdentifier(
+    MLIRContext *context) {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey);
+}
+
+StringAttr TargetDeviceDescSpecAttr::getCanonicalizerMaxIterationsIdentifier(
+    MLIRContext *context) {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kTargetDeviceCanonicalizerMaxIterationsKey);
+}
+
+StringAttr TargetDeviceDescSpecAttr::getCanonicalizerMaxNumRewritesIdentifier(
+    MLIRContext *context) {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kTargetDeviceCanonicalizerMaxNumRewritesKey);
+}
+
+DataLayoutEntryInterface
+TargetDeviceDescSpecAttr::getSpecForDeviceID(MLIRContext *context) {
+  return getSpecForIdentifier(getDeviceIDIdentifier(context));
+}
+
+DataLayoutEntryInterface
+TargetDeviceDescSpecAttr::getSpecForDeviceType(MLIRContext *context) {
+  return getSpecForIdentifier(getDeviceTypeIdentifier(context));
+}
+
+DataLayoutEntryInterface
+TargetDeviceDescSpecAttr::getSpecForMaxVectorOpWidth(MLIRContext *context) {
+  return getSpecForIdentifier(getMaxVectorOpWidthIdentifier(context));
+}
+
+DataLayoutEntryInterface
+TargetDeviceDescSpecAttr::getSpecForL1CacheSizeInBytes(MLIRContext *context) {
+  return getSpecForIdentifier(getL1CacheSizeInBytesIdentifier(context));
+}
+
+DataLayoutEntryInterface
+TargetDeviceDescSpecAttr::getSpecForCanonicalizerMaxIterations(
+    MLIRContext *context) {
+  return getSpecForIdentifier(getCanonicalizerMaxIterationsIdentifier(context));
+}
+
+DataLayoutEntryInterface
+TargetDeviceDescSpecAttr::getSpecForCanonicalizerMaxNumRewrites(
+    MLIRContext *context) {
+  return getSpecForIdentifier(
+      getCanonicalizerMaxNumRewritesIdentifier(context));
+}
+
+uint32_t TargetDeviceDescSpecAttr::getDeviceID(MLIRContext *context) {
+  DataLayoutEntryInterface entry = getSpecForDeviceID(context);
+  return llvm::cast<IntegerAttr>(entry.getValue()).getValue().getZExtValue();
+}
+
+//===----------------------------------------------------------------------===//
+// TargetSystemDescSpecAttr
+//===----------------------------------------------------------------------===//
+
+constexpr const StringLiteral mlir::TargetSystemDescSpecAttr::kAttrKeyword;
+
+namespace mlir {
+namespace impl {
+class TargetSystemDescSpecAttrStorage : public AttributeStorage {
+public:
+  using KeyTy = ArrayRef<TargetDeviceDescSpecInterface>;
+
+  TargetSystemDescSpecAttrStorage(KeyTy entries) : entries(entries) {}
+
+  bool operator==(const KeyTy &key) const { return key == entries; }
+
+  static TargetSystemDescSpecAttrStorage *
+  construct(AttributeStorageAllocator &allocator, const KeyTy &key) {
+    return new (allocator.allocate<TargetSystemDescSpecAttrStorage>())
+        TargetSystemDescSpecAttrStorage(allocator.copyInto(key));
+  }
+
+  // This could be a map of DeviceID to DeviceDesc for faster lookup.
+  ArrayRef<TargetDeviceDescSpecInterface> entries;
+};
+} // namespace impl
+} // namespace mlir
+
+TargetSystemDescSpecAttr
+TargetSystemDescSpecAttr::get(MLIRContext *context,
+                              ArrayRef<TargetDeviceDescSpecInterface> entries) {
+  return Base::get(context, entries);
+}
+
+TargetDeviceDescSpecListRef TargetSystemDescSpecAttr::getEntries() const {
+  return getImpl()->entries;
+}
+
+TargetDeviceDescSpecInterface
+TargetSystemDescSpecAttr::getDeviceDescForDeviceID(
+    TargetDeviceDescSpecInterface::DeviceID DeviceID) {
+  for (TargetDeviceDescSpecInterface entry : getEntries()) {
+    if (entry.getDeviceID(getContext()) == DeviceID)
+      return entry;
+  }
+  return TargetDeviceDescSpecInterface();
+}
+
+TargetSystemDescSpecAttr TargetSystemDescSpecAttr::getChecked(
+    function_ref<InFlightDiagnostic()> emitError, MLIRContext *context,
+    ArrayRef<TargetDeviceDescSpecInterface> entries) {
+  return Base::getChecked(emitError, context, entries);
+}
+
+LogicalResult TargetSystemDescSpecAttr::verify(
+    function_ref<InFlightDiagnostic()> emitError,
+    ArrayRef<TargetDeviceDescSpecInterface> entries) {
+  DenseSet<uint32_t> device_ids;
+
+  for (TargetDeviceDescSpecInterface tdd_spec : entries) {
+    // First verify that a target device desc spec is valid.
+    if (failed(
+            TargetDeviceDescSpecAttr::verify(emitError, tdd_spec.getEntries())))
+      return failure();
+
+    // Check that device IDs are unique across all entries.
+    MLIRContext *context = tdd_spec.getContext();
+    uint32_t device_id = tdd_spec.getDeviceID(context);
+    if (!device_ids.insert(device_id).second) {
+      return emitError() << "repeated Device ID in dlti.tsd_spec: "
+                         << device_id;
+    }
+  }
+  return success();
+}
+
+/// Parses an attribute with syntax
+///   attr ::= `#target.` `tsd_spec` `<` tdd-spec-attr-list? `>`
+///   tdd-spec-attr-list ::= tdd_spec
+///                         | tdd_spec `,` tdd_spec_attr_list
+TargetSystemDescSpecAttr TargetSystemDescSpecAttr::parse(AsmParser &parser) {
+  if (failed(parser.parseLess()))
+    return {};
+
+  // Empty spec.
+  if (succeeded(parser.parseOptionalGreater()))
+    return get(parser.getContext(), {});
+
+  SmallVector<TargetDeviceDescSpecInterface> entries;
+  if (parser.parseCommaSeparatedList(
+          [&]() { return parser.parseAttribute(entries.emplace_back()); }) ||
+      parser.parseGreater())
+    return {};
+
+  return getChecked([&] { return parser.emitError(parser.getNameLoc()); },
+                    parser.getContext(), entries);
+}
+
+void TargetSystemDescSpecAttr::print(AsmPrinter &os) const {
+  os << TargetSystemDescSpecAttr::kAttrKeyword << "<";
+  llvm::interleaveComma(getEntries(), os);
+  os << ">";
+}
+
 //===----------------------------------------------------------------------===//
 // DLTIDialect
 //===----------------------------------------------------------------------===//
@@ -375,9 +696,36 @@ class TargetDataLayoutInterface : public DataLayoutDialectInterface {
 };
 } // namespace
 
+namespace {
+class SystemDescSpecInterface : public DataLayoutDialectInterface {
+public:
+  using DataLayoutDialectInterface::DataLayoutDialectInterface;
+
+  LogicalResult verifyEntry(TargetDeviceDescSpecInterface entry,
+                            Location loc) const final {
+
+    for (DataLayoutEntryInterface dl_entry : entry.getEntries()) {
+      StringRef entryName = dl_entry.getKey().get<StringAttr>().strref();
+      // Check that the key name is known to us. Although, we may allow keys
+      // unknown to us.
+      if (entryName != DLTIDialect::kTargetDeviceIDKey &&
+          entryName != DLTIDialect::kTargetDeviceTypeKey &&
+          entryName != DLTIDialect::kTargetDeviceMaxVectorOpWidthKey &&
+          entryName != DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey &&
+          entryName !=
+              DLTIDialect::kTargetDeviceCanonicalizerMaxIterationsKey &&
+          entryName != DLTIDialect::kTargetDeviceCanonicalizerMaxNumRewritesKey)
+        return emitError(loc) << "unknown target desc key name: " << entryName;
+    }
+    return success();
+  }
+};
+} // namespace
+
 void DLTIDialect::initialize() {
-  addAttributes<DataLayoutEntryAttr, DataLayoutSpecAttr>();
-  addInterfaces<TargetDataLayoutInterface>();
+  addAttributes<DataLayoutEntryAttr, DataLayoutSpecAttr,
+                TargetSystemDescSpecAttr, TargetDeviceDescSpecAttr>();
+  addInterfaces<TargetDataLayoutInterface, SystemDescSpecInterface>();
 }
 
 Attribute DLTIDialect::parseAttribute(DialectAsmParser &parser,
@@ -390,6 +738,10 @@ Attribute DLTIDialect::parseAttribute(DialectAsmParser &parser,
     return DataLayoutEntryAttr::parse(parser);
   if (attrKind == DataLayoutSpecAttr::kAttrKeyword)
     return DataLayoutSpecAttr::parse(parser);
+  if (attrKind == TargetSystemDescSpecAttr::kAttrKeyword)
+    return TargetSystemDescSpecAttr::parse(parser);
+  if (attrKind == TargetDeviceDescSpecAttr::kAttrKeyword)
+    return TargetDeviceDescSpecAttr::parse(parser);
 
   parser.emitError(parser.getNameLoc(), "unknown attrribute type: ")
       << attrKind;
@@ -398,8 +750,8 @@ Attribute DLTIDialect::parseAttribute(DialectAsmParser &parser,
 
 void DLTIDialect::printAttribute(Attribute attr, DialectAsmPrinter &os) const {
   llvm::TypeSwitch<Attribute>(attr)
-      .Case<DataLayoutEntryAttr, DataLayoutSpecAttr>(
-          [&](auto a) { a.print(os); })
+      .Case<DataLayoutEntryAttr, DataLayoutSpecAttr, TargetSystemDescSpecAttr,
+            TargetDeviceDescSpecAttr>([&](auto a) { a.print(os); })
       .Default([](Attribute) { llvm_unreachable("unknown attribute kind"); });
 }
 
@@ -413,6 +765,13 @@ LogicalResult DLTIDialect::verifyOperationAttribute(Operation *op,
     if (isa<ModuleOp>(op))
       return detail::verifyDataLayoutOp(op);
     return success();
+  } else if (attr.getName() == DLTIDialect::kTargetSystemDescAttrName) {
+    if (!llvm::isa<TargetSystemDescSpecAttr>(attr.getValue())) {
+      return op->emitError()
+             << "'" << DLTIDialect::kTargetSystemDescAttrName
+             << "' is expected to be a #dlti.tsd_spec attribute";
+    }
+    return success();
   }
 
   return op->emitError() << "attribute '" << attr.getName().getValue()
diff --git a/mlir/lib/Dialect/DLTI/Traits.cpp b/mlir/lib/Dialect/DLTI/Traits.cpp
index 85acbee46defd..ead656774a27c 100644
--- a/mlir/lib/Dialect/DLTI/Traits.cpp
+++ b/mlir/lib/Dialect/DLTI/Traits.cpp
@@ -27,3 +27,9 @@ DataLayoutSpecInterface mlir::impl::getDataLayoutSpec(Operation *op) {
   return op->getAttrOfType<DataLayoutSpecAttr>(
       DLTIDialect::kDataLayoutAttrName);
 }
+
+TargetSystemDescSpecInterface
+mlir::impl::getTargetSystemDescSpec(Operation *op) {
+  return op->getAttrOfType<TargetSystemDescSpecAttr>(
+      DLTIDialect::kTargetSystemDescAttrName);
+}
diff --git a/mlir/lib/Dialect/Linalg/Transforms/BlockPackMatmul.cpp b/mlir/lib/Dialect/Linalg/Transforms/BlockPackMatmul.cpp
index 91d4efa3372b7..c08224f7af54e 100644
--- a/mlir/lib/Dialect/Linalg/Transforms/BlockPackMatmul.cpp
+++ b/mlir/lib/Dialect/Linalg/Transforms/BlockPackMatmul.cpp
@@ -18,6 +18,8 @@
 
 #include <optional>
 
+#define DEBUG_TYPE "block-pack-matmul"
+
 namespace mlir {
 #define GEN_PASS_DEF_LINALGBLOCKPACKMATMUL
 #include "mlir/Dialect/Linalg/Passes.h.inc"
@@ -134,6 +136,24 @@ transposePackedMatmul(RewriterBase &rewriter, linalg::LinalgOp linalgOp,
   return packTransposedMatmul;
 }
 
+static SmallVector<int64_t> getDefaultBlockFactors(linalg::LinalgOp linalgOp) {
+  // get L1 cache size first.
+  uint32_t L1_cache_size = 4096; // default value
+  uint32_t cpuID = 0;
+  ModuleOp moduleOp = linalgOp->getParentOfType<ModuleOp>();
+  if (std::optional<int64_t> v =
+          DataLayout(moduleOp).getL1CacheSizeInBytes(cpuID)) {
+    L1_cache_size = *v;
+  }
+
+  // block_size = sqrt(L1_cache_size) rounded down to nearest power of 2.
+  int64_t block_size =
+      std::pow(2, std::floor(std::log2(std::sqrt(L1_cache_size))));
+  // we use same block size for all dims.
+  LLVM_DEBUG(llvm::dbgs() << "block_size:" << block_size << "\n");
+  return {block_size, block_size, block_size};
+}
+
 /// Pack a matmul operation into blocked 4D layout.
 FailureOr<PackResult>
 linalg::blockPackMatmul(RewriterBase &rewriter, linalg::LinalgOp linalgOp,
@@ -146,7 +166,7 @@ linalg::blockPackMatmul(RewriterBase &rewriter, linalg::LinalgOp linalgOp,
     return rewriter.notifyMatchFailure(linalgOp, "invalid packing options");
 
   if (options->blockFactors.size() != 3)
-    return rewriter.notifyMatchFailure(linalgOp, "require 3 tile factors");
+    options->blockFactors = getDefaultBlockFactors(linalgOp);
 
   SmallVector<OpFoldResult> mnkTiles =
       getAsOpFoldResult(rewriter.getI64ArrayAttr(options->blockFactors));
diff --git a/mlir/lib/IR/BuiltinDialect.cpp b/mlir/lib/IR/BuiltinDialect.cpp
index dcb1119fe5207..1d57e0bdef187 100644
--- a/mlir/lib/IR/BuiltinDialect.cpp
+++ b/mlir/lib/IR/BuiltinDialect.cpp
@@ -155,6 +155,17 @@ DataLayoutSpecInterface ModuleOp::getDataLayoutSpec() {
   return {};
 }
 
+TargetSystemDescSpecInterface ModuleOp::getTargetSystemDescSpec() {
+  // Take the first and only (if present) attribute that implements the
+  // interface. This needs a linear search, but is called only once per data
+  // layout object construction that is used for repeated queries.
+  for (NamedAttribute attr : getOperation()->getAttrs())
+    if (auto spec =
+            llvm::dyn_cast<TargetSystemDescSpecInterface>(attr.getValue()))
+      return spec;
+  return {};
+}
+
 LogicalResult ModuleOp::verify() {
   // Check that none of the attributes are non-dialect attributes, except for
   // the symbol related attributes.
diff --git a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
index 15cfb3dbaf745..857ccf03ed8c0 100644
--- a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
+++ b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
@@ -293,6 +293,50 @@ mlir::detail::getDefaultStackAlignment(DataLayoutEntryInterface entry) {
   return value.getValue().getZExtValue();
 }
 
+// Returns the max vector op width if specified in the given entry. If the entry
+// is empty (meaning the spec is missing), returns std::nullopt.
+std::optional<uint32_t>
+mlir::detail::getMaxVectorOpWidth(DataLayoutEntryInterface entry) {
+  if (entry == DataLayoutEntryInterface())
+    return std::nullopt;
+
+  auto value = cast<IntegerAttr>(entry.getValue());
+  return value.getValue().getZExtValue();
+}
+
+// Returns the L1 cache size if specified in the given entry. If the entry
+// is empty (meaning the spec is missing), returns std::nullopt.
+std::optional<uint32_t>
+mlir::detail::getL1CacheSizeInBytes(DataLayoutEntryInterface entry) {
+  if (entry == DataLayoutEntryInterface())
+    return std::nullopt;
+
+  auto value = cast<IntegerAttr>(entry.getValue());
+  return value.getValue().getZExtValue();
+}
+
+// Returns the canonicalizer max iterations if specified in the given entry.
+// If the entry is empty (meaning the spec is missing), returns std::nullopt.
+std::optional<int64_t>
+mlir::detail::getCanonicalizerMaxIterations(DataLayoutEntryInterface entry) {
+  if (entry == DataLayoutEntryInterface())
+    return std::nullopt;
+
+  auto value = cast<IntegerAttr>(entry.getValue());
+  return value.getValue().getSExtValue();
+}
+
+// Returns the canonicalizer max num rewrites if specified in the given entry.
+// If the entry is empty (meaning the spec is missing), returns std::nullopt.
+std::optional<int64_t>
+mlir::detail::getCanonicalizerMaxNumRewrites(DataLayoutEntryInterface entry) {
+  if (entry == DataLayoutEntryInterface())
+    return std::nullopt;
+
+  auto value = cast<IntegerAttr>(entry.getValue());
+  return value.getValue().getSExtValue();
+}
+
 DataLayoutEntryList
 mlir::detail::filterEntriesForType(DataLayoutEntryListRef entries,
                                    TypeID typeID) {
@@ -324,6 +368,20 @@ static DataLayoutSpecInterface getSpec(Operation *operation) {
       });
 }
 
+static TargetSystemDescSpecInterface
+getTargetSystemDescSpec(Operation *operation) {
+  if (operation) {
+    ModuleOp moduleOp;
+    if (isa<ModuleOp>(operation)) {
+      moduleOp = llvm::dyn_cast<ModuleOp>(operation);
+    } else {
+      moduleOp = operation->getParentOfType<ModuleOp>();
+    }
+    return moduleOp.getTargetSystemDescSpec();
+  } else
+    return TargetSystemDescSpecInterface();
+}
+
 /// Populates `opsWithLayout` with the list of proper ancestors of `leaf` that
 /// are either modules or implement the `DataLayoutOpInterface`.
 static void
@@ -435,7 +493,8 @@ mlir::DataLayout::DataLayout() : DataLayout(ModuleOp()) {}
 mlir::DataLayout::DataLayout(DataLayoutOpInterface op)
     : originalLayout(getCombinedDataLayout(op)), scope(op),
       allocaMemorySpace(std::nullopt), programMemorySpace(std::nullopt),
-      globalMemorySpace(std::nullopt), stackAlignment(std::nullopt) {
+      globalMemorySpace(std::nullopt), stackAlignment(std::nullopt),
+      originalTargetSystemDesc(getTargetSystemDescSpec(op)) {
 #if LLVM_ENABLE_ABI_BREAKING_CHECKS
   checkMissingLayout(originalLayout, op);
   collectParentLayouts(op, layoutStack);
@@ -445,7 +504,8 @@ mlir::DataLayout::DataLayout(DataLayoutOpInterface op)
 mlir::DataLayout::DataLayout(ModuleOp op)
     : originalLayout(getCombinedDataLayout(op)), scope(op),
       allocaMemorySpace(std::nullopt), programMemorySpace(std::nullopt),
-      globalMemorySpace(std::nullopt), stackAlignment(std::nullopt) {
+      globalMemorySpace(std::nullopt), stackAlignment(std::nullopt),
+      originalTargetSystemDesc(getTargetSystemDescSpec(op)) {
 #if LLVM_ENABLE_ABI_BREAKING_CHECKS
   checkMissingLayout(originalLayout, op);
   collectParentLayouts(op, layoutStack);
@@ -640,6 +700,78 @@ uint64_t mlir::DataLayout::getStackAlignment() const {
   return *stackAlignment;
 }
 
+std::optional<uint32_t> mlir::DataLayout::getMaxVectorOpWidth(
+    TargetDeviceDescSpecInterface::DeviceID deviceID) const {
+  checkValid();
+  DataLayoutEntryInterface entry;
+  if (originalTargetSystemDesc)
+    entry =
+        originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID)
+            .getSpecForMaxVectorOpWidth(originalTargetSystemDesc.getContext());
+  // Currently I am not caching the results because we do not return
+  // default values of these properties. Instead if the property is
+  // missing, we return std::nullopt so that the users can resort to
+  // the default value however they want.
+  if (auto iface = dyn_cast_or_null<DataLayoutOpInterface>(scope))
+    return iface.getMaxVectorOpWidth(entry);
+  else
+    return detail::getMaxVectorOpWidth(entry);
+}
+
+std::optional<uint32_t> mlir::DataLayout::getL1CacheSizeInBytes(
+    TargetDeviceDescSpecInterface::DeviceID deviceID) const {
+  checkValid();
+  DataLayoutEntryInterface entry;
+  if (originalTargetSystemDesc)
+    entry = originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID)
+                .getSpecForL1CacheSizeInBytes(
+                    originalTargetSystemDesc.getContext());
+  // Currently I am not caching the results because we do not return
+  // default values of these properties. Instead if the property is
+  // missing, we return std::nullopt so that the users can resort to
+  // the default value however they want.
+  if (auto iface = dyn_cast_or_null<DataLayoutOpInterface>(scope))
+    return iface.getL1CacheSizeInBytes(entry);
+  else
+    return detail::getL1CacheSizeInBytes(entry);
+}
+
+std::optional<int64_t> mlir::DataLayout::getCanonicalizerMaxIterations(
+    TargetDeviceDescSpecInterface::DeviceID deviceID) const {
+  checkValid();
+  DataLayoutEntryInterface entry;
+  if (originalTargetSystemDesc)
+    entry = originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID)
+                .getSpecForCanonicalizerMaxIterations(
+                    originalTargetSystemDesc.getContext());
+  // Currently I am not caching the results because we do not return
+  // default values of these properties. Instead if the property is
+  // missing, we return std::nullopt so that the users can resort to
+  // the default value however they want.
+  if (auto iface = dyn_cast_or_null<DataLayoutOpInterface>(scope))
+    return iface.getCanonicalizerMaxIterations(entry);
+  else
+    return detail::getCanonicalizerMaxIterations(entry);
+}
+
+std::optional<int64_t> mlir::DataLayout::getCanonicalizerMaxNumRewrites(
+    TargetDeviceDescSpecInterface::DeviceID deviceID) const {
+  checkValid();
+  DataLayoutEntryInterface entry;
+  if (originalTargetSystemDesc)
+    entry = originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID)
+                .getSpecForCanonicalizerMaxNumRewrites(
+                    originalTargetSystemDesc.getContext());
+  // Currently I am not caching the results because we do not return
+  // default values of these properties. Instead if the property is
+  // missing, we return std::nullopt so that the users can resort to
+  // the default value however they want.
+  if (auto iface = dyn_cast_or_null<DataLayoutOpInterface>(scope))
+    return iface.getCanonicalizerMaxNumRewrites(entry);
+  else
+    return detail::getCanonicalizerMaxNumRewrites(entry);
+}
+
 //===----------------------------------------------------------------------===//
 // DataLayoutSpecInterface
 //===----------------------------------------------------------------------===//
@@ -744,6 +876,55 @@ LogicalResult mlir::detail::verifyDataLayoutSpec(DataLayoutSpecInterface spec,
   return success();
 }
 
+LogicalResult
+mlir::detail::verifyTargetSystemDescSpec(TargetSystemDescSpecInterface spec,
+                                         Location loc) {
+  DenseMap<StringAttr, DataLayoutEntryInterface> device_desc_keys;
+  DenseSet<uint32_t> device_ids;
+  for (TargetDeviceDescSpecInterface tdd_spec : spec.getEntries()) {
+    // First, verify individual target device desc specs.
+    if (failed(tdd_spec.verifyEntry(loc)))
+      return failure();
+
+    // Check that device IDs are unique across all entries.
+    MLIRContext *context = tdd_spec.getContext();
+    uint32_t device_id = tdd_spec.getDeviceID(context);
+    if (!device_ids.insert(device_id).second) {
+      return failure();
+    }
+
+    // collect all the keys used by all the tdd_specs.
+    for (DataLayoutEntryInterface entry : tdd_spec.getEntries()) {
+      if (auto type = llvm::dyn_cast_if_present<Type>(entry.getKey())) {
+        // tdd_spec does not support Type as a key.
+        return failure();
+      } else
+        device_desc_keys[entry.getKey().get<StringAttr>()] = entry;
+    }
+  }
+
+  for (const auto &kvp : device_desc_keys) {
+    StringAttr identifier = kvp.second.getKey().get<StringAttr>();
+    Dialect *dialect = identifier.getReferencedDialect();
+
+    // Ignore attributes that belong to an unknown dialect, the dialect may
+    // actually implement the relevant interface but we don't know about that.
+    if (!dialect)
+      continue;
+
+    const auto *iface = dyn_cast<DataLayoutDialectInterface>(dialect);
+    if (!iface) {
+      return emitError(loc)
+             << "the '" << dialect->getNamespace()
+             << "' dialect does not support identifier data layout entries";
+    }
+    if (failed(iface->verifyEntry(kvp.second, loc)))
+      return failure();
+  }
+
+  return success();
+}
+
 #include "mlir/Interfaces/DataLayoutAttrInterface.cpp.inc"
 #include "mlir/Interfaces/DataLayoutOpInterface.cpp.inc"
 #include "mlir/Interfaces/DataLayoutTypeInterface.cpp.inc"
diff --git a/mlir/lib/Transforms/Canonicalizer.cpp b/mlir/lib/Transforms/Canonicalizer.cpp
index d50019bd6aee5..2948804b8f92a 100644
--- a/mlir/lib/Transforms/Canonicalizer.cpp
+++ b/mlir/lib/Transforms/Canonicalizer.cpp
@@ -23,6 +23,8 @@ namespace mlir {
 
 using namespace mlir;
 
+#define DEBUG_TYPE "canonicalizer"
+
 namespace {
 /// Canonicalize operations in nested regions.
 struct Canonicalizer : public impl::CanonicalizerBase<Canonicalizer> {
@@ -48,6 +50,20 @@ struct Canonicalizer : public impl::CanonicalizerBase<Canonicalizer> {
     config.maxIterations = maxIterations;
     config.maxNumRewrites = maxNumRewrites;
 
+    LLVM_DEBUG(llvm::dbgs()
+               << "[CostModel] Canonicalizer MaxIterations (default):"
+               << config.maxIterations << "\n");
+    LLVM_DEBUG(llvm::dbgs()
+               << "[CostModel] Canonicalizer MaxNumRewrites (default):"
+               << config.maxNumRewrites << "\n");
+
+    LLVM_DEBUG(llvm::dbgs()
+               << "[CostModel] Canonicalizer MaxIterations (default):"
+               << config.maxIterations << "\n");
+    LLVM_DEBUG(llvm::dbgs()
+               << "[CostModel] Canonicalizer MaxNumRewrites (default):"
+               << config.maxNumRewrites << "\n");
+
     RewritePatternSet owningPatterns(context);
     for (auto *dialect : context->getLoadedDialects())
       dialect->getCanonicalizationPatterns(owningPatterns);
@@ -59,6 +75,41 @@ struct Canonicalizer : public impl::CanonicalizerBase<Canonicalizer> {
     return success();
   }
   void runOnOperation() override {
+    Operation *op = getOperation();
+    uint32_t cpuID = 0;
+
+    if (isa<ModuleOp>(op)) {
+      if (std::optional<int64_t> v =
+              DataLayout(llvm::dyn_cast<ModuleOp>(*op))
+                  .getCanonicalizerMaxIterations(cpuID)) {
+        config.maxIterations = *v;
+      }
+    } else {
+      ModuleOp moduleOp = op->getParentOfType<ModuleOp>();
+      if (std::optional<int64_t> v =
+              DataLayout(moduleOp).getCanonicalizerMaxIterations(cpuID)) {
+        config.maxIterations = *v;
+      }
+    }
+
+    if (isa<ModuleOp>(op)) {
+      if (std::optional<int64_t> v =
+              DataLayout(llvm::dyn_cast<ModuleOp>(*op))
+                  .getCanonicalizerMaxNumRewrites(cpuID)) {
+        config.maxNumRewrites = *v;
+      }
+    } else {
+      ModuleOp moduleOp = op->getParentOfType<ModuleOp>();
+      if (std::optional<int64_t> v =
+              DataLayout(moduleOp).getCanonicalizerMaxNumRewrites(cpuID)) {
+        config.maxNumRewrites = *v;
+      }
+    }
+    LLVM_DEBUG(llvm::dbgs() << "[CostModel] Canonicalizer MaxIterations (new):"
+                            << config.maxIterations << "\n");
+    LLVM_DEBUG(llvm::dbgs() << "[CostModel] Canonicalizer MaxNumRewrites (new):"
+                            << config.maxNumRewrites << "\n");
+
     LogicalResult converged =
         applyPatternsAndFoldGreedily(getOperation(), *patterns, config);
     // Canonicalization is best-effort. Non-convergence is not a pass failure.
diff --git a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
index 5f484294268ab..38f0ed0ed8da3 100644
--- a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
+++ b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
@@ -197,6 +197,11 @@ struct OpWithLayout : public Op<OpWithLayout, DataLayoutOpInterface::Trait> {
     return getOperation()->getAttrOfType<DataLayoutSpecInterface>(kAttrName);
   }
 
+  TargetSystemDescSpecInterface getTargetSystemDescSpec() {
+    return getOperation()->getAttrOfType<TargetSystemDescSpecInterface>(
+        kAttrName);
+  }
+
   static llvm::TypeSize getTypeSizeInBits(Type type,
                                           const DataLayout &dataLayout,
                                           DataLayoutEntryListRef params) {
@@ -244,6 +249,11 @@ struct OpWith7BitByte
     return getOperation()->getAttrOfType<DataLayoutSpecInterface>(kAttrName);
   }
 
+  TargetSystemDescSpecInterface getTargetSystemDescSpec() {
+    return getOperation()->getAttrOfType<TargetSystemDescSpecInterface>(
+        kAttrName);
+  }
+
   // Bytes are assumed to be 7-bit here.
   static llvm::TypeSize getTypeSize(Type type, const DataLayout &dataLayout,
                                     DataLayoutEntryListRef params) {

>From ccd436f80e6bcfacda9887b0226671811cd29de7 Mon Sep 17 00:00:00 2001
From: Niranjan Hasabnis <niranjan.hasabnis at intel.com>
Date: Fri, 17 May 2024 04:44:49 -0700
Subject: [PATCH 2/7] Addressing review comments

