[Mlir-commits] [mlir] [llvm] [mlir] use TypeSize and uint64_t in DataLayout (PR #72874)

Oleksandr Alex Zinenko llvmlistbot at llvm.org
Tue Nov 21 05:08:31 PST 2023


https://github.com/ftynse updated https://github.com/llvm/llvm-project/pull/72874

>From c3836af3e8c361331fb0ff47b7867f83436dd47c Mon Sep 17 00:00:00 2001
From: Alex Zinenko <zinenko at google.com>
Date: Mon, 20 Nov 2023 12:36:00 +0000
Subject: [PATCH 1/3] [mlir] use TypeSize and uint64_t in DataLayout

Data layout queries may be issued for types whose size exceeds the range
of 32-bit integer as well as for types that don't have a size known at
compile time, such as scalable vectors. Use best practices from LLVM IR
and adopt `llvm::TypeSize` for size-related queries and `uint64_t` for
alignment-related queries.

See #72678.
---
 llvm/include/llvm/Support/TypeSize.h          |   8 ++
 mlir/docs/DataLayout.md                       |   8 +-
 mlir/include/mlir/Dialect/LLVMIR/LLVMTypes.h  |  10 +-
 .../mlir/Interfaces/DataLayoutInterfaces.h    |  43 ++++----
 .../mlir/Interfaces/DataLayoutInterfaces.td   |  26 ++---
 mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp      |  99 +++++++++--------
 .../Dialect/Linalg/Transforms/Promotion.cpp   |   7 +-
 mlir/lib/Interfaces/DataLayoutInterfaces.cpp  | 103 ++++++++++--------
 mlir/lib/Target/LLVMIR/DataLayoutImporter.cpp |  47 ++++----
 mlir/lib/Target/LLVMIR/DataLayoutImporter.h   |   4 +-
 mlir/lib/Target/LLVMIR/ModuleTranslation.cpp  |  24 ++--
 .../convert-dynamic-memref-ops.mlir           |   4 +-
 .../Dialect/LLVMIR/dynamic-gep-index.mlir     |  11 +-
 mlir/test/Dialect/LLVMIR/layout.mlir          |  44 +++++---
 .../DataLayoutInterfaces/query.mlir           |  16 +--
 .../DataLayoutInterfaces/types.mlir           |   8 +-
 mlir/test/Target/LLVMIR/Import/data-layout.ll |  40 +++----
 mlir/test/Target/LLVMIR/data-layout.mlir      |  14 +--
 mlir/test/lib/Dialect/Test/TestTypeDefs.td    |   2 +-
 mlir/test/lib/Dialect/Test/TestTypes.cpp      |  11 +-
 .../Interfaces/DataLayoutInterfacesTest.cpp   |  32 +++---
 21 files changed, 314 insertions(+), 247 deletions(-)

diff --git a/llvm/include/llvm/Support/TypeSize.h b/llvm/include/llvm/Support/TypeSize.h
index 8e638f8278e828b..6afda46dd9eb69a 100644
--- a/llvm/include/llvm/Support/TypeSize.h
+++ b/llvm/include/llvm/Support/TypeSize.h
@@ -244,6 +244,14 @@ template <typename LeafTy, typename ValueTy> class FixedOrScalableQuantity {
         isScalable());
   }
 
+  /// Returns a value X where the known coefficient will be rounded up to the
+  /// closest power-of-two, except for the zero coefficient that remains zero.
+  constexpr LeafTy coefficientPowerOf2Ceil() const {
+    return LeafTy::get(
+        static_cast<ScalarTy>(llvm::PowerOf2Ceil(getKnownMinValue())),
+        isScalable());
+  }
+
   /// Returns true if there exists a value X where RHS.multiplyCoefficientBy(X)
   /// will result in a value whose quantity matches our own.
   constexpr bool
diff --git a/mlir/docs/DataLayout.md b/mlir/docs/DataLayout.md
index e246e66c7fe227b..b9dde30519d6eda 100644
--- a/mlir/docs/DataLayout.md
+++ b/mlir/docs/DataLayout.md
@@ -73,10 +73,10 @@ class DataLayout {
 public:
   explicit DataLayout(DataLayoutOpInterface scope);
 
-  unsigned getTypeSize(Type type) const;
-  unsigned getTypeSizeInBits(Type type) const;
-  unsigned getTypeABIAlignment(Type type) const;
-  unsigned getTypePreferredAlignment(Type type) const;
+  llvm::TypeSize getTypeSize(Type type) const;
+  llvm::TypeSize getTypeSizeInBits(Type type) const;
+  uint64_t getTypeABIAlignment(Type type) const;
+  uint64_t getTypePreferredAlignment(Type type) const;
 };
 ```
 
diff --git a/mlir/include/mlir/Dialect/LLVMIR/LLVMTypes.h b/mlir/include/mlir/Dialect/LLVMIR/LLVMTypes.h
index ba2f14f173aa0c3..06a41c7c1a72459 100644
--- a/mlir/include/mlir/Dialect/LLVMIR/LLVMTypes.h
+++ b/mlir/include/mlir/Dialect/LLVMIR/LLVMTypes.h
@@ -186,13 +186,13 @@ class LLVMStructType
 
   /// Hooks for DataLayoutTypeInterface. Should not be called directly. Obtain a
   /// DataLayout instance and query it instead.
-  unsigned getTypeSizeInBits(const DataLayout &dataLayout,
-                             DataLayoutEntryListRef params) const;
+  llvm::TypeSize getTypeSizeInBits(const DataLayout &dataLayout,
+                                   DataLayoutEntryListRef params) const;
 
-  unsigned getABIAlignment(const DataLayout &dataLayout,
+  uint64_t getABIAlignment(const DataLayout &dataLayout,
                            DataLayoutEntryListRef params) const;
 
-  unsigned getPreferredAlignment(const DataLayout &dataLayout,
+  uint64_t getPreferredAlignment(const DataLayout &dataLayout,
                                  DataLayoutEntryListRef params) const;
 
   bool areCompatible(DataLayoutEntryListRef oldLayout,
@@ -288,7 +288,7 @@ enum class PtrDLEntryPos { Size = 0, Abi = 1, Preferred = 2, Index = 3 };
 /// Returns `std::nullopt` if `pos` is not present in the entry.
 /// Currently only `PtrDLEntryPos::Index` is optional, and all other positions
 /// may be assumed to be present.
-std::optional<unsigned> extractPointerSpecValue(Attribute attr,
+std::optional<uint64_t> extractPointerSpecValue(Attribute attr,
                                                 PtrDLEntryPos pos);
 
 } // namespace LLVM
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
index e6e31d171c6a9fd..f4b9b95fb89f89f 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
@@ -18,6 +18,7 @@
 #include "mlir/IR/DialectInterface.h"
 #include "mlir/IR/OpDefinition.h"
 #include "llvm/ADT/DenseMap.h"
+#include "llvm/Support/TypeSize.h"
 
 namespace mlir {
 class DataLayout;
@@ -34,25 +35,25 @@ class ModuleOp;
 namespace detail {
 /// Default handler for the type size request. Computes results for built-in
 /// types and dispatches to the DataLayoutTypeInterface for other types.
-unsigned getDefaultTypeSize(Type type, const DataLayout &dataLayout,
-                            DataLayoutEntryListRef params);
+llvm::TypeSize getDefaultTypeSize(Type type, const DataLayout &dataLayout,
+                                  DataLayoutEntryListRef params);
 
 /// Default handler for the type size in bits request. Computes results for
 /// built-in types and dispatches to the DataLayoutTypeInterface for other
 /// types.
-unsigned getDefaultTypeSizeInBits(Type type, const DataLayout &dataLayout,
-                                  DataLayoutEntryListRef params);
+llvm::TypeSize getDefaultTypeSizeInBits(Type type, const DataLayout &dataLayout,
+                                        DataLayoutEntryListRef params);
 
-/// Default handler for the required alignemnt request. Computes results for
+/// Default handler for the required alignment request. Computes results for
 /// built-in types and dispatches to the DataLayoutTypeInterface for other
 /// types.
-unsigned getDefaultABIAlignment(Type type, const DataLayout &dataLayout,
+uint64_t getDefaultABIAlignment(Type type, const DataLayout &dataLayout,
                                 ArrayRef<DataLayoutEntryInterface> params);
 
-/// Default handler for the preferred alignemnt request. Computes results for
+/// Default handler for the preferred alignment request. Computes results for
 /// built-in types and dispatches to the DataLayoutTypeInterface for other
 /// types.
-unsigned
+uint64_t
 getDefaultPreferredAlignment(Type type, const DataLayout &dataLayout,
                              ArrayRef<DataLayoutEntryInterface> params);
 
@@ -62,7 +63,7 @@ Attribute getDefaultAllocaMemorySpace(DataLayoutEntryInterface entry);
 
 /// Default handler for the stack alignment request. Dispatches to the
 /// DataLayoutInterface if specified, otherwise returns the default.
-unsigned getDefaultStackAlignment(DataLayoutEntryInterface entry);
+uint64_t getDefaultStackAlignment(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
@@ -85,6 +86,10 @@ LogicalResult verifyDataLayoutOp(Operation *op);
 /// entry verifiers, and then to the verifiers implemented by the relevant type
 /// and dialect interfaces for type and identifier keys respectively.
 LogicalResult verifyDataLayoutSpec(DataLayoutSpecInterface 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);
 } // namespace detail
 } // namespace mlir
 
@@ -156,16 +161,16 @@ class DataLayout {
   static DataLayout closest(Operation *op);
 
   /// Returns the size of the given type in the current scope.
-  unsigned getTypeSize(Type t) const;
+  llvm::TypeSize getTypeSize(Type t) const;
 
   /// Returns the size in bits of the given type in the current scope.
-  unsigned getTypeSizeInBits(Type t) const;
+  llvm::TypeSize getTypeSizeInBits(Type t) const;
 
   /// Returns the required alignment of the given type in the current scope.
-  unsigned getTypeABIAlignment(Type t) const;
+  uint64_t getTypeABIAlignment(Type t) const;
 
   /// Returns the preferred of the given type in the current scope.
-  unsigned getTypePreferredAlignment(Type t) const;
+  uint64_t getTypePreferredAlignment(Type t) const;
 
   /// Returns the memory space used for AllocaOps.
   Attribute getAllocaMemorySpace() const;
@@ -174,7 +179,7 @@ class DataLayout {
   /// stack variables should be limited to the natural stack alignment to
   /// prevent dynamic stack alignment. Returns zero if the stack alignment is
   /// unspecified.
-  unsigned getStackAlignment() const;
+  uint64_t getStackAlignment() const;
 
 private:
   /// Combined layout spec at the given scope.
@@ -193,16 +198,16 @@ class DataLayout {
   Operation *scope;
 
   /// Caches for individual requests.
-  mutable DenseMap<Type, unsigned> sizes;
-  mutable DenseMap<Type, unsigned> bitsizes;
-  mutable DenseMap<Type, unsigned> abiAlignments;
-  mutable DenseMap<Type, unsigned> preferredAlignments;
+  mutable DenseMap<Type, llvm::TypeSize> sizes;
+  mutable DenseMap<Type, llvm::TypeSize> bitsizes;
+  mutable DenseMap<Type, uint64_t> abiAlignments;
+  mutable DenseMap<Type, uint64_t> preferredAlignments;
 
   /// Cache for alloca memory space.
   mutable std::optional<Attribute> allocaMemorySpace;
 
   /// Cache for stack alignment.
