[Mlir-commits] [mlir] [mlir] Add pass to add comdat to all linkonce functions (PR #65270)

[Mehdi Amini]

================
@@ -0,0 +1,56 @@
+//===- AddComdats.cpp - Add comdats to linkonce functions -----------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "mlir/Dialect/LLVMIR/Transforms/AddComdats.h"
+#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
+#include "mlir/Pass/Pass.h"
+
+namespace mlir {
+namespace LLVM {
+#define GEN_PASS_DEF_LLVMADDCOMDATS
+#include "mlir/Dialect/LLVMIR/Transforms/Passes.h.inc"
+} // namespace LLVM
+} // namespace mlir
+
+using namespace mlir;
+
+static void addComdat(LLVM::LLVMFuncOp &op, OpBuilder &builder,
+                      ModuleOp &module) {
+  const char *comdatName = "__llvm_comdat";
+  mlir::LLVM::ComdatOp comdatOp =
+      module.lookupSymbol<mlir::LLVM::ComdatOp>(comdatName);
+  if (!comdatOp) {
+    PatternRewriter::InsertionGuard guard(builder);
+    builder.setInsertionPointToStart(module.getBody());
+    comdatOp =
+        builder.create<mlir::LLVM::ComdatOp>(module.getLoc(), comdatName);
----------------
joker-eph wrote:

This will need to be inserted in the SymbolTable

https://github.com/llvm/llvm-project/pull/65270