1. Use ODS framework for all of DLTI attrs
2. Removing need of MLIRContext in APIs
3. Removing canonicalizer heuristics from this PR
---
 mlir/include/mlir/Dialect/DLTI/CMakeLists.txt |   6 +
 mlir/include/mlir/Dialect/DLTI/DLTI.h         | 257 +------------
 mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td   | 303 +++++++++++++++
 mlir/include/mlir/Dialect/DLTI/DLTIBase.td    |  46 +--
 .../mlir/Interfaces/DataLayoutInterfaces.h    |  26 +-
 .../mlir/Interfaces/DataLayoutInterfaces.td   |  70 +---
 .../AMDGPUToROCDL/AMDGPUToROCDL.cpp           |   7 +-
 mlir/lib/Dialect/DLTI/DLTI.cpp                | 360 +++---------------
 mlir/lib/Interfaces/DataLayoutInterfaces.cpp  |  78 +---
 mlir/lib/Transforms/Canonicalizer.cpp         |  49 ---
 10 files changed, 388 insertions(+), 814 deletions(-)
 create mode 100644 mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td

diff --git a/mlir/include/mlir/Dialect/DLTI/CMakeLists.txt b/mlir/include/mlir/Dialect/DLTI/CMakeLists.txt
index e0b18b12cda34..44a814f1c8e82 100644
--- a/mlir/include/mlir/Dialect/DLTI/CMakeLists.txt
+++ b/mlir/include/mlir/Dialect/DLTI/CMakeLists.txt
@@ -1,2 +1,8 @@
 add_mlir_dialect(DLTI dlti)
 add_mlir_doc(DLTI DLTIDialect Dialects/ -gen-dialect-doc)
+
+set(LLVM_TARGET_DEFINITIONS DLTIAttrs.td)
+mlir_tablegen(DLTIAttrs.h.inc -gen-attrdef-decls -attrdefs-dialect=dlti)
+mlir_tablegen(DLTIAttrs.cpp.inc -gen-attrdef-defs -attrdefs-dialect=dlti)
+add_public_tablegen_target(MLIRDLTIAttrsIncGen)
+add_dependencies(mlir-headers MLIRDLTIAttrsIncGen)
diff --git a/mlir/include/mlir/Dialect/DLTI/DLTI.h b/mlir/include/mlir/Dialect/DLTI/DLTI.h
index f78e8bdc5eb98..f50a654f3885d 100644
--- a/mlir/include/mlir/Dialect/DLTI/DLTI.h
+++ b/mlir/include/mlir/Dialect/DLTI/DLTI.h
@@ -18,260 +18,13 @@
 #include "mlir/Interfaces/DataLayoutInterfaces.h"
 
 namespace mlir {
-namespace impl {
-class DataLayoutEntryStorage;
-class DataLayoutSpecStorage;
-class TargetSystemDescSpecAttrStorage;
-class TargetDeviceDescSpecAttrStorage;
-} // namespace impl
-
-//===----------------------------------------------------------------------===//
-// DataLayoutEntryAttr
-//===----------------------------------------------------------------------===//
-
-/// A data layout entry attribute is a key-value pair where the key is a type or
-/// an identifier and the value is another attribute. These entries form a data
-/// layout specification.
-class DataLayoutEntryAttr
-    : public Attribute::AttrBase<DataLayoutEntryAttr, Attribute,
-                                 impl::DataLayoutEntryStorage,
-                                 DataLayoutEntryInterface::Trait> {
-public:
-  using Base::Base;
-
-  /// The keyword used for this attribute in custom syntax.
-  constexpr const static llvm::StringLiteral kAttrKeyword = "dl_entry";
-
-  /// Returns the entry with the given key and value.
-  static DataLayoutEntryAttr get(StringAttr key, Attribute value);
-  static DataLayoutEntryAttr get(Type key, Attribute value);
-
-  /// Returns the key of this entry.
-  DataLayoutEntryKey getKey() const;
-
-  /// Returns the value of this entry.
-  Attribute getValue() const;
-
-  /// Parses an instance of this attribute.
-  static DataLayoutEntryAttr parse(AsmParser &parser);
-
-  /// Prints this attribute.
-  void print(AsmPrinter &os) const;
-
-  static constexpr StringLiteral name = "builtin.data_layout_entry";
-};
-
-//===----------------------------------------------------------------------===//
-// DataLayoutSpecAttr
-//===----------------------------------------------------------------------===//
-
-/// A data layout specification is a list of entries that specify (partial) data
-/// layout information. It is expected to be attached to operations that serve
-/// as scopes for data layout requests.
-class DataLayoutSpecAttr
-    : public Attribute::AttrBase<DataLayoutSpecAttr, Attribute,
-                                 impl::DataLayoutSpecStorage,
-                                 DataLayoutSpecInterface::Trait> {
-public:
-  using Base::Base;
-
-  /// The keyword used for this attribute in custom syntax.
-  constexpr const static StringLiteral kAttrKeyword = "dl_spec";
-
-  /// Returns the specification containing the given list of keys.
-  static DataLayoutSpecAttr get(MLIRContext *ctx,
-                                ArrayRef<DataLayoutEntryInterface> entries);
-
-  /// Returns the specification containing the given list of keys. If the list
-  /// contains duplicate keys or is otherwise invalid, reports errors using the
-  /// given callback and returns null.
-  static DataLayoutSpecAttr
-  getChecked(function_ref<InFlightDiagnostic()> emitError, MLIRContext *context,
-             ArrayRef<DataLayoutEntryInterface> entries);
-
-  /// Checks that the given list of entries does not contain duplicate keys.
-  static LogicalResult verify(function_ref<InFlightDiagnostic()> emitError,
-                              ArrayRef<DataLayoutEntryInterface> entries);
-
-  /// Combines this specification with `specs`, enclosing specifications listed
-  /// from outermost to innermost. This overwrites the older entries with the
-  /// same key as the newer entries if the entries are compatible. Returns null
-  /// if the specifications are not compatible.
-  DataLayoutSpecAttr combineWith(ArrayRef<DataLayoutSpecInterface> specs) const;
-
-  /// Returns the list of entries.
-  DataLayoutEntryListRef getEntries() const;
-
-  /// Returns the endiannes identifier.
-  StringAttr getEndiannessIdentifier(MLIRContext *context) const;
-
-  /// Returns the alloca memory space identifier.
-  StringAttr getAllocaMemorySpaceIdentifier(MLIRContext *context) const;
-
-  /// Returns the program memory space identifier.
-  StringAttr getProgramMemorySpaceIdentifier(MLIRContext *context) const;
-
-  /// Returns the global memory space identifier.
-  StringAttr getGlobalMemorySpaceIdentifier(MLIRContext *context) const;
-
-  /// Returns the stack alignment identifier.
-  StringAttr getStackAlignmentIdentifier(MLIRContext *context) const;
-
-  /// Parses an instance of this attribute.
-  static DataLayoutSpecAttr parse(AsmParser &parser);
-
-  /// Prints this attribute.
-  void print(AsmPrinter &os) const;
-
-  static constexpr StringLiteral name = "builtin.data_layout_spec";
-};
-
-//===----------------------------------------------------------------------===//
-// TargetSystemDescSpecAttr
-//===----------------------------------------------------------------------===//
-
-/// A system description attribute is a list of device descriptors, each
-/// having a unique device ID
-class TargetSystemDescSpecAttr
-    : public Attribute::AttrBase<TargetSystemDescSpecAttr, Attribute,
-                                 impl::TargetSystemDescSpecAttrStorage,
-                                 TargetSystemDescSpecInterface::Trait> {
-public:
-  using Base::Base;
-
-  /// The keyword used for this attribute in custom syntax.
-  constexpr const static StringLiteral kAttrKeyword = "tsd_spec";
-
-  /// Returns a system descriptor attribute from the given system descriptor
-  static TargetSystemDescSpecAttr
-  get(MLIRContext *context, ArrayRef<TargetDeviceDescSpecInterface> entries);
-
-  /// Returns the list of entries.
-  TargetDeviceDescSpecListRef getEntries() const;
-
-  /// Return the device descriptor that matches the given device ID
-  TargetDeviceDescSpecInterface getDeviceDescForDeviceID(uint32_t deviceID);
-
-  /// Returns the specification containing the given list of keys. If the list
-  /// contains duplicate keys or is otherwise invalid, reports errors using the
-  /// given callback and returns null.
-  static TargetSystemDescSpecAttr
-  getChecked(function_ref<InFlightDiagnostic()> emitError, MLIRContext *context,
-             ArrayRef<TargetDeviceDescSpecInterface> entries);
-
-  /// Checks that the given list of entries does not contain duplicate keys.
-  static LogicalResult verify(function_ref<InFlightDiagnostic()> emitError,
-                              ArrayRef<TargetDeviceDescSpecInterface> entries);
-
-  /// Parses an instance of this attribute.
-  static TargetSystemDescSpecAttr parse(AsmParser &parser);
-
-  /// Prints this attribute.
-  void print(AsmPrinter &os) const;
-
-  static constexpr StringLiteral name = "builtin.target_system_description";
-};
-
-//===----------------------------------------------------------------------===//
-// TargetDeviceDescSpecAttr
-//===----------------------------------------------------------------------===//
-
-class TargetDeviceDescSpecAttr
-    : public Attribute::AttrBase<TargetDeviceDescSpecAttr, Attribute,
-                                 impl::TargetDeviceDescSpecAttrStorage,
-                                 TargetDeviceDescSpecInterface::Trait> {
-public:
-  using Base::Base;
-
-  /// The keyword used for this attribute in custom syntax.
-  constexpr const static StringLiteral kAttrKeyword = "tdd_spec";
-
-  /// Returns a system descriptor attribute from the given system descriptor
-  static TargetDeviceDescSpecAttr
-  get(MLIRContext *context, ArrayRef<DataLayoutEntryInterface> entries);
-
-  /// Returns the specification containing the given list of keys. If the list
-  /// contains duplicate keys or is otherwise invalid, reports errors using the
-  /// given callback and returns null.
-  static TargetDeviceDescSpecAttr
-  getChecked(function_ref<InFlightDiagnostic()> emitError, MLIRContext *context,
-             ArrayRef<DataLayoutEntryInterface> entries);
-
-  /// Checks that the given list of entries does not contain duplicate keys.
-  static LogicalResult verify(function_ref<InFlightDiagnostic()> emitError,
-                              ArrayRef<DataLayoutEntryInterface> entries);
-
-  /// Returns the list of entries.
-  DataLayoutEntryListRef getEntries() const;
-
-  /// Parses an instance of this attribute.
-  static TargetDeviceDescSpecAttr parse(AsmParser &parser);
-
-  /// Prints this attribute.
-  void print(AsmPrinter &os) const;
-
-  /// Returns the device ID identifier.
-  StringAttr getDeviceIDIdentifier(MLIRContext *context);
-
-  /// Returns the device type identifier.
-  StringAttr getDeviceTypeIdentifier(MLIRContext *context);
-
-  /// Returns max vector op width identifier.
-  StringAttr getMaxVectorOpWidthIdentifier(MLIRContext *context);
-
-  /// Returns canonicalizer max iterations identifier.
-  StringAttr getCanonicalizerMaxIterationsIdentifier(MLIRContext *context);
-
-  /// Returns canonicalizer max num rewrites identifier.
-  StringAttr getCanonicalizerMaxNumRewritesIdentifier(MLIRContext *context);
-
-  /// Returns L1 cache size identifier
-  StringAttr getL1CacheSizeInBytesIdentifier(MLIRContext *context);
-
-  /// Returns the interface spec for device ID
-  /// Since we verify that the spec contains device ID the function
-  /// will return a valid spec.
-  DataLayoutEntryInterface getSpecForDeviceID(MLIRContext *context);
-
-  /// Returns the interface spec for device type
-  /// Since we verify that the spec contains device type the function
-  /// will return a valid spec.
-  DataLayoutEntryInterface getSpecForDeviceType(MLIRContext *context);
-
-  /// Returns the interface spec for max vector op width
-  /// Since max vector op width is an optional property, this function will
-  /// return a valid spec if the property is defined, otherwise it
-  /// will return an empty spec.
-  DataLayoutEntryInterface getSpecForMaxVectorOpWidth(MLIRContext *context);
-
-  /// Returns the interface spec for L1 cache size
-  /// Since L1 cache size is an optional property, this function will
-  /// return a valid spec if the property is defined, otherwise it
-  /// will return an empty spec.
-  DataLayoutEntryInterface getSpecForL1CacheSizeInBytes(MLIRContext *context);
-
-  /// Returns the interface spec for canonicalizer max iterations.
-  /// Since this is an optional property, this function will
-  /// return a valid spec if the property is defined, otherwise it
-  /// will return an empty spec.
-  DataLayoutEntryInterface
-  getSpecForCanonicalizerMaxIterations(MLIRContext *context);
-
-  /// Returns the interface spec for canonicalizer max num rewrites.
-  /// Since this is an optional property, this function will
-  /// return a valid spec if the property is defined, otherwise it
-  /// will return an empty spec.
-  DataLayoutEntryInterface
-  getSpecForCanonicalizerMaxNumRewrites(MLIRContext *context);
-
-  /// Return the value of device ID
-  uint32_t getDeviceID(MLIRContext *context);
-
-  static constexpr StringLiteral name = "builtin.target_device_description";
-};
-
+namespace detail {
+class DataLayoutEntryAttrStorage;
+} // namespace detail
 } // namespace mlir
 
+#define GET_ATTRDEF_CLASSES
+#include "mlir/Dialect/DLTI/DLTIAttrs.h.inc"
 #include "mlir/Dialect/DLTI/DLTIDialect.h.inc"
 
 #endif // MLIR_DIALECT_DLTI_DLTI_H
diff --git a/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td b/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
new file mode 100644
index 0000000000000..b2b3b8cd31d20
--- /dev/null
+++ b/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
@@ -0,0 +1,303 @@
+//===- DLTIAttrs.td - DLTI dialect attributes definition --*- tablegen -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef MLIR_DIALECT_DLTI_DLTIATTRS_TD
+#define MLIR_DIALECT_DLTI_DLTIATTRS_TD
+
+include "mlir/Dialect/DLTI/DLTI.td"
+include "mlir/IR/AttrTypeBase.td"
+
+class DLTIAttr<string name, list<Trait> traits = [],
+                string baseCppClass = "::mlir::Attribute">
+    : AttrDef<DLTI_Dialect, name, traits, baseCppClass> { }
+
+//===----------------------------------------------------------------------===//
+// DataLayoutEntryAttr
+//===----------------------------------------------------------------------===//
+
+def DataLayoutEntryTrait
+    : NativeAttrTrait<"DataLayoutEntryInterface::Trait"> {
+  let cppNamespace = "::mlir";
+}
+
+def DLTI_DataLayoutEntryAttr :
+    DLTIAttr<"DataLayoutEntry", [DataLayoutEntryTrait]> {
+  let summary = [{
+    An attribute to represent an entry of a data layout specification
+  }];
+  let description = [{
+    A data layout entry attribute is a key-value pair where the key is a type or
+    an identifier and the value is another attribute. These entries form a data
+    layout specification.
+  }];
+  let parameters = (ins
+    "DataLayoutEntryKey":$key, "Attribute":$value
+  );
+  // We do not generate storage class because llvm::PointerUnion
+  // does not work with hash_key method.
+  let genStorageClass = 0;
+  let mnemonic = "dl_entry";
+  let genVerifyDecl = 0;
+  let hasCustomAssemblyFormat = 1;
+  let extraClassDeclaration = [{
+    /// Returns the entry with the given key and value.
+    static DataLayoutEntryAttr get(StringAttr key, Attribute value);
+    static DataLayoutEntryAttr get(MLIRContext *context, Type key, Attribute value);
+    static DataLayoutEntryAttr get(Type key, Attribute value);
+  }];
+}
+
+//===----------------------------------------------------------------------===//
+// DataLayoutSpecAttr
+//===----------------------------------------------------------------------===//
+def DataLayoutSpecTrait
+    : NativeAttrTrait<"DataLayoutSpecInterface::Trait"> {
+  let cppNamespace = "::mlir";
+}
+
+def DLTI_DataLayoutSpecAttr :
+    DLTIAttr<"DataLayoutSpec", [DataLayoutSpecTrait]> {
+  let summary = [{An attribute to represent a data layout specification}];
+  let description = [{
+    A data layout specification is a list of entries that specify (partial) data
+    layout information. It is expected to be attached to operations that serve
+    as scopes for data layout requests.
+  }];
+  let parameters = (ins
+    ArrayRefParameter<"DataLayoutEntryInterface", "">:$entries
+  );
+  let mnemonic = "dl_spec";
+  let genVerifyDecl = 1;
+  let hasCustomAssemblyFormat = 1;
+  let extraClassDeclaration = [{
+    /// Combines this specification with `specs`, enclosing specifications listed
+    /// from outermost to innermost. This overwrites the older entries with the
+    /// same key as the newer entries if the entries are compatible. Returns null
+    /// if the specifications are not compatible.
+    DataLayoutSpecAttr combineWith(ArrayRef<DataLayoutSpecInterface> specs) const;
+  
+    /// Returns the endiannes identifier.
+    StringAttr getEndiannessIdentifier(MLIRContext *context) const;
+
+    /// Returns the alloca memory space identifier.
+    StringAttr getAllocaMemorySpaceIdentifier(MLIRContext *context) const;
+
+    /// Returns the program memory space identifier.
+    StringAttr getProgramMemorySpaceIdentifier(MLIRContext *context) const;
+
+    /// Returns the global memory space identifier.
+    StringAttr getGlobalMemorySpaceIdentifier(MLIRContext *context) const;
+
+    /// Returns the stack alignment identifier.
+    StringAttr getStackAlignmentIdentifier(MLIRContext *context) const;
+  }];
+  let extraClassDefinition = [{
+    StringAttr
+    $cppClass::getEndiannessIdentifier(MLIRContext *context) const {
+      return Builder(context).getStringAttr(DLTIDialect::kDataLayoutEndiannessKey);
+    }
+
+    StringAttr
+    $cppClass::getAllocaMemorySpaceIdentifier(MLIRContext *context) const {
+      return Builder(context).getStringAttr(
+          DLTIDialect::kDataLayoutAllocaMemorySpaceKey);
+    }
+
+    StringAttr $cppClass::getProgramMemorySpaceIdentifier(
+        MLIRContext *context) const {
+      return Builder(context).getStringAttr(
+          DLTIDialect::kDataLayoutProgramMemorySpaceKey);
+    }
+
+    StringAttr
+    $cppClass::getGlobalMemorySpaceIdentifier(MLIRContext *context) const {
+      return Builder(context).getStringAttr(
+          DLTIDialect::kDataLayoutGlobalMemorySpaceKey);
+    }
+
+    StringAttr
+    $cppClass::getStackAlignmentIdentifier(MLIRContext *context) const {
+      return Builder(context).getStringAttr(
+          DLTIDialect::kDataLayoutStackAlignmentKey);
+    }
+  }];
+}
+
+//===----------------------------------------------------------------------===//
+// TargetSystemDescSpecAttr
+//===----------------------------------------------------------------------===//
+
+def TargetSystemDescSpecTrait
+    : NativeAttrTrait<"TargetSystemDescSpecInterface::Trait"> {
+  let cppNamespace = "::mlir";
+}
+
+def DLTI_TargetSystemDescSpecAttr :
+    DLTIAttr<"TargetSystemDescSpec", [TargetSystemDescSpecTrait]> {
+  let summary = [{An attribute to represent target system description}];
+  let description = [{
+    A system description specification describes the overall system
+    containing multiple devices, with each device having a unique ID
+    and its corresponding TargetDeviceDescSpec object.
+
+    Example:
+          dlti.target_system_desc_spec =
+            #dlti.target_device_desc_spec<
+              #dlti.dl_entry<"dlti.device_id", 0: ui32>,
+              #dlti.dl_entry<"dlti.device_type", "CPU">>,
+            #dlti.target_device_desc_spec <
+              #dlti.dl_entry<"dlti.device_id", 1: ui32>,
+              #dlti.dl_entry<"dlti.device_type", "GPU">,
+              #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>,
+            #dlti.target_device_desc_spec <
+              #dlti.dl_entry<"dlti.device_id", 2: ui32>,
+              #dlti.dl_entry<"dlti.device_type", "XPU">>>
+  }];
+  let parameters = (ins
+    ArrayRefParameter<"TargetDeviceDescSpecInterface", "">:$entries
+  );
+  let mnemonic = "target_system_desc_spec";
+  let genVerifyDecl = 1;
+  let hasCustomAssemblyFormat = 1;
+  let extraClassDeclaration = [{
+    /// Return the device descriptor that matches the given device ID
+    std::optional<TargetDeviceDescSpecInterface>
+    getDeviceDescForDeviceID(uint32_t deviceID);
+  }];
+  let extraClassDefinition = [{
+    std::optional<TargetDeviceDescSpecInterface>
+    $cppClass::getDeviceDescForDeviceID(
+        TargetDeviceDescSpecInterface::DeviceID DeviceID) {
+      for (TargetDeviceDescSpecInterface entry : getEntries()) {
+        if (entry.getDeviceID() == DeviceID)
+          return entry;
+      }
+      return std::nullopt;
+    }
+  }];
+}
+
+//===----------------------------------------------------------------------===//
+// TargetDeviceDescSpecAttr
+//===----------------------------------------------------------------------===//
+
+def TargetDeviceDescSpecTrait
+    : NativeAttrTrait<"TargetDeviceDescSpecInterface::Trait"> {
+  let cppNamespace = "::mlir";
+}
+
+def DLTI_TargetDeviceDescSpecAttr :
+    DLTIAttr<"TargetDeviceDescSpec", [TargetDeviceDescSpecTrait]> {
+  let summary = [{An attribute to represent target device description}];
+  let description = [{
+        Each device description specification describes a single device and
+        its hardware properties. Each device description must have a device_id
+        and a device_type. In addition, the description can contain any number
+        of optional hardware properties (e.g., max_vector_op_width below).
+
+        Example:
+          #dlti.target_device_desc_spec <
+                #dlti.dl_entry<"dlti.device_id", 1: ui32>,
+                #dlti.dl_entry<"dlti.device_type", "GPU">,
+                #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>
+        }];
+  let parameters = (ins
+    ArrayRefParameter<"DataLayoutEntryInterface", "">:$entries
+  );
+  let mnemonic = "target_device_desc_spec";
+  let genVerifyDecl = 1;
+  let hasCustomAssemblyFormat = 1;
+  let extraClassDeclaration = [{
+    /// Returns the device ID identifier.
+    StringAttr getDeviceIDIdentifier();
+
+    /// Returns the device type identifier.
+    StringAttr getDeviceTypeIdentifier();
+
+    /// Returns max vector op width identifier.
+    StringAttr getMaxVectorOpWidthIdentifier();
+
+    /// Returns L1 cache size identifier
+    StringAttr getL1CacheSizeInBytesIdentifier();
+
+    /// Returns the interface spec for device ID
+    /// Since we verify that the spec contains device ID the function
+    /// will return a valid spec.
+    DataLayoutEntryInterface getSpecForDeviceID();
+
+    /// Returns the interface spec for device type
+    /// Since we verify that the spec contains device type the function
+    /// will return a valid spec.
+    DataLayoutEntryInterface getSpecForDeviceType();
+
+    /// Returns the interface spec for max vector op width
+    /// Since max vector op width is an optional property, this function will
+    /// return a valid spec if the property is defined, otherwise it
+    /// will return an empty spec.
+    DataLayoutEntryInterface getSpecForMaxVectorOpWidth();
+
+    /// Returns the interface spec for L1 cache size
+    /// Since L1 cache size is an optional property, this function will
+    /// return a valid spec if the property is defined, otherwise it
+    /// will return an empty spec.
+    DataLayoutEntryInterface getSpecForL1CacheSizeInBytes();
+
+    /// Return the value of device ID
+    uint32_t getDeviceID();
+  }];
+
+  let extraClassDefinition = [{
+    StringAttr
+    $cppClass::getDeviceIDIdentifier() {
+      return Builder(getContext()).getStringAttr(DLTIDialect::kTargetDeviceIDKey);
+    }
+
+    StringAttr
+    $cppClass::getDeviceTypeIdentifier() {
+      return Builder(getContext()).getStringAttr(DLTIDialect::kTargetDeviceTypeKey);
+    }
+
+    StringAttr
+    $cppClass::getMaxVectorOpWidthIdentifier() {
+      return Builder(getContext()).getStringAttr(
+          DLTIDialect::kTargetDeviceMaxVectorOpWidthKey);
+    }
+
+    StringAttr $cppClass::getL1CacheSizeInBytesIdentifier() {
+      return Builder(getContext()).getStringAttr(
+          DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey);
+    }
+
+    DataLayoutEntryInterface
+    $cppClass::getSpecForDeviceID() {
+      return getSpecForIdentifier(getDeviceIDIdentifier());
+    }
+
+    DataLayoutEntryInterface
+    $cppClass::getSpecForDeviceType() {
+      return getSpecForIdentifier(getDeviceTypeIdentifier());
+    }
+
+    DataLayoutEntryInterface
+    $cppClass::getSpecForMaxVectorOpWidth() {
+      return getSpecForIdentifier(getMaxVectorOpWidthIdentifier());
+    }
+
+    DataLayoutEntryInterface
+    $cppClass::getSpecForL1CacheSizeInBytes() {
+      return getSpecForIdentifier(getL1CacheSizeInBytesIdentifier());
+    }
+
+    uint32_t $cppClass::getDeviceID() {
+      DataLayoutEntryInterface entry = getSpecForDeviceID();
+      return llvm::cast<IntegerAttr>(entry.getValue()).getValue().getZExtValue();
+    }
+  }];
+}
+
+#endif  // MLIR_DIALECT_DLTI_DLTIATTRS_TD
diff --git a/mlir/include/mlir/Dialect/DLTI/DLTIBase.td b/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
index c9a054b3c1e51..61a3d2553d20e 100644
--- a/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
+++ b/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
@@ -29,10 +29,10 @@ def DLTI_Dialect : Dialect {
 
     // Top level attribute name for target system description
     constexpr const static ::llvm::StringLiteral
-    kTargetSystemDescAttrName = "dlti.tsd_spec";
+    kTargetSystemDescAttrName = "dlti.target_system_desc_spec";
 
     constexpr const static ::llvm::StringLiteral
-    kTargetDeviceDescAttrName = "dlti.tdd_spec";
+    kTargetDeviceDescAttrName = "dlti.target_device_desc_spec";
 
     // Constants used in entries.
     constexpr const static ::llvm::StringLiteral
@@ -66,12 +66,6 @@ def DLTI_Dialect : Dialect {
     constexpr const static ::llvm::StringLiteral
     kTargetDeviceMaxVectorOpWidthKey = "dlti.max_vector_op_width";
 
-    constexpr const static ::llvm::StringLiteral
-    kTargetDeviceCanonicalizerMaxIterationsKey = "dlti.canonicalizer_max_iterations";
-
-    constexpr const static ::llvm::StringLiteral
-    kTargetDeviceCanonicalizerMaxNumRewritesKey = "dlti.canonicalizer_max_num_rewrites";
-
     constexpr const static ::llvm::StringLiteral
     kTargetDeviceL1CacheSizeInBytesKey = "dlti.L1_cache_size_in_bytes";
   }];
@@ -79,42 +73,6 @@ def DLTI_Dialect : Dialect {
   let useDefaultAttributePrinterParser = 1;
 }
 
-def DLTI_DataLayoutEntryAttr : DialectAttr<
-    DLTI_Dialect,
-    CPred<"::llvm::isa<::mlir::DataLayoutEntryAttr>($_self)">,
-    "Target data layout entry"> {
-  let storageType = "::mlir::DataLayoutEntryAttr";
-  let returnType = "::mlir::DataLayoutEntryAttr";
-  let convertFromStorage = "$_self";
-}
-
-def DLTI_DataLayoutSpecAttr : DialectAttr<
-    DLTI_Dialect,
-    CPred<"::llvm::isa<::mlir::DataLayoutSpecAttr>($_self)">,
-    "Target data layout specification"> {
-  let storageType = "::mlir::DataLayoutSpecAttr";
-  let returnType = "::mlir::DataLayoutSpecAttr";
-  let convertFromStorage = "$_self";
-}
-
-def DLTI_TargetSystemDescSpecAttr : DialectAttr<
-    DLTI_Dialect,
-    CPred<"::llvm::isa<::mlir::TargetSystemDescSpecAttr>($_self)">,
-    "Target system description part of DLTI"> {
-  let storageType = "::mlir::TargetSystemDescSpecAttr";
-  let returnType = "::mlir::TargetSystemDescSpecAttr";
-  let convertFromStorage = "$_self";
-}
-
-def DLTI_TargetDeviceDescSpecAttr : DialectAttr<
-    DLTI_Dialect,
-    CPred<"::llvm::isa<::mlir::TargetDeviceDescSpecAttr>($_self)">,
-    "Target device description part of DLTI"> {
-  let storageType = "::mlir::TargetDeviceDescSpecAttr";
-  let returnType = "::mlir::TargetDeviceDescSpecAttr";
-  let convertFromStorage = "$_self";
-}
-
 def HasDefaultDLTIDataLayout : NativeOpTrait<"HasDefaultDLTIDataLayout"> {
   let cppNamespace = "::mlir";
 }
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
index 1584a13247dff..625ac2e9367dc 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
@@ -30,8 +30,6 @@ using DataLayoutEntryKey = llvm::PointerUnion<Type, StringAttr>;
 // forward declaration, and we need the typedef in the actual declaration.
 using DataLayoutEntryList = llvm::SmallVector<DataLayoutEntryInterface, 4>;
 using DataLayoutEntryListRef = llvm::ArrayRef<DataLayoutEntryInterface>;
-// using TargetDeviceDescSpecList =
-// llvm::SmallVector<TargetDeviceDescSpecInterface, 4>;
 using TargetDeviceDescSpecListRef =
     llvm::ArrayRef<TargetDeviceDescSpecInterface>;
 class DataLayoutOpInterface;
@@ -90,24 +88,14 @@ Attribute getDefaultGlobalMemorySpace(DataLayoutEntryInterface entry);
 /// DataLayoutInterface if specified, otherwise returns the default.
 uint64_t getDefaultStackAlignment(DataLayoutEntryInterface entry);
 
-/// return max vector op width from the specified DataLayoutEntry. If the
+/// Return max vector op width from the specified DataLayoutEntry. If the
 /// property is missing from the entry, then return std::nullopt.
 std::optional<uint32_t> getMaxVectorOpWidth(DataLayoutEntryInterface entry);
 
-/// return L1 cache size in bytes from the specified DataLayoutEntry. If the
+/// Return L1 cache size in bytes from the specified DataLayoutEntry. If the
 /// property is missing from the entry, then return std::nullopt.
 std::optional<uint32_t> getL1CacheSizeInBytes(DataLayoutEntryInterface entry);
 
-/// return canonicalizer max iterations from the specified DataLayoutEntry.
-/// If the property is missing from the entry, then return std::nullopt.
-std::optional<int64_t>
-getCanonicalizerMaxIterations(DataLayoutEntryInterface entry);
-
-/// returncanonicalizer max num rewrites from the specified DataLayoutEntry.
-/// If the property is missing from the entry, then return std::nullopt.
-std::optional<int64_t>
-getCanonicalizerMaxNumRewrites(DataLayoutEntryInterface entry);
-
 /// Given a list of data layout entries, returns a new list containing the
 /// entries with keys having the given type ID, i.e. belonging to the same type
 /// class.
@@ -266,16 +254,6 @@ class DataLayout {
   std::optional<uint32_t>
       getL1CacheSizeInBytes(TargetDeviceDescSpecInterface::DeviceID) const;
 
-  /// Returns for canonicalizer max iterations if the property is defined for
-  /// the given device ID, otherwise return std::nullopt.
-  std::optional<int64_t> getCanonicalizerMaxIterations(
-      TargetDeviceDescSpecInterface::DeviceID) const;
-
-  /// Returns for canonicalizer max rewrites if the property is defined for
-  /// the given device ID, otherwise return std::nullopt.
-  std::optional<int64_t> getCanonicalizerMaxNumRewrites(
-      TargetDeviceDescSpecInterface::DeviceID) const;
-
 private:
   /// Combined layout spec at the given scope.
   const DataLayoutSpecInterface originalLayout;
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
index 75e609dde8fcf..6547b83080804 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
@@ -242,80 +242,54 @@ def TargetDeviceDescSpecInterface : AttrInterface<"TargetDeviceDescSpecInterface
       /*description=*/"Returns the device ID identifier.",
       /*retTy=*/"::mlir::StringAttr",
       /*methodName=*/"getDeviceIDIdentifier",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
+      /*args=*/(ins)
     >,
     InterfaceMethod<
       /*description=*/"Returns the device type identifier.",
       /*retTy=*/"::mlir::StringAttr",
       /*methodName=*/"getDeviceTypeIdentifier",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
+      /*args=*/(ins)
     >,
     InterfaceMethod<
       /*description=*/"Returns the L1 cache size identifier.",
       /*retTy=*/"::mlir::StringAttr",
       /*methodName=*/"getMaxVectorOpWidthIdentifier",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
-    >,
-    InterfaceMethod<
-      /*description=*/"Returns canonicalizer max iterations identifier.",
-      /*retTy=*/"::mlir::StringAttr",
-      /*methodName=*/"getCanonicalizerMaxIterationsIdentifier",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
-    >,
-    InterfaceMethod<
-      /*description=*/"Returns canonicalizer max num rewrites identifier.",
-      /*retTy=*/"::mlir::StringAttr",
-      /*methodName=*/"getCanonicalizerMaxNumRewritesIdentifier",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
+      /*args=*/(ins)
     >,
     InterfaceMethod<
       /*description=*/"Returns the entry related to Device ID. The function"
                       "will crash if the entry is missing.",
       /*retTy=*/"::mlir::DataLayoutEntryInterface",
       /*methodName=*/"getSpecForDeviceID",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
+      /*args=*/(ins)
     >,
     InterfaceMethod<
       /*description=*/"Returns the entry related to the given identifier. "
                       "The function will crash if the entry is missing.",
       /*retTy=*/"::mlir::DataLayoutEntryInterface",
       /*methodName=*/"getSpecForDeviceType",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
+      /*args=*/(ins)
     >,
     InterfaceMethod<
       /*description=*/"Returns the entry related to the given identifier, if "
                       "present. Otherwise, return empty spec.",
       /*retTy=*/"::mlir::DataLayoutEntryInterface",
       /*methodName=*/"getSpecForMaxVectorOpWidth",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
+      /*args=*/(ins)
     >,
     InterfaceMethod<
       /*description=*/"Returns the entry related to the given identifier, if "
                       "present. Otherwise, return empty spec.",
       /*retTy=*/"::mlir::DataLayoutEntryInterface",
       /*methodName=*/"getSpecForL1CacheSizeInBytes",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
-    >,
-    InterfaceMethod<
-      /*description=*/"Returns the entry related to the given identifier, if "
-                      "present. Otherwise, return empty spec.",
-      /*retTy=*/"::mlir::DataLayoutEntryInterface",
-      /*methodName=*/"getSpecForCanonicalizerMaxIterations",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
-    >,
-    InterfaceMethod<
-      /*description=*/"Returns the entry related to the given identifier, if "
-                      "present. Otherwise, return empty spec.",
-      /*retTy=*/"::mlir::DataLayoutEntryInterface",
-      /*methodName=*/"getSpecForCanonicalizerMaxNumRewrites",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
+      /*args=*/(ins)
     >,
     InterfaceMethod<
       /*description=*/"Returns the entry related to the given identifier, if "
                       "present.",
       /*retTy=*/"uint32_t",
       /*methodName=*/"getDeviceID",
-      /*args=*/(ins "::mlir::MLIRContext *":$context)
+      /*args=*/(ins)
     >,
   ];
 