-  mutable std::optional<unsigned> stackAlignment;
+  mutable std::optional<uint64_t> stackAlignment;
 };
 
 } // namespace mlir
diff --git a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
index bac8c23ceec01ad..2f60a16baf50bca 100644
--- a/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
+++ b/mlir/include/mlir/Interfaces/DataLayoutInterfaces.td
@@ -213,22 +213,22 @@ def DataLayoutOpInterface : OpInterface<"DataLayoutOpInterface"> {
       /*description=*/"Returns the size of the given type computed using the "
                       "relevant entries. The data layout object can be used "
                       "for recursive queries.",
-      /*retTy=*/"unsigned",
+      /*retTy=*/"::llvm::TypeSize",
       /*methodName=*/"getTypeSize",
       /*args=*/(ins "::mlir::Type":$type,
                     "const ::mlir::DataLayout &":$dataLayout,
                     "::mlir::DataLayoutEntryListRef":$params),
       /*methodBody=*/"",
       /*defaultImplementation=*/[{
-        unsigned bits = ConcreteOp::getTypeSizeInBits(type, dataLayout, params);
-        return ::llvm::divideCeil(bits, 8);
+        ::llvm::TypeSize bits = ConcreteOp::getTypeSizeInBits(type, dataLayout, params);
+        return ::mlir::detail::divideCeil(bits, 8u);
       }]
     >,
     StaticInterfaceMethod<
       /*description=*/"Returns the size of the given type in bits computed "
                       "using the relevant entries. The data layout object can "
                       "be used for recursive queries.",
-      /*retTy=*/"unsigned",
+      /*retTy=*/"::llvm::TypeSize",
       /*methodName=*/"getTypeSizeInBits",
       /*args=*/(ins "::mlir::Type":$type,
                     "const ::mlir::DataLayout &":$dataLayout,
@@ -243,7 +243,7 @@ def DataLayoutOpInterface : OpInterface<"DataLayoutOpInterface"> {
       /*description=*/"Returns the alignment required by the ABI for the given "
                       "type computed using the relevant entries. The data "
                       "layout object can be used for recursive queries.",
-      /*retTy=*/"unsigned",
+      /*retTy=*/"uint64_t",
       /*methodName=*/"getTypeABIAlignment",
       /*args=*/(ins "::mlir::Type":$type,
                     "const ::mlir::DataLayout &":$dataLayout,
@@ -257,7 +257,7 @@ def DataLayoutOpInterface : OpInterface<"DataLayoutOpInterface"> {
       /*description=*/"Returns the alignment preferred by the given type "
                       "computed using the relevant entries. The data layout"
                       "object can be used for recursive queries.",
-      /*retTy=*/"unsigned",
+      /*retTy=*/"uint64_t",
       /*methodName=*/"getTypePreferredAlignment",
       /*args=*/(ins "::mlir::Type":$type,
                     "const ::mlir::DataLayout &":$dataLayout,
@@ -284,7 +284,7 @@ def DataLayoutOpInterface : OpInterface<"DataLayoutOpInterface"> {
       /*description=*/"Returns the natural stack alignment in bits computed "
                       "using the relevant entries. The data layout object "
                       "can be used for recursive queries.",
-      /*retTy=*/"unsigned",
+      /*retTy=*/"uint64_t",
       /*methodName=*/"getStackAlignment",
       /*args=*/(ins "::mlir::DataLayoutEntryInterface":$entry),
       /*methodBody=*/"",
@@ -331,19 +331,19 @@ def DataLayoutTypeInterface : TypeInterface<"DataLayoutTypeInterface"> {
   let methods = [
     InterfaceMethod<
       /*description=*/"Returns the size of this type in bytes.",
-      /*retTy=*/"unsigned",
+      /*retTy=*/"::llvm::TypeSize",
       /*methodName=*/"getTypeSize",
       /*args=*/(ins "const ::mlir::DataLayout &":$dataLayout,
                     "::mlir::DataLayoutEntryListRef":$params),
       /*methodBody=*/"",
       /*defaultImplementation=*/[{
-        unsigned bits = $_type.getTypeSizeInBits(dataLayout, params);
-        return ::llvm::divideCeil(bits, 8);
+        ::llvm::TypeSize bits = $_type.getTypeSizeInBits(dataLayout, params);
+        return ::mlir::detail::divideCeil(bits, 8u);
       }]
     >,
     InterfaceMethod<
       /*description=*/"Returns the size of this type in bits.",
-      /*retTy=*/"unsigned",
+      /*retTy=*/"::llvm::TypeSize",
       /*methodName=*/"getTypeSizeInBits",
       /*args=*/(ins "const ::mlir::DataLayout &":$dataLayout,
                     "::mlir::DataLayoutEntryListRef":$params)
@@ -351,7 +351,7 @@ def DataLayoutTypeInterface : TypeInterface<"DataLayoutTypeInterface"> {
     InterfaceMethod<
       /*description=*/"Returns the ABI-required alignment for this type, "
                       "in bytes",
-      /*retTy=*/"unsigned",
+      /*retTy=*/"uint64_t",
       /*methodName=*/"getABIAlignment",
       /*args=*/(ins "const ::mlir::DataLayout &":$dataLayout,
                     "::mlir::DataLayoutEntryListRef":$params)
@@ -359,7 +359,7 @@ def DataLayoutTypeInterface : TypeInterface<"DataLayoutTypeInterface"> {
     InterfaceMethod<
       /*description=*/"Returns the preferred alignment for this type, "
                       "in bytes.",
-      /*retTy=*/"unsigned",
+      /*retTy=*/"uint64_t",
       /*methodName=*/"getPreferredAlignment",
       /*args=*/(ins "const ::mlir::DataLayout &":$dataLayout,
                     "::mlir::DataLayoutEntryListRef":$params)
diff --git a/mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp b/mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp
index 8841aa8362569a0..f4aa939791588da 100644
--- a/mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp
+++ b/mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp
@@ -27,7 +27,7 @@
 using namespace mlir;
 using namespace mlir::LLVM;
 
-constexpr const static unsigned kBitsInByte = 8;
+constexpr const static uint64_t kBitsInByte = 8;
 
 //===----------------------------------------------------------------------===//
 // custom<FunctionTypes>
@@ -178,24 +178,25 @@ LLVMArrayType::verify(function_ref<InFlightDiagnostic()> emitError,
 //===----------------------------------------------------------------------===//
 // DataLayoutTypeInterface
 
-unsigned LLVMArrayType::getTypeSizeInBits(const DataLayout &dataLayout,
-                                          DataLayoutEntryListRef params) const {
-  return kBitsInByte * getTypeSize(dataLayout, params);
+llvm::TypeSize
+LLVMArrayType::getTypeSizeInBits(const DataLayout &dataLayout,
+                                 DataLayoutEntryListRef params) const {
+  return llvm::TypeSize::Fixed(kBitsInByte * getTypeSize(dataLayout, params));
 }
 
-unsigned LLVMArrayType::getTypeSize(const DataLayout &dataLayout,
-                                    DataLayoutEntryListRef params) const {
+llvm::TypeSize LLVMArrayType::getTypeSize(const DataLayout &dataLayout,
+                                          DataLayoutEntryListRef params) const {
   return llvm::alignTo(dataLayout.getTypeSize(getElementType()),
                        dataLayout.getTypeABIAlignment(getElementType())) *
          getNumElements();
 }
 
-unsigned LLVMArrayType::getABIAlignment(const DataLayout &dataLayout,
+uint64_t LLVMArrayType::getABIAlignment(const DataLayout &dataLayout,
                                         DataLayoutEntryListRef params) const {
   return dataLayout.getTypeABIAlignment(getElementType());
 }
 
-unsigned
+uint64_t
 LLVMArrayType::getPreferredAlignment(const DataLayout &dataLayout,
                                      DataLayoutEntryListRef params) const {
   return dataLayout.getTypePreferredAlignment(getElementType());
@@ -254,23 +255,23 @@ LLVMFunctionType::verify(function_ref<InFlightDiagnostic()> emitError,
 //===----------------------------------------------------------------------===//
 // DataLayoutTypeInterface
 
-constexpr const static unsigned kDefaultPointerSizeBits = 64;
-constexpr const static unsigned kDefaultPointerAlignment = 8;
+constexpr const static uint64_t kDefaultPointerSizeBits = 64;
+constexpr const static uint64_t kDefaultPointerAlignment = 8;
 
-std::optional<unsigned> mlir::LLVM::extractPointerSpecValue(Attribute attr,
+std::optional<uint64_t> mlir::LLVM::extractPointerSpecValue(Attribute attr,
                                                             PtrDLEntryPos pos) {
-  auto spec = llvm::cast<DenseIntElementsAttr>(attr);
-  auto idx = static_cast<unsigned>(pos);
+  auto spec = cast<DenseIntElementsAttr>(attr);
+  auto idx = static_cast<int64_t>(pos);
   if (idx >= spec.size())
     return std::nullopt;
-  return spec.getValues<unsigned>()[idx];
+  return spec.getValues<uint64_t>()[idx];
 }
 
 /// Returns the part of the data layout entry that corresponds to `pos` for the
 /// given `type` by interpreting the list of entries `params`. For the pointer
 /// type in the default address space, returns the default value if the entries
 /// do not provide a custom one, for other address spaces returns std::nullopt.
-static std::optional<unsigned>
+static std::optional<uint64_t>
 getPointerDataLayoutEntry(DataLayoutEntryListRef params, LLVMPointerType type,
                           PtrDLEntryPos pos) {
   // First, look for the entry for the pointer in the current address space.
