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

[Andy Kaylor via cfe-commits]

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@@ -3339,7 +3315,8 @@ void ConvertCIRToLLVMPass::runOnOperation() {
   mlir::ModuleOp module = getOperation();
   mlir::DataLayout dl(module);
   mlir::LLVMTypeConverter converter(&getContext());
-  std::unique_ptr<cir::LowerModule> lowerModule = prepareLowerModule(module);
+  std::unique_ptr<cir::LowerModule> lowerModule =
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andykaylor wrote:

Do we still need this here?

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