@@ -344,14 +318,14 @@ def TargetSystemDescSpecInterface : AttrInterface<"TargetSystemDescSpecInterface
   let methods = [
     InterfaceMethod<
       /*description=*/"Returns the list of layout entries.",
-      /*retTy=*/"::mlir::TargetDeviceDescSpecListRef",
+      /*retTy=*/"llvm::ArrayRef<::mlir::TargetDeviceDescSpecInterface>",
       /*methodName=*/"getEntries",
       /*args=*/(ins)
     >,
     InterfaceMethod<
       /*description=*/"Returns the device description spec for given device "
                       "ID",
-      /*retTy=*/"::mlir::TargetDeviceDescSpecInterface",
+      /*retTy=*/"std::optional<::mlir::TargetDeviceDescSpecInterface>",
       /*methodName=*/"getDeviceDescForDeviceID",
       /*args=*/(ins "int":$deviceID)
     >,
@@ -567,29 +541,7 @@ def DataLayoutOpInterface : OpInterface<"DataLayoutOpInterface"> {
       /*defaultImplementation=*/[{
         return ::mlir::detail::getL1CacheSizeInBytes(entry);
       }]
-    >,
-    StaticInterfaceMethod<
-      /*description=*/"Returns the canonicalizer max iterations, if the "
-                      "property is defined. Otherwise, it returns std::nullopt.",
-      /*retTy=*/"std::optional<int64_t>",
-      /*methodName=*/"getCanonicalizerMaxIterations",
-      /*args=*/(ins "::mlir::DataLayoutEntryInterface":$entry),
-      /*methodBody=*/"",
-      /*defaultImplementation=*/[{
-        return ::mlir::detail::getCanonicalizerMaxIterations(entry);
-      }]
-    >,
-    StaticInterfaceMethod<
-      /*description=*/"Returns the canonicalizer max num rewrites, if the "
-                      "property is defined. Otherwise, it returns std::nullopt.",
-      /*retTy=*/"std::optional<int64_t>",
-      /*methodName=*/"getCanonicalizerMaxNumRewrites",
-      /*args=*/(ins "::mlir::DataLayoutEntryInterface":$entry),
-      /*methodBody=*/"",
-      /*defaultImplementation=*/[{
-        return ::mlir::detail::getCanonicalizerMaxNumRewrites(entry);
-      }]
-    >,
+    >
   ];
 
   let verify = [{ return ::mlir::detail::verifyDataLayoutOp($_op); }];
diff --git a/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp b/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp
index 8ff2b2104b998..f3e1f83b56550 100644
--- a/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp
+++ b/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp
@@ -114,9 +114,10 @@ struct RawBufferOpLowering : public ConvertOpToLLVMPattern<GpuOp> {
       uint32_t elemBits = dataVector.getElementTypeBitWidth();
       uint32_t totalBits = elemBits * dataVector.getNumElements();
       uint32_t maxVectorOpWidth = 128; // default value
-      if (std::optional<uint32_t> v =
-              DataLayout(gpuOp->template getParentOfType<mlir::ModuleOp>())
-                  .getMaxVectorOpWidth(1 /* gpu ID*/)) {
+      ModuleOp moduleOp = gpuOp->template getParentOfType<mlir::ModuleOp>();
+      std::optional<uint32_t> v = std::nullopt;
+      if (moduleOp &&
+          (v = DataLayout(moduleOp).getMaxVectorOpWidth(1 /* gpu ID*/))) {
         maxVectorOpWidth = *v;
       }
       LLVM_DEBUG(llvm::dbgs() << "[CostModel] GPU MaxVectorWidth:"
diff --git a/mlir/lib/Dialect/DLTI/DLTI.cpp b/mlir/lib/Dialect/DLTI/DLTI.cpp
index a8518469c7824..9d2865e8152ef 100644
--- a/mlir/lib/Dialect/DLTI/DLTI.cpp
+++ b/mlir/lib/Dialect/DLTI/DLTI.cpp
@@ -28,22 +28,19 @@ using namespace mlir;
 //===----------------------------------------------------------------------===//
 // DataLayoutEntryAttr
 //===----------------------------------------------------------------------===//
-//
-constexpr const StringLiteral mlir::DataLayoutEntryAttr::kAttrKeyword;
-
 namespace mlir {
-namespace impl {
-class DataLayoutEntryStorage : public AttributeStorage {
+namespace detail {
+class DataLayoutEntryAttrStorage : public AttributeStorage {
 public:
   using KeyTy = std::pair<DataLayoutEntryKey, Attribute>;
 
-  DataLayoutEntryStorage(DataLayoutEntryKey entryKey, Attribute value)
+  DataLayoutEntryAttrStorage(DataLayoutEntryKey entryKey, Attribute value)
       : entryKey(entryKey), value(value) {}
 
-  static DataLayoutEntryStorage *construct(AttributeStorageAllocator &allocator,
-                                           const KeyTy &key) {
-    return new (allocator.allocate<DataLayoutEntryStorage>())
-        DataLayoutEntryStorage(key.first, key.second);
+  static DataLayoutEntryAttrStorage *
+  construct(AttributeStorageAllocator &allocator, const KeyTy &key) {
+    return new (allocator.allocate<DataLayoutEntryAttrStorage>())
+        DataLayoutEntryAttrStorage(key.first, key.second);
   }
 
   bool operator==(const KeyTy &other) const {
@@ -53,7 +50,7 @@ class DataLayoutEntryStorage : public AttributeStorage {
   DataLayoutEntryKey entryKey;
   Attribute value;
 };
-} // namespace impl
+} // namespace detail
 } // namespace mlir
 
 DataLayoutEntryAttr DataLayoutEntryAttr::get(StringAttr key, Attribute value) {
@@ -72,7 +69,7 @@ Attribute DataLayoutEntryAttr::getValue() const { return getImpl()->value; }
 
 /// Parses an attribute with syntax:
 ///   attr ::= `#target.` `dl_entry` `<` (type | quoted-string) `,` attr `>`
-DataLayoutEntryAttr DataLayoutEntryAttr::parse(AsmParser &parser) {
+Attribute DataLayoutEntryAttr::parse(AsmParser &parser, Type ty) {
   if (failed(parser.parseLess()))
     return {};
 
@@ -100,7 +97,7 @@ DataLayoutEntryAttr DataLayoutEntryAttr::parse(AsmParser &parser) {
 }
 
 void DataLayoutEntryAttr::print(AsmPrinter &os) const {
-  os << DataLayoutEntryAttr::kAttrKeyword << "<";
+  os << "<";
   if (auto type = llvm::dyn_cast_if_present<Type>(getKey()))
     os << type;
   else
@@ -111,51 +108,6 @@ void DataLayoutEntryAttr::print(AsmPrinter &os) const {
 //===----------------------------------------------------------------------===//
 // DataLayoutSpecAttr
 //===----------------------------------------------------------------------===//
-//
-constexpr const StringLiteral mlir::DataLayoutSpecAttr::kAttrKeyword;
-constexpr const StringLiteral
-    mlir::DLTIDialect::kDataLayoutAllocaMemorySpaceKey;
-constexpr const StringLiteral
-    mlir::DLTIDialect::kDataLayoutProgramMemorySpaceKey;
-constexpr const StringLiteral
-    mlir::DLTIDialect::kDataLayoutGlobalMemorySpaceKey;
-
-constexpr const StringLiteral mlir::DLTIDialect::kDataLayoutStackAlignmentKey;
-
-namespace mlir {
-namespace impl {
-class DataLayoutSpecStorage : public AttributeStorage {
-public:
-  using KeyTy = ArrayRef<DataLayoutEntryInterface>;
-
-  DataLayoutSpecStorage(ArrayRef<DataLayoutEntryInterface> entries)
-      : entries(entries) {}
-
-  bool operator==(const KeyTy &key) const { return key == entries; }
-
-  static DataLayoutSpecStorage *construct(AttributeStorageAllocator &allocator,
-                                          const KeyTy &key) {
-    return new (allocator.allocate<DataLayoutSpecStorage>())
-        DataLayoutSpecStorage(allocator.copyInto(key));
-  }
-
-  ArrayRef<DataLayoutEntryInterface> entries;
-};
-} // namespace impl
-} // namespace mlir
-
-DataLayoutSpecAttr
-DataLayoutSpecAttr::get(MLIRContext *ctx,
-                        ArrayRef<DataLayoutEntryInterface> entries) {
-  return Base::get(ctx, entries);
-}
-
-DataLayoutSpecAttr
-DataLayoutSpecAttr::getChecked(function_ref<InFlightDiagnostic()> emitError,
-                               MLIRContext *context,
-                               ArrayRef<DataLayoutEntryInterface> entries) {
-  return Base::getChecked(emitError, context, entries);
-}
 
 LogicalResult
 DataLayoutSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
@@ -284,43 +236,11 @@ DataLayoutSpecAttr::combineWith(ArrayRef<DataLayoutSpecInterface> specs) const {
   return DataLayoutSpecAttr::get(getContext(), entries);
 }
 
-DataLayoutEntryListRef DataLayoutSpecAttr::getEntries() const {
-  return getImpl()->entries;
-}
-
-StringAttr
-DataLayoutSpecAttr::getEndiannessIdentifier(MLIRContext *context) const {
-  return Builder(context).getStringAttr(DLTIDialect::kDataLayoutEndiannessKey);
-}
-
-StringAttr
-DataLayoutSpecAttr::getAllocaMemorySpaceIdentifier(MLIRContext *context) const {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kDataLayoutAllocaMemorySpaceKey);
-}
-
-StringAttr DataLayoutSpecAttr::getProgramMemorySpaceIdentifier(
-    MLIRContext *context) const {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kDataLayoutProgramMemorySpaceKey);
-}
-
-StringAttr
-DataLayoutSpecAttr::getGlobalMemorySpaceIdentifier(MLIRContext *context) const {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kDataLayoutGlobalMemorySpaceKey);
-}
-StringAttr
-DataLayoutSpecAttr::getStackAlignmentIdentifier(MLIRContext *context) const {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kDataLayoutStackAlignmentKey);
-}
-
 /// Parses an attribute with syntax
 ///   attr ::= `#target.` `dl_spec` `<` attr-list? `>`
 ///   attr-list ::= attr
 ///               | attr `,` attr-list
-DataLayoutSpecAttr DataLayoutSpecAttr::parse(AsmParser &parser) {
+Attribute DataLayoutSpecAttr::parse(AsmParser &parser, Type type) {
   if (failed(parser.parseLess()))
     return {};
 
@@ -339,7 +259,7 @@ DataLayoutSpecAttr DataLayoutSpecAttr::parse(AsmParser &parser) {
 }
 
 void DataLayoutSpecAttr::print(AsmPrinter &os) const {
-  os << DataLayoutSpecAttr::kAttrKeyword << "<";
+  os << "<";
   llvm::interleaveComma(getEntries(), os);
   os << ">";
 }
@@ -347,55 +267,6 @@ void DataLayoutSpecAttr::print(AsmPrinter &os) const {
 //===----------------------------------------------------------------------===//
 // TargetDeviceDescSpecAttr
 //===----------------------------------------------------------------------===//
-constexpr const StringLiteral mlir::TargetDeviceDescSpecAttr::kAttrKeyword;
-
-constexpr const StringLiteral mlir::DLTIDialect::kTargetDeviceIDKey;
-constexpr const StringLiteral mlir::DLTIDialect::kTargetDeviceTypeKey;
-constexpr const StringLiteral
-    mlir::DLTIDialect::kTargetDeviceMaxVectorOpWidthKey;
-constexpr const StringLiteral
-    mlir::DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey;
-constexpr const StringLiteral
-    mlir::DLTIDialect::kTargetDeviceCanonicalizerMaxIterationsKey;
-constexpr const StringLiteral
-    mlir::DLTIDialect::kTargetDeviceCanonicalizerMaxNumRewritesKey;
-
-namespace mlir {
-namespace impl {
-class TargetDeviceDescSpecAttrStorage : public AttributeStorage {
-public:
-  using KeyTy = ArrayRef<DataLayoutEntryInterface>;
-
-  TargetDeviceDescSpecAttrStorage(KeyTy entries) : entries(entries) {}
-
-  bool operator==(const KeyTy &key) const { return key == entries; }
-
-  static TargetDeviceDescSpecAttrStorage *
-  construct(AttributeStorageAllocator &allocator, const KeyTy &key) {
-    return new (allocator.allocate<TargetDeviceDescSpecAttrStorage>())
-        TargetDeviceDescSpecAttrStorage(allocator.copyInto(key));
-  }
-
-  ArrayRef<DataLayoutEntryInterface> entries;
-};
-} // namespace impl
-} // namespace mlir
-
-TargetDeviceDescSpecAttr
-TargetDeviceDescSpecAttr::get(MLIRContext *ctx,
-                              ArrayRef<DataLayoutEntryInterface> entries) {
-  return Base::get(ctx, entries);
-}
-
-DataLayoutEntryListRef TargetDeviceDescSpecAttr::getEntries() const {
-  return getImpl()->entries;
-}
-
-TargetDeviceDescSpecAttr TargetDeviceDescSpecAttr::getChecked(
-    function_ref<InFlightDiagnostic()> emitError, MLIRContext *context,
-    ArrayRef<DataLayoutEntryInterface> entries) {
-  return Base::getChecked(emitError, context, entries);
-}
 
 LogicalResult
 TargetDeviceDescSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
@@ -409,7 +280,7 @@ TargetDeviceDescSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
   for (DataLayoutEntryInterface entry : entries) {
     if (auto type = llvm::dyn_cast_if_present<Type>(entry.getKey())) {
       return emitError()
-             << "dlti.tdd_spec attribute does not allow type as a key: "
+             << "dlti.target_device_desc_spec does not allow type as a key: "
              << type;
     } else {
       auto id = entry.getKey().get<StringAttr>();
@@ -431,18 +302,22 @@ TargetDeviceDescSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
       if (auto value = llvm::dyn_cast<StringAttr>(entry.getValue())) {
         targetDeviceTypeKeyPresentAndValid = true;
       }
+    } else if (entryName != DLTIDialect::kTargetDeviceMaxVectorOpWidthKey &&
+               entryName != DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey) {
+      return emitError() << "unknown target device desc key name: "
+                         << entryName;
     }
   }
 
   // check that both DeviceID and DeviceType are present
   // and are of correct type.
   if (!targetDeviceIDKeyPresentAndValid) {
-    return emitError() << "tdd_spec requires key: "
+    return emitError() << "target_device_desc_spec requires key: "
                        << DLTIDialect::kTargetDeviceIDKey
                        << " and its value of ui32 type";
   }
   if (!targetDeviceTypeKeyPresentAndValid) {
-    return emitError() << "tdd_spec requires key: "
+    return emitError() << "target_device_desc_spec requires key: "
                        << DLTIDialect::kTargetDeviceTypeKey
                        << " and its value of string type";
   }
@@ -451,10 +326,11 @@ TargetDeviceDescSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
 }
 
 /// Parses an attribute with syntax
-///   tdd_spec_attr ::= `#target.` `tdd_spec` `<` dl-entry-attr-list? `>`
+///   target_device_desc_spec_attr ::=
+///      `#target.` `target_device_desc_spec` `<` dl-entry-attr-list? `>`
 ///   dl-entry-attr-list ::= dl-entry-attr
 ///                         | dl-entry-attr `,` dl-entry-attr-list
-TargetDeviceDescSpecAttr TargetDeviceDescSpecAttr::parse(AsmParser &parser) {
+Attribute TargetDeviceDescSpecAttr::parse(AsmParser &parser, Type type) {
   if (failed(parser.parseLess()))
     return {};
 
@@ -473,141 +349,15 @@ TargetDeviceDescSpecAttr TargetDeviceDescSpecAttr::parse(AsmParser &parser) {
 }
 
 void TargetDeviceDescSpecAttr::print(AsmPrinter &os) const {
-  os << TargetDeviceDescSpecAttr::kAttrKeyword << "<";
+  os << "<";
   llvm::interleaveComma(getEntries(), os);
   os << ">";
 }
 
-// ---------------------------------------------------------------------------//
-//                      Support for specific keys
-// ---------------------------------------------------------------------------//
-
-StringAttr
-TargetDeviceDescSpecAttr::getDeviceIDIdentifier(MLIRContext *context) {
-  return Builder(context).getStringAttr(DLTIDialect::kTargetDeviceIDKey);
-}
-
-StringAttr
-TargetDeviceDescSpecAttr::getDeviceTypeIdentifier(MLIRContext *context) {
-  return Builder(context).getStringAttr(DLTIDialect::kTargetDeviceTypeKey);
-}
-
-StringAttr
-TargetDeviceDescSpecAttr::getMaxVectorOpWidthIdentifier(MLIRContext *context) {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kTargetDeviceMaxVectorOpWidthKey);
-}
-
-StringAttr TargetDeviceDescSpecAttr::getL1CacheSizeInBytesIdentifier(
-    MLIRContext *context) {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey);
-}
-
-StringAttr TargetDeviceDescSpecAttr::getCanonicalizerMaxIterationsIdentifier(
-    MLIRContext *context) {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kTargetDeviceCanonicalizerMaxIterationsKey);
-}
-
-StringAttr TargetDeviceDescSpecAttr::getCanonicalizerMaxNumRewritesIdentifier(
-    MLIRContext *context) {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kTargetDeviceCanonicalizerMaxNumRewritesKey);
-}
-
-DataLayoutEntryInterface
-TargetDeviceDescSpecAttr::getSpecForDeviceID(MLIRContext *context) {
-  return getSpecForIdentifier(getDeviceIDIdentifier(context));
-}
-
-DataLayoutEntryInterface
-TargetDeviceDescSpecAttr::getSpecForDeviceType(MLIRContext *context) {
-  return getSpecForIdentifier(getDeviceTypeIdentifier(context));
-}
-
-DataLayoutEntryInterface
-TargetDeviceDescSpecAttr::getSpecForMaxVectorOpWidth(MLIRContext *context) {
-  return getSpecForIdentifier(getMaxVectorOpWidthIdentifier(context));
-}
-
-DataLayoutEntryInterface
-TargetDeviceDescSpecAttr::getSpecForL1CacheSizeInBytes(MLIRContext *context) {
-  return getSpecForIdentifier(getL1CacheSizeInBytesIdentifier(context));
-}
-
-DataLayoutEntryInterface
-TargetDeviceDescSpecAttr::getSpecForCanonicalizerMaxIterations(
-    MLIRContext *context) {
-  return getSpecForIdentifier(getCanonicalizerMaxIterationsIdentifier(context));
-}
-
-DataLayoutEntryInterface
-TargetDeviceDescSpecAttr::getSpecForCanonicalizerMaxNumRewrites(
-    MLIRContext *context) {
-  return getSpecForIdentifier(
-      getCanonicalizerMaxNumRewritesIdentifier(context));
-}
-
-uint32_t TargetDeviceDescSpecAttr::getDeviceID(MLIRContext *context) {
-  DataLayoutEntryInterface entry = getSpecForDeviceID(context);
-  return llvm::cast<IntegerAttr>(entry.getValue()).getValue().getZExtValue();
-}
-
 //===----------------------------------------------------------------------===//
 // TargetSystemDescSpecAttr
 //===----------------------------------------------------------------------===//
 
-constexpr const StringLiteral mlir::TargetSystemDescSpecAttr::kAttrKeyword;
-
-namespace mlir {
-namespace impl {
-class TargetSystemDescSpecAttrStorage : public AttributeStorage {
-public:
-  using KeyTy = ArrayRef<TargetDeviceDescSpecInterface>;
-
-  TargetSystemDescSpecAttrStorage(KeyTy entries) : entries(entries) {}
-
-  bool operator==(const KeyTy &key) const { return key == entries; }
-
-  static TargetSystemDescSpecAttrStorage *
-  construct(AttributeStorageAllocator &allocator, const KeyTy &key) {
-    return new (allocator.allocate<TargetSystemDescSpecAttrStorage>())
-        TargetSystemDescSpecAttrStorage(allocator.copyInto(key));
-  }
-
-  // This could be a map of DeviceID to DeviceDesc for faster lookup.
-  ArrayRef<TargetDeviceDescSpecInterface> entries;
-};
-} // namespace impl
-} // namespace mlir
-
-TargetSystemDescSpecAttr
-TargetSystemDescSpecAttr::get(MLIRContext *context,
-                              ArrayRef<TargetDeviceDescSpecInterface> entries) {
-  return Base::get(context, entries);
-}
-
-TargetDeviceDescSpecListRef TargetSystemDescSpecAttr::getEntries() const {
-  return getImpl()->entries;
-}
-
-TargetDeviceDescSpecInterface
-TargetSystemDescSpecAttr::getDeviceDescForDeviceID(
-    TargetDeviceDescSpecInterface::DeviceID DeviceID) {
-  for (TargetDeviceDescSpecInterface entry : getEntries()) {
-    if (entry.getDeviceID(getContext()) == DeviceID)
-      return entry;
-  }
-  return TargetDeviceDescSpecInterface();
-}
-
-TargetSystemDescSpecAttr TargetSystemDescSpecAttr::getChecked(
-    function_ref<InFlightDiagnostic()> emitError, MLIRContext *context,
-    ArrayRef<TargetDeviceDescSpecInterface> entries) {
-  return Base::getChecked(emitError, context, entries);
-}
-
 LogicalResult TargetSystemDescSpecAttr::verify(
     function_ref<InFlightDiagnostic()> emitError,
     ArrayRef<TargetDeviceDescSpecInterface> entries) {
@@ -620,21 +370,24 @@ LogicalResult TargetSystemDescSpecAttr::verify(
       return failure();
 
     // Check that device IDs are unique across all entries.
-    MLIRContext *context = tdd_spec.getContext();
-    uint32_t device_id = tdd_spec.getDeviceID(context);
+    uint32_t device_id = tdd_spec.getDeviceID();
     if (!device_ids.insert(device_id).second) {
-      return emitError() << "repeated Device ID in dlti.tsd_spec: "
-                         << device_id;
+      return emitError()
+             << "repeated Device ID in dlti.target_system_desc_spec: "
+             << device_id;
     }
   }
   return success();
 }
 
 /// Parses an attribute with syntax
-///   attr ::= `#target.` `tsd_spec` `<` tdd-spec-attr-list? `>`
-///   tdd-spec-attr-list ::= tdd_spec
-///                         | tdd_spec `,` tdd_spec_attr_list
-TargetSystemDescSpecAttr TargetSystemDescSpecAttr::parse(AsmParser &parser) {
+///   attr ::=
+///     `#target.` `target_system_desc_spec` `<`
+///     target-device-desc-spec-attr-list? `>`
+///   target-device-desc-spec-attr-list ::= target_device_desc_spec
+///                                     | target_device_desc_spec `,`
+///                                       target-device-desc-spec-attr-list
+Attribute TargetSystemDescSpecAttr::parse(AsmParser &parser, Type type) {
   if (failed(parser.parseLess()))
     return {};
 
@@ -653,11 +406,14 @@ TargetSystemDescSpecAttr TargetSystemDescSpecAttr::parse(AsmParser &parser) {
 }
 
 void TargetSystemDescSpecAttr::print(AsmPrinter &os) const {
-  os << TargetSystemDescSpecAttr::kAttrKeyword << "<";
+  os << "<";
   llvm::interleaveComma(getEntries(), os);
   os << ">";
 }
 
+#define GET_ATTRDEF_CLASSES
+#include <mlir/Dialect/DLTI/DLTIAttrs.cpp.inc>
+
 //===----------------------------------------------------------------------===//
 // DLTIDialect
 //===----------------------------------------------------------------------===//
@@ -711,10 +467,7 @@ class SystemDescSpecInterface : public DataLayoutDialectInterface {
       if (entryName != DLTIDialect::kTargetDeviceIDKey &&
           entryName != DLTIDialect::kTargetDeviceTypeKey &&
           entryName != DLTIDialect::kTargetDeviceMaxVectorOpWidthKey &&
-          entryName != DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey &&
-          entryName !=
-              DLTIDialect::kTargetDeviceCanonicalizerMaxIterationsKey &&
-          entryName != DLTIDialect::kTargetDeviceCanonicalizerMaxNumRewritesKey)
+          entryName != DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey)
         return emitError(loc) << "unknown target desc key name: " << entryName;
     }
     return success();
@@ -723,38 +476,13 @@ class SystemDescSpecInterface : public DataLayoutDialectInterface {
 } // namespace
 
 void DLTIDialect::initialize() {
-  addAttributes<DataLayoutEntryAttr, DataLayoutSpecAttr,
-                TargetSystemDescSpecAttr, TargetDeviceDescSpecAttr>();
+  addAttributes<
+#define GET_ATTRDEF_LIST
+#include <mlir/Dialect/DLTI/DLTIAttrs.cpp.inc>
+      >();
   addInterfaces<TargetDataLayoutInterface, SystemDescSpecInterface>();
 }
 
-Attribute DLTIDialect::parseAttribute(DialectAsmParser &parser,
-                                      Type type) const {
-  StringRef attrKind;
-  if (parser.parseKeyword(&attrKind))
-    return {};
-
-  if (attrKind == DataLayoutEntryAttr::kAttrKeyword)
-    return DataLayoutEntryAttr::parse(parser);
-  if (attrKind == DataLayoutSpecAttr::kAttrKeyword)
-    return DataLayoutSpecAttr::parse(parser);
-  if (attrKind == TargetSystemDescSpecAttr::kAttrKeyword)
-    return TargetSystemDescSpecAttr::parse(parser);
-  if (attrKind == TargetDeviceDescSpecAttr::kAttrKeyword)
-    return TargetDeviceDescSpecAttr::parse(parser);
-
-  parser.emitError(parser.getNameLoc(), "unknown attrribute type: ")
-      << attrKind;
-  return {};
-}
-
-void DLTIDialect::printAttribute(Attribute attr, DialectAsmPrinter &os) const {
-  llvm::TypeSwitch<Attribute>(attr)
-      .Case<DataLayoutEntryAttr, DataLayoutSpecAttr, TargetSystemDescSpecAttr,
-            TargetDeviceDescSpecAttr>([&](auto a) { a.print(os); })
-      .Default([](Attribute) { llvm_unreachable("unknown attribute kind"); });
-}
-
 LogicalResult DLTIDialect::verifyOperationAttribute(Operation *op,
                                                     NamedAttribute attr) {
   if (attr.getName() == DLTIDialect::kDataLayoutAttrName) {
@@ -769,7 +497,7 @@ LogicalResult DLTIDialect::verifyOperationAttribute(Operation *op,
     if (!llvm::isa<TargetSystemDescSpecAttr>(attr.getValue())) {
       return op->emitError()
              << "'" << DLTIDialect::kTargetSystemDescAttrName
-             << "' is expected to be a #dlti.tsd_spec attribute";
+             << "' is expected to be a #dlti.target_system_desc_spec attribute";
     }
     return success();
   }
diff --git a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
index 857ccf03ed8c0..19a662b3793ba 100644
--- a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
+++ b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
@@ -315,28 +315,6 @@ mlir::detail::getL1CacheSizeInBytes(DataLayoutEntryInterface entry) {
   return value.getValue().getZExtValue();
 }
 
-// Returns the canonicalizer max iterations if specified in the given entry.
-// If the entry is empty (meaning the spec is missing), returns std::nullopt.
-std::optional<int64_t>
-mlir::detail::getCanonicalizerMaxIterations(DataLayoutEntryInterface entry) {
-  if (entry == DataLayoutEntryInterface())
-    return std::nullopt;
-
-  auto value = cast<IntegerAttr>(entry.getValue());
-  return value.getValue().getSExtValue();
-}
-
-// Returns the canonicalizer max num rewrites if specified in the given entry.
-// If the entry is empty (meaning the spec is missing), returns std::nullopt.
-std::optional<int64_t>
-mlir::detail::getCanonicalizerMaxNumRewrites(DataLayoutEntryInterface entry) {
-  if (entry == DataLayoutEntryInterface())
-    return std::nullopt;
-
-  auto value = cast<IntegerAttr>(entry.getValue());
-  return value.getValue().getSExtValue();
-}
-
 DataLayoutEntryList
 mlir::detail::filterEntriesForType(DataLayoutEntryListRef entries,
                                    TypeID typeID) {
@@ -704,10 +682,11 @@ std::optional<uint32_t> mlir::DataLayout::getMaxVectorOpWidth(
     TargetDeviceDescSpecInterface::DeviceID deviceID) const {
   checkValid();
   DataLayoutEntryInterface entry;
-  if (originalTargetSystemDesc)
-    entry =
-        originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID)
-            .getSpecForMaxVectorOpWidth(originalTargetSystemDesc.getContext());
+  if (originalTargetSystemDesc) {
+    if (auto device =
+            originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID))
+      entry = device->getSpecForMaxVectorOpWidth();
+  }
   // Currently I am not caching the results because we do not return
   // default values of these properties. Instead if the property is
   // missing, we return std::nullopt so that the users can resort to
@@ -722,10 +701,11 @@ std::optional<uint32_t> mlir::DataLayout::getL1CacheSizeInBytes(
     TargetDeviceDescSpecInterface::DeviceID deviceID) const {
   checkValid();
   DataLayoutEntryInterface entry;
-  if (originalTargetSystemDesc)
-    entry = originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID)
-                .getSpecForL1CacheSizeInBytes(
-                    originalTargetSystemDesc.getContext());
+  if (originalTargetSystemDesc) {
+    if (auto device =
+            originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID))
+      entry = device->getSpecForL1CacheSizeInBytes();
+  }
   // Currently I am not caching the results because we do not return
   // default values of these properties. Instead if the property is
   // missing, we return std::nullopt so that the users can resort to
@@ -736,42 +716,6 @@ std::optional<uint32_t> mlir::DataLayout::getL1CacheSizeInBytes(
     return detail::getL1CacheSizeInBytes(entry);
 }
 
-std::optional<int64_t> mlir::DataLayout::getCanonicalizerMaxIterations(
-    TargetDeviceDescSpecInterface::DeviceID deviceID) const {
-  checkValid();
-  DataLayoutEntryInterface entry;
-  if (originalTargetSystemDesc)
-    entry = originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID)
-                .getSpecForCanonicalizerMaxIterations(
-                    originalTargetSystemDesc.getContext());
-  // Currently I am not caching the results because we do not return
-  // default values of these properties. Instead if the property is
-  // missing, we return std::nullopt so that the users can resort to
-  // the default value however they want.
-  if (auto iface = dyn_cast_or_null<DataLayoutOpInterface>(scope))
-    return iface.getCanonicalizerMaxIterations(entry);
-  else
-    return detail::getCanonicalizerMaxIterations(entry);
-}
-
-std::optional<int64_t> mlir::DataLayout::getCanonicalizerMaxNumRewrites(
-    TargetDeviceDescSpecInterface::DeviceID deviceID) const {
-  checkValid();
-  DataLayoutEntryInterface entry;
-  if (originalTargetSystemDesc)
-    entry = originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID)
-                .getSpecForCanonicalizerMaxNumRewrites(
-                    originalTargetSystemDesc.getContext());
-  // Currently I am not caching the results because we do not return
-  // default values of these properties. Instead if the property is
-  // missing, we return std::nullopt so that the users can resort to
-  // the default value however they want.
-  if (auto iface = dyn_cast_or_null<DataLayoutOpInterface>(scope))
-    return iface.getCanonicalizerMaxNumRewrites(entry);
-  else
-    return detail::getCanonicalizerMaxNumRewrites(entry);
-}
-
 //===----------------------------------------------------------------------===//
 // DataLayoutSpecInterface
 //===----------------------------------------------------------------------===//
@@ -888,7 +832,7 @@ mlir::detail::verifyTargetSystemDescSpec(TargetSystemDescSpecInterface spec,
 
     // Check that device IDs are unique across all entries.
     MLIRContext *context = tdd_spec.getContext();
-    uint32_t device_id = tdd_spec.getDeviceID(context);
+    uint32_t device_id = tdd_spec.getDeviceID();
     if (!device_ids.insert(device_id).second) {
       return failure();
     }
diff --git a/mlir/lib/Transforms/Canonicalizer.cpp b/mlir/lib/Transforms/Canonicalizer.cpp
index 2948804b8f92a..1a66f14bc606c 100644
--- a/mlir/lib/Transforms/Canonicalizer.cpp
+++ b/mlir/lib/Transforms/Canonicalizer.cpp
@@ -50,20 +50,6 @@ struct Canonicalizer : public impl::CanonicalizerBase<Canonicalizer> {
     config.maxIterations = maxIterations;
     config.maxNumRewrites = maxNumRewrites;
 
-    LLVM_DEBUG(llvm::dbgs()
-               << "[CostModel] Canonicalizer MaxIterations (default):"
-               << config.maxIterations << "\n");
-    LLVM_DEBUG(llvm::dbgs()
-               << "[CostModel] Canonicalizer MaxNumRewrites (default):"
-               << config.maxNumRewrites << "\n");
-
-    LLVM_DEBUG(llvm::dbgs()
-               << "[CostModel] Canonicalizer MaxIterations (default):"
-               << config.maxIterations << "\n");
-    LLVM_DEBUG(llvm::dbgs()
-               << "[CostModel] Canonicalizer MaxNumRewrites (default):"
-               << config.maxNumRewrites << "\n");
-
     RewritePatternSet owningPatterns(context);
     for (auto *dialect : context->getLoadedDialects())
       dialect->getCanonicalizationPatterns(owningPatterns);
@@ -75,41 +61,6 @@ struct Canonicalizer : public impl::CanonicalizerBase<Canonicalizer> {
     return success();
   }
   void runOnOperation() override {
-    Operation *op = getOperation();
-    uint32_t cpuID = 0;
-
-    if (isa<ModuleOp>(op)) {
-      if (std::optional<int64_t> v =
-              DataLayout(llvm::dyn_cast<ModuleOp>(*op))
-                  .getCanonicalizerMaxIterations(cpuID)) {
-        config.maxIterations = *v;
-      }
-    } else {
-      ModuleOp moduleOp = op->getParentOfType<ModuleOp>();
-      if (std::optional<int64_t> v =
-              DataLayout(moduleOp).getCanonicalizerMaxIterations(cpuID)) {
-        config.maxIterations = *v;
-      }
-    }
-
-    if (isa<ModuleOp>(op)) {
-      if (std::optional<int64_t> v =
-              DataLayout(llvm::dyn_cast<ModuleOp>(*op))
-                  .getCanonicalizerMaxNumRewrites(cpuID)) {
-        config.maxNumRewrites = *v;
-      }
-    } else {
-      ModuleOp moduleOp = op->getParentOfType<ModuleOp>();
-      if (std::optional<int64_t> v =
-              DataLayout(moduleOp).getCanonicalizerMaxNumRewrites(cpuID)) {
-        config.maxNumRewrites = *v;
-      }
-    }
-    LLVM_DEBUG(llvm::dbgs() << "[CostModel] Canonicalizer MaxIterations (new):"
-                            << config.maxIterations << "\n");
-    LLVM_DEBUG(llvm::dbgs() << "[CostModel] Canonicalizer MaxNumRewrites (new):"
-                            << config.maxNumRewrites << "\n");
-
     LogicalResult converged =
         applyPatternsAndFoldGreedily(getOperation(), *patterns, config);
     // Canonicalization is best-effort. Non-convergence is not a pass failure.