@@ -278,8 +279,8 @@ getPointerDataLayoutEntry(DataLayoutEntryListRef params, LLVMPointerType type,
   for (DataLayoutEntryInterface entry : params) {
     if (!entry.isTypeEntry())
       continue;
-    if (llvm::cast<LLVMPointerType>(entry.getKey().get<Type>())
-            .getAddressSpace() == type.getAddressSpace()) {
+    if (cast<LLVMPointerType>(entry.getKey().get<Type>()).getAddressSpace() ==
+        type.getAddressSpace()) {
       currentEntry = entry.getValue();
       break;
     }
@@ -299,31 +300,31 @@ getPointerDataLayoutEntry(DataLayoutEntryListRef params, LLVMPointerType type,
   return std::nullopt;
 }
 
-unsigned
+llvm::TypeSize
 LLVMPointerType::getTypeSizeInBits(const DataLayout &dataLayout,
                                    DataLayoutEntryListRef params) const {
-  if (std::optional<unsigned> size =
+  if (std::optional<uint64_t> size =
           getPointerDataLayoutEntry(params, *this, PtrDLEntryPos::Size))
-    return *size;
+    return llvm::TypeSize::Fixed(*size);
 
   // For other memory spaces, use the size of the pointer to the default memory
   // space.
   return dataLayout.getTypeSizeInBits(get(getContext()));
 }
 
-unsigned LLVMPointerType::getABIAlignment(const DataLayout &dataLayout,
+uint64_t LLVMPointerType::getABIAlignment(const DataLayout &dataLayout,
                                           DataLayoutEntryListRef params) const {
-  if (std::optional<unsigned> alignment =
+  if (std::optional<uint64_t> alignment =
           getPointerDataLayoutEntry(params, *this, PtrDLEntryPos::Abi))
     return *alignment;
 
   return dataLayout.getTypeABIAlignment(get(getContext()));
 }
 
-unsigned
+uint64_t
 LLVMPointerType::getPreferredAlignment(const DataLayout &dataLayout,
                                        DataLayoutEntryListRef params) const {
-  if (std::optional<unsigned> alignment =
+  if (std::optional<uint64_t> alignment =
           getPointerDataLayoutEntry(params, *this, PtrDLEntryPos::Preferred))
     return *alignment;
 
@@ -335,8 +336,8 @@ bool LLVMPointerType::areCompatible(DataLayoutEntryListRef oldLayout,
   for (DataLayoutEntryInterface newEntry : newLayout) {
     if (!newEntry.isTypeEntry())
       continue;
-    unsigned size = kDefaultPointerSizeBits;
-    unsigned abi = kDefaultPointerAlignment;
+    uint64_t size = kDefaultPointerSizeBits;
+    uint64_t abi = kDefaultPointerAlignment;
     auto newType = llvm::cast<LLVMPointerType>(newEntry.getKey().get<Type>());
     const auto *it =
         llvm::find_if(oldLayout, [&](DataLayoutEntryInterface entry) {
@@ -360,8 +361,8 @@ bool LLVMPointerType::areCompatible(DataLayoutEntryListRef oldLayout,
     }
 
     Attribute newSpec = llvm::cast<DenseIntElementsAttr>(newEntry.getValue());
-    unsigned newSize = *extractPointerSpecValue(newSpec, PtrDLEntryPos::Size);
-    unsigned newAbi = *extractPointerSpecValue(newSpec, PtrDLEntryPos::Abi);
+    uint64_t newSize = *extractPointerSpecValue(newSpec, PtrDLEntryPos::Size);
+    uint64_t newAbi = *extractPointerSpecValue(newSpec, PtrDLEntryPos::Abi);
     if (size != newSize || abi < newAbi || abi % newAbi != 0)
       return false;
   }
@@ -373,13 +374,17 @@ LogicalResult LLVMPointerType::verifyEntries(DataLayoutEntryListRef entries,
   for (DataLayoutEntryInterface entry : entries) {
     if (!entry.isTypeEntry())
       continue;
+    auto key = entry.getKey().get<Type>();
     auto values = llvm::dyn_cast<DenseIntElementsAttr>(entry.getValue());
     if (!values || (values.size() != 3 && values.size() != 4)) {
       return emitError(loc)
-             << "expected layout attribute for " << entry.getKey().get<Type>()
+             << "expected layout attribute for " << key
              << " to be a dense integer elements attribute with 3 or 4 "
                 "elements";
     }
+    if (!values.getElementType().isInteger(64))
+      return emitError(loc) << "expected i64 parameters for " << key;
+
     if (extractPointerSpecValue(values, PtrDLEntryPos::Abi) >
         extractPointerSpecValue(values, PtrDLEntryPos::Preferred)) {
       return emitError(loc) << "preferred alignment is expected to be at least "
@@ -484,16 +489,16 @@ LLVMStructType::verify(function_ref<InFlightDiagnostic()> emitError,
   return success();
 }
 
-unsigned
+llvm::TypeSize
 LLVMStructType::getTypeSizeInBits(const DataLayout &dataLayout,
                                   DataLayoutEntryListRef params) const {
-  unsigned structSize = 0;
-  unsigned structAlignment = 1;
+  auto structSize = llvm::TypeSize::Fixed(0);
+  uint64_t structAlignment = 1;
   for (Type element : getBody()) {
-    unsigned elementAlignment =
+    uint64_t elementAlignment =
         isPacked() ? 1 : dataLayout.getTypeABIAlignment(element);
     // Add padding to the struct size to align it to the abi alignment of the
-    // element type before than adding the size of the element
+    // element type before than adding the size of the element.
     structSize = llvm::alignTo(structSize, elementAlignment);
     structSize += dataLayout.getTypeSize(element);
 
@@ -511,7 +516,7 @@ namespace {
 enum class StructDLEntryPos { Abi = 0, Preferred = 1 };
 } // namespace
 
-static std::optional<unsigned>
+static std::optional<uint64_t>
 getStructDataLayoutEntry(DataLayoutEntryListRef params, LLVMStructType type,
                          StructDLEntryPos pos) {
   const auto *currentEntry =
@@ -523,14 +528,14 @@ getStructDataLayoutEntry(DataLayoutEntryListRef params, LLVMStructType type,
 
   auto attr = llvm::cast<DenseIntElementsAttr>(currentEntry->getValue());
   if (pos == StructDLEntryPos::Preferred &&
-      attr.size() <= static_cast<unsigned>(StructDLEntryPos::Preferred))
+      attr.size() <= static_cast<int64_t>(StructDLEntryPos::Preferred))
     // If no preferred was specified, fall back to abi alignment
     pos = StructDLEntryPos::Abi;
 
-  return attr.getValues<unsigned>()[static_cast<unsigned>(pos)];
+  return attr.getValues<uint64_t>()[static_cast<size_t>(pos)];
 }
 
-static unsigned calculateStructAlignment(const DataLayout &dataLayout,
+static uint64_t calculateStructAlignment(const DataLayout &dataLayout,
                                          DataLayoutEntryListRef params,
                                          LLVMStructType type,
                                          StructDLEntryPos pos) {
@@ -541,36 +546,36 @@ static unsigned calculateStructAlignment(const DataLayout &dataLayout,
 
   // The alignment requirement of a struct is equal to the strictest alignment
   // requirement of its elements.
-  unsigned structAlignment = 1;
+  uint64_t structAlignment = 1;
   for (Type iter : type.getBody()) {
     structAlignment =
         std::max(dataLayout.getTypeABIAlignment(iter), structAlignment);
   }
 
   // Entries are only allowed to be stricter than the required alignment
-  if (std::optional<unsigned> entryResult =
+  if (std::optional<uint64_t> entryResult =
           getStructDataLayoutEntry(params, type, pos))
     return std::max(*entryResult / kBitsInByte, structAlignment);
 
   return structAlignment;
 }
 
-unsigned LLVMStructType::getABIAlignment(const DataLayout &dataLayout,
+uint64_t LLVMStructType::getABIAlignment(const DataLayout &dataLayout,
                                          DataLayoutEntryListRef params) const {
   return calculateStructAlignment(dataLayout, params, *this,
                                   StructDLEntryPos::Abi);
 }
 
-unsigned
+uint64_t
 LLVMStructType::getPreferredAlignment(const DataLayout &dataLayout,
                                       DataLayoutEntryListRef params) const {
   return calculateStructAlignment(dataLayout, params, *this,
                                   StructDLEntryPos::Preferred);
 }
 
-static unsigned extractStructSpecValue(Attribute attr, StructDLEntryPos pos) {
+static uint64_t extractStructSpecValue(Attribute attr, StructDLEntryPos pos) {
   return llvm::cast<DenseIntElementsAttr>(attr)
-      .getValues<unsigned>()[static_cast<unsigned>(pos)];
+      .getValues<uint64_t>()[static_cast<size_t>(pos)];
 }
 
 bool LLVMStructType::areCompatible(DataLayoutEntryListRef oldLayout,
@@ -586,9 +591,9 @@ bool LLVMStructType::areCompatible(DataLayoutEntryListRef oldLayout,
     if (previousEntry == oldLayout.end())
       continue;
 
-    unsigned abi = extractStructSpecValue(previousEntry->getValue(),
+    uint64_t abi = extractStructSpecValue(previousEntry->getValue(),
                                           StructDLEntryPos::Abi);
-    unsigned newAbi =
+    uint64_t newAbi =
         extractStructSpecValue(newEntry.getValue(), StructDLEntryPos::Abi);
     if (abi < newAbi || abi % newAbi != 0)
       return false;
@@ -609,6 +614,8 @@ LogicalResult LLVMStructType::verifyEntries(DataLayoutEntryListRef entries,
              << "expected layout attribute for " << entry.getKey().get<Type>()
              << " to be a dense integer elements attribute of 1 or 2 elements";
     }
+    if (!values.getElementType().isInteger(64))
+      return emitError(loc) << "expected i64 entries for " << key;
 
     if (key.isIdentified() || !key.getBody().empty()) {
       return emitError(loc) << "unexpected layout attribute for struct " << key;
diff --git a/mlir/lib/Dialect/Linalg/Transforms/Promotion.cpp b/mlir/lib/Dialect/Linalg/Transforms/Promotion.cpp
index 5c140a7d692a930..7c8ee1727d56f83 100644
--- a/mlir/lib/Dialect/Linalg/Transforms/Promotion.cpp
+++ b/mlir/lib/Dialect/Linalg/Transforms/Promotion.cpp
@@ -49,7 +49,8 @@ static Value allocBuffer(ImplicitLocOpBuilder &b,
                          const LinalgPromotionOptions &options,
                          Type elementType, Value allocSize, DataLayout &layout,
                          std::optional<unsigned> alignment = std::nullopt) {
-  auto width = layout.getTypeSize(elementType);
+  llvm::TypeSize width = layout.getTypeSize(elementType);
+  assert(!width.isScalable() && "cannot allocate buffer for a scalable vector");
 
   IntegerAttr alignmentAttr;
   if (alignment.has_value())
@@ -61,8 +62,8 @@ static Value allocBuffer(ImplicitLocOpBuilder &b,
 
   // Static buffer.
   if (std::optional<int64_t> cst = getConstantIntValue(allocSize)) {
-    auto staticBufferType =
-        MemRefType::get(width * cst.value(), b.getIntegerType(8));
+    auto staticBufferType = MemRefType::get(width.getFixedValue() * cst.value(),
+                                            b.getIntegerType(8));
     staticBufferType =
         MemRefType::Builder(staticBufferType).setMemorySpace(memorySpaceAttr);
     if (options.useAlloca) {
diff --git a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
index 8edd89f5d3a3122..dda011e95de3ae1 100644
--- a/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
+++ b/mlir/lib/Interfaces/DataLayoutInterfaces.cpp
@@ -34,31 +34,31 @@ using namespace mlir;
 
 /// Returns the bitwidth of the index type if specified in the param list.
 /// Assumes 64-bit index otherwise.
