[Mlir-commits] [mlir] [MLIR][LLVM] DI Expression Rewrite & Legalization (PR #77541)

[Jeff Niu]

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@@ -0,0 +1,44 @@
+//===- DIExpressionLegalization.h - DIExpression Legalization Patterns ----===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Declarations for known legalization patterns for DIExpressions that should
+// be performed before translation into llvm.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef MLIR_DIALECT_LLVMIR_TRANSFORMS_DIEXPRESSIONLEGALIZATION_H
+#define MLIR_DIALECT_LLVMIR_TRANSFORMS_DIEXPRESSIONLEGALIZATION_H
+
+#include "mlir/Dialect/LLVMIR/Transforms/DIExpressionRewriter.h"
+
+namespace mlir {
+namespace LLVM {
+
+//===----------------------------------------------------------------------===//
+// Rewrite Patterns
+//===----------------------------------------------------------------------===//
+
+/// Adjacent DW_OP_LLVM_fragment should be merged into one.
----------------
Mogball wrote:

suggestion: please elaborate with a short psuedocode example, like `expr(frag, frag) -> expr(frag)` or something.

https://github.com/llvm/llvm-project/pull/77541