>From 9144c519e23db6fe001bb2837812ad2242dd9a39 Mon Sep 17 00:00:00 2001
From: Niranjan Hasabnis <niranjan.hasabnis at intel.com>
Date: Mon, 20 May 2024 09:03:26 -0700
Subject: [PATCH 3/7] Addressing review comments; adding unit tests

---
 mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td   |   4 +-
 .../mlir/Interfaces/DataLayoutInterfaces.td   |   6 +
 .../AMDGPUToROCDL/AMDGPUToROCDL.cpp           |  14 +-
 mlir/lib/Dialect/DLTI/DLTI.cpp                |  17 ++-
 .../Linalg/Transforms/BlockPackMatmul.cpp     |  22 +--
 mlir/lib/Transforms/Canonicalizer.cpp         |   2 -
 mlir/test/Dialect/DLTI/invalid.mlir           | 131 ++++++++++++++++-
 mlir/test/Dialect/DLTI/roundtrip.mlir         |  26 ++++
 mlir/test/Dialect/DLTI/valid.mlir             | 101 +++++++++++++
 .../Interfaces/DataLayoutInterfacesTest.cpp   | 138 +++++++++++++++++-
 10 files changed, 418 insertions(+), 43 deletions(-)
 create mode 100644 mlir/test/Dialect/DLTI/valid.mlir

diff --git a/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td b/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
index b2b3b8cd31d20..7f915b7a015a6 100644
--- a/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
+++ b/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
@@ -172,9 +172,9 @@ def DLTI_TargetSystemDescSpecAttr :
   let extraClassDefinition = [{
     std::optional<TargetDeviceDescSpecInterface>
     $cppClass::getDeviceDescForDeviceID(
-        TargetDeviceDescSpecInterface::DeviceID DeviceID) {
+        TargetDeviceDescSpecInterface::DeviceID deviceID) {
       for (TargetDeviceDescSpecInterface entry : getEntries()) {
-        if (entry.getDeviceID() == DeviceID)
+        if (entry.getDeviceID() == deviceID)
           return entry;
       }
       return std::nullopt;
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
index 6547b83080804..5c431097c7e77 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
@@ -253,6 +253,12 @@ def TargetDeviceDescSpecInterface : AttrInterface<"TargetDeviceDescSpecInterface
     InterfaceMethod<
       /*description=*/"Returns the L1 cache size identifier.",
       /*retTy=*/"::mlir::StringAttr",
+      /*methodName=*/"getL1CacheSizeInBytesIdentifier",
+      /*args=*/(ins)
+    >,
+    InterfaceMethod<
+      /*description=*/"Returns the max vector op width identifier.",
+      /*retTy=*/"::mlir::StringAttr",
       /*methodName=*/"getMaxVectorOpWidthIdentifier",
       /*args=*/(ins)
     >,
diff --git a/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp b/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp
index f3e1f83b56550..033e66c6118f3 100644
--- a/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp
+++ b/mlir/lib/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.cpp
@@ -15,7 +15,6 @@
 #include "mlir/Dialect/LLVMIR/LLVMDialect.h"
 #include "mlir/Dialect/LLVMIR/ROCDLDialect.h"
 #include "mlir/IR/BuiltinTypes.h"
-#include "mlir/IR/Operation.h"
 #include "mlir/IR/TypeUtilities.h"
 #include "mlir/Pass/Pass.h"
 
@@ -30,8 +29,6 @@ namespace mlir {
 using namespace mlir;
 using namespace mlir::amdgpu;
 
-#define DEBUG_TYPE "amd-gpu-to-rocdl"
-
 static Value createI32Constant(ConversionPatternRewriter &rewriter,
                                Location loc, int32_t value) {
   Type llvmI32 = rewriter.getI32Type();
@@ -52,6 +49,7 @@ struct RawBufferOpLowering : public ConvertOpToLLVMPattern<GpuOp> {
       : ConvertOpToLLVMPattern<GpuOp>(converter), chipset(chipset) {}
 
   Chipset chipset;
+  static constexpr uint32_t maxVectorOpWidth = 128;
 
   LogicalResult
   matchAndRewrite(GpuOp gpuOp, typename GpuOp::Adaptor adaptor,
@@ -113,16 +111,6 @@ struct RawBufferOpLowering : public ConvertOpToLLVMPattern<GpuOp> {
     if (auto dataVector = dyn_cast<VectorType>(wantedDataType)) {
       uint32_t elemBits = dataVector.getElementTypeBitWidth();
       uint32_t totalBits = elemBits * dataVector.getNumElements();
-      uint32_t maxVectorOpWidth = 128; // default value
-      ModuleOp moduleOp = gpuOp->template getParentOfType<mlir::ModuleOp>();
-      std::optional<uint32_t> v = std::nullopt;
-      if (moduleOp &&
-          (v = DataLayout(moduleOp).getMaxVectorOpWidth(1 /* gpu ID*/))) {
-        maxVectorOpWidth = *v;
-      }
-      LLVM_DEBUG(llvm::dbgs() << "[CostModel] GPU MaxVectorWidth:"
-                              << maxVectorOpWidth << "\n");
-
       if (totalBits > maxVectorOpWidth)
         return gpuOp.emitOpError(
             "Total width of loads or stores must be no more than " +
diff --git a/mlir/lib/Dialect/DLTI/DLTI.cpp b/mlir/lib/Dialect/DLTI/DLTI.cpp
index 9d2865e8152ef..fe2b18b966c6b 100644
--- a/mlir/lib/Dialect/DLTI/DLTI.cpp
+++ b/mlir/lib/Dialect/DLTI/DLTI.cpp
@@ -302,8 +302,21 @@ TargetDeviceDescSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
       if (auto value = llvm::dyn_cast<StringAttr>(entry.getValue())) {
         targetDeviceTypeKeyPresentAndValid = true;
       }
-    } else if (entryName != DLTIDialect::kTargetDeviceMaxVectorOpWidthKey &&
-               entryName != DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey) {
+    } else if (entryName == DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey) {
+      IntegerAttr value =
+          llvm::dyn_cast_if_present<IntegerAttr>(entry.getValue());
+      if (!value || !value.getType().isUnsignedInteger(32))
+        return emitError() << "target_device_desc_spec requires value of key: "
+                           << DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey
+                           << " to be of ui32 type";
+    } else if (entryName == DLTIDialect::kTargetDeviceMaxVectorOpWidthKey) {
+      IntegerAttr value =
+          llvm::dyn_cast_if_present<IntegerAttr>(entry.getValue());
+      if (!value || !value.getType().isUnsignedInteger(32))
+        return emitError() << "target_device_desc_spec requires value of key: "
+                           << DLTIDialect::kTargetDeviceMaxVectorOpWidthKey
+                           << " to be of ui32 type";
+    } else {
       return emitError() << "unknown target device desc key name: "
                          << entryName;
     }
diff --git a/mlir/lib/Dialect/Linalg/Transforms/BlockPackMatmul.cpp b/mlir/lib/Dialect/Linalg/Transforms/BlockPackMatmul.cpp
index c08224f7af54e..91d4efa3372b7 100644
--- a/mlir/lib/Dialect/Linalg/Transforms/BlockPackMatmul.cpp
+++ b/mlir/lib/Dialect/Linalg/Transforms/BlockPackMatmul.cpp
@@ -18,8 +18,6 @@
 
 #include <optional>
 
-#define DEBUG_TYPE "block-pack-matmul"
-
 namespace mlir {
 #define GEN_PASS_DEF_LINALGBLOCKPACKMATMUL
 #include "mlir/Dialect/Linalg/Passes.h.inc"
@@ -136,24 +134,6 @@ transposePackedMatmul(RewriterBase &rewriter, linalg::LinalgOp linalgOp,
   return packTransposedMatmul;
 }
 
-static SmallVector<int64_t> getDefaultBlockFactors(linalg::LinalgOp linalgOp) {
-  // get L1 cache size first.
-  uint32_t L1_cache_size = 4096; // default value
-  uint32_t cpuID = 0;
-  ModuleOp moduleOp = linalgOp->getParentOfType<ModuleOp>();
-  if (std::optional<int64_t> v =
-          DataLayout(moduleOp).getL1CacheSizeInBytes(cpuID)) {
-    L1_cache_size = *v;
-  }
-
-  // block_size = sqrt(L1_cache_size) rounded down to nearest power of 2.
-  int64_t block_size =
-      std::pow(2, std::floor(std::log2(std::sqrt(L1_cache_size))));
-  // we use same block size for all dims.
-  LLVM_DEBUG(llvm::dbgs() << "block_size:" << block_size << "\n");
-  return {block_size, block_size, block_size};
-}
-
 /// Pack a matmul operation into blocked 4D layout.
 FailureOr<PackResult>
 linalg::blockPackMatmul(RewriterBase &rewriter, linalg::LinalgOp linalgOp,
@@ -166,7 +146,7 @@ linalg::blockPackMatmul(RewriterBase &rewriter, linalg::LinalgOp linalgOp,
     return rewriter.notifyMatchFailure(linalgOp, "invalid packing options");
 
   if (options->blockFactors.size() != 3)
-    options->blockFactors = getDefaultBlockFactors(linalgOp);
+    return rewriter.notifyMatchFailure(linalgOp, "require 3 tile factors");
 
   SmallVector<OpFoldResult> mnkTiles =
       getAsOpFoldResult(rewriter.getI64ArrayAttr(options->blockFactors));
diff --git a/mlir/lib/Transforms/Canonicalizer.cpp b/mlir/lib/Transforms/Canonicalizer.cpp
index 1a66f14bc606c..d50019bd6aee5 100644
--- a/mlir/lib/Transforms/Canonicalizer.cpp
+++ b/mlir/lib/Transforms/Canonicalizer.cpp
@@ -23,8 +23,6 @@ namespace mlir {
 
 using namespace mlir;
 
-#define DEBUG_TYPE "canonicalizer"
-
 namespace {
 /// Canonicalize operations in nested regions.
 struct Canonicalizer : public impl::CanonicalizerBase<Canonicalizer> {
diff --git a/mlir/test/Dialect/DLTI/invalid.mlir b/mlir/test/Dialect/DLTI/invalid.mlir
index 465ec72106f70..7810c659f3158 100644
--- a/mlir/test/Dialect/DLTI/invalid.mlir
+++ b/mlir/test/Dialect/DLTI/invalid.mlir
@@ -36,7 +36,7 @@
 
 // -----
 
-// expected-error at below {{unknown attrribute type: unknown}}
+// expected-error at below {{unknown attribute `unknown` in dialect `dlti`}}
 "test.unknown_op"() { test.unknown_attr = #dlti.unknown } : () -> ()
 
 // -----
@@ -90,3 +90,132 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<#dlti.dl_entry<"unknown.unknown
   // expected-note at above {{enclosing op with data layout}}
   "test.op_with_data_layout"() { dlti.dl_spec = #dlti.dl_spec<#dlti.dl_entry<"unknown.unknown", 32>>} : () -> ()
 }
+
+// -----
+
+// expected-error at below {{'dlti.target_system_desc_spec' is expected to be a #dlti.target_system_desc_spec attribute}}
+"test.unknown_op"() { dlti.target_system_desc_spec = 42 } : () -> ()
+
+// -----
+
+// expected-error at below {{invalid kind of attribute specified}}
+"test.unknown_op"() { dlti.target_system_desc_spec = #dlti.target_system_desc_spec<[]> } : () -> ()
+
+// -----
+
+module attributes {
+  // expected-error at +2 {{target_device_desc_spec requires key: dlti.device_id and its value of ui32 type}}
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_type", "CPU">> 
+  >} {}
+
+// -----
+
+module attributes {
+  // expected-error at +2 {{target_device_desc_spec requires key: dlti.device_type and its value of string type}}
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0: ui32>> 
+  >} {}
+
+// -----
+
+module attributes {
+  // expected-error at +2 {{target_device_desc_spec requires key: dlti.device_id and its value of ui32 type}}
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0: i32>> 
+  >} {}
+
+// -----
+
+module attributes {
+  // expected-error at +2 {{target_device_desc_spec requires key: dlti.device_type and its value of string type}}
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+      #dlti.dl_entry<"dlti.device_type", 0: i32>> 
+  >} {}
+
+// -----
+
+module attributes {
+  // expected-error at +2 {{repeated layout entry key: dlti.device_id}}
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">,
+      #dlti.dl_entry<"dlti.L1_cache_size", 4096 : i32>>
+  >} {}
+
+// -----
+
+module attributes {
+  // expected-error at +2 {{repeated layout entry key: dlti.device_type}}
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">,
+      #dlti.dl_entry<"dlti.device_type", "GPU">,
+      #dlti.dl_entry<"dlti.L1_cache_size", 4096 : i32>>
+  >} {}
+
+// -----
+
+module attributes {
+  // expected-error at +2 {{target_device_desc_spec requires value of key: dlti.L1_cache_size_in_bytes to be of ui32 type}}
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">,
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096.1 : f32>>
+  >} {}
+
+// -----
+
+module attributes {
+  // expected-error at +2 {{target_device_desc_spec requires value of key: dlti.max_vector_op_width to be of ui32 type}}
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">,
+      #dlti.dl_entry<"dlti.max_vector_op_width", 4096.1 : f32>>
+  >} {}
+
+// -----
+
+module attributes {
+  // expected-error at +2 {{unknown target device desc key name: dlti.L2_cache_size_in_bytes}}
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">,
+      #dlti.dl_entry<"dlti.L2_cache_size_in_bytes", 4096 : i32>>
+  >} {}
+
+// -----
+
+module attributes {
+  // expected-error at +2 {{unknown target device desc key name: dlti.unknown_key}}
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">,
+      #dlti.dl_entry<"dlti.unknown_key", 42>>
+  >} {}
+
+// -----
+
+module attributes {
+  // unexpected-error at below {{repeated Device ID in dlti.target_system_desc_spec: 0}}
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">>,
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">>
+  >} {}
+  
\ No newline at end of file
diff --git a/mlir/test/Dialect/DLTI/roundtrip.mlir b/mlir/test/Dialect/DLTI/roundtrip.mlir
index 613dc354d895d..80330273b8de6 100644
--- a/mlir/test/Dialect/DLTI/roundtrip.mlir
+++ b/mlir/test/Dialect/DLTI/roundtrip.mlir
@@ -53,3 +53,29 @@
   }) { dlti.dl_spec = #dlti.dl_spec<#dlti.dl_entry<"unknown.unknown", 32>> } : () -> ()
   "test.maybe_terminator_op"() : () -> ()
 }) { dlti.dl_spec = #dlti.dl_spec<#dlti.dl_entry<"unknown.unknown", 32>> } : () -> ()
+
+// A valid target system description
+// CHECK: module attributes {
+// CHECK-SAME: dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+// CHECK-SAME:  #dlti.target_device_desc_spec<
+// CHECK-SAME:   #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+// CHECK-SAME:   #dlti.dl_entry<"dlti.device_type", "CPU">,
+// CHECK-SAME:   #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
+// CHECK-SAME: #dlti.target_device_desc_spec<
+// CHECK-SAME:  #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
+// CHECK-SAME:  #dlti.dl_entry<"dlti.device_type", "GPU">,
+// CHECK-SAME:  #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
+// CHECK-SAME: >} {
+// CHECK: }
+module attributes {
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">,
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 1: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "GPU">,
+      #dlti.dl_entry<"dlti.max_vector_op_width", 128: ui32>>
+  >} {}
+  
\ No newline at end of file
diff --git a/mlir/test/Dialect/DLTI/valid.mlir b/mlir/test/Dialect/DLTI/valid.mlir
new file mode 100644
index 0000000000000..8f44e9568bc5d
--- /dev/null
+++ b/mlir/test/Dialect/DLTI/valid.mlir
@@ -0,0 +1,101 @@
+// RUN: mlir-opt -split-input-file %s | FileCheck %s
+
+// -----
+
+// CHECK:      module attributes {
+// CHECK-SAME:  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">>,
+// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">>
+// CHECK-SAME:  >} {
+// CHECK:        }
+module attributes {
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">>,
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 1: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "GPU">>
+  >} {}
+
+// -----
+
+// CHECK:      module attributes {
+// CHECK-SAME:  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
+// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
+// CHECK-SAME:  >} {
+// CHECK:        }
+module attributes {
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">,
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 1: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "GPU">,
+      #dlti.dl_entry<"dlti.max_vector_op_width", 128: ui32>>
+  >} {}
+
+// -----
+
+// CHECK:      module attributes {
+// CHECK-SAME:  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
+// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192 : ui32>>
+// CHECK-SAME:  >} {
+// CHECK:        }
+module attributes {
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">,
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 1: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "GPU">,
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192: ui32>>
+  >} {}
+
+// -----
+
+// CHECK:      module attributes {
+// CHECK-SAME:  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>,
+// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
+// CHECK-SAME:  >} {
+// CHECK:        }
+module attributes {
+  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "CPU">,
+      #dlti.dl_entry<"dlti.max_vector_op_width", 64: ui32>>,
+    #dlti.target_device_desc_spec<
+      #dlti.dl_entry<"dlti.device_id", 1: ui32>,
+      #dlti.dl_entry<"dlti.device_type", "GPU">,
+      #dlti.dl_entry<"dlti.max_vector_op_width", 128: ui32>>
+  >} {}
diff --git a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
index 38f0ed0ed8da3..542e9753fe0b9 100644
--- a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
+++ b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
@@ -32,6 +32,9 @@ constexpr static llvm::StringLiteral kGlobalKeyName =
 constexpr static llvm::StringLiteral kStackAlignmentKeyName =
     "dltest.stack_alignment";
 
+constexpr static llvm::StringLiteral kTargetSystemDescAttrName =
+    "dl_target_sys_desc_test.target_system_desc_spec";
+
 /// Trivial array storage for the custom data layout spec attribute, just a list
 /// of entries.
 class DataLayoutSpecStorage : public AttributeStorage {
@@ -91,6 +94,65 @@ struct CustomDataLayoutSpec
   }
 };
 
+class TargetSystemDescSpecStorage : public AttributeStorage {
+public:
+  using KeyTy = ArrayRef<TargetDeviceDescSpecInterface>;
+
+  TargetSystemDescSpecStorage(ArrayRef<TargetDeviceDescSpecInterface> entries)
+      : entries(entries) {}
+
+  bool operator==(const KeyTy &key) const { return key == entries; }
+
+  static TargetSystemDescSpecStorage *
+  construct(AttributeStorageAllocator &allocator, const KeyTy &key) {
+    return new (allocator.allocate<TargetSystemDescSpecStorage>())
+        TargetSystemDescSpecStorage(allocator.copyInto(key));
+  }
+
+  ArrayRef<TargetDeviceDescSpecInterface> entries;
+};
+
+struct CustomTargetSystemDescSpec
+    : public Attribute::AttrBase<CustomTargetSystemDescSpec, Attribute,
+                                 TargetSystemDescSpecStorage,
+                                 TargetSystemDescSpecInterface::Trait> {
+  MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(CustomDataLayoutSpec)
+
+  using Base::Base;
+
+  static constexpr StringLiteral name = "test.custom_target_system_desc_spec";
+
+  static CustomTargetSystemDescSpec
+  get(MLIRContext *ctx, ArrayRef<TargetDeviceDescSpecInterface> entries) {
+    return Base::get(ctx, entries);
+  }
+  TargetDeviceDescSpecListRef getEntries() const { return getImpl()->entries; }
+  LogicalResult verifySpec(Location loc) { return success(); }
+  std::optional<TargetDeviceDescSpecInterface>
+  getDeviceDescForDeviceID(uint32_t deviceID) {
+    for (TargetDeviceDescSpecInterface entry : getEntries()) {
+      if (entry.getDeviceID() == deviceID)
+        return entry;
+    }
+    return std::nullopt;
+  }
+  StringAttr getDeviceIDIdentifier() {
+    return Builder(getContext()).getStringAttr(DLTIDialect::kTargetDeviceIDKey);
+  }
+  StringAttr getDeviceTypeIdentifier() {
+    return Builder(getContext())
+        .getStringAttr(DLTIDialect::kTargetDeviceTypeKey);
+  }
+  StringAttr getMaxVectorOpWidthIdentifier() {
+    return Builder(getContext())
+        .getStringAttr(DLTIDialect::kTargetDeviceMaxVectorOpWidthKey);
+  }
+  StringAttr getL1CacheSizeInBytesIdentifier() {
+    return Builder(getContext())
+        .getStringAttr(DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey);
+  }
+};
+
 /// A type subject to data layout that exits the program if it is queried more
 /// than once. Handy to check if the cache works.
 struct SingleQueryType
@@ -199,7 +261,7 @@ struct OpWithLayout : public Op<OpWithLayout, DataLayoutOpInterface::Trait> {
 
   TargetSystemDescSpecInterface getTargetSystemDescSpec() {
     return getOperation()->getAttrOfType<TargetSystemDescSpecInterface>(
-        kAttrName);
+        kTargetSystemDescAttrName);
   }
 
   static llvm::TypeSize getTypeSizeInBits(Type type,
@@ -251,7 +313,7 @@ struct OpWith7BitByte
 
   TargetSystemDescSpecInterface getTargetSystemDescSpec() {
     return getOperation()->getAttrOfType<TargetSystemDescSpecInterface>(
-        kAttrName);
+        kTargetSystemDescAttrName);
   }
 
   // Bytes are assumed to be 7-bit here.
@@ -318,6 +380,47 @@ struct DLTestDialect : Dialect {
   }
 };
 
+struct DLTargetSystemDescTestDialect : Dialect {
+  MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(DLTargetSystemDescTestDialect)
+
+  explicit DLTargetSystemDescTestDialect(MLIRContext *ctx)
+      : Dialect(getDialectNamespace(), ctx,
+                TypeID::get<DLTargetSystemDescTestDialect>()) {
+    ctx->getOrLoadDialect<DLTIDialect>();
+    addAttributes<CustomTargetSystemDescSpec>();
+  }
+  static StringRef getDialectNamespace() { return "dl_target_sys_desc_test"; }
+
+  void printAttribute(Attribute attr,
+                      DialectAsmPrinter &printer) const override {
+    printer << "target_system_desc_spec<";
+    llvm::interleaveComma(cast<CustomTargetSystemDescSpec>(attr).getEntries(),
+                          printer);
+    printer << ">";
+  }
+
+  Attribute parseAttribute(DialectAsmParser &parser, Type type) const override {
+    bool ok = succeeded(parser.parseKeyword("target_system_desc_spec")) &&
+              succeeded(parser.parseLess());
+    (void)ok;
+    assert(ok);
+    if (succeeded(parser.parseOptionalGreater()))
+      return CustomTargetSystemDescSpec::get(parser.getContext(), {});
+
+    SmallVector<TargetDeviceDescSpecInterface> entries;
+    ok = succeeded(parser.parseCommaSeparatedList([&]() {
+      entries.emplace_back();
+      ok = succeeded(parser.parseAttribute(entries.back()));
+      assert(ok);
+      return success();
+    }));
+    assert(ok);
+    ok = succeeded(parser.parseGreater());
+    assert(ok);
+    return CustomTargetSystemDescSpec::get(parser.getContext(), entries);
+  }
+};
+
 } // namespace
 
 TEST(DataLayout, FallbackDefault) {
@@ -377,6 +480,9 @@ TEST(DataLayout, NullSpec) {
   EXPECT_EQ(layout.getProgramMemorySpace(), Attribute());
   EXPECT_EQ(layout.getGlobalMemorySpace(), Attribute());
   EXPECT_EQ(layout.getStackAlignment(), 0u);
+
+  EXPECT_EQ(layout.getL1CacheSizeInBytes(0 /* device ID*/), std::nullopt);
+  EXPECT_EQ(layout.getMaxVectorOpWidth(0 /* device ID*/), std::nullopt);
 }
 
 TEST(DataLayout, EmptySpec) {
@@ -408,6 +514,9 @@ TEST(DataLayout, EmptySpec) {
   EXPECT_EQ(layout.getProgramMemorySpace(), Attribute());
   EXPECT_EQ(layout.getGlobalMemorySpace(), Attribute());
   EXPECT_EQ(layout.getStackAlignment(), 0u);
+
+  EXPECT_EQ(layout.getL1CacheSizeInBytes(0 /* device ID*/), std::nullopt);
+  EXPECT_EQ(layout.getMaxVectorOpWidth(0 /* device ID*/), std::nullopt);
 }
 
 TEST(DataLayout, SpecWithEntries) {
@@ -459,6 +568,31 @@ TEST(DataLayout, SpecWithEntries) {
   EXPECT_EQ(layout.getStackAlignment(), 128u);
 }
 
+TEST(DataLayout, SpecWithTargetSystemDescEntries) {
+  const char *ir = R"MLIR(
+  module attributes { dl_target_sys_desc_test.target_system_desc_spec =
+    #dl_target_sys_desc_test.target_system_desc_spec<
+      #dlti.target_device_desc_spec<
+        #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
+        #dlti.dl_entry<"dlti.device_type", "CPU">,
+        #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>,
+        #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>
+      >
+    > } {}
+  )MLIR";
+
+  DialectRegistry registry;
+  registry.insert<DLTIDialect, DLTargetSystemDescTestDialect>();
+  MLIRContext ctx(registry);
+
+  OwningOpRef<ModuleOp> module = parseSourceString<ModuleOp>(ir, &ctx);
+  DataLayout layout(*module);
+  EXPECT_EQ(layout.getL1CacheSizeInBytes(0 /* device ID*/),
+            std::optional<uint32_t>(4096));
+  EXPECT_EQ(layout.getMaxVectorOpWidth(0 /* device ID*/),
+            std::optional<uint32_t>(128));
+}
+
 TEST(DataLayout, Caching) {
   const char *ir = R"MLIR(
 "dltest.op_with_layout"() { dltest.layout = #dltest.spec<> } : () -> ()

>From 211002337138ec31a64b603a5cc2f4251b843639 Mon Sep 17 00:00:00 2001
From: Niranjan Hasabnis <niranjan.hasabnis at intel.com>
Date: Thu, 30 May 2024 04:39:14 -0700
Subject: [PATCH 4/7] Addressing review comments

    Mainly as follows:
    - removing custom attribute parser/printer
    - renaming SystemDescSpec to SystemSpec and TargetDeviceDescSpec to
      TargetDeviceSpec
    - using DeviceID as a type insted of uint32_t
    - grammatical errors
---
 mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td   | 175 ++++++------------
 mlir/include/mlir/Dialect/DLTI/DLTIBase.td    |   6 +-
 mlir/include/mlir/Dialect/DLTI/Traits.h       |   6 +-
 mlir/include/mlir/IR/BuiltinOps.td            |   2 +-
 .../mlir/Interfaces/DataLayoutInterfaces.h    |  23 ++-
 .../mlir/Interfaces/DataLayoutInterfaces.td   |  50 ++---
 mlir/lib/Dialect/DLTI/DLTI.cpp                | 150 ++++++++-------
 mlir/lib/Dialect/DLTI/Traits.cpp              |   5 +-
 mlir/lib/IR/BuiltinDialect.cpp                |   5 +-
 mlir/lib/Interfaces/DataLayoutInterfaces.cpp  |  29 ++-
 mlir/test/Dialect/DLTI/invalid.mlir           |  85 +++++----
 mlir/test/Dialect/DLTI/roundtrip.mlir         |  12 +-
 mlir/test/Dialect/DLTI/valid.mlir             |  48 ++---
 .../Interfaces/DataLayoutInterfacesTest.cpp   |  81 ++++----
 14 files changed, 289 insertions(+), 388 deletions(-)

diff --git a/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td b/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
index 7f915b7a015a6..7f45c4acd4164 100644
--- a/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
+++ b/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
@@ -28,7 +28,7 @@ def DataLayoutEntryTrait
 def DLTI_DataLayoutEntryAttr :
     DLTIAttr<"DataLayoutEntry", [DataLayoutEntryTrait]> {
   let summary = [{
-    An attribute to represent an entry of a data layout specification
+    An attribute to represent an entry of a data layout specification.
   }];
   let description = [{
     A data layout entry attribute is a key-value pair where the key is a type or
@@ -38,7 +38,7 @@ def DLTI_DataLayoutEntryAttr :
   let parameters = (ins
     "DataLayoutEntryKey":$key, "Attribute":$value
   );
-  // We do not generate storage class because llvm::PointerUnion
+  // TODO: We do not generate storage class because llvm::PointerUnion
   // does not work with hash_key method.
   let genStorageClass = 0;
   let mnemonic = "dl_entry";
@@ -62,7 +62,9 @@ def DataLayoutSpecTrait
 
 def DLTI_DataLayoutSpecAttr :
     DLTIAttr<"DataLayoutSpec", [DataLayoutSpecTrait]> {
-  let summary = [{An attribute to represent a data layout specification}];
+  let summary = [{
+    An attribute to represent a data layout specification.
+  }];
   let description = [{
     A data layout specification is a list of entries that specify (partial) data
     layout information. It is expected to be attached to operations that serve
@@ -96,84 +98,57 @@ def DLTI_DataLayoutSpecAttr :
     /// Returns the stack alignment identifier.
     StringAttr getStackAlignmentIdentifier(MLIRContext *context) const;
   }];
-  let extraClassDefinition = [{
-    StringAttr
-    $cppClass::getEndiannessIdentifier(MLIRContext *context) const {
-      return Builder(context).getStringAttr(DLTIDialect::kDataLayoutEndiannessKey);
-    }
-
-    StringAttr
-    $cppClass::getAllocaMemorySpaceIdentifier(MLIRContext *context) const {
-      return Builder(context).getStringAttr(
-          DLTIDialect::kDataLayoutAllocaMemorySpaceKey);
-    }
-
-    StringAttr $cppClass::getProgramMemorySpaceIdentifier(
-        MLIRContext *context) const {
-      return Builder(context).getStringAttr(
-          DLTIDialect::kDataLayoutProgramMemorySpaceKey);
-    }
-
-    StringAttr
-    $cppClass::getGlobalMemorySpaceIdentifier(MLIRContext *context) const {
-      return Builder(context).getStringAttr(
-          DLTIDialect::kDataLayoutGlobalMemorySpaceKey);
-    }
-
-    StringAttr
-    $cppClass::getStackAlignmentIdentifier(MLIRContext *context) const {
-      return Builder(context).getStringAttr(
-          DLTIDialect::kDataLayoutStackAlignmentKey);
-    }
-  }];
 }
 
 //===----------------------------------------------------------------------===//
-// TargetSystemDescSpecAttr
+// TargetSystemSpecAttr
 //===----------------------------------------------------------------------===//
 
-def TargetSystemDescSpecTrait
-    : NativeAttrTrait<"TargetSystemDescSpecInterface::Trait"> {
+def TargetSystemSpecTrait
+    : NativeAttrTrait<"TargetSystemSpecInterface::Trait"> {
   let cppNamespace = "::mlir";
 }
 
-def DLTI_TargetSystemDescSpecAttr :
-    DLTIAttr<"TargetSystemDescSpec", [TargetSystemDescSpecTrait]> {
-  let summary = [{An attribute to represent target system description}];
+def DLTI_TargetSystemSpecAttr :
+    DLTIAttr<"TargetSystemSpec", [TargetSystemSpecTrait]> {
+  let summary = [{
+    An attribute to represent target system specification.
+  }];
   let description = [{
-    A system description specification describes the overall system
-    containing multiple devices, with each device having a unique ID
-    and its corresponding TargetDeviceDescSpec object.
+    A system specification describes the overall system containing
+    multiple devices, with each device having a unique ID
+    and its corresponding TargetDeviceSpec object.
 