-static unsigned getIndexBitwidth(DataLayoutEntryListRef params) {
+static uint64_t getIndexBitwidth(DataLayoutEntryListRef params) {
   if (params.empty())
     return 64;
   auto attr = cast<IntegerAttr>(params.front().getValue());
   return attr.getValue().getZExtValue();
 }
 
-unsigned
+llvm::TypeSize
 mlir::detail::getDefaultTypeSize(Type type, const DataLayout &dataLayout,
                                  ArrayRef<DataLayoutEntryInterface> params) {
-  unsigned bits = getDefaultTypeSizeInBits(type, dataLayout, params);
-  return llvm::divideCeil(bits, 8);
+  llvm::TypeSize bits = getDefaultTypeSizeInBits(type, dataLayout, params);
+  return divideCeil(bits, 8);
 }
 
-unsigned mlir::detail::getDefaultTypeSizeInBits(Type type,
-                                                const DataLayout &dataLayout,
-                                                DataLayoutEntryListRef params) {
+llvm::TypeSize
+mlir::detail::getDefaultTypeSizeInBits(Type type, const DataLayout &dataLayout,
+                                       DataLayoutEntryListRef params) {
   if (isa<IntegerType, FloatType>(type))
-    return type.getIntOrFloatBitWidth();
+    return llvm::TypeSize::Fixed(type.getIntOrFloatBitWidth());
 
   if (auto ctype = dyn_cast<ComplexType>(type)) {
-    auto et = ctype.getElementType();
-    auto innerAlignment =
+    Type et = ctype.getElementType();
+    uint64_t innerAlignment =
         getDefaultPreferredAlignment(et, dataLayout, params) * 8;
-    auto innerSize = getDefaultTypeSizeInBits(et, dataLayout, params);
+    llvm::TypeSize innerSize = getDefaultTypeSizeInBits(et, dataLayout, params);
 
     // Include padding required to align the imaginary value in the complex
     // type.
@@ -102,35 +102,40 @@ findEntryForIntegerType(IntegerType intType,
   return iter->second;
 }
 
-static unsigned extractABIAlignment(DataLayoutEntryInterface entry) {
+constexpr const static uint64_t kDefaultBitsInByte = 8u;
+
+static uint64_t extractABIAlignment(DataLayoutEntryInterface entry) {
   auto values =
-      cast<DenseIntElementsAttr>(entry.getValue()).getValues<int32_t>();
-  return *values.begin() / 8u;
+      cast<DenseIntElementsAttr>(entry.getValue()).getValues<uint64_t>();
+  return static_cast<uint64_t>(*values.begin()) / kDefaultBitsInByte;
 }
 
-static unsigned
+static uint64_t
 getIntegerTypeABIAlignment(IntegerType intType,
                            ArrayRef<DataLayoutEntryInterface> params) {
+  constexpr uint64_t kDefaultSmallIntAlignment = 4u;
+  constexpr unsigned kSmallIntSize = 64;
   if (params.empty()) {
-    return intType.getWidth() < 64
-               ? llvm::PowerOf2Ceil(llvm::divideCeil(intType.getWidth(), 8))
-               : 4;
+    return intType.getWidth() < kSmallIntSize
+               ? llvm::PowerOf2Ceil(
+                     llvm::divideCeil(intType.getWidth(), kDefaultBitsInByte))
+               : kDefaultSmallIntAlignment;
   }
 
   return extractABIAlignment(findEntryForIntegerType(intType, params));
 }
 
-static unsigned
+static uint64_t
 getFloatTypeABIAlignment(FloatType fltType, const DataLayout &dataLayout,
                          ArrayRef<DataLayoutEntryInterface> params) {
   assert(params.size() <= 1 && "at most one data layout entry is expected for "
                                "the singleton floating-point type");
   if (params.empty())
-    return llvm::PowerOf2Ceil(dataLayout.getTypeSize(fltType));
+    return llvm::PowerOf2Ceil(dataLayout.getTypeSize(fltType).getFixedValue());
   return extractABIAlignment(params[0]);
 }
 
-unsigned mlir::detail::getDefaultABIAlignment(
+uint64_t mlir::detail::getDefaultABIAlignment(
     Type type, const DataLayout &dataLayout,
     ArrayRef<DataLayoutEntryInterface> params) {
   // Natural alignment is the closest power-of-two number above.
@@ -157,23 +162,23 @@ unsigned mlir::detail::getDefaultABIAlignment(
   reportMissingDataLayout(type);
 }
 
-static unsigned extractPreferredAlignment(DataLayoutEntryInterface entry) {
+static uint64_t extractPreferredAlignment(DataLayoutEntryInterface entry) {
   auto values =
-      cast<DenseIntElementsAttr>(entry.getValue()).getValues<int32_t>();
-  return *std::next(values.begin(), values.size() - 1) / 8u;
+      cast<DenseIntElementsAttr>(entry.getValue()).getValues<uint64_t>();
+  return *std::next(values.begin(), values.size() - 1) / kDefaultBitsInByte;
 }
 
-static unsigned
+static uint64_t
 getIntegerTypePreferredAlignment(IntegerType intType,
                                  const DataLayout &dataLayout,
                                  ArrayRef<DataLayoutEntryInterface> params) {
   if (params.empty())
-    return llvm::PowerOf2Ceil(dataLayout.getTypeSize(intType));
+    return llvm::PowerOf2Ceil(dataLayout.getTypeSize(intType).getFixedValue());
 
   return extractPreferredAlignment(findEntryForIntegerType(intType, params));
 }
 
-static unsigned
+static uint64_t
 getFloatTypePreferredAlignment(FloatType fltType, const DataLayout &dataLayout,
                                ArrayRef<DataLayoutEntryInterface> params) {
   assert(params.size() <= 1 && "at most one data layout entry is expected for "
@@ -183,7 +188,7 @@ getFloatTypePreferredAlignment(FloatType fltType, const DataLayout &dataLayout,
   return extractPreferredAlignment(params[0]);
 }
 
-unsigned mlir::detail::getDefaultPreferredAlignment(
+uint64_t mlir::detail::getDefaultPreferredAlignment(
     Type type, const DataLayout &dataLayout,
     ArrayRef<DataLayoutEntryInterface> params) {
   // Preferred alignment is same as natural for floats and vectors.
@@ -227,7 +232,7 @@ mlir::detail::getDefaultAllocaMemorySpace(DataLayoutEntryInterface entry) {
 
 // Returns the stack alignment if specified in the given entry. If the entry is
 // empty the default alignment zero is returned.
-unsigned
+uint64_t
 mlir::detail::getDefaultStackAlignment(DataLayoutEntryInterface entry) {
   if (entry == DataLayoutEntryInterface())
     return 0;
@@ -353,6 +358,13 @@ LogicalResult mlir::detail::verifyDataLayoutOp(Operation *op) {
   return success();
 }
 
+llvm::TypeSize mlir::detail::divideCeil(llvm::TypeSize numerator,
+                                        uint64_t denominator) {
+  uint64_t divided =
+      llvm::divideCeil(numerator.getKnownMinValue(), denominator);
+  return llvm::TypeSize::get(divided, numerator.isScalable());
+}
+
 //===----------------------------------------------------------------------===//
 // DataLayout
 //===----------------------------------------------------------------------===//
@@ -423,8 +435,9 @@ void mlir::DataLayout::checkValid() const {
 /// Looks up the value for the given type key in the given cache. If there is no
 /// such value in the cache, compute it using the given callback and put it in
 /// the cache before returning.
-static unsigned cachedLookup(Type t, DenseMap<Type, unsigned> &cache,
-                             function_ref<unsigned(Type)> compute) {
+template <typename T>
+static T cachedLookup(Type t, DenseMap<Type, T> &cache,
+                      function_ref<T(Type)> compute) {
   auto it = cache.find(t);
   if (it != cache.end())
     return it->second;
@@ -433,9 +446,9 @@ static unsigned cachedLookup(Type t, DenseMap<Type, unsigned> &cache,
   return result.first->second;
 }
 
-unsigned mlir::DataLayout::getTypeSize(Type t) const {
+llvm::TypeSize mlir::DataLayout::getTypeSize(Type t) const {
   checkValid();
-  return cachedLookup(t, sizes, [&](Type ty) {
+  return cachedLookup<llvm::TypeSize>(t, sizes, [&](Type ty) {
     DataLayoutEntryList list;
     if (originalLayout)
       list = originalLayout.getSpecForType(ty.getTypeID());
@@ -445,9 +458,9 @@ unsigned mlir::DataLayout::getTypeSize(Type t) const {
   });
 }
 
-unsigned mlir::DataLayout::getTypeSizeInBits(Type t) const {
+llvm::TypeSize mlir::DataLayout::getTypeSizeInBits(Type t) const {
   checkValid();
-  return cachedLookup(t, bitsizes, [&](Type ty) {
+  return cachedLookup<llvm::TypeSize>(t, bitsizes, [&](Type ty) {
     DataLayoutEntryList list;
     if (originalLayout)
       list = originalLayout.getSpecForType(ty.getTypeID());
@@ -457,9 +470,9 @@ unsigned mlir::DataLayout::getTypeSizeInBits(Type t) const {
   });
 }
 
-unsigned mlir::DataLayout::getTypeABIAlignment(Type t) const {
+uint64_t mlir::DataLayout::getTypeABIAlignment(Type t) const {
   checkValid();
-  return cachedLookup(t, abiAlignments, [&](Type ty) {
+  return cachedLookup<uint64_t>(t, abiAlignments, [&](Type ty) {
     DataLayoutEntryList list;
     if (originalLayout)
       list = originalLayout.getSpecForType(ty.getTypeID());
@@ -469,9 +482,9 @@ unsigned mlir::DataLayout::getTypeABIAlignment(Type t) const {
   });
 }
 
-unsigned mlir::DataLayout::getTypePreferredAlignment(Type t) const {
+uint64_t mlir::DataLayout::getTypePreferredAlignment(Type t) const {
   checkValid();
-  return cachedLookup(t, preferredAlignments, [&](Type ty) {
+  return cachedLookup<uint64_t>(t, preferredAlignments, [&](Type ty) {
     DataLayoutEntryList list;
     if (originalLayout)
       list = originalLayout.getSpecForType(ty.getTypeID());
@@ -497,7 +510,7 @@ mlir::Attribute mlir::DataLayout::getAllocaMemorySpace() const {
   return *allocaMemorySpace;
 }
 
-unsigned mlir::DataLayout::getStackAlignment() const {
+uint64_t mlir::DataLayout::getStackAlignment() const {
   checkValid();
   if (stackAlignment)
     return *stackAlignment;
@@ -556,14 +569,14 @@ LogicalResult mlir::detail::verifyDataLayoutSpec(DataLayoutSpecInterface spec,
     if (isa<IntegerType, FloatType>(sampleType)) {
       for (DataLayoutEntryInterface entry : kvp.second) {
         auto value = dyn_cast<DenseIntElementsAttr>(entry.getValue());
-        if (!value || !value.getElementType().isSignlessInteger(32)) {
-          emitError(loc) << "expected a dense i32 elements attribute in the "
+        if (!value || !value.getElementType().isSignlessInteger(64)) {
+          emitError(loc) << "expected a dense i64 elements attribute in the "
                             "data layout entry "
                          << entry;
           return failure();
         }
 
-        auto elements = llvm::to_vector<2>(value.getValues<int32_t>());
+        auto elements = llvm::to_vector<2>(value.getValues<uint64_t>());
         unsigned numElements = elements.size();
         if (numElements < 1 || numElements > 2) {
           emitError(loc) << "expected 1 or 2 elements in the data layout entry "
@@ -571,8 +584,8 @@ LogicalResult mlir::detail::verifyDataLayoutSpec(DataLayoutSpecInterface spec,
           return failure();
         }
 
-        int32_t abi = elements[0];
-        int32_t preferred = numElements == 2 ? elements[1] : abi;
+        uint64_t abi = elements[0];
+        uint64_t preferred = numElements == 2 ? elements[1] : abi;
         if (preferred < abi) {
           emitError(loc)
               << "preferred alignment is expected to be greater than or equal "
diff --git a/mlir/lib/Target/LLVMIR/DataLayoutImporter.cpp b/mlir/lib/Target/LLVMIR/DataLayoutImporter.cpp
index d19590600bb9a25..95f3cc074b1ddf7 100644
--- a/mlir/lib/Target/LLVMIR/DataLayoutImporter.cpp
+++ b/mlir/lib/Target/LLVMIR/DataLayoutImporter.cpp
@@ -56,21 +56,21 @@ DataLayoutImporter::tryToParseAlphaPrefix(StringRef &token) const {
   return prefix;
 }
 
-FailureOr<unsigned> DataLayoutImporter::tryToParseInt(StringRef &token) const {
-  unsigned parameter;
+FailureOr<uint64_t> DataLayoutImporter::tryToParseInt(StringRef &token) const {
+  uint64_t parameter;
   if (token.consumeInteger(/*Radix=*/10, parameter))
     return failure();
   return parameter;
 }
 
-FailureOr<SmallVector<unsigned>>
+FailureOr<SmallVector<uint64_t>>
 DataLayoutImporter::tryToParseIntList(StringRef token) const {
   SmallVector<StringRef> tokens;
   token.consume_front(":");
   token.split(tokens, ':');
 
   // Parse an integer list.
