[clang] [CIR][NFC] Add TargetLowering pass (PR #179245)

[Henrich Lauko via cfe-commits]

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@@ -0,0 +1,77 @@
+//===- TargetLowering.cpp -------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the cir-target-lowering pass.
+//
+//===----------------------------------------------------------------------===//
+
+#include "TargetLowering/LowerModule.h"
+
+#include "mlir/Support/LLVM.h"
+#include "clang/CIR/Dialect/Passes.h"
+#include "llvm/ADT/TypeSwitch.h"
+
+using namespace mlir;
+using namespace cir;
+
+namespace mlir {
+#define GEN_PASS_DEF_TARGETLOWERING
+#include "clang/CIR/Dialect/Passes.h.inc"
+} // namespace mlir
+
+namespace {
+
+struct TargetLoweringPass
+    : public impl::TargetLoweringBase<TargetLoweringPass> {
+  TargetLoweringPass() = default;
+  void runOnOperation() override;
+
+private:
+  void runOnOp(cir::LoadOp op, cir::LowerModule &lowerModule);
+  void runOnOp(cir::StoreOp op, cir::LowerModule &lowerModule);
+};
+
+} // namespace
+
+void TargetLoweringPass::runOnOp(cir::LoadOp op,
+                                 cir::LowerModule &lowerModule) {
+  if (std::optional<cir::SyncScopeKind> syncScope = op.getSyncScope())
+    op.setSyncScope(
+        lowerModule.getTargetLoweringInfo().convertSyncScope(*syncScope));
+}
+
+void TargetLoweringPass::runOnOp(cir::StoreOp op,
+                                 cir::LowerModule &lowerModule) {
+  if (std::optional<cir::SyncScopeKind> syncScope = op.getSyncScope())
+    op.setSyncScope(
+        lowerModule.getTargetLoweringInfo().convertSyncScope(*syncScope));
+}
----------------
xlauko wrote:

These are 2 times the same function, should be template?
And maybe better named:
`convertSyncScopeIfPresent`?

https://github.com/llvm/llvm-project/pull/179245