     Example:
-          dlti.target_system_desc_spec =
-            #dlti.target_device_desc_spec<
+          dlti.target_system_spec =
+            #dlti.target_device_spec<
               #dlti.dl_entry<"dlti.device_id", 0: ui32>,
               #dlti.dl_entry<"dlti.device_type", "CPU">>,
-            #dlti.target_device_desc_spec <
+            #dlti.target_device_spec<
               #dlti.dl_entry<"dlti.device_id", 1: ui32>,
               #dlti.dl_entry<"dlti.device_type", "GPU">,
               #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>,
-            #dlti.target_device_desc_spec <
+            #dlti.target_device_spec<
               #dlti.dl_entry<"dlti.device_id", 2: ui32>,
               #dlti.dl_entry<"dlti.device_type", "XPU">>>
   }];
   let parameters = (ins
-    ArrayRefParameter<"TargetDeviceDescSpecInterface", "">:$entries
+    ArrayRefParameter<"TargetDeviceSpecInterface", "">:$entries
   );
-  let mnemonic = "target_system_desc_spec";
+  let mnemonic = "target_system_spec";
   let genVerifyDecl = 1;
-  let hasCustomAssemblyFormat = 1;
+  let assemblyFormat = "`<` $entries `>`";
   let extraClassDeclaration = [{
-    /// Return the device descriptor that matches the given device ID
-    std::optional<TargetDeviceDescSpecInterface>
-    getDeviceDescForDeviceID(uint32_t deviceID);
+    /// Return the device specification that matches the given device ID
+    std::optional<TargetDeviceSpecInterface>
+    getDeviceSpecForDeviceID(
+      TargetDeviceSpecInterface::DeviceID deviceID);
   }];
   let extraClassDefinition = [{
-    std::optional<TargetDeviceDescSpecInterface>
-    $cppClass::getDeviceDescForDeviceID(
-        TargetDeviceDescSpecInterface::DeviceID deviceID) {
-      for (TargetDeviceDescSpecInterface entry : getEntries()) {
+    std::optional<TargetDeviceSpecInterface>
+    $cppClass::getDeviceSpecForDeviceID(
+        TargetDeviceSpecInterface::DeviceID deviceID) {
+      for (TargetDeviceSpecInterface entry : getEntries()) {
         if (entry.getDeviceID() == deviceID)
           return entry;
       }
@@ -183,35 +158,37 @@ def DLTI_TargetSystemDescSpecAttr :
 }
 
 //===----------------------------------------------------------------------===//
-// TargetDeviceDescSpecAttr
+// TargetDeviceSpecAttr
 //===----------------------------------------------------------------------===//
 
-def TargetDeviceDescSpecTrait
-    : NativeAttrTrait<"TargetDeviceDescSpecInterface::Trait"> {
+def TargetDeviceSpecTrait
+    : NativeAttrTrait<"TargetDeviceSpecInterface::Trait"> {
   let cppNamespace = "::mlir";
 }
 
-def DLTI_TargetDeviceDescSpecAttr :
-    DLTIAttr<"TargetDeviceDescSpec", [TargetDeviceDescSpecTrait]> {
-  let summary = [{An attribute to represent target device description}];
+def DLTI_TargetDeviceSpecAttr :
+    DLTIAttr<"TargetDeviceSpec", [TargetDeviceSpecTrait]> {
+  let summary = [{
+    An attribute to represent target device specification.
+  }];
   let description = [{
-        Each device description specification describes a single device and
-        its hardware properties. Each device description must have a device_id
-        and a device_type. In addition, the description can contain any number
-        of optional hardware properties (e.g., max_vector_op_width below).
+    Each device specification describes a single device and its
+    hardware properties. Each device specification must have a device_id
+    and a device_type. In addition, the specification can contain any number
+    of optional hardware properties (e.g., max_vector_op_width below).
 
-        Example:
-          #dlti.target_device_desc_spec <
-                #dlti.dl_entry<"dlti.device_id", 1: ui32>,
-                #dlti.dl_entry<"dlti.device_type", "GPU">,
-                #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>
-        }];
+    Example:
+      #dlti.target_device_spec<
+            #dlti.dl_entry<"dlti.device_id", 1: ui32>,
+            #dlti.dl_entry<"dlti.device_type", "GPU">,
+            #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>
+  }];
   let parameters = (ins
     ArrayRefParameter<"DataLayoutEntryInterface", "">:$entries
   );
-  let mnemonic = "target_device_desc_spec";
+  let mnemonic = "target_device_spec";
   let genVerifyDecl = 1;
-  let hasCustomAssemblyFormat = 1;
+  let assemblyFormat = "`<` $entries `>`";
   let extraClassDeclaration = [{
     /// Returns the device ID identifier.
     StringAttr getDeviceIDIdentifier();
@@ -248,55 +225,7 @@ def DLTI_TargetDeviceDescSpecAttr :
     DataLayoutEntryInterface getSpecForL1CacheSizeInBytes();
 
     /// Return the value of device ID
-    uint32_t getDeviceID();
-  }];
-
-  let extraClassDefinition = [{
-    StringAttr
-    $cppClass::getDeviceIDIdentifier() {
-      return Builder(getContext()).getStringAttr(DLTIDialect::kTargetDeviceIDKey);
-    }
-
-    StringAttr
-    $cppClass::getDeviceTypeIdentifier() {
-      return Builder(getContext()).getStringAttr(DLTIDialect::kTargetDeviceTypeKey);
-    }
-
-    StringAttr
-    $cppClass::getMaxVectorOpWidthIdentifier() {
-      return Builder(getContext()).getStringAttr(
-          DLTIDialect::kTargetDeviceMaxVectorOpWidthKey);
-    }
-
-    StringAttr $cppClass::getL1CacheSizeInBytesIdentifier() {
-      return Builder(getContext()).getStringAttr(
-          DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey);
-    }
-
-    DataLayoutEntryInterface
-    $cppClass::getSpecForDeviceID() {
-      return getSpecForIdentifier(getDeviceIDIdentifier());
-    }
-
-    DataLayoutEntryInterface
-    $cppClass::getSpecForDeviceType() {
-      return getSpecForIdentifier(getDeviceTypeIdentifier());
-    }
-
-    DataLayoutEntryInterface
-    $cppClass::getSpecForMaxVectorOpWidth() {
-      return getSpecForIdentifier(getMaxVectorOpWidthIdentifier());
-    }
-
-    DataLayoutEntryInterface
-    $cppClass::getSpecForL1CacheSizeInBytes() {
-      return getSpecForIdentifier(getL1CacheSizeInBytesIdentifier());
-    }
-
-    uint32_t $cppClass::getDeviceID() {
-      DataLayoutEntryInterface entry = getSpecForDeviceID();
-      return llvm::cast<IntegerAttr>(entry.getValue()).getValue().getZExtValue();
-    }
+    TargetDeviceSpecInterface::DeviceID getDeviceID();
   }];
 }
 
diff --git a/mlir/include/mlir/Dialect/DLTI/DLTIBase.td b/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
index 61a3d2553d20e..c4e37db232ddb 100644
--- a/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
+++ b/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
@@ -29,10 +29,10 @@ def DLTI_Dialect : Dialect {
 
     // Top level attribute name for target system description
     constexpr const static ::llvm::StringLiteral
-    kTargetSystemDescAttrName = "dlti.target_system_desc_spec";
+    kTargetSystemDescAttrName = "dlti.target_system_spec";
 
     constexpr const static ::llvm::StringLiteral
-    kTargetDeviceDescAttrName = "dlti.target_device_desc_spec";
+    kTargetDeviceDescAttrName = "dlti.target_device_spec";
 
     // Constants used in entries.
     constexpr const static ::llvm::StringLiteral
@@ -56,7 +56,7 @@ def DLTI_Dialect : Dialect {
     constexpr const static ::llvm::StringLiteral
     kDataLayoutStackAlignmentKey = "dlti.stack_alignment";
 
-    // Constants used in target description part of DLTI
+    // Constants used in target description part of DLTI.
     constexpr const static ::llvm::StringLiteral
     kTargetDeviceIDKey = "dlti.device_id";
 
diff --git a/mlir/include/mlir/Dialect/DLTI/Traits.h b/mlir/include/mlir/Dialect/DLTI/Traits.h
index 44083d54c4cad..edfbdffbd1ba1 100644
--- a/mlir/include/mlir/Dialect/DLTI/Traits.h
+++ b/mlir/include/mlir/Dialect/DLTI/Traits.h
@@ -18,7 +18,7 @@ class DataLayoutSpecAttr;
 namespace impl {
 LogicalResult verifyHasDefaultDLTIDataLayoutTrait(Operation *op);
 DataLayoutSpecInterface getDataLayoutSpec(Operation *op);
-TargetSystemDescSpecInterface getTargetSystemDescSpec(Operation *op);
+TargetSystemSpecInterface getTargetSystemSpec(Operation *op);
 } // namespace impl
 
 /// Trait to be used by operations willing to use the implementation of the
@@ -41,8 +41,8 @@ class HasDefaultDLTIDataLayout
 
   /// Returns the target system description specification as provided by DLTI
   /// dialect
-  TargetSystemDescSpecInterface getTargetSystemDescSpec() {
-    return impl::getTargetSystemDescSpec(this->getOperation());
+  TargetSystemSpecInterface getTargetSystemSpec() {
+    return impl::getTargetSystemSpec(this->getOperation());
   }
 };
 } // namespace mlir
diff --git a/mlir/include/mlir/IR/BuiltinOps.td b/mlir/include/mlir/IR/BuiltinOps.td
index bdb4ce3ddfe20..56edd7519cd67 100644
--- a/mlir/include/mlir/IR/BuiltinOps.td
+++ b/mlir/include/mlir/IR/BuiltinOps.td
@@ -78,7 +78,7 @@ def ModuleOp : Builtin_Op<"module", [
     //===------------------------------------------------------------------===//
 
     DataLayoutSpecInterface getDataLayoutSpec();
-    TargetSystemDescSpecInterface getTargetSystemDescSpec();
+    TargetSystemSpecInterface getTargetSystemSpec();
 
     //===------------------------------------------------------------------===//
     // OpAsmOpInterface Methods
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
index 625ac2e9367dc..f5bf63a5b5c90 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
@@ -23,15 +23,14 @@
 namespace mlir {
 class DataLayout;
 class DataLayoutEntryInterface;
-class TargetDeviceDescSpecInterface;
-class TargetSystemDescSpecInterface;
+class TargetDeviceSpecInterface;
+class TargetSystemSpecInterface;
 using DataLayoutEntryKey = llvm::PointerUnion<Type, StringAttr>;
 // Using explicit SmallVector size because we cannot infer the size from the
 // forward declaration, and we need the typedef in the actual declaration.
 using DataLayoutEntryList = llvm::SmallVector<DataLayoutEntryInterface, 4>;
 using DataLayoutEntryListRef = llvm::ArrayRef<DataLayoutEntryInterface>;
-using TargetDeviceDescSpecListRef =
-    llvm::ArrayRef<TargetDeviceDescSpecInterface>;
+using TargetDeviceSpecListRef = llvm::ArrayRef<TargetDeviceSpecInterface>;
 class DataLayoutOpInterface;
 class DataLayoutSpecInterface;
 class ModuleOp;
@@ -109,8 +108,8 @@ filterEntryForIdentifier(DataLayoutEntryListRef entries, StringAttr id);
 
 /// Given a list of target device entries, returns the entry that has the given
 /// identifier as key, if such an entry exists in the list.
-TargetDeviceDescSpecInterface
-filterEntryForIdentifier(TargetDeviceDescSpecListRef entries, StringAttr id);
+TargetDeviceSpecInterface
+filterEntryForIdentifier(TargetDeviceSpecListRef entries, StringAttr id);
 
 /// Verifies that the operation implementing the data layout interface, or a
 /// module operation, is valid. This calls the verifier of the spec attribute
@@ -126,8 +125,8 @@ LogicalResult verifyDataLayoutSpec(DataLayoutSpecInterface spec, Location loc);
 /// Verifies that a target system desc spec is valid. This dispatches to
 /// individual entry verifiers, and then to the verifiers implemented by the
 /// relevant dialect interfaces for identifier keys.
-LogicalResult verifyTargetSystemDescSpec(TargetSystemDescSpecInterface spec,
-                                         Location loc);
+LogicalResult verifyTargetSystemSpec(TargetSystemSpecInterface spec,
+                                     Location loc);
 
 /// Divides the known min value of the numerator by the denominator and rounds
 /// the result up to the next integer. Preserves the scalable flag.
@@ -162,7 +161,7 @@ class DataLayoutDialectInterface
 
   /// Checks whether the given data layout entry is valid and reports any errors
   /// at the provided location. Derived classes should override this.
-  virtual LogicalResult verifyEntry(TargetDeviceDescSpecInterface entry,
+  virtual LogicalResult verifyEntry(TargetDeviceSpecInterface entry,
                                     Location loc) const {
     return success();
   }
@@ -247,19 +246,19 @@ class DataLayout {
   /// Returns for max vector op width if the property is defined for the given
   /// device ID, otherwise return std::nullopt.
   std::optional<uint32_t>
-      getMaxVectorOpWidth(TargetDeviceDescSpecInterface::DeviceID) const;
+      getMaxVectorOpWidth(TargetDeviceSpecInterface::DeviceID) const;
 
   /// Returns for L1 cache size if the property is defined for the given
   /// device ID, otherwise return std::nullopt.
   std::optional<uint32_t>
-      getL1CacheSizeInBytes(TargetDeviceDescSpecInterface::DeviceID) const;
+      getL1CacheSizeInBytes(TargetDeviceSpecInterface::DeviceID) const;
 
 private:
   /// Combined layout spec at the given scope.
   const DataLayoutSpecInterface originalLayout;
 
   /// Combined target system desc spec at the given scope.
-  const TargetSystemDescSpecInterface originalTargetSystemDesc;
+  const TargetSystemSpecInterface originalTargetSystemDesc;
 
 #if LLVM_ENABLE_ABI_BREAKING_CHECKS
   /// List of enclosing layout specs.
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
index 5c431097c7e77..1d4ede62a337d 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
@@ -194,7 +194,7 @@ def DataLayoutSpecInterface : AttrInterface<"DataLayoutSpecInterface"> {
   }];
 }
 
-def TargetDeviceDescSpecInterface : AttrInterface<"TargetDeviceDescSpecInterface"> {
+def TargetDeviceSpecInterface : AttrInterface<"TargetDeviceSpecInterface"> {
   let cppNamespace = "::mlir";
 
   let description = [{
@@ -238,30 +238,6 @@ def TargetDeviceDescSpecInterface : AttrInterface<"TargetDeviceDescSpecInterface
       /*methodBody=*/"",
       /*defaultImplementation=*/[{ return ::mlir::success(); }]
     >,
-    InterfaceMethod<
-      /*description=*/"Returns the device ID identifier.",
-      /*retTy=*/"::mlir::StringAttr",
-      /*methodName=*/"getDeviceIDIdentifier",
-      /*args=*/(ins)
-    >,
-    InterfaceMethod<
-      /*description=*/"Returns the device type identifier.",
-      /*retTy=*/"::mlir::StringAttr",
-      /*methodName=*/"getDeviceTypeIdentifier",
-      /*args=*/(ins)
-    >,
-    InterfaceMethod<
-      /*description=*/"Returns the L1 cache size identifier.",
-      /*retTy=*/"::mlir::StringAttr",
-      /*methodName=*/"getL1CacheSizeInBytesIdentifier",
-      /*args=*/(ins)
-    >,
-    InterfaceMethod<
-      /*description=*/"Returns the max vector op width identifier.",
-      /*retTy=*/"::mlir::StringAttr",
-      /*methodName=*/"getMaxVectorOpWidthIdentifier",
-      /*args=*/(ins)
-    >,
     InterfaceMethod<
       /*description=*/"Returns the entry related to Device ID. The function"
                       "will crash if the entry is missing.",
@@ -270,7 +246,7 @@ def TargetDeviceDescSpecInterface : AttrInterface<"TargetDeviceDescSpecInterface
       /*args=*/(ins)
     >,
     InterfaceMethod<
-      /*description=*/"Returns the entry related to the given identifier. "
+      /*description=*/"Returns the entry related to Device Type. "
                       "The function will crash if the entry is missing.",
       /*retTy=*/"::mlir::DataLayoutEntryInterface",
       /*methodName=*/"getSpecForDeviceType",
@@ -304,7 +280,7 @@ def TargetDeviceDescSpecInterface : AttrInterface<"TargetDeviceDescSpecInterface
   }];
 }
 
-def TargetSystemDescSpecInterface : AttrInterface<"TargetSystemDescSpecInterface"> {
+def TargetSystemSpecInterface : AttrInterface<"TargetSystemSpecInterface"> {
   let cppNamespace = "::mlir";
 
   let description = [{
@@ -324,27 +300,26 @@ def TargetSystemDescSpecInterface : AttrInterface<"TargetSystemDescSpecInterface
   let methods = [
     InterfaceMethod<
       /*description=*/"Returns the list of layout entries.",
-      /*retTy=*/"llvm::ArrayRef<::mlir::TargetDeviceDescSpecInterface>",
+      /*retTy=*/"llvm::ArrayRef<::mlir::TargetDeviceSpecInterface>",
       /*methodName=*/"getEntries",
       /*args=*/(ins)
     >,
     InterfaceMethod<
       /*description=*/"Returns the device description spec for given device "
                       "ID",
-      /*retTy=*/"std::optional<::mlir::TargetDeviceDescSpecInterface>",
-      /*methodName=*/"getDeviceDescForDeviceID",
-      /*args=*/(ins "int":$deviceID)
+      /*retTy=*/"std::optional<::mlir::TargetDeviceSpecInterface>",
+      /*methodName=*/"getDeviceSpecForDeviceID",
+      /*args=*/(ins "TargetDeviceSpecInterface::DeviceID":$deviceID)
     >,
     InterfaceMethod<
       /*description=*/"Verifies the validity of the specification and "
-                      "reports "
-                      "any errors at the given location.",
+                      "reports any errors at the given location.",
       /*retTy=*/"::mlir::LogicalResult",
       /*methodName=*/"verifySpec",
       /*args=*/(ins "::mlir::Location":$loc),
       /*methodBody=*/"",
       /*defaultImplementation=*/[{
-        return ::mlir::detail::verifyTargetSystemDescSpec($_attr, loc);
+        return ::mlir::detail::verifyTargetSystemSpec($_attr, loc);
       }]
     >
   ];
@@ -385,10 +360,9 @@ def DataLayoutOpInterface : OpInterface<"DataLayoutOpInterface"> {
     >,
     InterfaceMethod<
       /*description=*/"Returns the target system desc specification for this "
-                      "op, or "
-                      "null if it does not exist.",
-      /*retTy=*/"::mlir::TargetSystemDescSpecInterface",
-      /*methodName=*/"getTargetSystemDescSpec",
+                      "op, or null if it does not exist.",
+      /*retTy=*/"::mlir::TargetSystemSpecInterface",
+      /*methodName=*/"getTargetSystemSpec",
       /*args=*/(ins)
     >,
     StaticInterfaceMethod<
diff --git a/mlir/lib/Dialect/DLTI/DLTI.cpp b/mlir/lib/Dialect/DLTI/DLTI.cpp
index fe2b18b966c6b..23d40e7f4fd51 100644
--- a/mlir/lib/Dialect/DLTI/DLTI.cpp
+++ b/mlir/lib/Dialect/DLTI/DLTI.cpp
@@ -23,6 +23,9 @@ using namespace mlir;
 
 #include "mlir/Dialect/DLTI/DLTIDialect.cpp.inc"
 
+#define GET_ATTRDEF_CLASSES
+#include <mlir/Dialect/DLTI/DLTIAttrs.cpp.inc>
+
 #define DEBUG_TYPE "dlti"
 
 //===----------------------------------------------------------------------===//
@@ -265,12 +268,12 @@ void DataLayoutSpecAttr::print(AsmPrinter &os) const {
 }
 
 //===----------------------------------------------------------------------===//
-// TargetDeviceDescSpecAttr
+// TargetDeviceSpecAttr
 //===----------------------------------------------------------------------===//
 
 LogicalResult
-TargetDeviceDescSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
-                                 ArrayRef<DataLayoutEntryInterface> entries) {
+TargetDeviceSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
+                             ArrayRef<DataLayoutEntryInterface> entries) {
   // Entries in tdd_spec can only have StringAttr as key. It does not support
   // type as a key. Hence not reusing DataLayoutEntryInterface::verify.
   bool targetDeviceIDKeyPresentAndValid = false;
@@ -280,7 +283,7 @@ TargetDeviceDescSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
   for (DataLayoutEntryInterface entry : entries) {
     if (auto type = llvm::dyn_cast_if_present<Type>(entry.getKey())) {
       return emitError()
-             << "dlti.target_device_desc_spec does not allow type as a key: "
+             << "dlti.target_device_spec does not allow type as a key: "
              << type;
     } else {
       auto id = entry.getKey().get<StringAttr>();
@@ -306,18 +309,18 @@ TargetDeviceDescSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
       IntegerAttr value =
           llvm::dyn_cast_if_present<IntegerAttr>(entry.getValue());
       if (!value || !value.getType().isUnsignedInteger(32))
-        return emitError() << "target_device_desc_spec requires value of key: "
+        return emitError() << "target_device_spec requires value of key: "
                            << DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey
                            << " to be of ui32 type";
     } else if (entryName == DLTIDialect::kTargetDeviceMaxVectorOpWidthKey) {
       IntegerAttr value =
           llvm::dyn_cast_if_present<IntegerAttr>(entry.getValue());
       if (!value || !value.getType().isUnsignedInteger(32))
-        return emitError() << "target_device_desc_spec requires value of key: "
+        return emitError() << "target_device_spec requires value of key: "
                            << DLTIDialect::kTargetDeviceMaxVectorOpWidthKey
                            << " to be of ui32 type";
     } else {
-      return emitError() << "unknown target device desc key name: "
+      return emitError() << "unknown target device spec key name: "
                          << entryName;
     }
   }
@@ -325,12 +328,12 @@ TargetDeviceDescSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
   // check that both DeviceID and DeviceType are present
   // and are of correct type.
   if (!targetDeviceIDKeyPresentAndValid) {
-    return emitError() << "target_device_desc_spec requires key: "
+    return emitError() << "target_device_spec requires key: "
                        << DLTIDialect::kTargetDeviceIDKey
                        << " and its value of ui32 type";
   }
   if (!targetDeviceTypeKeyPresentAndValid) {
-    return emitError() << "target_device_desc_spec requires key: "
+    return emitError() << "target_device_spec requires key: "
                        << DLTIDialect::kTargetDeviceTypeKey
                        << " and its value of string type";
   }
@@ -338,94 +341,97 @@ TargetDeviceDescSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
   return success();
 }
 
-/// Parses an attribute with syntax
-///   target_device_desc_spec_attr ::=
-///      `#target.` `target_device_desc_spec` `<` dl-entry-attr-list? `>`
-///   dl-entry-attr-list ::= dl-entry-attr
-///                         | dl-entry-attr `,` dl-entry-attr-list
-Attribute TargetDeviceDescSpecAttr::parse(AsmParser &parser, Type type) {
-  if (failed(parser.parseLess()))
-    return {};
+StringAttr TargetDeviceSpecAttr::getDeviceIDIdentifier() {
+  return Builder(getContext()).getStringAttr(DLTIDialect::kTargetDeviceIDKey);
+}
 
-  // Empty spec.
-  if (succeeded(parser.parseOptionalGreater()))
-    return get(parser.getContext(), {});
+StringAttr TargetDeviceSpecAttr::getDeviceTypeIdentifier() {
+  return Builder(getContext()).getStringAttr(DLTIDialect::kTargetDeviceTypeKey);
+}
 
-  SmallVector<DataLayoutEntryInterface> entries;
-  if (parser.parseCommaSeparatedList(
-          [&]() { return parser.parseAttribute(entries.emplace_back()); }) ||
-      parser.parseGreater())
-    return {};
+StringAttr TargetDeviceSpecAttr::getMaxVectorOpWidthIdentifier() {
+  return Builder(getContext())
+      .getStringAttr(DLTIDialect::kTargetDeviceMaxVectorOpWidthKey);
+}
 
-  return getChecked([&] { return parser.emitError(parser.getNameLoc()); },
-                    parser.getContext(), entries);
+StringAttr TargetDeviceSpecAttr::getL1CacheSizeInBytesIdentifier() {
+  return Builder(getContext())
+      .getStringAttr(DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey);
 }
 
-void TargetDeviceDescSpecAttr::print(AsmPrinter &os) const {
-  os << "<";
-  llvm::interleaveComma(getEntries(), os);
-  os << ">";
+DataLayoutEntryInterface TargetDeviceSpecAttr::getSpecForDeviceID() {
+  return getSpecForIdentifier(getDeviceIDIdentifier());
+}
+
+DataLayoutEntryInterface TargetDeviceSpecAttr::getSpecForDeviceType() {
+  return getSpecForIdentifier(getDeviceTypeIdentifier());
+}
+
+DataLayoutEntryInterface TargetDeviceSpecAttr::getSpecForMaxVectorOpWidth() {
+  return getSpecForIdentifier(getMaxVectorOpWidthIdentifier());
+}
+
+DataLayoutEntryInterface TargetDeviceSpecAttr::getSpecForL1CacheSizeInBytes() {
+  return getSpecForIdentifier(getL1CacheSizeInBytesIdentifier());
+}
+
+TargetDeviceSpecInterface::DeviceID TargetDeviceSpecAttr::getDeviceID() {
+  DataLayoutEntryInterface entry = getSpecForDeviceID();
+  return llvm::cast<IntegerAttr>(entry.getValue()).getValue().getZExtValue();
 }
 
 //===----------------------------------------------------------------------===//
-// TargetSystemDescSpecAttr
+// TargetSystemSpecAttr
 //===----------------------------------------------------------------------===//
 
-LogicalResult TargetSystemDescSpecAttr::verify(
-    function_ref<InFlightDiagnostic()> emitError,
-    ArrayRef<TargetDeviceDescSpecInterface> entries) {
+LogicalResult
+TargetSystemSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
+                             ArrayRef<TargetDeviceSpecInterface> entries) {
   DenseSet<uint32_t> device_ids;
 
-  for (TargetDeviceDescSpecInterface tdd_spec : entries) {
-    // First verify that a target device desc spec is valid.
-    if (failed(
-            TargetDeviceDescSpecAttr::verify(emitError, tdd_spec.getEntries())))
+  for (TargetDeviceSpecInterface tdd_spec : entries) {
+    // First verify that a target device spec is valid.
+    if (failed(TargetDeviceSpecAttr::verify(emitError, tdd_spec.getEntries())))
       return failure();
 
     // Check that device IDs are unique across all entries.
     uint32_t device_id = tdd_spec.getDeviceID();
     if (!device_ids.insert(device_id).second) {
-      return emitError()
-             << "repeated Device ID in dlti.target_system_desc_spec: "
-             << device_id;
+      return emitError() << "repeated Device ID in dlti.target_system_spec: "
+                         << device_id;
     }
   }
   return success();
 }
 
-/// Parses an attribute with syntax
-///   attr ::=
-///     `#target.` `target_system_desc_spec` `<`
-///     target-device-desc-spec-attr-list? `>`
-///   target-device-desc-spec-attr-list ::= target_device_desc_spec
-///                                     | target_device_desc_spec `,`
-///                                       target-device-desc-spec-attr-list
-Attribute TargetSystemDescSpecAttr::parse(AsmParser &parser, Type type) {
-  if (failed(parser.parseLess()))
-    return {};
-
-  // Empty spec.
-  if (succeeded(parser.parseOptionalGreater()))
-    return get(parser.getContext(), {});
+StringAttr
+DataLayoutSpecAttr::getEndiannessIdentifier(MLIRContext *context) const {
+  return Builder(context).getStringAttr(DLTIDialect::kDataLayoutEndiannessKey);
+}
 
-  SmallVector<TargetDeviceDescSpecInterface> entries;
-  if (parser.parseCommaSeparatedList(
-          [&]() { return parser.parseAttribute(entries.emplace_back()); }) ||
-      parser.parseGreater())
-    return {};
+StringAttr
+DataLayoutSpecAttr::getAllocaMemorySpaceIdentifier(MLIRContext *context) const {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kDataLayoutAllocaMemorySpaceKey);
+}
 