-  SmallVector<unsigned> results(tokens.size());
+  SmallVector<uint64_t> results(tokens.size());
   for (auto [result, token] : llvm::zip(results, tokens))
     if (token.getAsInteger(/*Radix=*/10, result))
       return failure();
@@ -79,7 +79,7 @@ DataLayoutImporter::tryToParseIntList(StringRef token) const {
 
 FailureOr<DenseIntElementsAttr>
 DataLayoutImporter::tryToParseAlignment(StringRef token) const {
-  FailureOr<SmallVector<unsigned>> alignment = tryToParseIntList(token);
+  FailureOr<SmallVector<uint64_t>> alignment = tryToParseIntList(token);
   if (failed(alignment))
     return failure();
   if (alignment->empty() || alignment->size() > 2)
@@ -89,16 +89,16 @@ DataLayoutImporter::tryToParseAlignment(StringRef token) const {
   // form <abi>[:<pref>], where abi specifies the minimal alignment and pref the
   // optional preferred alignment. The preferred alignment is set to the minimal
   // alignment if not available.
-  unsigned minimal = (*alignment)[0];
-  unsigned preferred = alignment->size() == 1 ? minimal : (*alignment)[1];
+  uint64_t minimal = (*alignment)[0];
+  uint64_t preferred = alignment->size() == 1 ? minimal : (*alignment)[1];
   return DenseIntElementsAttr::get(
-      VectorType::get({2}, IntegerType::get(context, 32)),
+      VectorType::get({2}, IntegerType::get(context, 64)),
       {minimal, preferred});
 }
 
 FailureOr<DenseIntElementsAttr>
 DataLayoutImporter::tryToParsePointerAlignment(StringRef token) const {
-  FailureOr<SmallVector<unsigned>> alignment = tryToParseIntList(token);
+  FailureOr<SmallVector<uint64_t>> alignment = tryToParseIntList(token);
   if (failed(alignment))
     return failure();
   if (alignment->size() < 2 || alignment->size() > 4)
@@ -110,12 +110,12 @@ DataLayoutImporter::tryToParsePointerAlignment(StringRef token) const {
   // idx the optional index computation bit width. The preferred alignment is
   // set to the minimal alignment if not available and the index computation
   // width is set to the pointer size if not available.
-  unsigned size = (*alignment)[0];
-  unsigned minimal = (*alignment)[1];
-  unsigned preferred = alignment->size() < 3 ? minimal : (*alignment)[2];
-  unsigned idx = alignment->size() < 4 ? size : (*alignment)[3];
-  return DenseIntElementsAttr::get(
-      VectorType::get({4}, IntegerType::get(context, 32)),
+  uint64_t size = (*alignment)[0];
+  uint64_t minimal = (*alignment)[1];
+  uint64_t preferred = alignment->size() < 3 ? minimal : (*alignment)[2];
+  uint64_t idx = alignment->size() < 4 ? size : (*alignment)[3];
+  return DenseIntElementsAttr::get<uint64_t>(
+      VectorType::get({4}, IntegerType::get(context, 64)),
       {size, minimal, preferred, idx});
 }
 
@@ -170,7 +170,7 @@ DataLayoutImporter::tryToEmplaceAllocaAddrSpaceEntry(StringRef token) {
   if (keyEntries.count(key))
     return success();
 
-  FailureOr<unsigned> space = tryToParseInt(token);
+  FailureOr<uint64_t> space = tryToParseInt(token);
   if (failed(space))
     return failure();
 
@@ -179,7 +179,10 @@ DataLayoutImporter::tryToEmplaceAllocaAddrSpaceEntry(StringRef token) {
     return success();
   OpBuilder builder(context);
   keyEntries.try_emplace(
-      key, DataLayoutEntryAttr::get(key, builder.getUI32IntegerAttr(*space)));
+      key,
+      DataLayoutEntryAttr::get(
+          key, builder.getIntegerAttr(
+                   builder.getIntegerType(64, /*isSigned=*/false), *space)));
   return success();
 }
 
@@ -190,7 +193,7 @@ DataLayoutImporter::tryToEmplaceStackAlignmentEntry(StringRef token) {
   if (keyEntries.count(key))
     return success();
 
-  FailureOr<unsigned> alignment = tryToParseInt(token);
+  FailureOr<uint64_t> alignment = tryToParseInt(token);
   if (failed(alignment))
     return failure();
 
@@ -199,7 +202,7 @@ DataLayoutImporter::tryToEmplaceStackAlignmentEntry(StringRef token) {
     return success();
   OpBuilder builder(context);
   keyEntries.try_emplace(key, DataLayoutEntryAttr::get(
-                                  key, builder.getI32IntegerAttr(*alignment)));
+                                  key, builder.getI64IntegerAttr(*alignment)));
   return success();
 }
 
@@ -258,7 +261,7 @@ void DataLayoutImporter::translateDataLayout(
     }
     // Parse integer alignment specifications.
     if (*prefix == "i") {
-      FailureOr<unsigned> width = tryToParseInt(token);
+      FailureOr<uint64_t> width = tryToParseInt(token);
       if (failed(width))
         return;
 
@@ -269,7 +272,7 @@ void DataLayoutImporter::translateDataLayout(
     }
     // Parse float alignment specifications.
     if (*prefix == "f") {
-      FailureOr<unsigned> width = tryToParseInt(token);
+      FailureOr<uint64_t> width = tryToParseInt(token);
       if (failed(width))
         return;
 
@@ -280,7 +283,7 @@ void DataLayoutImporter::translateDataLayout(
     }
     // Parse pointer alignment specifications.
     if (*prefix == "p") {
-      FailureOr<unsigned> space =
+      FailureOr<uint64_t> space =
           token.starts_with(":") ? 0 : tryToParseInt(token);
       if (failed(space))
         return;
diff --git a/mlir/lib/Target/LLVMIR/DataLayoutImporter.h b/mlir/lib/Target/LLVMIR/DataLayoutImporter.h
index 5c1606216037ed8..15f0f7ddf070597 100644
--- a/mlir/lib/Target/LLVMIR/DataLayoutImporter.h
+++ b/mlir/lib/Target/LLVMIR/DataLayoutImporter.h
@@ -73,10 +73,10 @@ class DataLayoutImporter {
 
   /// Tries to parse an integer parameter and removes the integer from the
   /// beginning of the string.
-  FailureOr<unsigned> tryToParseInt(StringRef &token) const;
+  FailureOr<uint64_t> tryToParseInt(StringRef &token) const;
 
   /// Tries to parse an integer parameter array.
-  FailureOr<SmallVector<unsigned>> tryToParseIntList(StringRef token) const;
+  FailureOr<SmallVector<uint64_t>> tryToParseIntList(StringRef token) const;
 
   /// Tries to parse the parameters of a type alignment entry.
   FailureOr<DenseIntElementsAttr> tryToParseAlignment(StringRef token) const;
diff --git a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
index 911c7141e45d5f2..ef1c8c21d54b08f 100644
--- a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
+++ b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
@@ -131,9 +131,9 @@ translateDataLayout(DataLayoutSpecInterface attribute,
               } else {
                 layoutStream << "f";
               }
-              unsigned size = dataLayout.getTypeSizeInBits(type);
-              unsigned abi = dataLayout.getTypeABIAlignment(type) * 8u;
-              unsigned preferred =
+              uint64_t size = dataLayout.getTypeSizeInBits(type);
+              uint64_t abi = dataLayout.getTypeABIAlignment(type) * 8u;
+              uint64_t preferred =
                   dataLayout.getTypePreferredAlignment(type) * 8u;
               layoutStream << size << ":" << abi;
               if (abi != preferred)
@@ -142,12 +142,12 @@ translateDataLayout(DataLayoutSpecInterface attribute,
             })
             .Case([&](LLVMPointerType ptrType) {
               layoutStream << "p" << ptrType.getAddressSpace() << ":";
-              unsigned size = dataLayout.getTypeSizeInBits(type);
-              unsigned abi = dataLayout.getTypeABIAlignment(type) * 8u;
-              unsigned preferred =
+              uint64_t size = dataLayout.getTypeSizeInBits(type);
+              uint64_t abi = dataLayout.getTypeABIAlignment(type) * 8u;
+              uint64_t preferred =
                   dataLayout.getTypePreferredAlignment(type) * 8u;
               layoutStream << size << ":" << abi << ":" << preferred;
-              if (std::optional<unsigned> index = extractPointerSpecValue(
+              if (std::optional<uint64_t> index = extractPointerSpecValue(
                       entry.getValue(), PtrDLEntryPos::Index))
                 layoutStream << ":" << *index;
               return success();
@@ -246,15 +246,15 @@ convertDenseElementsAttr(Location loc, DenseElementsAttr denseElementsAttr,
   // raw data.
   // TODO: we may also need to consider endianness when cross-compiling to an
   // architecture where it is different.
-  unsigned elementByteSize = denseElementsAttr.getRawData().size() /
-                             denseElementsAttr.getNumElements();
+  int64_t elementByteSize = denseElementsAttr.getRawData().size() /
+                            denseElementsAttr.getNumElements();
   if (8 * elementByteSize != innermostLLVMType->getScalarSizeInBits())
     return nullptr;
 
   // Compute the shape of all dimensions but the innermost. Note that the
   // innermost dimension may be that of the vector element type.
   bool hasVectorElementType = isa<VectorType>(type.getElementType());
-  unsigned numAggregates =
+  int64_t numAggregates =
       denseElementsAttr.getNumElements() /
       (hasVectorElementType ? 1
                             : denseElementsAttr.getType().getShape().back());
@@ -305,8 +305,8 @@ convertDenseElementsAttr(Location loc, DenseElementsAttr denseElementsAttr,
   // Create innermost constants and defer to the default constant creation
   // mechanism for other dimensions.
