[Mlir-commits] [mlir] 70e3f0e - [mlir][llvm] Handle llvm.noundef attribute when converting to LLVM IR
Victor Perez
llvmlistbot at llvm.org
Thu Oct 20 05:01:48 PDT 2022
Author: Victor Perez
Date: 2022-10-20T12:59:47+01:00
New Revision: 70e3f0e10e8ca0ef8a157615b2c3a2f49c7b637a
URL: https://github.com/llvm/llvm-project/commit/70e3f0e10e8ca0ef8a157615b2c3a2f49c7b637a
DIFF: https://github.com/llvm/llvm-project/commit/70e3f0e10e8ca0ef8a157615b2c3a2f49c7b637a.diff
LOG: [mlir][llvm] Handle llvm.noundef attribute when converting to LLVM IR
Translate LLVMIR llvm.noundef attribute to its equivalent in LLVM IR.
Reviewed By: ftynse
Differential Revision: https://reviews.llvm.org/D136324
Added:
Modified:
mlir/include/mlir/Dialect/LLVMIR/LLVMOpBase.td
mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
mlir/test/Target/LLVMIR/llvmir.mlir
Removed:
################################################################################
diff --git a/mlir/include/mlir/Dialect/LLVMIR/LLVMOpBase.td b/mlir/include/mlir/Dialect/LLVMIR/LLVMOpBase.td
index 8f63e98aec982..e4f92992b1955 100644
--- a/mlir/include/mlir/Dialect/LLVMIR/LLVMOpBase.td
+++ b/mlir/include/mlir/Dialect/LLVMIR/LLVMOpBase.td
@@ -49,6 +49,7 @@ def LLVM_Dialect : Dialect {
static StringRef getByRefAttrName() { return "llvm.byref"; }
static StringRef getStructRetAttrName() { return "llvm.sret"; }
static StringRef getInAllocaAttrName() { return "llvm.inalloca"; }
+ static StringRef getNoUndefAttrName() { return "llvm.noundef"; }
/// Verifies if the attribute is a well-formed value for "llvm.struct_attrs"
static LogicalResult verifyStructAttr(
diff --git a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
index 15036116e8abc..26bc99f53a568 100644
--- a/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
+++ b/mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
@@ -917,6 +917,13 @@ LogicalResult ModuleTranslation::convertOneFunction(LLVMFuncOp func) {
.addAttribute(llvm::Attribute::Nest));
}
+ if (auto attr = func.getArgAttrOfType<UnitAttr>(
+ argIdx, LLVMDialect::getNoUndefAttrName())) {
+ // llvm.noundef can be added to any argument type.
+ llvmArg.addAttrs(llvm::AttrBuilder(llvmArg.getContext())
+ .addAttribute(llvm::Attribute::NoUndef));
+ }
+
mapValue(mlirArg, &llvmArg);
argIdx++;
}
diff --git a/mlir/test/Target/LLVMIR/llvmir.mlir b/mlir/test/Target/LLVMIR/llvmir.mlir
index 51538743027b0..5a13e86714b35 100644
--- a/mlir/test/Target/LLVMIR/llvmir.mlir
+++ b/mlir/test/Target/LLVMIR/llvmir.mlir
@@ -1064,6 +1064,11 @@ llvm.func @nestattr(%arg0: !llvm.ptr<i32> {llvm.nest}) {
llvm.return
}
+// CHECK-LABEL: define void @noundefattr(i32 noundef %
+llvm.func @noundefattr(%arg0: i32 {llvm.noundef}) {
+ llvm.return
+}
+
// CHECK-LABEL: define void @llvm_align(ptr align 4 {{%*.}})
llvm.func @llvm_align(%arg0: !llvm.ptr<f32> {llvm.align = 4}) {
llvm.return
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