-  return getChecked([&] { return parser.emitError(parser.getNameLoc()); },
-                    parser.getContext(), entries);
+StringAttr DataLayoutSpecAttr::getProgramMemorySpaceIdentifier(
+    MLIRContext *context) const {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kDataLayoutProgramMemorySpaceKey);
 }
 
-void TargetSystemDescSpecAttr::print(AsmPrinter &os) const {
-  os << "<";
-  llvm::interleaveComma(getEntries(), os);
-  os << ">";
+StringAttr
+DataLayoutSpecAttr::getGlobalMemorySpaceIdentifier(MLIRContext *context) const {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kDataLayoutGlobalMemorySpaceKey);
 }
 
-#define GET_ATTRDEF_CLASSES
-#include <mlir/Dialect/DLTI/DLTIAttrs.cpp.inc>
+StringAttr
+DataLayoutSpecAttr::getStackAlignmentIdentifier(MLIRContext *context) const {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kDataLayoutStackAlignmentKey);
+}
 
 //===----------------------------------------------------------------------===//
 // DLTIDialect
@@ -470,7 +476,7 @@ class SystemDescSpecInterface : public DataLayoutDialectInterface {
 public:
   using DataLayoutDialectInterface::DataLayoutDialectInterface;
 
-  LogicalResult verifyEntry(TargetDeviceDescSpecInterface entry,
+  LogicalResult verifyEntry(TargetDeviceSpecInterface entry,
                             Location loc) const final {
 
     for (DataLayoutEntryInterface dl_entry : entry.getEntries()) {
@@ -507,10 +513,10 @@ LogicalResult DLTIDialect::verifyOperationAttribute(Operation *op,
       return detail::verifyDataLayoutOp(op);
     return success();
   } else if (attr.getName() == DLTIDialect::kTargetSystemDescAttrName) {
-    if (!llvm::isa<TargetSystemDescSpecAttr>(attr.getValue())) {
+    if (!llvm::isa<TargetSystemSpecAttr>(attr.getValue())) {
       return op->emitError()
              << "'" << DLTIDialect::kTargetSystemDescAttrName
-             << "' is expected to be a #dlti.target_system_desc_spec attribute";
+             << "' is expected to be a #dlti.target_system_spec attribute";
     }
     return success();
   }
diff --git a/mlir/lib/Dialect/DLTI/Traits.cpp b/mlir/lib/Dialect/DLTI/Traits.cpp
index ead656774a27c..34f2dd5896083 100644
--- a/mlir/lib/Dialect/DLTI/Traits.cpp
+++ b/mlir/lib/Dialect/DLTI/Traits.cpp
@@ -28,8 +28,7 @@ DataLayoutSpecInterface mlir::impl::getDataLayoutSpec(Operation *op) {
       DLTIDialect::kDataLayoutAttrName);
 }
 
-TargetSystemDescSpecInterface
-mlir::impl::getTargetSystemDescSpec(Operation *op) {
-  return op->getAttrOfType<TargetSystemDescSpecAttr>(
+TargetSystemSpecInterface mlir::impl::getTargetSystemSpec(Operation *op) {
+  return op->getAttrOfType<TargetSystemSpecAttr>(
       DLTIDialect::kTargetSystemDescAttrName);
 }
diff --git a/mlir/lib/IR/BuiltinDialect.cpp b/mlir/lib/IR/BuiltinDialect.cpp
index 1d57e0bdef187..99796c5f1c371 100644
--- a/mlir/lib/IR/BuiltinDialect.cpp
+++ b/mlir/lib/IR/BuiltinDialect.cpp
@@ -155,13 +155,12 @@ DataLayoutSpecInterface ModuleOp::getDataLayoutSpec() {
   return {};
 }
 
-TargetSystemDescSpecInterface ModuleOp::getTargetSystemDescSpec() {
+TargetSystemSpecInterface ModuleOp::getTargetSystemSpec() {
   // Take the first and only (if present) attribute that implements the
   // interface. This needs a linear search, but is called only once per data
   // layout object construction that is used for repeated queries.
   for (NamedAttribute attr : getOperation()->getAttrs())
-    if (auto spec =
-            llvm::dyn_cast<TargetSystemDescSpecInterface>(attr.getValue()))
+    if (auto spec = llvm::dyn_cast<TargetSystemSpecInterface>(attr.getValue()))
       return spec;
   return {};
 }
diff --git a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
index 19a662b3793ba..3456b804b9800 100644
--- a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
+++ b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
@@ -346,8 +346,7 @@ static DataLayoutSpecInterface getSpec(Operation *operation) {
       });
 }
 
-static TargetSystemDescSpecInterface
-getTargetSystemDescSpec(Operation *operation) {
+static TargetSystemSpecInterface getTargetSystemSpec(Operation *operation) {
   if (operation) {
     ModuleOp moduleOp;
     if (isa<ModuleOp>(operation)) {
@@ -355,9 +354,9 @@ getTargetSystemDescSpec(Operation *operation) {
     } else {
       moduleOp = operation->getParentOfType<ModuleOp>();
     }
-    return moduleOp.getTargetSystemDescSpec();
+    return moduleOp.getTargetSystemSpec();
   } else
-    return TargetSystemDescSpecInterface();
+    return TargetSystemSpecInterface();
 }
 
 /// Populates `opsWithLayout` with the list of proper ancestors of `leaf` that
@@ -472,7 +471,7 @@ mlir::DataLayout::DataLayout(DataLayoutOpInterface op)
     : originalLayout(getCombinedDataLayout(op)), scope(op),
       allocaMemorySpace(std::nullopt), programMemorySpace(std::nullopt),
       globalMemorySpace(std::nullopt), stackAlignment(std::nullopt),
-      originalTargetSystemDesc(getTargetSystemDescSpec(op)) {
+      originalTargetSystemDesc(getTargetSystemSpec(op)) {
 #if LLVM_ENABLE_ABI_BREAKING_CHECKS
   checkMissingLayout(originalLayout, op);
   collectParentLayouts(op, layoutStack);
@@ -483,7 +482,7 @@ mlir::DataLayout::DataLayout(ModuleOp op)
     : originalLayout(getCombinedDataLayout(op)), scope(op),
       allocaMemorySpace(std::nullopt), programMemorySpace(std::nullopt),
       globalMemorySpace(std::nullopt), stackAlignment(std::nullopt),
-      originalTargetSystemDesc(getTargetSystemDescSpec(op)) {
+      originalTargetSystemDesc(getTargetSystemSpec(op)) {
 #if LLVM_ENABLE_ABI_BREAKING_CHECKS
   checkMissingLayout(originalLayout, op);
   collectParentLayouts(op, layoutStack);
@@ -679,12 +678,12 @@ uint64_t mlir::DataLayout::getStackAlignment() const {
 }
 
 std::optional<uint32_t> mlir::DataLayout::getMaxVectorOpWidth(
-    TargetDeviceDescSpecInterface::DeviceID deviceID) const {
+    TargetDeviceSpecInterface::DeviceID deviceID) const {
   checkValid();
   DataLayoutEntryInterface entry;
   if (originalTargetSystemDesc) {
     if (auto device =
-            originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID))
+            originalTargetSystemDesc.getDeviceSpecForDeviceID(deviceID))
       entry = device->getSpecForMaxVectorOpWidth();
   }
   // Currently I am not caching the results because we do not return
@@ -698,12 +697,12 @@ std::optional<uint32_t> mlir::DataLayout::getMaxVectorOpWidth(
 }
 
 std::optional<uint32_t> mlir::DataLayout::getL1CacheSizeInBytes(
-    TargetDeviceDescSpecInterface::DeviceID deviceID) const {
+    TargetDeviceSpecInterface::DeviceID deviceID) const {
   checkValid();
   DataLayoutEntryInterface entry;
   if (originalTargetSystemDesc) {
     if (auto device =
-            originalTargetSystemDesc.getDeviceDescForDeviceID(deviceID))
+            originalTargetSystemDesc.getDeviceSpecForDeviceID(deviceID))
       entry = device->getSpecForL1CacheSizeInBytes();
   }
   // Currently I am not caching the results because we do not return
@@ -821,18 +820,18 @@ LogicalResult mlir::detail::verifyDataLayoutSpec(DataLayoutSpecInterface spec,
 }
 
 LogicalResult
-mlir::detail::verifyTargetSystemDescSpec(TargetSystemDescSpecInterface spec,
-                                         Location loc) {
+mlir::detail::verifyTargetSystemSpec(TargetSystemSpecInterface spec,
+                                     Location loc) {
   DenseMap<StringAttr, DataLayoutEntryInterface> device_desc_keys;
-  DenseSet<uint32_t> device_ids;
-  for (TargetDeviceDescSpecInterface tdd_spec : spec.getEntries()) {
+  DenseSet<TargetDeviceSpecInterface::DeviceID> device_ids;
+  for (TargetDeviceSpecInterface tdd_spec : spec.getEntries()) {
     // First, verify individual target device desc specs.
     if (failed(tdd_spec.verifyEntry(loc)))
       return failure();
 
     // Check that device IDs are unique across all entries.
     MLIRContext *context = tdd_spec.getContext();
-    uint32_t device_id = tdd_spec.getDeviceID();
+    TargetDeviceSpecInterface::DeviceID device_id = tdd_spec.getDeviceID();
     if (!device_ids.insert(device_id).second) {
       return failure();
     }
diff --git a/mlir/test/Dialect/DLTI/invalid.mlir b/mlir/test/Dialect/DLTI/invalid.mlir
index 7810c659f3158..28be8d37a50bf 100644
--- a/mlir/test/Dialect/DLTI/invalid.mlir
+++ b/mlir/test/Dialect/DLTI/invalid.mlir
@@ -93,47 +93,52 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<#dlti.dl_entry<"unknown.unknown
 
 // -----
 
-// expected-error at below {{'dlti.target_system_desc_spec' is expected to be a #dlti.target_system_desc_spec attribute}}
-"test.unknown_op"() { dlti.target_system_desc_spec = 42 } : () -> ()
+// expected-error at below {{'dlti.target_system_spec' is expected to be a #dlti.target_system_spec attribute}}
+"test.unknown_op"() { dlti.target_system_spec = 42 } : () -> ()
 
 // -----
 
 // expected-error at below {{invalid kind of attribute specified}}
-"test.unknown_op"() { dlti.target_system_desc_spec = #dlti.target_system_desc_spec<[]> } : () -> ()
+// expected-error at below {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+"test.unknown_op"() { dlti.target_system_spec = #dlti.target_system_spec<[]> } : () -> ()
 
 // -----
 
 module attributes {
-  // expected-error at +2 {{target_device_desc_spec requires key: dlti.device_id and its value of ui32 type}}
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  // expected-error at +3 {{target_device_spec requires key: dlti.device_id and its value of ui32 type}}
+  // expected-error at +4 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_type", "CPU">> 
   >} {}
 
 // -----
 
 module attributes {
-  // expected-error at +2 {{target_device_desc_spec requires key: dlti.device_type and its value of string type}}
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  // expected-error at +3 {{target_device_spec requires key: dlti.device_type and its value of string type}}
+  // expected-error at +4 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0: ui32>> 
   >} {}
 
 // -----
 
 module attributes {
-  // expected-error at +2 {{target_device_desc_spec requires key: dlti.device_id and its value of ui32 type}}
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  // expected-error at +3 {{target_device_spec requires key: dlti.device_id and its value of ui32 type}}
+  // expected-error at +4 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0: i32>> 
   >} {}
 
 // -----
 
 module attributes {
-  // expected-error at +2 {{target_device_desc_spec requires key: dlti.device_type and its value of string type}}
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  // expected-error at +3 {{target_device_spec requires key: dlti.device_type and its value of string type}}
+  // expected-error at +5 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
       #dlti.dl_entry<"dlti.device_type", 0: i32>> 
   >} {}
@@ -141,9 +146,10 @@ module attributes {
 // -----
 
 module attributes {
-  // expected-error at +2 {{repeated layout entry key: dlti.device_id}}
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  // expected-error at +3 {{repeated layout entry key: dlti.device_id}}
+  // expected-error at +7 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
       #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">,
@@ -153,9 +159,10 @@ module attributes {
 // -----
 
 module attributes {
-  // expected-error at +2 {{repeated layout entry key: dlti.device_type}}
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  // expected-error at +3 {{repeated layout entry key: dlti.device_type}}
+  // expected-error at +7 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">,
       #dlti.dl_entry<"dlti.device_type", "GPU">,
@@ -165,9 +172,10 @@ module attributes {
 // -----
 
 module attributes {
-  // expected-error at +2 {{target_device_desc_spec requires value of key: dlti.L1_cache_size_in_bytes to be of ui32 type}}
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  // expected-error at +3 {{target_device_spec requires value of key: dlti.L1_cache_size_in_bytes to be of ui32 type}}
+  // expected-error at +6 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">,
       #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096.1 : f32>>
@@ -176,9 +184,10 @@ module attributes {
 // -----
 
 module attributes {
-  // expected-error at +2 {{target_device_desc_spec requires value of key: dlti.max_vector_op_width to be of ui32 type}}
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  // expected-error at +3 {{target_device_spec requires value of key: dlti.max_vector_op_width to be of ui32 type}}
+  // expected-error at +6 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">,
       #dlti.dl_entry<"dlti.max_vector_op_width", 4096.1 : f32>>
@@ -187,9 +196,10 @@ module attributes {
 // -----
 
 module attributes {
-  // expected-error at +2 {{unknown target device desc key name: dlti.L2_cache_size_in_bytes}}
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  // expected-error at +3 {{unknown target device spec key name: dlti.L2_cache_size_in_bytes}}
+  // expected-error at +6 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">,
       #dlti.dl_entry<"dlti.L2_cache_size_in_bytes", 4096 : i32>>
@@ -198,9 +208,10 @@ module attributes {
 // -----
 
 module attributes {
-  // expected-error at +2 {{unknown target device desc key name: dlti.unknown_key}}
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  // expected-error at +3 {{unknown target device spec key name: dlti.unknown_key}}
+  // expected-error at +6 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0>,
       #dlti.dl_entry<"dlti.device_type", "CPU">,
       #dlti.dl_entry<"dlti.unknown_key", 42>>
@@ -209,12 +220,12 @@ module attributes {
 // -----
 
 module attributes {
-  // unexpected-error at below {{repeated Device ID in dlti.target_system_desc_spec: 0}}
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  // unexpected-error at below {{repeated Device ID in dlti.target_system_spec: 0}}
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0: ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">>,
-    #dlti.target_device_desc_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0: ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">>
   >} {}
diff --git a/mlir/test/Dialect/DLTI/roundtrip.mlir b/mlir/test/Dialect/DLTI/roundtrip.mlir
index 80330273b8de6..ccd80cda6f75f 100644
--- a/mlir/test/Dialect/DLTI/roundtrip.mlir
+++ b/mlir/test/Dialect/DLTI/roundtrip.mlir
@@ -56,24 +56,24 @@
 
 // A valid target system description
 // CHECK: module attributes {
-// CHECK-SAME: dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-// CHECK-SAME:  #dlti.target_device_desc_spec<
+// CHECK-SAME: dlti.target_system_spec = #dlti.target_system_spec<
+// CHECK-SAME:  #dlti.target_device_spec<
 // CHECK-SAME:   #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
 // CHECK-SAME:   #dlti.dl_entry<"dlti.device_type", "CPU">,
 // CHECK-SAME:   #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
-// CHECK-SAME: #dlti.target_device_desc_spec<
+// CHECK-SAME: #dlti.target_device_spec<
 // CHECK-SAME:  #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
 // CHECK-SAME:  #dlti.dl_entry<"dlti.device_type", "GPU">,
 // CHECK-SAME:  #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
 // CHECK-SAME: >} {
 // CHECK: }
 module attributes {
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0: ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">,
       #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
-    #dlti.target_device_desc_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 1: ui32>,
       #dlti.dl_entry<"dlti.device_type", "GPU">,
       #dlti.dl_entry<"dlti.max_vector_op_width", 128: ui32>>
diff --git a/mlir/test/Dialect/DLTI/valid.mlir b/mlir/test/Dialect/DLTI/valid.mlir
index 8f44e9568bc5d..dff1434a26f48 100644
--- a/mlir/test/Dialect/DLTI/valid.mlir
+++ b/mlir/test/Dialect/DLTI/valid.mlir
@@ -3,21 +3,21 @@
 // -----
 
 // CHECK:      module attributes {
-// CHECK-SAME:  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
+// CHECK-SAME:    #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">>,
-// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:    #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">>
 // CHECK-SAME:  >} {
 // CHECK:        }
 module attributes {
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0: ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">>,
-    #dlti.target_device_desc_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 1: ui32>,
       #dlti.dl_entry<"dlti.device_type", "GPU">>
   >} {}
@@ -25,24 +25,24 @@ module attributes {
 // -----
 
 // CHECK:      module attributes {
-// CHECK-SAME:  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
+// CHECK-SAME:    #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
-// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:    #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
 // CHECK-SAME:  >} {
 // CHECK:        }
 module attributes {
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0: ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">,
       #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
-    #dlti.target_device_desc_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 1: ui32>,
       #dlti.dl_entry<"dlti.device_type", "GPU">,
       #dlti.dl_entry<"dlti.max_vector_op_width", 128: ui32>>
@@ -51,24 +51,24 @@ module attributes {
 // -----
 
 // CHECK:      module attributes {
-// CHECK-SAME:  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
+// CHECK-SAME:    #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
-// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:    #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192 : ui32>>
 // CHECK-SAME:  >} {
 // CHECK:        }
 module attributes {
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0: ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">,
       #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
-    #dlti.target_device_desc_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 1: ui32>,
       #dlti.dl_entry<"dlti.device_type", "GPU">,
       #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192: ui32>>
@@ -77,24 +77,24 @@ module attributes {
 // -----
 
 // CHECK:      module attributes {
-// CHECK-SAME:  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
+// CHECK-SAME:    #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>,
-// CHECK-SAME:    #dlti.target_device_desc_spec<
+// CHECK-SAME:    #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">,
 // CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
 // CHECK-SAME:  >} {
 // CHECK:        }
 module attributes {
-  dlti.target_system_desc_spec = #dlti.target_system_desc_spec<
-    #dlti.target_device_desc_spec<
+  dlti.target_system_spec = #dlti.target_system_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 0: ui32>,
       #dlti.dl_entry<"dlti.device_type", "CPU">,
       #dlti.dl_entry<"dlti.max_vector_op_width", 64: ui32>>,
-    #dlti.target_device_desc_spec<
+    #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.device_id", 1: ui32>,
       #dlti.dl_entry<"dlti.device_type", "GPU">,
       #dlti.dl_entry<"dlti.max_vector_op_width", 128: ui32>>
diff --git a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
index 542e9753fe0b9..a0ba54f32a9e3 100644
--- a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
+++ b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
@@ -33,7 +33,7 @@ constexpr static llvm::StringLiteral kStackAlignmentKeyName =
     "dltest.stack_alignment";
 
 constexpr static llvm::StringLiteral kTargetSystemDescAttrName =
-    "dl_target_sys_desc_test.target_system_desc_spec";
+    "dl_target_sys_desc_test.target_system_spec";
 
 /// Trivial array storage for the custom data layout spec attribute, just a list
 /// of entries.
@@ -94,63 +94,48 @@ struct CustomDataLayoutSpec
   }
 };
 
-class TargetSystemDescSpecStorage : public AttributeStorage {
+class TargetSystemSpecStorage : public AttributeStorage {
 public:
-  using KeyTy = ArrayRef<TargetDeviceDescSpecInterface>;
+  using KeyTy = ArrayRef<TargetDeviceSpecInterface>;
 
-  TargetSystemDescSpecStorage(ArrayRef<TargetDeviceDescSpecInterface> entries)
+  TargetSystemSpecStorage(ArrayRef<TargetDeviceSpecInterface> entries)
       : entries(entries) {}
 
   bool operator==(const KeyTy &key) const { return key == entries; }
 
-  static TargetSystemDescSpecStorage *
+  static TargetSystemSpecStorage *
   construct(AttributeStorageAllocator &allocator, const KeyTy &key) {
-    return new (allocator.allocate<TargetSystemDescSpecStorage>())
-        TargetSystemDescSpecStorage(allocator.copyInto(key));
+    return new (allocator.allocate<TargetSystemSpecStorage>())
+        TargetSystemSpecStorage(allocator.copyInto(key));
   }
 
-  ArrayRef<TargetDeviceDescSpecInterface> entries;
+  ArrayRef<TargetDeviceSpecInterface> entries;
 };
 
-struct CustomTargetSystemDescSpec
-    : public Attribute::AttrBase<CustomTargetSystemDescSpec, Attribute,
-                                 TargetSystemDescSpecStorage,
-                                 TargetSystemDescSpecInterface::Trait> {
+struct CustomTargetSystemSpec
+    : public Attribute::AttrBase<CustomTargetSystemSpec, Attribute,
+                                 TargetSystemSpecStorage,
+                                 TargetSystemSpecInterface::Trait> {
   MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(CustomDataLayoutSpec)
 
   using Base::Base;
 
-  static constexpr StringLiteral name = "test.custom_target_system_desc_spec";
+  static constexpr StringLiteral name = "test.custom_target_system_spec";
 
-  static CustomTargetSystemDescSpec
-  get(MLIRContext *ctx, ArrayRef<TargetDeviceDescSpecInterface> entries) {
+  static CustomTargetSystemSpec
+  get(MLIRContext *ctx, ArrayRef<TargetDeviceSpecInterface> entries) {
     return Base::get(ctx, entries);
   }
-  TargetDeviceDescSpecListRef getEntries() const { return getImpl()->entries; }
+  TargetDeviceSpecListRef getEntries() const { return getImpl()->entries; }
   LogicalResult verifySpec(Location loc) { return success(); }
-  std::optional<TargetDeviceDescSpecInterface>
-  getDeviceDescForDeviceID(uint32_t deviceID) {
-    for (TargetDeviceDescSpecInterface entry : getEntries()) {
+  std::optional<TargetDeviceSpecInterface>
+  getDeviceSpecForDeviceID(TargetDeviceSpecInterface::DeviceID deviceID) {
+    for (TargetDeviceSpecInterface entry : getEntries()) {
       if (entry.getDeviceID() == deviceID)
         return entry;
     }
     return std::nullopt;
   }
-  StringAttr getDeviceIDIdentifier() {
-    return Builder(getContext()).getStringAttr(DLTIDialect::kTargetDeviceIDKey);
-  }
-  StringAttr getDeviceTypeIdentifier() {
-    return Builder(getContext())
-        .getStringAttr(DLTIDialect::kTargetDeviceTypeKey);
-  }
-  StringAttr getMaxVectorOpWidthIdentifier() {
-    return Builder(getContext())
-        .getStringAttr(DLTIDialect::kTargetDeviceMaxVectorOpWidthKey);
-  }
-  StringAttr getL1CacheSizeInBytesIdentifier() {
-    return Builder(getContext())
-        .getStringAttr(DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey);
-  }
 };
 
 /// A type subject to data layout that exits the program if it is queried more
@@ -259,8 +244,8 @@ struct OpWithLayout : public Op<OpWithLayout, DataLayoutOpInterface::Trait> {
     return getOperation()->getAttrOfType<DataLayoutSpecInterface>(kAttrName);
   }
 
-  TargetSystemDescSpecInterface getTargetSystemDescSpec() {
-    return getOperation()->getAttrOfType<TargetSystemDescSpecInterface>(
+  TargetSystemSpecInterface getTargetSystemSpec() {
+    return getOperation()->getAttrOfType<TargetSystemSpecInterface>(
         kTargetSystemDescAttrName);
   }
 
@@ -311,8 +296,8 @@ struct OpWith7BitByte
     return getOperation()->getAttrOfType<DataLayoutSpecInterface>(kAttrName);
   }
 
-  TargetSystemDescSpecInterface getTargetSystemDescSpec() {
-    return getOperation()->getAttrOfType<TargetSystemDescSpecInterface>(
+  TargetSystemSpecInterface getTargetSystemSpec() {
+    return getOperation()->getAttrOfType<TargetSystemSpecInterface>(
         kTargetSystemDescAttrName);
   }
 
@@ -387,27 +372,27 @@ struct DLTargetSystemDescTestDialect : Dialect {
       : Dialect(getDialectNamespace(), ctx,
                 TypeID::get<DLTargetSystemDescTestDialect>()) {
     ctx->getOrLoadDialect<DLTIDialect>();
-    addAttributes<CustomTargetSystemDescSpec>();
+    addAttributes<CustomTargetSystemSpec>();
   }
   static StringRef getDialectNamespace() { return "dl_target_sys_desc_test"; }
 
   void printAttribute(Attribute attr,
                       DialectAsmPrinter &printer) const override {
-    printer << "target_system_desc_spec<";
-    llvm::interleaveComma(cast<CustomTargetSystemDescSpec>(attr).getEntries(),
+    printer << "target_system_spec<";
+    llvm::interleaveComma(cast<CustomTargetSystemSpec>(attr).getEntries(),
                           printer);
     printer << ">";
   }
 
   Attribute parseAttribute(DialectAsmParser &parser, Type type) const override {
-    bool ok = succeeded(parser.parseKeyword("target_system_desc_spec")) &&
+    bool ok = succeeded(parser.parseKeyword("target_system_spec")) &&
               succeeded(parser.parseLess());
     (void)ok;
     assert(ok);
     if (succeeded(parser.parseOptionalGreater()))
-      return CustomTargetSystemDescSpec::get(parser.getContext(), {});
+      return CustomTargetSystemSpec::get(parser.getContext(), {});
 
-    SmallVector<TargetDeviceDescSpecInterface> entries;
+    SmallVector<TargetDeviceSpecInterface> entries;
     ok = succeeded(parser.parseCommaSeparatedList([&]() {
       entries.emplace_back();
       ok = succeeded(parser.parseAttribute(entries.back()));
@@ -417,7 +402,7 @@ struct DLTargetSystemDescTestDialect : Dialect {
     assert(ok);
     ok = succeeded(parser.parseGreater());
     assert(ok);
-    return CustomTargetSystemDescSpec::get(parser.getContext(), entries);
+    return CustomTargetSystemSpec::get(parser.getContext(), entries);
   }
 };
 
@@ -570,9 +555,9 @@ TEST(DataLayout, SpecWithEntries) {
 
 TEST(DataLayout, SpecWithTargetSystemDescEntries) {
   const char *ir = R"MLIR(
-  module attributes { dl_target_sys_desc_test.target_system_desc_spec =
-    #dl_target_sys_desc_test.target_system_desc_spec<
-      #dlti.target_device_desc_spec<
+  module attributes { dl_target_sys_desc_test.target_system_spec =
+    #dl_target_sys_desc_test.target_system_spec<
+      #dlti.target_device_spec<
         #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
         #dlti.dl_entry<"dlti.device_type", "CPU">,
         #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>,

>From 187e0c24f2ac7ae29b9db36e634ab54d14bb8a16 Mon Sep 17 00:00:00 2001
From: Niranjan Hasabnis <niranjan.hasabnis at intel.com>
Date: Mon, 3 Jun 2024 23:15:59 -0700
Subject: [PATCH 5/7] Addressing review comments

Representing TargetSystemSpec as a set of key-value pairs where key is
the DeviceID (string) and the value is TargetDeviceSpec.
---
 mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td   |  57 ++----
 mlir/include/mlir/Dialect/DLTI/DLTIBase.td    |   6 -
 .../mlir/Interfaces/DataLayoutInterfaces.h    |   8 +-
 .../mlir/Interfaces/DataLayoutInterfaces.td   |  35 +---
 mlir/lib/Dialect/DLTI/DLTI.cpp                | 162 ++++++++----------
 mlir/lib/Interfaces/DataLayoutInterfaces.cpp  |  11 +-
 mlir/test/Dialect/DLTI/invalid.mlir           | 141 ++++++---------
 mlir/test/Dialect/DLTI/roundtrip.mlir         |  20 +--
 mlir/test/Dialect/DLTI/valid.mlir             |  70 ++------
 .../Interfaces/DataLayoutInterfacesTest.cpp   |  89 +++++++---
 10 files changed, 243 insertions(+), 356 deletions(-)

diff --git a/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td b/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
index 7f45c4acd4164..0f55558dcca27 100644
--- a/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
+++ b/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
@@ -116,24 +116,21 @@ def DLTI_TargetSystemSpecAttr :
   }];
   let description = [{
     A system specification describes the overall system containing
-    multiple devices, with each device having a unique ID
+    multiple devices, with each device having a unique ID (string)
     and its corresponding TargetDeviceSpec object.
 
     Example:
           dlti.target_system_spec =
-            #dlti.target_device_spec<
-              #dlti.dl_entry<"dlti.device_id", 0: ui32>,
-              #dlti.dl_entry<"dlti.device_type", "CPU">>,
-            #dlti.target_device_spec<
-              #dlti.dl_entry<"dlti.device_id", 1: ui32>,
-              #dlti.dl_entry<"dlti.device_type", "GPU">,
-              #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>,
-            #dlti.target_device_spec<
-              #dlti.dl_entry<"dlti.device_id", 2: ui32>,
-              #dlti.dl_entry<"dlti.device_type", "XPU">>>
+           #dlti.target_system_spec<
+            "CPU": #dlti.target_device_spec<
+                    #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
+            "GPU": #dlti.target_device_spec<
+                    #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>,
+            "XPU": #dlti.target_device_spec<
+                    #dlti.dl_entry<"dlti.max_vector_op_width", 4096 : ui32>>>
   }];
   let parameters = (ins
-    ArrayRefParameter<"TargetDeviceSpecInterface", "">:$entries
+    ArrayRefParameter<"DeviceIDTargetDeviceSpecPair", "">:$entries
   );
   let mnemonic = "target_system_spec";
   let genVerifyDecl = 1;
@@ -142,15 +139,15 @@ def DLTI_TargetSystemSpecAttr :
     /// Return the device specification that matches the given device ID
     std::optional<TargetDeviceSpecInterface>
     getDeviceSpecForDeviceID(
-      TargetDeviceSpecInterface::DeviceID deviceID);
+      TargetSystemSpecInterface::DeviceID deviceID);
   }];
   let extraClassDefinition = [{
     std::optional<TargetDeviceSpecInterface>
     $cppClass::getDeviceSpecForDeviceID(
-        TargetDeviceSpecInterface::DeviceID deviceID) {
-      for (TargetDeviceSpecInterface entry : getEntries()) {
-        if (entry.getDeviceID() == deviceID)
-          return entry;
+        TargetSystemSpecInterface::DeviceID deviceID) {
+      for (const auto& entry : getEntries()) {
+        if (entry.first == deviceID)
+          return entry.second;
       }
       return std::nullopt;
     }
@@ -173,15 +170,12 @@ def DLTI_TargetDeviceSpecAttr :
   }];
   let description = [{
     Each device specification describes a single device and its
-    hardware properties. Each device specification must have a device_id
-    and a device_type. In addition, the specification can contain any number
+    hardware properties. Each device specification can contain any number
     of optional hardware properties (e.g., max_vector_op_width below).
 