   SmallVector<llvm::Constant *> constants;
-  unsigned aggregateSize = denseElementsAttr.getType().getShape().back() *
-                           (innermostLLVMType->getScalarSizeInBits() / 8);
+  int64_t aggregateSize = denseElementsAttr.getType().getShape().back() *
+                          (innermostLLVMType->getScalarSizeInBits() / 8);
   constants.reserve(numAggregates);
   for (unsigned i = 0; i < numAggregates; ++i) {
     StringRef data(denseElementsAttr.getRawData().data() + i * aggregateSize,
diff --git a/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir b/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir
index 66dc30127ae741f..609fcb10b992c65 100644
--- a/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir
+++ b/mlir/test/Conversion/MemRefToLLVM/convert-dynamic-memref-ops.mlir
@@ -261,8 +261,8 @@ func.func @mixed_store(%mixed : memref<42x?xf32>, %i : index, %j : index, %val :
 // to set address spaces, so the constants below don't reflect the layout
 // Update this test once that data layout attribute works how we'd expect it to.
 module attributes { dlti.dl_spec = #dlti.dl_spec<
-  #dlti.dl_entry<!llvm.ptr, dense<[64, 64, 64]> : vector<3xi32>>,
-  #dlti.dl_entry<!llvm.ptr<1>, dense<[32, 32, 32]> : vector<3xi32>>> }  {
+  #dlti.dl_entry<!llvm.ptr, dense<[64, 64, 64]> : vector<3xi64>>,
+  #dlti.dl_entry<!llvm.ptr<1>, dense<[32, 32, 32]> : vector<3xi64>>> }  {
   // CHECK-LABEL: @memref_memory_space_cast
   func.func @memref_memory_space_cast(%input : memref<*xf32>) -> memref<*xf32, 1> {
     %cast = memref.memory_space_cast %input : memref<*xf32> to memref<*xf32, 1>
diff --git a/mlir/test/Dialect/LLVMIR/dynamic-gep-index.mlir b/mlir/test/Dialect/LLVMIR/dynamic-gep-index.mlir
index f5808134ea026b2..be0ce2f068284e7 100644
--- a/mlir/test/Dialect/LLVMIR/dynamic-gep-index.mlir
+++ b/mlir/test/Dialect/LLVMIR/dynamic-gep-index.mlir
@@ -1,6 +1,15 @@
 // RUN: mlir-opt %s | FileCheck %s
 
-module attributes {dlti.dl_spec = #dlti.dl_spec<#dlti.dl_entry<i1, dense<8> : vector<2xi32>>, #dlti.dl_entry<i8, dense<8> : vector<2xi32>>, #dlti.dl_entry<i16, dense<16> : vector<2xi32>>, #dlti.dl_entry<i32, dense<32> : vector<2xi32>>, #dlti.dl_entry<i64, dense<[32, 64]> : vector<2xi32>>, #dlti.dl_entry<f16, dense<16> : vector<2xi32>>, #dlti.dl_entry<f64, dense<64> : vector<2xi32>>, #dlti.dl_entry<f128, dense<128> : vector<2xi32>>>} {
+module attributes {
+  dlti.dl_spec = #dlti.dl_spec<
+    #dlti.dl_entry<i1, dense<8> : vector<2xi64>>,
+    #dlti.dl_entry<i8, dense<8> : vector<2xi64>>,
+    #dlti.dl_entry<i16, dense<16> : vector<2xi64>>,
+    #dlti.dl_entry<i32, dense<32> : vector<2xi64>>,
+    #dlti.dl_entry<i64, dense<[32, 64]> : vector<2xi64>>,
+    #dlti.dl_entry<f16, dense<16> : vector<2xi64>>,
+    #dlti.dl_entry<f64, dense<64> : vector<2xi64>>,
+    #dlti.dl_entry<f128, dense<128> : vector<2xi64>>>} {
   // CHECK: llvm.func @foo(%[[ARG0:.+]]: !llvm.ptr, %[[ARG1:.+]]: i32)
   llvm.func @foo(%arg0: !llvm.ptr, %arg1: i32) {
     // CHECK: %[[C0:.+]] = llvm.mlir.constant(0 : i32)
diff --git a/mlir/test/Dialect/LLVMIR/layout.mlir b/mlir/test/Dialect/LLVMIR/layout.mlir
index 363222b5ad912ef..fa75ce5d1fcf93c 100644
--- a/mlir/test/Dialect/LLVMIR/layout.mlir
+++ b/mlir/test/Dialect/LLVMIR/layout.mlir
@@ -31,11 +31,11 @@ module {
 // -----
 
 module attributes { dlti.dl_spec = #dlti.dl_spec<
-  #dlti.dl_entry<!llvm.ptr, dense<[32, 32, 64]> : vector<3xi32>>,
-  #dlti.dl_entry<!llvm.ptr<5>, dense<[64, 64, 64]> : vector<3xi32>>,
-  #dlti.dl_entry<!llvm.ptr<4>, dense<[32, 64, 64]> : vector<3xi32>>,
-  #dlti.dl_entry<"dlti.alloca_memory_space", 5 : ui32>,
-  #dlti.dl_entry<"dlti.stack_alignment", 128 : i32>
+  #dlti.dl_entry<!llvm.ptr, dense<[32, 32, 64]> : vector<3xi64>>,
+  #dlti.dl_entry<!llvm.ptr<5>, dense<[64, 64, 64]> : vector<3xi64>>,
+  #dlti.dl_entry<!llvm.ptr<4>, dense<[32, 64, 64]> : vector<3xi64>>,
+  #dlti.dl_entry<"dlti.alloca_memory_space", 5 : ui64>,
+  #dlti.dl_entry<"dlti.stack_alignment", 128 : i64>
 >} {
   // CHECK: @spec
   func.func @spec() {
@@ -73,7 +73,7 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<
     // CHECK: preferred = 8
     // CHECK: size = 4
     // CHECK: stack_alignment = 128
-	  "test.data_layout_query"() : () -> !llvm.ptr<4>
+    "test.data_layout_query"() : () -> !llvm.ptr<4>
     return
   }
 }
@@ -93,13 +93,22 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<
 
 // expected-error at below {{preferred alignment is expected to be at least as large as ABI alignment}}
 module attributes { dlti.dl_spec = #dlti.dl_spec<
-  #dlti.dl_entry<!llvm.ptr, dense<[64, 64, 32]> : vector<3xi32>>
+  #dlti.dl_entry<!llvm.ptr, dense<[64, 64, 32]> : vector<3xi64>>
 >} {
   func.func @pointer() {
     return
   }
 }
 
+// -----
+
+// expected-error @below {{expected i64 parameters for '!llvm.ptr'}}
+module attributes { dlti.dl_spec = #dlti.dl_spec<
+  #dlti.dl_entry<!llvm.ptr, dense<[32, 32, 64]> : vector<3xi32>>
+>} {
+}
+
+
 // -----
 
 module {
@@ -146,7 +155,7 @@ module {
 // -----
 
 module attributes { dlti.dl_spec = #dlti.dl_spec<
-  #dlti.dl_entry<!llvm.struct<()>, dense<[32, 32]> : vector<2xi32>>
+  #dlti.dl_entry<!llvm.struct<()>, dense<[32, 32]> : vector<2xi64>>
 >} {
     // CHECK: @spec
     func.func @spec() {
@@ -184,7 +193,7 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<
 // -----
 
 module attributes { dlti.dl_spec = #dlti.dl_spec<
-  #dlti.dl_entry<!llvm.struct<()>, dense<[32]> : vector<1xi32>>
+  #dlti.dl_entry<!llvm.struct<()>, dense<[32]> : vector<1xi64>>
 >} {
     // CHECK: @spec_without_preferred
     func.func @spec_without_preferred() {
@@ -202,7 +211,7 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<
 
 // expected-error at below {{unexpected layout attribute for struct '!llvm.struct<(i8)>'}}
 module attributes { dlti.dl_spec = #dlti.dl_spec<
-  #dlti.dl_entry<!llvm.struct<(i8)>, dense<[64, 64]> : vector<2xi32>>
+  #dlti.dl_entry<!llvm.struct<(i8)>, dense<[64, 64]> : vector<2xi64>>
 >} {
   func.func @struct() {
     return
@@ -213,7 +222,7 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<
 
 // expected-error at below {{expected layout attribute for '!llvm.struct<()>' to be a dense integer elements attribute of 1 or 2 elements}}
 module attributes { dlti.dl_spec = #dlti.dl_spec<
-  #dlti.dl_entry<!llvm.struct<()>, dense<[64, 64, 64]> : vector<3xi32>>
+  #dlti.dl_entry<!llvm.struct<()>, dense<[64, 64, 64]> : vector<3xi64>>
 >} {
   func.func @struct() {
     return
@@ -224,7 +233,7 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<
 
 // expected-error at below {{preferred alignment is expected to be at least as large as ABI alignment}}
 module attributes { dlti.dl_spec = #dlti.dl_spec<
-  #dlti.dl_entry<!llvm.struct<()>, dense<[64, 32]> : vector<2xi32>>
+  #dlti.dl_entry<!llvm.struct<()>, dense<[64, 32]> : vector<2xi64>>
 >} {
   func.func @struct() {
     return
@@ -263,7 +272,7 @@ module {
 // -----
 
 module attributes { dlti.dl_spec = #dlti.dl_spec<
-  #dlti.dl_entry<!llvm.struct<()>, dense<[64]> : vector<1xi32>>
+  #dlti.dl_entry<!llvm.struct<()>, dense<[64]> : vector<1xi64>>
 >} {
     // CHECK: @overaligned
     func.func @overaligned() {
@@ -276,3 +285,12 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<
          return
     }
 }
+
+// -----
+
+
+// expected-error @below {{expected i64 entries for '!llvm.struct<()>'}}
+module attributes { dlti.dl_spec = #dlti.dl_spec<
+  #dlti.dl_entry<!llvm.struct<()>, dense<[64]> : vector<1xi32>>
+>} {
+}
diff --git a/mlir/test/Interfaces/DataLayoutInterfaces/query.mlir b/mlir/test/Interfaces/DataLayoutInterfaces/query.mlir
index 816cc0686d51d46..9f9240ac6f8cea8 100644
--- a/mlir/test/Interfaces/DataLayoutInterfaces/query.mlir
+++ b/mlir/test/Interfaces/DataLayoutInterfaces/query.mlir
@@ -216,8 +216,8 @@ func.func @integers() {
     "test.data_layout_query"() : () -> i128
     "test.maybe_terminator"() : () -> ()
   }) { dlti.dl_spec = #dlti.dl_spec<
-      #dlti.dl_entry<i32, dense<64> : vector<1xi32>>,
-      #dlti.dl_entry<i64, dense<128> : vector<1xi32>>
+      #dlti.dl_entry<i32, dense<64> : vector<1xi64>>,
+      #dlti.dl_entry<i64, dense<128> : vector<1xi64>>
     >} : () -> ()
   "test.op_with_data_layout"() ({
     // CHECK: alignment = 8
@@ -238,8 +238,8 @@ func.func @integers() {
     "test.data_layout_query"() : () -> i128
     "test.maybe_terminator"() : () -> ()
   }) { dlti.dl_spec = #dlti.dl_spec<
-      #dlti.dl_entry<i32, dense<[64, 128]> : vector<2xi32>>,
-      #dlti.dl_entry<i64, dense<[128, 256]> : vector<2xi32>>
+      #dlti.dl_entry<i32, dense<[64, 128]> : vector<2xi64>>,