     Example:
       #dlti.target_device_spec<
-            #dlti.dl_entry<"dlti.device_id", 1: ui32>,
-            #dlti.dl_entry<"dlti.device_type", "GPU">,
-            #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>
+        #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>
   }];
   let parameters = (ins
     ArrayRefParameter<"DataLayoutEntryInterface", "">:$entries
@@ -190,28 +184,12 @@ def DLTI_TargetDeviceSpecAttr :
   let genVerifyDecl = 1;
   let assemblyFormat = "`<` $entries `>`";
   let extraClassDeclaration = [{
-    /// Returns the device ID identifier.
-    StringAttr getDeviceIDIdentifier();
-
-    /// Returns the device type identifier.
-    StringAttr getDeviceTypeIdentifier();
-
     /// Returns max vector op width identifier.
     StringAttr getMaxVectorOpWidthIdentifier();
 
     /// Returns L1 cache size identifier
     StringAttr getL1CacheSizeInBytesIdentifier();
 
-    /// Returns the interface spec for device ID
-    /// Since we verify that the spec contains device ID the function
-    /// will return a valid spec.
-    DataLayoutEntryInterface getSpecForDeviceID();
-
-    /// Returns the interface spec for device type
-    /// Since we verify that the spec contains device type the function
-    /// will return a valid spec.
-    DataLayoutEntryInterface getSpecForDeviceType();
-
     /// Returns the interface spec for max vector op width
     /// Since max vector op width is an optional property, this function will
     /// return a valid spec if the property is defined, otherwise it
@@ -223,9 +201,6 @@ def DLTI_TargetDeviceSpecAttr :
     /// return a valid spec if the property is defined, otherwise it
     /// will return an empty spec.
     DataLayoutEntryInterface getSpecForL1CacheSizeInBytes();
-
-    /// Return the value of device ID
-    TargetDeviceSpecInterface::DeviceID getDeviceID();
   }];
 }
 
diff --git a/mlir/include/mlir/Dialect/DLTI/DLTIBase.td b/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
index c4e37db232ddb..bf4f9f68c3f02 100644
--- a/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
+++ b/mlir/include/mlir/Dialect/DLTI/DLTIBase.td
@@ -57,12 +57,6 @@ def DLTI_Dialect : Dialect {
     kDataLayoutStackAlignmentKey = "dlti.stack_alignment";
 
     // Constants used in target description part of DLTI.
-    constexpr const static ::llvm::StringLiteral
-    kTargetDeviceIDKey = "dlti.device_id";
-
-    constexpr const static ::llvm::StringLiteral
-    kTargetDeviceTypeKey = "dlti.device_type";
-
     constexpr const static ::llvm::StringLiteral
     kTargetDeviceMaxVectorOpWidthKey = "dlti.max_vector_op_width";
 
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
index f5bf63a5b5c90..7c4de95806a76 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
@@ -31,6 +31,10 @@ using DataLayoutEntryKey = llvm::PointerUnion<Type, StringAttr>;
 using DataLayoutEntryList = llvm::SmallVector<DataLayoutEntryInterface, 4>;
 using DataLayoutEntryListRef = llvm::ArrayRef<DataLayoutEntryInterface>;
 using TargetDeviceSpecListRef = llvm::ArrayRef<TargetDeviceSpecInterface>;
+using DeviceIDTargetDeviceSpecPair =
+    std::pair<StringAttr, TargetDeviceSpecInterface>;
+using DeviceIDTargetDeviceSpecPairListRef =
+    llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>;
 class DataLayoutOpInterface;
 class DataLayoutSpecInterface;
 class ModuleOp;
@@ -246,12 +250,12 @@ class DataLayout {
   /// Returns for max vector op width if the property is defined for the given
   /// device ID, otherwise return std::nullopt.
   std::optional<uint32_t>
-      getMaxVectorOpWidth(TargetDeviceSpecInterface::DeviceID) const;
+      getMaxVectorOpWidth(TargetSystemSpecInterface::DeviceID) const;
 
   /// Returns for L1 cache size if the property is defined for the given
   /// device ID, otherwise return std::nullopt.
   std::optional<uint32_t>
-      getL1CacheSizeInBytes(TargetDeviceSpecInterface::DeviceID) const;
+      getL1CacheSizeInBytes(TargetSystemSpecInterface::DeviceID) const;
 
 private:
   /// Combined layout spec at the given scope.
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
index 1d4ede62a337d..4a4e135077737 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
@@ -238,20 +238,6 @@ def TargetDeviceSpecInterface : AttrInterface<"TargetDeviceSpecInterface"> {
       /*methodBody=*/"",
       /*defaultImplementation=*/[{ return ::mlir::success(); }]
     >,
-    InterfaceMethod<
-      /*description=*/"Returns the entry related to Device ID. The function"
-                      "will crash if the entry is missing.",
-      /*retTy=*/"::mlir::DataLayoutEntryInterface",
-      /*methodName=*/"getSpecForDeviceID",
-      /*args=*/(ins)
-    >,
-    InterfaceMethod<
-      /*description=*/"Returns the entry related to Device Type. "
-                      "The function will crash if the entry is missing.",
-      /*retTy=*/"::mlir::DataLayoutEntryInterface",
-      /*methodName=*/"getSpecForDeviceType",
-      /*args=*/(ins)
-    >,
     InterfaceMethod<
       /*description=*/"Returns the entry related to the given identifier, if "
                       "present. Otherwise, return empty spec.",
@@ -265,19 +251,8 @@ def TargetDeviceSpecInterface : AttrInterface<"TargetDeviceSpecInterface"> {
       /*retTy=*/"::mlir::DataLayoutEntryInterface",
       /*methodName=*/"getSpecForL1CacheSizeInBytes",
       /*args=*/(ins)
-    >,
-    InterfaceMethod<
-      /*description=*/"Returns the entry related to the given identifier, if "
-                      "present.",
-      /*retTy=*/"uint32_t",
-      /*methodName=*/"getDeviceID",
-      /*args=*/(ins)
-    >,
+    >
   ];
-
-  let extraClassDeclaration = [{
-    using DeviceID = uint32_t;
-  }];
 }
 
 def TargetSystemSpecInterface : AttrInterface<"TargetSystemSpecInterface"> {
@@ -300,7 +275,7 @@ def TargetSystemSpecInterface : AttrInterface<"TargetSystemSpecInterface"> {
   let methods = [
     InterfaceMethod<
       /*description=*/"Returns the list of layout entries.",
-      /*retTy=*/"llvm::ArrayRef<::mlir::TargetDeviceSpecInterface>",
+      /*retTy=*/"llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>",
       /*methodName=*/"getEntries",
       /*args=*/(ins)
     >,
@@ -309,7 +284,7 @@ def TargetSystemSpecInterface : AttrInterface<"TargetSystemSpecInterface"> {
                       "ID",
       /*retTy=*/"std::optional<::mlir::TargetDeviceSpecInterface>",
       /*methodName=*/"getDeviceSpecForDeviceID",
-      /*args=*/(ins "TargetDeviceSpecInterface::DeviceID":$deviceID)
+      /*args=*/(ins "StringAttr":$deviceID)
     >,
     InterfaceMethod<
       /*description=*/"Verifies the validity of the specification and "
@@ -323,6 +298,10 @@ def TargetSystemSpecInterface : AttrInterface<"TargetSystemSpecInterface"> {
       }]
     >
   ];
+
+  let extraClassDeclaration = [{
+    using DeviceID = StringAttr;
+  }];
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/mlir/lib/Dialect/DLTI/DLTI.cpp b/mlir/lib/Dialect/DLTI/DLTI.cpp
index 23d40e7f4fd51..7c2fb94eb32a3 100644
--- a/mlir/lib/Dialect/DLTI/DLTI.cpp
+++ b/mlir/lib/Dialect/DLTI/DLTI.cpp
@@ -239,6 +239,35 @@ DataLayoutSpecAttr::combineWith(ArrayRef<DataLayoutSpecInterface> specs) const {
   return DataLayoutSpecAttr::get(getContext(), entries);
 }
 
+StringAttr
+DataLayoutSpecAttr::getEndiannessIdentifier(MLIRContext *context) const {
+  return Builder(context).getStringAttr(DLTIDialect::kDataLayoutEndiannessKey);
+}
+
+StringAttr
+DataLayoutSpecAttr::getAllocaMemorySpaceIdentifier(MLIRContext *context) const {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kDataLayoutAllocaMemorySpaceKey);
+}
+
+StringAttr DataLayoutSpecAttr::getProgramMemorySpaceIdentifier(
+    MLIRContext *context) const {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kDataLayoutProgramMemorySpaceKey);
+}
+
+StringAttr
+DataLayoutSpecAttr::getGlobalMemorySpaceIdentifier(MLIRContext *context) const {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kDataLayoutGlobalMemorySpaceKey);
+}
+
+StringAttr
+DataLayoutSpecAttr::getStackAlignmentIdentifier(MLIRContext *context) const {
+  return Builder(context).getStringAttr(
+      DLTIDialect::kDataLayoutStackAlignmentKey);
+}
+
 /// Parses an attribute with syntax
 ///   attr ::= `#target.` `dl_spec` `<` attr-list? `>`
 ///   attr-list ::= attr
@@ -271,14 +300,48 @@ void DataLayoutSpecAttr::print(AsmPrinter &os) const {
 // TargetDeviceSpecAttr
 //===----------------------------------------------------------------------===//
 
+namespace mlir {
+template <>
+struct FieldParser<DeviceIDTargetDeviceSpecPair> {
+  static FailureOr<DeviceIDTargetDeviceSpecPair> parse(AsmParser &parser) {
+    std::string deviceID;
+
+    if (failed(parser.parseString(&deviceID))) {
+      parser.emitError(parser.getCurrentLocation())
+          << "DeviceID is missing, or is not of string type";
+      return failure();
+    }
+
+    if (failed(parser.parseColon())) {
+      parser.emitError(parser.getCurrentLocation()) << "Missing colon";
+      return failure();
+    }
+
+    auto target_device_spec =
+        FieldParser<TargetDeviceSpecInterface>::parse(parser);
+    if (failed(target_device_spec)) {
+      parser.emitError(parser.getCurrentLocation())
+          << "Error in parsing target device spec";
+      return failure();
+    }
+
+    return std::make_pair(parser.getBuilder().getStringAttr(deviceID),
+                          *target_device_spec);
+  }
+};
+
+inline AsmPrinter &operator<<(AsmPrinter &printer,
+                              DeviceIDTargetDeviceSpecPair param) {
+  return printer << param.first << " : " << param.second;
+}
+
+} // namespace mlir
+
 LogicalResult
 TargetDeviceSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
                              ArrayRef<DataLayoutEntryInterface> entries) {
   // Entries in tdd_spec can only have StringAttr as key. It does not support
   // type as a key. Hence not reusing DataLayoutEntryInterface::verify.
-  bool targetDeviceIDKeyPresentAndValid = false;
-  bool targetDeviceTypeKeyPresentAndValid = false;
-
   DenseSet<StringAttr> ids;
   for (DataLayoutEntryInterface entry : entries) {
     if (auto type = llvm::dyn_cast_if_present<Type>(entry.getKey())) {
@@ -291,21 +354,9 @@ TargetDeviceSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
         return emitError() << "repeated layout entry key: " << id.getValue();
     }
 
-    // check that Device ID and Device Type are present.
+    // Check that required keys are of right type.
     StringRef entryName = entry.getKey().get<StringAttr>().strref();
-    if (entryName == DLTIDialect::kTargetDeviceIDKey) {
-      // Also check the type of the value.
-      IntegerAttr value =
-          llvm::dyn_cast_if_present<IntegerAttr>(entry.getValue());
-      if (value && value.getType().isUnsignedInteger(32)) {
-        targetDeviceIDKeyPresentAndValid = true;
-      }
-    } else if (entryName == DLTIDialect::kTargetDeviceTypeKey) {
-      // Also check the type of the value.
-      if (auto value = llvm::dyn_cast<StringAttr>(entry.getValue())) {
-        targetDeviceTypeKeyPresentAndValid = true;
-      }
-    } else if (entryName == DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey) {
+    if (entryName == DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey) {
       IntegerAttr value =
           llvm::dyn_cast_if_present<IntegerAttr>(entry.getValue());
       if (!value || !value.getType().isUnsignedInteger(32))
@@ -325,30 +376,9 @@ TargetDeviceSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
     }
   }
 
-  // check that both DeviceID and DeviceType are present
-  // and are of correct type.
-  if (!targetDeviceIDKeyPresentAndValid) {
-    return emitError() << "target_device_spec requires key: "
-                       << DLTIDialect::kTargetDeviceIDKey
-                       << " and its value of ui32 type";
-  }
-  if (!targetDeviceTypeKeyPresentAndValid) {
-    return emitError() << "target_device_spec requires key: "
-                       << DLTIDialect::kTargetDeviceTypeKey
-                       << " and its value of string type";
-  }
-
   return success();
 }
 
-StringAttr TargetDeviceSpecAttr::getDeviceIDIdentifier() {
-  return Builder(getContext()).getStringAttr(DLTIDialect::kTargetDeviceIDKey);
-}
-
-StringAttr TargetDeviceSpecAttr::getDeviceTypeIdentifier() {
-  return Builder(getContext()).getStringAttr(DLTIDialect::kTargetDeviceTypeKey);
-}
-
 StringAttr TargetDeviceSpecAttr::getMaxVectorOpWidthIdentifier() {
   return Builder(getContext())
       .getStringAttr(DLTIDialect::kTargetDeviceMaxVectorOpWidthKey);
@@ -359,14 +389,6 @@ StringAttr TargetDeviceSpecAttr::getL1CacheSizeInBytesIdentifier() {
       .getStringAttr(DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey);
 }
 
-DataLayoutEntryInterface TargetDeviceSpecAttr::getSpecForDeviceID() {
-  return getSpecForIdentifier(getDeviceIDIdentifier());
-}
-
-DataLayoutEntryInterface TargetDeviceSpecAttr::getSpecForDeviceType() {
-  return getSpecForIdentifier(getDeviceTypeIdentifier());
-}
-
 DataLayoutEntryInterface TargetDeviceSpecAttr::getSpecForMaxVectorOpWidth() {
   return getSpecForIdentifier(getMaxVectorOpWidthIdentifier());
 }
@@ -375,27 +397,24 @@ DataLayoutEntryInterface TargetDeviceSpecAttr::getSpecForL1CacheSizeInBytes() {
   return getSpecForIdentifier(getL1CacheSizeInBytesIdentifier());
 }
 
-TargetDeviceSpecInterface::DeviceID TargetDeviceSpecAttr::getDeviceID() {
-  DataLayoutEntryInterface entry = getSpecForDeviceID();
-  return llvm::cast<IntegerAttr>(entry.getValue()).getValue().getZExtValue();
-}
-
 //===----------------------------------------------------------------------===//
 // TargetSystemSpecAttr
 //===----------------------------------------------------------------------===//
 
 LogicalResult
 TargetSystemSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
-                             ArrayRef<TargetDeviceSpecInterface> entries) {
-  DenseSet<uint32_t> device_ids;
+                             ArrayRef<DeviceIDTargetDeviceSpecPair> entries) {
+  DenseSet<TargetSystemSpecInterface::DeviceID> device_ids;
+
+  for (const auto &entry : entries) {
+    TargetDeviceSpecInterface tdd_spec = entry.second;
 
-  for (TargetDeviceSpecInterface tdd_spec : entries) {
     // First verify that a target device spec is valid.
     if (failed(TargetDeviceSpecAttr::verify(emitError, tdd_spec.getEntries())))
       return failure();
 
     // Check that device IDs are unique across all entries.
-    uint32_t device_id = tdd_spec.getDeviceID();
+    TargetSystemSpecInterface::DeviceID device_id = entry.first;
     if (!device_ids.insert(device_id).second) {
       return emitError() << "repeated Device ID in dlti.target_system_spec: "
                          << device_id;
@@ -404,35 +423,6 @@ TargetSystemSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
   return success();
 }
 
-StringAttr
-DataLayoutSpecAttr::getEndiannessIdentifier(MLIRContext *context) const {
-  return Builder(context).getStringAttr(DLTIDialect::kDataLayoutEndiannessKey);
-}
-
-StringAttr
-DataLayoutSpecAttr::getAllocaMemorySpaceIdentifier(MLIRContext *context) const {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kDataLayoutAllocaMemorySpaceKey);
-}
-
-StringAttr DataLayoutSpecAttr::getProgramMemorySpaceIdentifier(
-    MLIRContext *context) const {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kDataLayoutProgramMemorySpaceKey);
-}
-
-StringAttr
-DataLayoutSpecAttr::getGlobalMemorySpaceIdentifier(MLIRContext *context) const {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kDataLayoutGlobalMemorySpaceKey);
-}
-
-StringAttr
-DataLayoutSpecAttr::getStackAlignmentIdentifier(MLIRContext *context) const {
-  return Builder(context).getStringAttr(
-      DLTIDialect::kDataLayoutStackAlignmentKey);
-}
-
 //===----------------------------------------------------------------------===//
 // DLTIDialect
 //===----------------------------------------------------------------------===//
@@ -483,9 +473,7 @@ class SystemDescSpecInterface : public DataLayoutDialectInterface {
       StringRef entryName = dl_entry.getKey().get<StringAttr>().strref();
       // Check that the key name is known to us. Although, we may allow keys
       // unknown to us.
-      if (entryName != DLTIDialect::kTargetDeviceIDKey &&
-          entryName != DLTIDialect::kTargetDeviceTypeKey &&
-          entryName != DLTIDialect::kTargetDeviceMaxVectorOpWidthKey &&
+      if (entryName != DLTIDialect::kTargetDeviceMaxVectorOpWidthKey &&
           entryName != DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey)
         return emitError(loc) << "unknown target desc key name: " << entryName;
     }
diff --git a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
index 3456b804b9800..04999e8af6d09 100644
--- a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
+++ b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
@@ -678,7 +678,7 @@ uint64_t mlir::DataLayout::getStackAlignment() const {
 }
 
 std::optional<uint32_t> mlir::DataLayout::getMaxVectorOpWidth(
-    TargetDeviceSpecInterface::DeviceID deviceID) const {
+    TargetSystemSpecInterface::DeviceID deviceID) const {
   checkValid();
   DataLayoutEntryInterface entry;
   if (originalTargetSystemDesc) {
@@ -697,7 +697,7 @@ std::optional<uint32_t> mlir::DataLayout::getMaxVectorOpWidth(
 }
 
 std::optional<uint32_t> mlir::DataLayout::getL1CacheSizeInBytes(
-    TargetDeviceSpecInterface::DeviceID deviceID) const {
+    TargetSystemSpecInterface::DeviceID deviceID) const {
   checkValid();
   DataLayoutEntryInterface entry;
   if (originalTargetSystemDesc) {
@@ -823,15 +823,16 @@ LogicalResult
 mlir::detail::verifyTargetSystemSpec(TargetSystemSpecInterface spec,
                                      Location loc) {
   DenseMap<StringAttr, DataLayoutEntryInterface> device_desc_keys;
-  DenseSet<TargetDeviceSpecInterface::DeviceID> device_ids;
-  for (TargetDeviceSpecInterface tdd_spec : spec.getEntries()) {
+  DenseSet<TargetSystemSpecInterface::DeviceID> device_ids;
+  for (const auto &entry : spec.getEntries()) {
+    TargetDeviceSpecInterface tdd_spec = entry.second;
     // First, verify individual target device desc specs.
     if (failed(tdd_spec.verifyEntry(loc)))
       return failure();
 
     // Check that device IDs are unique across all entries.
     MLIRContext *context = tdd_spec.getContext();
-    TargetDeviceSpecInterface::DeviceID device_id = tdd_spec.getDeviceID();
+    TargetSystemSpecInterface::DeviceID device_id = entry.first;
     if (!device_ids.insert(device_id).second) {
       return failure();
     }
diff --git a/mlir/test/Dialect/DLTI/invalid.mlir b/mlir/test/Dialect/DLTI/invalid.mlir
index 28be8d37a50bf..0f1558100da71 100644
--- a/mlir/test/Dialect/DLTI/invalid.mlir
+++ b/mlir/test/Dialect/DLTI/invalid.mlir
@@ -98,135 +98,100 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<#dlti.dl_entry<"unknown.unknown
 
 // -----
 
-// expected-error at below {{invalid kind of attribute specified}}
-// expected-error at below {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+// expected-error at below {{expected string}}
+// expected-error at below {{DeviceID is missing, or is not of string type}}
+// expected-error at below {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>`}}
 "test.unknown_op"() { dlti.target_system_spec = #dlti.target_system_spec<[]> } : () -> ()
 
 // -----
 
 module attributes {
-  // expected-error at +3 {{target_device_spec requires key: dlti.device_id and its value of ui32 type}}
-  // expected-error at +4 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
-  dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_type", "CPU">> 
-  >} {}
-
-// -----
-
-module attributes {
-  // expected-error at +3 {{target_device_spec requires key: dlti.device_type and its value of string type}}
-  // expected-error at +4 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
-  dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0: ui32>> 
-  >} {}
-
-// -----
-
-module attributes {
-  // expected-error at +3 {{target_device_spec requires key: dlti.device_id and its value of ui32 type}}
-  // expected-error at +4 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
-  dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0: i32>> 
-  >} {}
-
-// -----
-
-module attributes {
-  // expected-error at +3 {{target_device_spec requires key: dlti.device_type and its value of string type}}
-  // expected-error at +5 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  // Device ID is missing
+  //
+  // expected-error at +4 {{expected string}}
+  // expected-error at +3 {{DeviceID is missing, or is not of string type}}
+  // expected-error at +2 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>`}}
   dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-      #dlti.dl_entry<"dlti.device_type", 0: i32>> 
+    : #dlti.target_device_spec<
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>> 
   >} {}
 
 // -----
 
 module attributes {
-  // expected-error at +3 {{repeated layout entry key: dlti.device_id}}
-  // expected-error at +7 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  // Device ID is wrong type
+  //
+  // expected-error at +4 {{expected string}}
+  // expected-error at +3 {{DeviceID is missing, or is not of string type}}
+  // expected-error at +2 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>`}}
   dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">,
-      #dlti.dl_entry<"dlti.L1_cache_size", 4096 : i32>>
+    0: #dlti.target_device_spec<
+        #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: i32>> 
   >} {}
 
 // -----
 
 module attributes {
-  // expected-error at +3 {{repeated layout entry key: dlti.device_type}}
-  // expected-error at +7 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  // Repeated Device ID
+  //
+  // expected-error at below {{repeated Device ID in dlti.target_system_spec: "CPU"}}
   dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">,
-      #dlti.dl_entry<"dlti.device_type", "GPU">,
-      #dlti.dl_entry<"dlti.L1_cache_size", 4096 : i32>>
+    "CPU": #dlti.target_device_spec<
+            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
+    "CPU": #dlti.target_device_spec<
+            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192 : ui32>>
   >} {}
 
 // -----
 
 module attributes {
-  // expected-error at +3 {{target_device_spec requires value of key: dlti.L1_cache_size_in_bytes to be of ui32 type}}
-  // expected-error at +6 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  // L1_cache_size_in_bytes is of incorrect type
+  //
+  // expected-error at +4 {{target_device_spec requires value of key: dlti.L1_cache_size_in_bytes to be of ui32 type}}
+  // expected-error at +5 {{Error in parsing target device spec}}
+  // expected-error at +4 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>`}}
   dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">,
-      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096.1 : f32>>
+    "CPU": #dlti.target_device_spec<
+            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096.1 : f32>>
   >} {}
 
 // -----
 
 module attributes {
-  // expected-error at +3 {{target_device_spec requires value of key: dlti.max_vector_op_width to be of ui32 type}}
-  // expected-error at +6 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  // max_vector_op_width is of incorrect type
+  //
+  // expected-error at +4 {{target_device_spec requires value of key: dlti.max_vector_op_width to be of ui32 type}}
+  // expected-error at +5 {{Error in parsing target device spec}}
+  // expected-error at +4 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>`}}
   dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">,
-      #dlti.dl_entry<"dlti.max_vector_op_width", 4096.1 : f32>>
+    "CPU": #dlti.target_device_spec<
+            #dlti.dl_entry<"dlti.max_vector_op_width", 4096.1 : f32>>
   >} {}
 
 // -----
 
 module attributes {
-  // expected-error at +3 {{unknown target device spec key name: dlti.L2_cache_size_in_bytes}}
-  // expected-error at +6 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  // Repeated DLTI entry
+  //
+  // expected-error at +4 {{repeated layout entry key: dlti.L1_cache_size_in_bytes}}
+  // expected-error at +6 {{Error in parsing target device spec}}
+  // expected-error at +5 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>`}}
   dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">,
-      #dlti.dl_entry<"dlti.L2_cache_size_in_bytes", 4096 : i32>>
+    "CPU": #dlti.target_device_spec<
+            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>,
+            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192 : ui32>>
   >} {}
 
 // -----
 
 module attributes {
-  // expected-error at +3 {{unknown target device spec key name: dlti.unknown_key}}
-  // expected-error at +6 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<TargetDeviceSpecInterface>`}}
+  // Unsupported dlti key
+  //
+  // expected-error at +4 {{unknown target device spec key name: dlti.unknown_key}}
+  // expected-error at +5 {{Error in parsing target device spec}}
+  // expected-error at +4 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>`}}
   dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">,
-      #dlti.dl_entry<"dlti.unknown_key", 42>>
+    "CPU": #dlti.target_device_spec<
+            #dlti.dl_entry<"dlti.unknown_key", 42>>
   >} {}
 
-// -----
-
-module attributes {
-  // unexpected-error at below {{repeated Device ID in dlti.target_system_spec: 0}}
-  dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">>,
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">>
-  >} {}
-  
\ No newline at end of file
diff --git a/mlir/test/Dialect/DLTI/roundtrip.mlir b/mlir/test/Dialect/DLTI/roundtrip.mlir
index ccd80cda6f75f..277187a2b73c0 100644
--- a/mlir/test/Dialect/DLTI/roundtrip.mlir
+++ b/mlir/test/Dialect/DLTI/roundtrip.mlir
@@ -57,25 +57,17 @@
 // A valid target system description
 // CHECK: module attributes {
 // CHECK-SAME: dlti.target_system_spec = #dlti.target_system_spec<
-// CHECK-SAME:  #dlti.target_device_spec<
-// CHECK-SAME:   #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-// CHECK-SAME:   #dlti.dl_entry<"dlti.device_type", "CPU">,
+// CHECK-SAME:  "CPU" : #dlti.target_device_spec<
 // CHECK-SAME:   #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
-// CHECK-SAME: #dlti.target_device_spec<
-// CHECK-SAME:  #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
-// CHECK-SAME:  #dlti.dl_entry<"dlti.device_type", "GPU">,
-// CHECK-SAME:  #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
+// CHECK-SAME: "GPU" : #dlti.target_device_spec<
+// CHECK-SAME:   #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
 // CHECK-SAME: >} {
 // CHECK: }
 module attributes {
   dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">,
+    "CPU": #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 1: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "GPU">,
+    "GPU": #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.max_vector_op_width", 128: ui32>>
   >} {}
-  
\ No newline at end of file
+ 
diff --git a/mlir/test/Dialect/DLTI/valid.mlir b/mlir/test/Dialect/DLTI/valid.mlir
index dff1434a26f48..6643c32ae5324 100644
--- a/mlir/test/Dialect/DLTI/valid.mlir
+++ b/mlir/test/Dialect/DLTI/valid.mlir
@@ -4,47 +4,17 @@
 
 // CHECK:      module attributes {
 // CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
-// CHECK-SAME:    #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">>,
-// CHECK-SAME:    #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">>
-// CHECK-SAME:  >} {
-// CHECK:        }
-module attributes {
-  dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">>,
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 1: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "GPU">>
-  >} {}
-
-// -----
-
-// CHECK:      module attributes {
-// CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
-// CHECK-SAME:    #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">,
+// CHECK-SAME:    "CPU" : #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
-// CHECK-SAME:    #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">,
+// CHECK-SAME:    "GPU" : #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
 // CHECK-SAME:  >} {
 // CHECK:        }
 module attributes {
   dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">,
+    "CPU": #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 1: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "GPU">,
+    "GPU": #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.max_vector_op_width", 128: ui32>>
   >} {}
 
@@ -52,25 +22,17 @@ module attributes {
 
 // CHECK:      module attributes {
 // CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
-// CHECK-SAME:    #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">,
+// CHECK-SAME:    "CPU" : #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
-// CHECK-SAME:    #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">,
+// CHECK-SAME:    "GPU" : #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192 : ui32>>
 // CHECK-SAME:  >} {
 // CHECK:        }
 module attributes {
   dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">,
+    "CPU": #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 1: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "GPU">,
+    "GPU": #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192: ui32>>
   >} {}
 
@@ -78,24 +40,16 @@ module attributes {
 
 // CHECK:      module attributes {
 // CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
-// CHECK-SAME:    #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "CPU">,
+// CHECK-SAME:    "CPU" : #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>,
-// CHECK-SAME:    #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_id", 1 : ui32>,
-// CHECK-SAME:      #dlti.dl_entry<"dlti.device_type", "GPU">,
+// CHECK-SAME:    "GPU" : #dlti.target_device_spec<
 // CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
 // CHECK-SAME:  >} {
 // CHECK:        }
 module attributes {
   dlti.target_system_spec = #dlti.target_system_spec<
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 0: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "CPU">,
+    "CPU": #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.max_vector_op_width", 64: ui32>>,
-    #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.device_id", 1: ui32>,
-      #dlti.dl_entry<"dlti.device_type", "GPU">,
+    "GPU": #dlti.target_device_spec<
       #dlti.dl_entry<"dlti.max_vector_op_width", 128: ui32>>
   >} {}
diff --git a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
index a0ba54f32a9e3..753cab04621f1 100644
--- a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
+++ b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
@@ -96,9 +96,9 @@ struct CustomDataLayoutSpec
 
 class TargetSystemSpecStorage : public AttributeStorage {
 public:
-  using KeyTy = ArrayRef<TargetDeviceSpecInterface>;
+  using KeyTy = ArrayRef<DeviceIDTargetDeviceSpecPair>;
 
-  TargetSystemSpecStorage(ArrayRef<TargetDeviceSpecInterface> entries)
+  TargetSystemSpecStorage(ArrayRef<DeviceIDTargetDeviceSpecPair> entries)
       : entries(entries) {}
 
   bool operator==(const KeyTy &key) const { return key == entries; }
@@ -109,7 +109,7 @@ class TargetSystemSpecStorage : public AttributeStorage {
         TargetSystemSpecStorage(allocator.copyInto(key));
   }
 
-  ArrayRef<TargetDeviceSpecInterface> entries;
+  ArrayRef<DeviceIDTargetDeviceSpecPair> entries;
 };
 
 struct CustomTargetSystemSpec
@@ -123,16 +123,18 @@ struct CustomTargetSystemSpec
   static constexpr StringLiteral name = "test.custom_target_system_spec";
 
   static CustomTargetSystemSpec
-  get(MLIRContext *ctx, ArrayRef<TargetDeviceSpecInterface> entries) {
+  get(MLIRContext *ctx, ArrayRef<DeviceIDTargetDeviceSpecPair> entries) {
     return Base::get(ctx, entries);
   }
-  TargetDeviceSpecListRef getEntries() const { return getImpl()->entries; }
+  DeviceIDTargetDeviceSpecPairListRef getEntries() const {
+    return getImpl()->entries;
+  }
   LogicalResult verifySpec(Location loc) { return success(); }
   std::optional<TargetDeviceSpecInterface>
-  getDeviceSpecForDeviceID(TargetDeviceSpecInterface::DeviceID deviceID) {
-    for (TargetDeviceSpecInterface entry : getEntries()) {
-      if (entry.getDeviceID() == deviceID)
-        return entry;
+  getDeviceSpecForDeviceID(TargetSystemSpecInterface::DeviceID deviceID) {
+    for (const auto &entry : getEntries()) {
+      if (entry.first == deviceID)
+        return entry.second;
     }
     return std::nullopt;
   }
@@ -365,7 +367,7 @@ struct DLTestDialect : Dialect {
   }
 };
 
-struct DLTargetSystemDescTestDialect : Dialect {
+struct DLTargetSystemDescTestDialect : public Dialect {
   MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(DLTargetSystemDescTestDialect)
 
   explicit DLTargetSystemDescTestDialect(MLIRContext *ctx)
@@ -379,8 +381,9 @@ struct DLTargetSystemDescTestDialect : Dialect {
   void printAttribute(Attribute attr,
                       DialectAsmPrinter &printer) const override {
     printer << "target_system_spec<";
-    llvm::interleaveComma(cast<CustomTargetSystemSpec>(attr).getEntries(),
-                          printer);
+    llvm::interleaveComma(
+        cast<CustomTargetSystemSpec>(attr).getEntries(), printer,
+        [&](const auto &it) { printer << it.first << ":" << it.second; });
     printer << ">";
   }
 
@@ -392,11 +395,36 @@ struct DLTargetSystemDescTestDialect : Dialect {
     if (succeeded(parser.parseOptionalGreater()))
       return CustomTargetSystemSpec::get(parser.getContext(), {});
 