+      #dlti.dl_entry<i64, dense<[128, 256]> : vector<2xi64>>
     >} : () -> ()
   return
 }
@@ -256,8 +256,8 @@ func.func @floats() {
     "test.data_layout_query"() : () -> f80
     "test.maybe_terminator"() : () -> ()
   }) { dlti.dl_spec = #dlti.dl_spec<
-      #dlti.dl_entry<f32, dense<64> : vector<1xi32>>,
-      #dlti.dl_entry<f80, dense<128> : vector<1xi32>>
+      #dlti.dl_entry<f32, dense<64> : vector<1xi64>>,
+      #dlti.dl_entry<f80, dense<128> : vector<1xi64>>
     >} : () -> ()
   "test.op_with_data_layout"() ({
     // CHECK: alignment = 8
@@ -270,8 +270,8 @@ func.func @floats() {
     "test.data_layout_query"() : () -> f80
     "test.maybe_terminator"() : () -> ()
   }) { dlti.dl_spec = #dlti.dl_spec<
-      #dlti.dl_entry<f32, dense<[64, 128]> : vector<2xi32>>,
-      #dlti.dl_entry<f80, dense<[128, 256]> : vector<2xi32>>
+      #dlti.dl_entry<f32, dense<[64, 128]> : vector<2xi64>>,
+      #dlti.dl_entry<f80, dense<[128, 256]> : vector<2xi64>>
     >} : () -> ()
   return
 }
diff --git a/mlir/test/Interfaces/DataLayoutInterfaces/types.mlir b/mlir/test/Interfaces/DataLayoutInterfaces/types.mlir
index e45ec816fcbf79a..55bb1d2eac911cd 100644
--- a/mlir/test/Interfaces/DataLayoutInterfaces/types.mlir
+++ b/mlir/test/Interfaces/DataLayoutInterfaces/types.mlir
@@ -7,23 +7,23 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<
 
 // -----
 
-// expected-error at below {{expected a dense i32 elements attribute}}
+// expected-error at below {{expected a dense i64 elements attribute}}
 module attributes {dlti.dl_spec = #dlti.dl_spec<
-#dlti.dl_entry<i32, dense<[64,128]> : vector<2xi64>>>
+#dlti.dl_entry<i32, dense<[64,128]> : vector<2xi32>>>
 } {}
 
 // -----
 
 // expected-error at below {{expected 1 or 2 elements}}
 module attributes {dlti.dl_spec = #dlti.dl_spec<
-#dlti.dl_entry<i32, dense<[64,64,64]> : vector<3xi32>>>
+#dlti.dl_entry<i32, dense<[64,64,64]> : vector<3xi64>>>
 } {}
 
 // -----
 
 // expected-error at below {{preferred alignment is expected to be greater than or equal to the abi alignment}}
 module attributes {dlti.dl_spec = #dlti.dl_spec<
-#dlti.dl_entry<i32, dense<[64,32]> : vector<2xi32>>>
+#dlti.dl_entry<i32, dense<[64,32]> : vector<2xi64>>>
 } {}
 
 // -----
diff --git a/mlir/test/Target/LLVMIR/Import/data-layout.ll b/mlir/test/Target/LLVMIR/Import/data-layout.ll
index 4336f0dbbc4a915..de90ac1e271140b 100644
--- a/mlir/test/Target/LLVMIR/Import/data-layout.ll
+++ b/mlir/test/Target/LLVMIR/Import/data-layout.ll
@@ -5,15 +5,15 @@
 ; CHECK: dlti.dl_spec =
 ; CHECK: #dlti.dl_spec<
 ; CHECK-DAG:   #dlti.dl_entry<"dlti.endianness", "little">
-; CHECK-DAG:   #dlti.dl_entry<i1, dense<8> : vector<2xi32>>
-; CHECK-DAG:   #dlti.dl_entry<i8, dense<8> : vector<2xi32>>
-; CHECK-DAG:   #dlti.dl_entry<i16, dense<16> : vector<2xi32>>
-; CHECK-DAG:   #dlti.dl_entry<i32, dense<32> : vector<2xi32>>
-; CHECK-DAG:   #dlti.dl_entry<i64, dense<[32, 64]> : vector<2xi32>>
-; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr, dense<64> : vector<4xi32>>
-; CHECK-DAG:   #dlti.dl_entry<f16, dense<16> : vector<2xi32>>
-; CHECK-DAG:   #dlti.dl_entry<f64, dense<64> : vector<2xi32>>
-; CHECK-DAG:   #dlti.dl_entry<f128, dense<128> : vector<2xi32>>
+; CHECK-DAG:   #dlti.dl_entry<i1, dense<8> : vector<2xi64>>
+; CHECK-DAG:   #dlti.dl_entry<i8, dense<8> : vector<2xi64>>
+; CHECK-DAG:   #dlti.dl_entry<i16, dense<16> : vector<2xi64>>
+; CHECK-DAG:   #dlti.dl_entry<i32, dense<32> : vector<2xi64>>
+; CHECK-DAG:   #dlti.dl_entry<i64, dense<[32, 64]> : vector<2xi64>>
+; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr, dense<64> : vector<4xi64>>
+; CHECK-DAG:   #dlti.dl_entry<f16, dense<16> : vector<2xi64>>
+; CHECK-DAG:   #dlti.dl_entry<f64, dense<64> : vector<2xi64>>
+; CHECK-DAG:   #dlti.dl_entry<f128, dense<128> : vector<2xi64>>
 ; CHECK: >
 target datalayout = ""
 
@@ -22,13 +22,13 @@ target datalayout = ""
 ; CHECK: dlti.dl_spec =
 ; CHECK: #dlti.dl_spec<
 ; CHECK-DAG:   #dlti.dl_entry<"dlti.endianness", "little">
-; CHECK-DAG:   #dlti.dl_entry<i64, dense<64> : vector<2xi32>>
-; CHECK-DAG:   #dlti.dl_entry<f80, dense<128> : vector<2xi32>>
-; CHECK-DAG:   #dlti.dl_entry<i8, dense<8> : vector<2xi32>>
-; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr<270>, dense<[32, 64, 64, 32]> : vector<4xi32>>
-; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr<271>, dense<32> : vector<4xi32>>
-; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr<272>, dense<64> : vector<4xi32>>
-; CHECK-DAG:   #dlti.dl_entry<"dlti.stack_alignment", 128 : i32>
+; CHECK-DAG:   #dlti.dl_entry<i64, dense<64> : vector<2xi64>>
+; CHECK-DAG:   #dlti.dl_entry<f80, dense<128> : vector<2xi64>>
+; CHECK-DAG:   #dlti.dl_entry<i8, dense<8> : vector<2xi64>>
+; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr<270>, dense<[32, 64, 64, 32]> : vector<4xi64>>
+; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr<271>, dense<32> : vector<4xi64>>
+; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr<272>, dense<64> : vector<4xi64>>
+; CHECK-DAG:   #dlti.dl_entry<"dlti.stack_alignment", 128 : i64>
 target datalayout = "e-m:e-p270:32:64-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
 
 ; // -----
@@ -36,10 +36,10 @@ target datalayout = "e-m:e-p270:32:64-p271:32:32-p272:64:64-i64:64-f80:128-n8:16
 ; CHECK: dlti.dl_spec =
 ; CHECK: #dlti.dl_spec<
 ; CHECK-DAG:   #dlti.dl_entry<"dlti.endianness", "big">
-; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr<270>, dense<[16, 32, 64, 8]> : vector<4xi32>>
-; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr<271>, dense<[16, 32, 64, 16]> : vector<4xi32>>
-; CHECK-DAG:   #dlti.dl_entry<"dlti.alloca_memory_space", 1 : ui32>
-; CHECK-DAG:   #dlti.dl_entry<i64, dense<[64, 128]> : vector<2xi32>>
+; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr<270>, dense<[16, 32, 64, 8]> : vector<4xi64>>
+; CHECK-DAG:   #dlti.dl_entry<!llvm.ptr<271>, dense<[16, 32, 64, 16]> : vector<4xi64>>
+; CHECK-DAG:   #dlti.dl_entry<"dlti.alloca_memory_space", 1 : ui64>
+; CHECK-DAG:   #dlti.dl_entry<i64, dense<[64, 128]> : vector<2xi64>>
 target datalayout = "A1-E-p270:16:32:64:8-p271:16:32:64-i64:64:128"
 
 ; // -----
diff --git a/mlir/test/Target/LLVMIR/data-layout.mlir b/mlir/test/Target/LLVMIR/data-layout.mlir
index f1304e12c303d4b..e61972a0dd97646 100644
--- a/mlir/test/Target/LLVMIR/data-layout.mlir
+++ b/mlir/test/Target/LLVMIR/data-layout.mlir
@@ -13,10 +13,10 @@ module attributes {dlti.dl_spec = #dlti.dl_spec<
 #dlti.dl_entry<"dlti.alloca_memory_space", 4 : ui32>,
 #dlti.dl_entry<"dlti.stack_alignment", 128 : i32>,
 #dlti.dl_entry<index, 64>,
-#dlti.dl_entry<i64, dense<[64,128]> : vector<2xi32>>,
-#dlti.dl_entry<f80, dense<[128,256]> : vector<2xi32>>,
-#dlti.dl_entry<!llvm.ptr, dense<[32,64,128]> : vector<3xi32>>,
-#dlti.dl_entry<!llvm.ptr<1>, dense<[32,32,32,16]> : vector<4xi32>>
+#dlti.dl_entry<i64, dense<[64,128]> : vector<2xi64>>,
+#dlti.dl_entry<f80, dense<[128,256]> : vector<2xi64>>,
+#dlti.dl_entry<!llvm.ptr, dense<[32,64,128]> : vector<3xi64>>,
+#dlti.dl_entry<!llvm.ptr<1>, dense<[32,32,32,16]> : vector<4xi64>>
 >} {
   llvm.func @foo() {
     llvm.return
@@ -43,19 +43,19 @@ module attributes {dlti.dl_spec = #dlti.dl_spec<
 
 // expected-error at below {{unsupported data layout for non-signless integer 'ui64'}}
 module attributes {dlti.dl_spec = #dlti.dl_spec<
-#dlti.dl_entry<ui64, dense<[64,128]> : vector<2xi32>>>
+#dlti.dl_entry<ui64, dense<[64,128]> : vector<2xi64>>>
 } {}
 
 // -----
 
 // expected-error at below {{unsupported type in data layout: 'bf16'}}
 module attributes {dlti.dl_spec = #dlti.dl_spec<
-#dlti.dl_entry<bf16, dense<[64,128]> : vector<2xi32>>>
+#dlti.dl_entry<bf16, dense<[64,128]> : vector<2xi64>>>
 } {}
 
 // -----
 
 // expected-error at below {{unsupported data layout key "foo"}}
 module attributes {dlti.dl_spec = #dlti.dl_spec<
-#dlti.dl_entry<"foo", dense<[64,128]> : vector<2xi32>>>
+#dlti.dl_entry<"foo", dense<[64,128]> : vector<2xi64>>>
 } {}
diff --git a/mlir/test/lib/Dialect/Test/TestTypeDefs.td b/mlir/test/lib/Dialect/Test/TestTypeDefs.td
index 2a8bdad8fb25d98..1957845c842f208 100644
--- a/mlir/test/lib/Dialect/Test/TestTypeDefs.td
+++ b/mlir/test/lib/Dialect/Test/TestTypeDefs.td
@@ -157,7 +157,7 @@ def TestTypeWithLayoutType : Test_Type<"TestTypeWithLayout", [
                                 ::mlir::Location loc) const;
 
   private:
-    unsigned extractKind(::mlir::DataLayoutEntryListRef params,
+    uint64_t extractKind(::mlir::DataLayoutEntryListRef params,
                          ::llvm::StringRef expectedKind) const;
 