-    SmallVector<TargetDeviceSpecInterface> entries;
+    auto parseDeviceIDTargetDeviceSpecPair =
+        [&](AsmParser &parser) -> FailureOr<DeviceIDTargetDeviceSpecPair> {
+      std::string deviceID;
+      if (failed(parser.parseString(&deviceID))) {
+        parser.emitError(parser.getCurrentLocation())
+            << "DeviceID is missing, or is not of string type";
+        return failure();
+      }
+      if (failed(parser.parseColon())) {
+        parser.emitError(parser.getCurrentLocation()) << "Missing colon";
+        return failure();
+      }
+
+      TargetDeviceSpecInterface target_device_spec;
+      if (failed(parser.parseAttribute(target_device_spec))) {
+        parser.emitError(parser.getCurrentLocation())
+            << "Error in parsing target device spec";
+        return failure();
+      }
+      return std::make_pair(parser.getBuilder().getStringAttr(deviceID),
+                            target_device_spec);
+    };
+
+    SmallVector<DeviceIDTargetDeviceSpecPair> entries;
     ok = succeeded(parser.parseCommaSeparatedList([&]() {
-      entries.emplace_back();
-      ok = succeeded(parser.parseAttribute(entries.back()));
+      auto deviceID_target_device_spec =
+          parseDeviceIDTargetDeviceSpecPair(parser);
+      ok = succeeded(deviceID_target_device_spec);
       assert(ok);
+      entries.push_back(*deviceID_target_device_spec);
       return success();
     }));
     assert(ok);
@@ -466,8 +494,12 @@ TEST(DataLayout, NullSpec) {
   EXPECT_EQ(layout.getGlobalMemorySpace(), Attribute());
   EXPECT_EQ(layout.getStackAlignment(), 0u);
 
-  EXPECT_EQ(layout.getL1CacheSizeInBytes(0 /* device ID*/), std::nullopt);
-  EXPECT_EQ(layout.getMaxVectorOpWidth(0 /* device ID*/), std::nullopt);
+  EXPECT_EQ(layout.getL1CacheSizeInBytes(
+                Builder(&ctx).getStringAttr("CPU" /* device ID*/)),
+            std::nullopt);
+  EXPECT_EQ(layout.getMaxVectorOpWidth(
+                Builder(&ctx).getStringAttr("CPU" /* device ID*/)),
+            std::nullopt);
 }
 
 TEST(DataLayout, EmptySpec) {
@@ -500,8 +532,12 @@ TEST(DataLayout, EmptySpec) {
   EXPECT_EQ(layout.getGlobalMemorySpace(), Attribute());
   EXPECT_EQ(layout.getStackAlignment(), 0u);
 
-  EXPECT_EQ(layout.getL1CacheSizeInBytes(0 /* device ID*/), std::nullopt);
-  EXPECT_EQ(layout.getMaxVectorOpWidth(0 /* device ID*/), std::nullopt);
+  EXPECT_EQ(layout.getL1CacheSizeInBytes(
+                Builder(&ctx).getStringAttr("CPU" /* device ID*/)),
+            std::nullopt);
+  EXPECT_EQ(layout.getMaxVectorOpWidth(
+                Builder(&ctx).getStringAttr("CPU" /* device ID*/)),
+            std::nullopt);
 }
 
 TEST(DataLayout, SpecWithEntries) {
@@ -557,12 +593,9 @@ TEST(DataLayout, SpecWithTargetSystemDescEntries) {
   const char *ir = R"MLIR(
   module attributes { dl_target_sys_desc_test.target_system_spec =
     #dl_target_sys_desc_test.target_system_spec<
-      #dlti.target_device_spec<
-        #dlti.dl_entry<"dlti.device_id", 0 : ui32>,
-        #dlti.dl_entry<"dlti.device_type", "CPU">,
-        #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>,
-        #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>
-      >
+      "CPU": #dlti.target_device_spec<
+              #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>,
+              #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
     > } {}
   )MLIR";
 
@@ -572,9 +605,11 @@ TEST(DataLayout, SpecWithTargetSystemDescEntries) {
 
   OwningOpRef<ModuleOp> module = parseSourceString<ModuleOp>(ir, &ctx);
   DataLayout layout(*module);
-  EXPECT_EQ(layout.getL1CacheSizeInBytes(0 /* device ID*/),
+  EXPECT_EQ(layout.getL1CacheSizeInBytes(
+                Builder(&ctx).getStringAttr("CPU") /* device ID*/),
             std::optional<uint32_t>(4096));
-  EXPECT_EQ(layout.getMaxVectorOpWidth(0 /* device ID*/),
+  EXPECT_EQ(layout.getMaxVectorOpWidth(
+                Builder(&ctx).getStringAttr("CPU") /* device ID*/),
             std::optional<uint32_t>(128));
 }
 

>From 87d1b209b211eaeff45f38994a6115e6f6205380 Mon Sep 17 00:00:00 2001
From: Niranjan Hasabnis <niranjan.hasabnis at intel.com>
Date: Thu, 6 Jun 2024 13:42:51 -0700
Subject: [PATCH 6/7] Addressing review comments

---
 mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td   | 12 ---------
 .../mlir/Interfaces/DataLayoutInterfaces.td   | 22 ++++++++--------
 mlir/lib/Dialect/DLTI/DLTI.cpp                | 25 ++++++++-----------
 mlir/lib/Interfaces/DataLayoutInterfaces.cpp  | 10 +++++---
 mlir/test/Dialect/DLTI/roundtrip.mlir         | 12 ++++-----
 .../Interfaces/DataLayoutInterfacesTest.cpp   |  1 +
 6 files changed, 35 insertions(+), 47 deletions(-)

diff --git a/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td b/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
index 0f55558dcca27..fef003c675281 100644
--- a/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
+++ b/mlir/include/mlir/Dialect/DLTI/DLTIAttrs.td
@@ -189,18 +189,6 @@ def DLTI_TargetDeviceSpecAttr :
 
     /// Returns L1 cache size identifier
     StringAttr getL1CacheSizeInBytesIdentifier();
-
-    /// Returns the interface spec for max vector op width
-    /// Since max vector op width is an optional property, this function will
-    /// return a valid spec if the property is defined, otherwise it
-    /// will return an empty spec.
-    DataLayoutEntryInterface getSpecForMaxVectorOpWidth();
-
-    /// Returns the interface spec for L1 cache size
-    /// Since L1 cache size is an optional property, this function will
-    /// return a valid spec if the property is defined, otherwise it
-    /// will return an empty spec.
-    DataLayoutEntryInterface getSpecForL1CacheSizeInBytes();
   }];
 }
 
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
index 4a4e135077737..49aec01bceae1 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
@@ -239,19 +239,19 @@ def TargetDeviceSpecInterface : AttrInterface<"TargetDeviceSpecInterface"> {
       /*defaultImplementation=*/[{ return ::mlir::success(); }]
     >,
     InterfaceMethod<
-      /*description=*/"Returns the entry related to the given identifier, if "
-                      "present. Otherwise, return empty spec.",
-      /*retTy=*/"::mlir::DataLayoutEntryInterface",
-      /*methodName=*/"getSpecForMaxVectorOpWidth",
-      /*args=*/(ins)
+      /*description=*/"Returns max vector op width identifier. ",
+      /*retTy=*/"::mlir::StringAttr",
+      /*methodName=*/"getMaxVectorOpWidthIdentifier",
+      /*args=*/(ins),
+      /*methodBody=*/""
     >,
     InterfaceMethod<
-      /*description=*/"Returns the entry related to the given identifier, if "
-                      "present. Otherwise, return empty spec.",
-      /*retTy=*/"::mlir::DataLayoutEntryInterface",
-      /*methodName=*/"getSpecForL1CacheSizeInBytes",
-      /*args=*/(ins)
-    >
+      /*description=*/"Returns L1 cache size identifier identifier. ",
+      /*retTy=*/"::mlir::StringAttr",
+      /*methodName=*/"getL1CacheSizeInBytesIdentifier",
+      /*args=*/(ins),
+      /*methodBody=*/""
+    >,
   ];
 }
 
diff --git a/mlir/lib/Dialect/DLTI/DLTI.cpp b/mlir/lib/Dialect/DLTI/DLTI.cpp
index 7c2fb94eb32a3..f598b6220be9f 100644
--- a/mlir/lib/Dialect/DLTI/DLTI.cpp
+++ b/mlir/lib/Dialect/DLTI/DLTI.cpp
@@ -24,7 +24,7 @@ using namespace mlir;
 #include "mlir/Dialect/DLTI/DLTIDialect.cpp.inc"
 
 #define GET_ATTRDEF_CLASSES
-#include <mlir/Dialect/DLTI/DLTIAttrs.cpp.inc>
+#include "mlir/Dialect/DLTI/DLTIAttrs.cpp.inc"
 
 #define DEBUG_TYPE "dlti"
 
@@ -301,6 +301,8 @@ void DataLayoutSpecAttr::print(AsmPrinter &os) const {
 //===----------------------------------------------------------------------===//
 
 namespace mlir {
+/// A FieldParser for key-value pairs of DeviceID-target device spec pairs that
+/// make up a target system spec.
 template <>
 struct FieldParser<DeviceIDTargetDeviceSpecPair> {
   static FailureOr<DeviceIDTargetDeviceSpecPair> parse(AsmParser &parser) {
@@ -340,8 +342,9 @@ inline AsmPrinter &operator<<(AsmPrinter &printer,
 LogicalResult
 TargetDeviceSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
                              ArrayRef<DataLayoutEntryInterface> entries) {
-  // Entries in tdd_spec can only have StringAttr as key. It does not support
-  // type as a key. Hence not reusing DataLayoutEntryInterface::verify.
+  // Entries in a target device spec can only have StringAttr as key. It does
+  // not support type as a key. Hence not reusing
+  // DataLayoutEntryInterface::verify.
   DenseSet<StringAttr> ids;
   for (DataLayoutEntryInterface entry : entries) {
     if (auto type = llvm::dyn_cast_if_present<Type>(entry.getKey())) {
@@ -389,14 +392,6 @@ StringAttr TargetDeviceSpecAttr::getL1CacheSizeInBytesIdentifier() {
       .getStringAttr(DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey);
 }
 
-DataLayoutEntryInterface TargetDeviceSpecAttr::getSpecForMaxVectorOpWidth() {
-  return getSpecForIdentifier(getMaxVectorOpWidthIdentifier());
-}
-
-DataLayoutEntryInterface TargetDeviceSpecAttr::getSpecForL1CacheSizeInBytes() {
-  return getSpecForIdentifier(getL1CacheSizeInBytesIdentifier());
-}
-
 //===----------------------------------------------------------------------===//
 // TargetSystemSpecAttr
 //===----------------------------------------------------------------------===//
@@ -407,10 +402,11 @@ TargetSystemSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
   DenseSet<TargetSystemSpecInterface::DeviceID> device_ids;
 
   for (const auto &entry : entries) {
-    TargetDeviceSpecInterface tdd_spec = entry.second;
+    TargetDeviceSpecInterface target_device_spec = entry.second;
 
     // First verify that a target device spec is valid.
-    if (failed(TargetDeviceSpecAttr::verify(emitError, tdd_spec.getEntries())))
+    if (failed(TargetDeviceSpecAttr::verify(emitError,
+                                            target_device_spec.getEntries())))
       return failure();
 
     // Check that device IDs are unique across all entries.
@@ -462,6 +458,7 @@ class TargetDataLayoutInterface : public DataLayoutDialectInterface {
 } // namespace
 
 namespace {
+/// An interface to check entries of a target device spec.
 class SystemDescSpecInterface : public DataLayoutDialectInterface {
 public:
   using DataLayoutDialectInterface::DataLayoutDialectInterface;
@@ -485,7 +482,7 @@ class SystemDescSpecInterface : public DataLayoutDialectInterface {
 void DLTIDialect::initialize() {
   addAttributes<
 #define GET_ATTRDEF_LIST
-#include <mlir/Dialect/DLTI/DLTIAttrs.cpp.inc>
+#include "mlir/Dialect/DLTI/DLTIAttrs.cpp.inc"
       >();
   addInterfaces<TargetDataLayoutInterface, SystemDescSpecInterface>();
 }
diff --git a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
index 04999e8af6d09..16776ee511590 100644
--- a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
+++ b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
@@ -684,7 +684,8 @@ std::optional<uint32_t> mlir::DataLayout::getMaxVectorOpWidth(
   if (originalTargetSystemDesc) {
     if (auto device =
             originalTargetSystemDesc.getDeviceSpecForDeviceID(deviceID))
-      entry = device->getSpecForMaxVectorOpWidth();
+      entry =
+          device->getSpecForIdentifier(device->getMaxVectorOpWidthIdentifier());
   }
   // Currently I am not caching the results because we do not return
   // default values of these properties. Instead if the property is
@@ -703,7 +704,8 @@ std::optional<uint32_t> mlir::DataLayout::getL1CacheSizeInBytes(
   if (originalTargetSystemDesc) {
     if (auto device =
             originalTargetSystemDesc.getDeviceSpecForDeviceID(deviceID))
-      entry = device->getSpecForL1CacheSizeInBytes();
+      entry = device->getSpecForIdentifier(
+          device->getL1CacheSizeInBytesIdentifier());
   }
   // Currently I am not caching the results because we do not return
   // default values of these properties. Instead if the property is
@@ -831,7 +833,6 @@ mlir::detail::verifyTargetSystemSpec(TargetSystemSpecInterface spec,
       return failure();
 
     // Check that device IDs are unique across all entries.
-    MLIRContext *context = tdd_spec.getContext();
     TargetSystemSpecInterface::DeviceID device_id = entry.first;
     if (!device_ids.insert(device_id).second) {
       return failure();
@@ -842,8 +843,9 @@ mlir::detail::verifyTargetSystemSpec(TargetSystemSpecInterface spec,
       if (auto type = llvm::dyn_cast_if_present<Type>(entry.getKey())) {
         // tdd_spec does not support Type as a key.
         return failure();
-      } else
+      } else {
         device_desc_keys[entry.getKey().get<StringAttr>()] = entry;
+      }
     }
   }
 
diff --git a/mlir/test/Dialect/DLTI/roundtrip.mlir b/mlir/test/Dialect/DLTI/roundtrip.mlir
index 277187a2b73c0..7b8255ad71d4d 100644
--- a/mlir/test/Dialect/DLTI/roundtrip.mlir
+++ b/mlir/test/Dialect/DLTI/roundtrip.mlir
@@ -56,12 +56,12 @@
 
 // A valid target system description
 // CHECK: module attributes {
-// CHECK-SAME: dlti.target_system_spec = #dlti.target_system_spec<
-// CHECK-SAME:  "CPU" : #dlti.target_device_spec<
-// CHECK-SAME:   #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
-// CHECK-SAME: "GPU" : #dlti.target_device_spec<
-// CHECK-SAME:   #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
-// CHECK-SAME: >} {
+// CHECK: dlti.target_system_spec = #dlti.target_system_spec<
+// CHECK:  "CPU" : #dlti.target_device_spec<
+// CHECK:   #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
+// CHECK: "GPU" : #dlti.target_device_spec<
+// CHECK:   #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
+// CHECK: >} {
 // CHECK: }
 module attributes {
   dlti.target_system_spec = #dlti.target_system_spec<
diff --git a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
index 753cab04621f1..4a4900147f7b7 100644
--- a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
+++ b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
@@ -367,6 +367,7 @@ struct DLTestDialect : Dialect {
   }
 };
 
+/// A dialect to test DLTI's target system spec and related attributes
 struct DLTargetSystemDescTestDialect : public Dialect {
   MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(DLTargetSystemDescTestDialect)
 

>From 856426f0563ef7ef7820cd3e0410ab3c8423576d Mon Sep 17 00:00:00 2001
From: Niranjan Hasabnis <niranjan.hasabnis at intel.com>
Date: Fri, 14 Jun 2024 19:13:16 -0700
Subject: [PATCH 7/7] Addressing review comments

---
 .../mlir/Interfaces/DataLayoutInterfaces.h    |  8 +-
 .../mlir/Interfaces/DataLayoutInterfaces.td   |  4 +-
 mlir/lib/Dialect/DLTI/DLTI.cpp                |  8 +-
 mlir/lib/Interfaces/DataLayoutInterfaces.cpp  | 20 ++---
 mlir/test/Dialect/DLTI/invalid.mlir           | 14 ++--
 mlir/test/Dialect/DLTI/valid.mlir             | 78 ++++++++++++++++---
 .../Interfaces/DataLayoutInterfacesTest.cpp   |  4 +-
 7 files changed, 95 insertions(+), 41 deletions(-)

diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
index 7c4de95806a76..b66c8ed3446ec 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
@@ -93,11 +93,11 @@ uint64_t getDefaultStackAlignment(DataLayoutEntryInterface entry);
 
 /// Return max vector op width from the specified DataLayoutEntry. If the
 /// property is missing from the entry, then return std::nullopt.
-std::optional<uint32_t> getMaxVectorOpWidth(DataLayoutEntryInterface entry);
+std::optional<int64_t> getMaxVectorOpWidth(DataLayoutEntryInterface entry);
 
 /// Return L1 cache size in bytes from the specified DataLayoutEntry. If the
 /// property is missing from the entry, then return std::nullopt.
-std::optional<uint32_t> getL1CacheSizeInBytes(DataLayoutEntryInterface entry);
+std::optional<int64_t> getL1CacheSizeInBytes(DataLayoutEntryInterface entry);
 
 /// Given a list of data layout entries, returns a new list containing the
 /// entries with keys having the given type ID, i.e. belonging to the same type
@@ -249,12 +249,12 @@ class DataLayout {
 
   /// Returns for max vector op width if the property is defined for the given
   /// device ID, otherwise return std::nullopt.
-  std::optional<uint32_t>
+  std::optional<int64_t>
       getMaxVectorOpWidth(TargetSystemSpecInterface::DeviceID) const;
 
   /// Returns for L1 cache size if the property is defined for the given
   /// device ID, otherwise return std::nullopt.
-  std::optional<uint32_t>
+  std::optional<int64_t>
       getL1CacheSizeInBytes(TargetSystemSpecInterface::DeviceID) const;
 
 private:
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
index 49aec01bceae1..2ae9d29c2d33c 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
@@ -482,7 +482,7 @@ def DataLayoutOpInterface : OpInterface<"DataLayoutOpInterface"> {
     StaticInterfaceMethod<
       /*description=*/"Returns the max vector op width, if the property is "
                       "defined. Otherwise, it returns std::nullopt.",
-      /*retTy=*/"std::optional<uint32_t>",
+      /*retTy=*/"std::optional<int64_t>",
       /*methodName=*/"getMaxVectorOpWidth",
       /*args=*/(ins "::mlir::DataLayoutEntryInterface":$entry),
       /*methodBody=*/"",
@@ -493,7 +493,7 @@ def DataLayoutOpInterface : OpInterface<"DataLayoutOpInterface"> {
     StaticInterfaceMethod<
       /*description=*/"Returns the L1 cache size in bytes, if the property is "
                       "defined. Otherwise, it returns std::nullopt.",
-      /*retTy=*/"std::optional<uint32_t>",
+      /*retTy=*/"std::optional<int64_t>",
       /*methodName=*/"getL1CacheSizeInBytes",
       /*args=*/(ins "::mlir::DataLayoutEntryInterface":$entry),
       /*methodBody=*/"",
diff --git a/mlir/lib/Dialect/DLTI/DLTI.cpp b/mlir/lib/Dialect/DLTI/DLTI.cpp
index f598b6220be9f..3ea6e57df3acb 100644
--- a/mlir/lib/Dialect/DLTI/DLTI.cpp
+++ b/mlir/lib/Dialect/DLTI/DLTI.cpp
@@ -362,17 +362,17 @@ TargetDeviceSpecAttr::verify(function_ref<InFlightDiagnostic()> emitError,
     if (entryName == DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey) {
       IntegerAttr value =
           llvm::dyn_cast_if_present<IntegerAttr>(entry.getValue());
-      if (!value || !value.getType().isUnsignedInteger(32))
+      if (!value || !value.getType().isInteger())
         return emitError() << "target_device_spec requires value of key: "
                            << DLTIDialect::kTargetDeviceL1CacheSizeInBytesKey
-                           << " to be of ui32 type";
+                           << " to be of integer type";
     } else if (entryName == DLTIDialect::kTargetDeviceMaxVectorOpWidthKey) {
       IntegerAttr value =
           llvm::dyn_cast_if_present<IntegerAttr>(entry.getValue());
-      if (!value || !value.getType().isUnsignedInteger(32))
+      if (!value || !value.getType().isInteger())
         return emitError() << "target_device_spec requires value of key: "
                            << DLTIDialect::kTargetDeviceMaxVectorOpWidthKey
-                           << " to be of ui32 type";
+                           << " to be of integer type";
     } else {
       return emitError() << "unknown target device spec key name: "
                          << entryName;
diff --git a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
index 16776ee511590..fd5bb186172c7 100644
--- a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
+++ b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
@@ -295,7 +295,7 @@ mlir::detail::getDefaultStackAlignment(DataLayoutEntryInterface entry) {
 
 // Returns the max vector op width if specified in the given entry. If the entry
 // is empty (meaning the spec is missing), returns std::nullopt.
-std::optional<uint32_t>
+std::optional<int64_t>
 mlir::detail::getMaxVectorOpWidth(DataLayoutEntryInterface entry) {
   if (entry == DataLayoutEntryInterface())
     return std::nullopt;
@@ -306,7 +306,7 @@ mlir::detail::getMaxVectorOpWidth(DataLayoutEntryInterface entry) {
 
 // Returns the L1 cache size if specified in the given entry. If the entry
 // is empty (meaning the spec is missing), returns std::nullopt.
-std::optional<uint32_t>
+std::optional<int64_t>
 mlir::detail::getL1CacheSizeInBytes(DataLayoutEntryInterface entry) {
   if (entry == DataLayoutEntryInterface())
     return std::nullopt;
@@ -468,10 +468,10 @@ void checkMissingLayout(DataLayoutSpecInterface originalLayout, OpTy op) {
 mlir::DataLayout::DataLayout() : DataLayout(ModuleOp()) {}
 
 mlir::DataLayout::DataLayout(DataLayoutOpInterface op)
-    : originalLayout(getCombinedDataLayout(op)), scope(op),
+    : originalLayout(getCombinedDataLayout(op)),
+      originalTargetSystemDesc(getTargetSystemSpec(op)), scope(op),
       allocaMemorySpace(std::nullopt), programMemorySpace(std::nullopt),
-      globalMemorySpace(std::nullopt), stackAlignment(std::nullopt),
-      originalTargetSystemDesc(getTargetSystemSpec(op)) {
+      globalMemorySpace(std::nullopt), stackAlignment(std::nullopt) {
 #if LLVM_ENABLE_ABI_BREAKING_CHECKS
   checkMissingLayout(originalLayout, op);
   collectParentLayouts(op, layoutStack);
@@ -479,10 +479,10 @@ mlir::DataLayout::DataLayout(DataLayoutOpInterface op)
 }
 
 mlir::DataLayout::DataLayout(ModuleOp op)
-    : originalLayout(getCombinedDataLayout(op)), scope(op),
+    : originalLayout(getCombinedDataLayout(op)),
+      originalTargetSystemDesc(getTargetSystemSpec(op)), scope(op),
       allocaMemorySpace(std::nullopt), programMemorySpace(std::nullopt),
-      globalMemorySpace(std::nullopt), stackAlignment(std::nullopt),
-      originalTargetSystemDesc(getTargetSystemSpec(op)) {
+      globalMemorySpace(std::nullopt), stackAlignment(std::nullopt) {
 #if LLVM_ENABLE_ABI_BREAKING_CHECKS
   checkMissingLayout(originalLayout, op);
   collectParentLayouts(op, layoutStack);
@@ -677,7 +677,7 @@ uint64_t mlir::DataLayout::getStackAlignment() const {
   return *stackAlignment;
 }
 
-std::optional<uint32_t> mlir::DataLayout::getMaxVectorOpWidth(
+std::optional<int64_t> mlir::DataLayout::getMaxVectorOpWidth(
     TargetSystemSpecInterface::DeviceID deviceID) const {
   checkValid();
   DataLayoutEntryInterface entry;
@@ -697,7 +697,7 @@ std::optional<uint32_t> mlir::DataLayout::getMaxVectorOpWidth(
     return detail::getMaxVectorOpWidth(entry);
 }
 
-std::optional<uint32_t> mlir::DataLayout::getL1CacheSizeInBytes(
+std::optional<int64_t> mlir::DataLayout::getL1CacheSizeInBytes(
     TargetSystemSpecInterface::DeviceID deviceID) const {
   checkValid();
   DataLayoutEntryInterface entry;
diff --git a/mlir/test/Dialect/DLTI/invalid.mlir b/mlir/test/Dialect/DLTI/invalid.mlir
index 0f1558100da71..b2cf8753eaaf2 100644
--- a/mlir/test/Dialect/DLTI/invalid.mlir
+++ b/mlir/test/Dialect/DLTI/invalid.mlir
@@ -113,7 +113,7 @@ module attributes {
   // expected-error at +2 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>`}}
   dlti.target_system_spec = #dlti.target_system_spec<
     : #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>> 
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : i32>>
   >} {}
 
 // -----
@@ -137,9 +137,9 @@ module attributes {
   // expected-error at below {{repeated Device ID in dlti.target_system_spec: "CPU"}}
   dlti.target_system_spec = #dlti.target_system_spec<
     "CPU": #dlti.target_device_spec<
-            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
+            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096>>,
     "CPU": #dlti.target_device_spec<
-            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192 : ui32>>
+            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192>>
   >} {}
 
 // -----
@@ -147,7 +147,7 @@ module attributes {
 module attributes {
   // L1_cache_size_in_bytes is of incorrect type
   //
-  // expected-error at +4 {{target_device_spec requires value of key: dlti.L1_cache_size_in_bytes to be of ui32 type}}
+  // expected-error at +4 {{target_device_spec requires value of key: dlti.L1_cache_size_in_bytes to be of integer type}}
   // expected-error at +5 {{Error in parsing target device spec}}
   // expected-error at +4 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>`}}
   dlti.target_system_spec = #dlti.target_system_spec<
@@ -160,7 +160,7 @@ module attributes {
 module attributes {
   // max_vector_op_width is of incorrect type
   //
-  // expected-error at +4 {{target_device_spec requires value of key: dlti.max_vector_op_width to be of ui32 type}}
+  // expected-error at +4 {{target_device_spec requires value of key: dlti.max_vector_op_width to be of integer type}}
   // expected-error at +5 {{Error in parsing target device spec}}
   // expected-error at +4 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>`}}
   dlti.target_system_spec = #dlti.target_system_spec<
@@ -178,8 +178,8 @@ module attributes {
   // expected-error at +5 {{failed to parse DLTI_TargetSystemSpecAttr parameter 'entries' which is to be a `::llvm::ArrayRef<DeviceIDTargetDeviceSpecPair>`}}
   dlti.target_system_spec = #dlti.target_system_spec<
     "CPU": #dlti.target_device_spec<
-            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>,
-            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192 : ui32>>
+            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096>,
+            #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192>>
   >} {}
 
 // -----
diff --git a/mlir/test/Dialect/DLTI/valid.mlir b/mlir/test/Dialect/DLTI/valid.mlir
index 6643c32ae5324..175368f306822 100644
--- a/mlir/test/Dialect/DLTI/valid.mlir
+++ b/mlir/test/Dialect/DLTI/valid.mlir
@@ -5,17 +5,17 @@
 // CHECK:      module attributes {
 // CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
 // CHECK-SAME:    "CPU" : #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : i32>>,
 // CHECK-SAME:    "GPU" : #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
+// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : i32>>
 // CHECK-SAME:  >} {
 // CHECK:        }
 module attributes {
   dlti.target_system_spec = #dlti.target_system_spec<
     "CPU": #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: i32>>,
     "GPU": #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.max_vector_op_width", 128: ui32>>
+      #dlti.dl_entry<"dlti.max_vector_op_width", 128: i32>>
   >} {}
 
 // -----
@@ -23,17 +23,17 @@ module attributes {
 // CHECK:      module attributes {
 // CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
 // CHECK-SAME:    "CPU" : #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : ui32>>,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : i32>>,
 // CHECK-SAME:    "GPU" : #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192 : ui32>>
+// CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192 : i32>>
 // CHECK-SAME:  >} {
 // CHECK:        }
 module attributes {
   dlti.target_system_spec = #dlti.target_system_spec<
     "CPU": #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: ui32>>,
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: i32>>,
     "GPU": #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192: ui32>>
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192: i32>>
   >} {}
 
 // -----
@@ -41,15 +41,69 @@ module attributes {
 // CHECK:      module attributes {
 // CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
 // CHECK-SAME:    "CPU" : #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 64 : ui32>>,
+// CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096 : i64>>,
 // CHECK-SAME:    "GPU" : #dlti.target_device_spec<
-// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : ui32>>
+// CHECK-SAME:      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192 : i64>>
 // CHECK-SAME:  >} {
 // CHECK:        }
 module attributes {
   dlti.target_system_spec = #dlti.target_system_spec<
     "CPU": #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.max_vector_op_width", 64: ui32>>,
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 4096: i64>>,
     "GPU": #dlti.target_device_spec<
-      #dlti.dl_entry<"dlti.max_vector_op_width", 128: ui32>>
+      #dlti.dl_entry<"dlti.L1_cache_size_in_bytes", 8192: i64>>
+  >} {}
+
+// -----
+
+// CHECK:      module attributes {
+// CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
+// CHECK-SAME:    "CPU" : #dlti.target_device_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 64 : i32>>,
+// CHECK-SAME:    "GPU" : #dlti.target_device_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : i32>>
+// CHECK-SAME:  >} {
+// CHECK:        }
+module attributes {
+  dlti.target_system_spec = #dlti.target_system_spec<
+    "CPU": #dlti.target_device_spec<
+      #dlti.dl_entry<"dlti.max_vector_op_width", 64: i32>>,
+    "GPU": #dlti.target_device_spec<
+      #dlti.dl_entry<"dlti.max_vector_op_width", 128: i32>>
+  >} {}
+
+// -----
+
+// CHECK:      module attributes {
+// CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
+// CHECK-SAME:    "CPU" : #dlti.target_device_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 64 : i64>>,
+// CHECK-SAME:    "GPU" : #dlti.target_device_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : i64>>
+// CHECK-SAME:  >} {
+// CHECK:        }
+module attributes {
+  dlti.target_system_spec = #dlti.target_system_spec<
+    "CPU": #dlti.target_device_spec<
+      #dlti.dl_entry<"dlti.max_vector_op_width", 64: i64>>,
+    "GPU": #dlti.target_device_spec<
+      #dlti.dl_entry<"dlti.max_vector_op_width", 128: i64>>
+  >} {}
+
+// -----
+
+// CHECK:      module attributes {
+// CHECK-SAME:  dlti.target_system_spec = #dlti.target_system_spec<
+// CHECK-SAME:    "CPU" : #dlti.target_device_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 64 : i64>>,
+// CHECK-SAME:    "GPU" : #dlti.target_device_spec<
+// CHECK-SAME:      #dlti.dl_entry<"dlti.max_vector_op_width", 128 : i64>>
+// CHECK-SAME:  >} {
+// CHECK:        }
+module attributes {
+  dlti.target_system_spec = #dlti.target_system_spec<
+    "CPU": #dlti.target_device_spec<
+      #dlti.dl_entry<"dlti.max_vector_op_width", 64>>,
+    "GPU": #dlti.target_device_spec<
+      #dlti.dl_entry<"dlti.max_vector_op_width", 128>>
   >} {}
diff --git a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
index 4a4900147f7b7..321084cfbacf7 100644
--- a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
+++ b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
@@ -608,10 +608,10 @@ TEST(DataLayout, SpecWithTargetSystemDescEntries) {
   DataLayout layout(*module);
   EXPECT_EQ(layout.getL1CacheSizeInBytes(
                 Builder(&ctx).getStringAttr("CPU") /* device ID*/),
-            std::optional<uint32_t>(4096));
+            std::optional<int64_t>(4096));
   EXPECT_EQ(layout.getMaxVectorOpWidth(
                 Builder(&ctx).getStringAttr("CPU") /* device ID*/),
-            std::optional<uint32_t>(128));
+            std::optional<int64_t>(128));
 }
 
 TEST(DataLayout, Caching) {



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