   public:
diff --git a/mlir/test/lib/Dialect/Test/TestTypes.cpp b/mlir/test/lib/Dialect/Test/TestTypes.cpp
index abb35d71d7f6d58..cb7ef7f17499999 100644
--- a/mlir/test/lib/Dialect/Test/TestTypes.cpp
+++ b/mlir/test/lib/Dialect/Test/TestTypes.cpp
@@ -21,6 +21,7 @@
 #include "llvm/ADT/Hashing.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/TypeSwitch.h"
+#include "llvm/Support/TypeSize.h"
 #include <optional>
 
 using namespace mlir;
@@ -258,19 +259,19 @@ void TestTypeWithLayoutType::print(AsmPrinter &printer) const {
   printer << "<" << getKey() << ">";
 }
 
-unsigned
+llvm::TypeSize
 TestTypeWithLayoutType::getTypeSizeInBits(const DataLayout &dataLayout,
                                           DataLayoutEntryListRef params) const {
-  return extractKind(params, "size");
+  return llvm::TypeSize::Fixed(extractKind(params, "size"));
 }
 
-unsigned
+uint64_t
 TestTypeWithLayoutType::getABIAlignment(const DataLayout &dataLayout,
                                         DataLayoutEntryListRef params) const {
   return extractKind(params, "alignment");
 }
 
-unsigned TestTypeWithLayoutType::getPreferredAlignment(
+uint64_t TestTypeWithLayoutType::getPreferredAlignment(
     const DataLayout &dataLayout, DataLayoutEntryListRef params) const {
   return extractKind(params, "preferred");
 }
@@ -303,7 +304,7 @@ TestTypeWithLayoutType::verifyEntries(DataLayoutEntryListRef params,
   return success();
 }
 
-unsigned TestTypeWithLayoutType::extractKind(DataLayoutEntryListRef params,
+uint64_t TestTypeWithLayoutType::extractKind(DataLayoutEntryListRef params,
                                              StringRef expectedKind) const {
   for (DataLayoutEntryInterface entry : params) {
     ArrayRef<Attribute> pair =
diff --git a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
index dcb7d9684bb358b..a27b95ca4614b01 100644
--- a/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
+++ b/mlir/unittests/Interfaces/DataLayoutInterfacesTest.cpp
@@ -85,17 +85,17 @@ struct SingleQueryType
 
   static SingleQueryType get(MLIRContext *ctx) { return Base::get(ctx); }
 
-  unsigned getTypeSizeInBits(const DataLayout &layout,
-                             DataLayoutEntryListRef params) const {
+  llvm::TypeSize getTypeSizeInBits(const DataLayout &layout,
+                                   DataLayoutEntryListRef params) const {
     static bool executed = false;
     if (executed)
       llvm::report_fatal_error("repeated call");
 
     executed = true;
-    return 1;
+    return llvm::TypeSize::Fixed(1);
   }
 
-  unsigned getABIAlignment(const DataLayout &layout,
+  uint64_t getABIAlignment(const DataLayout &layout,
                            DataLayoutEntryListRef params) {
     static bool executed = false;
     if (executed)
@@ -105,7 +105,7 @@ struct SingleQueryType
     return 2;
   }
 
-  unsigned getPreferredAlignment(const DataLayout &layout,
+  uint64_t getPreferredAlignment(const DataLayout &layout,
                                  DataLayoutEntryListRef params) {
     static bool executed = false;
     if (executed)
@@ -149,8 +149,9 @@ struct OpWithLayout : public Op<OpWithLayout, DataLayoutOpInterface::Trait> {
     return getOperation()->getAttrOfType<DataLayoutSpecInterface>(kAttrName);
   }
 
-  static unsigned getTypeSizeInBits(Type type, const DataLayout &dataLayout,
-                                    DataLayoutEntryListRef params) {
+  static llvm::TypeSize getTypeSizeInBits(Type type,
+                                          const DataLayout &dataLayout,
+                                          DataLayoutEntryListRef params) {
     // Make a recursive query.
     if (isa<FloatType>(type))
       return dataLayout.getTypeSizeInBits(
@@ -160,21 +161,22 @@ struct OpWithLayout : public Op<OpWithLayout, DataLayoutOpInterface::Trait> {
     if (auto iType = dyn_cast<IntegerType>(type)) {
       for (DataLayoutEntryInterface entry : params)
         if (llvm::dyn_cast_if_present<Type>(entry.getKey()) == type)
-          return 8 *
-                 cast<IntegerAttr>(entry.getValue()).getValue().getZExtValue();
-      return 8 * iType.getIntOrFloatBitWidth();
+          return llvm::TypeSize::Fixed(
+              8 *
+              cast<IntegerAttr>(entry.getValue()).getValue().getZExtValue());
+      return llvm::TypeSize::Fixed(8 * iType.getIntOrFloatBitWidth());
     }
 
     // Use the default process for everything else.
     return detail::getDefaultTypeSize(type, dataLayout, params);
   }
 
-  static unsigned getTypeABIAlignment(Type type, const DataLayout &dataLayout,
+  static uint64_t getTypeABIAlignment(Type type, const DataLayout &dataLayout,
                                       DataLayoutEntryListRef params) {
     return llvm::PowerOf2Ceil(getTypeSize(type, dataLayout, params));
   }
 
-  static unsigned getTypePreferredAlignment(Type type,
+  static uint64_t getTypePreferredAlignment(Type type,
                                             const DataLayout &dataLayout,
                                             DataLayoutEntryListRef params) {
     return 2 * getTypeABIAlignment(type, dataLayout, params);
@@ -195,9 +197,9 @@ struct OpWith7BitByte
   }
 
   // Bytes are assumed to be 7-bit here.
-  static unsigned getTypeSize(Type type, const DataLayout &dataLayout,
-                              DataLayoutEntryListRef params) {
-    return llvm::divideCeil(dataLayout.getTypeSizeInBits(type), 7);
+  static llvm::TypeSize getTypeSize(Type type, const DataLayout &dataLayout,
+                                    DataLayoutEntryListRef params) {
+    return mlir::detail::divideCeil(dataLayout.getTypeSizeInBits(type), 7);
   }
 };
 

>From 77cfc664125a52bcc1412e550f5181c5391ff745 Mon Sep 17 00:00:00 2001
From: Alex Zinenko <zinenko at google.com>
Date: Mon, 20 Nov 2023 14:14:51 +0000
Subject: [PATCH 2/3] add test

---
 mlir/test/Dialect/LLVMIR/inline-byval-huge.mlir | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 mlir/test/Dialect/LLVMIR/inline-byval-huge.mlir

diff --git a/mlir/test/Dialect/LLVMIR/inline-byval-huge.mlir b/mlir/test/Dialect/LLVMIR/inline-byval-huge.mlir
new file mode 100644
index 000000000000000..3e246d7f21d5f88
--- /dev/null
+++ b/mlir/test/Dialect/LLVMIR/inline-byval-huge.mlir
@@ -0,0 +1,14 @@
+// RUN: mlir-opt -inline %s | FileCheck %s
+
+// CHECK-LABEL: @byval_2_000_000_000
+llvm.func @byval_2_000_000_000(%ptr : !llvm.ptr) {
+  // CHECK: %[[SIZE:.+]] = llvm.mlir.constant(2000000000 : i64)
+  // CHECK: "llvm.intr.memcpy"(%{{.*}}, %{{.*}}, %[[SIZE]]
+
+  llvm.call @with_byval_arg(%ptr) : (!llvm.ptr) -> ()
+  llvm.return
+}
+
+llvm.func @with_byval_arg(%ptr : !llvm.ptr { llvm.byval = !llvm.array<1000 x array<1000 x array <500 x i32>>> }) {
+  llvm.return
+}

>From c07eeaafd0ef4ed2502c2de37b008d9a36dfdd9c Mon Sep 17 00:00:00 2001
From: Alex Zinenko <zinenko at google.com>
Date: Tue, 21 Nov 2023 13:07:48 +0000
Subject: [PATCH 3/3] address review

---
 llvm/include/llvm/Support/TypeSize.h | 8 --------
 mlir/test/Dialect/LLVMIR/layout.mlir | 2 --
 2 files changed, 10 deletions(-)

diff --git a/llvm/include/llvm/Support/TypeSize.h b/llvm/include/llvm/Support/TypeSize.h
index 6afda46dd9eb69a..8e638f8278e828b 100644
--- a/llvm/include/llvm/Support/TypeSize.h
+++ b/llvm/include/llvm/Support/TypeSize.h
@@ -244,14 +244,6 @@ template <typename LeafTy, typename ValueTy> class FixedOrScalableQuantity {
         isScalable());
   }
 
-  /// Returns a value X where the known coefficient will be rounded up to the
-  /// closest power-of-two, except for the zero coefficient that remains zero.
-  constexpr LeafTy coefficientPowerOf2Ceil() const {
-    return LeafTy::get(
-        static_cast<ScalarTy>(llvm::PowerOf2Ceil(getKnownMinValue())),
-        isScalable());
-  }
-
   /// Returns true if there exists a value X where RHS.multiplyCoefficientBy(X)
   /// will result in a value whose quantity matches our own.
   constexpr bool
diff --git a/mlir/test/Dialect/LLVMIR/layout.mlir b/mlir/test/Dialect/LLVMIR/layout.mlir
index fa75ce5d1fcf93c..99d61785384487a 100644
--- a/mlir/test/Dialect/LLVMIR/layout.mlir
+++ b/mlir/test/Dialect/LLVMIR/layout.mlir
@@ -108,7 +108,6 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<
 >} {
 }
 
-
 // -----
 
 module {
@@ -288,7 +287,6 @@ module attributes { dlti.dl_spec = #dlti.dl_spec<
 
 // -----
 
-
 // expected-error @below {{expected i64 entries for '!llvm.struct<()>'}}
 module attributes { dlti.dl_spec = #dlti.dl_spec<
   #dlti.dl_entry<!llvm.struct<()>, dense<[64]> : vector<1xi32>>



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