[clang] [llvm] [WIP] ABI Lowering Library (PR #140112)

[Nikita Popov via llvm-commits]

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@@ -0,0 +1,76 @@
+//===---- ABITypeMapper.h - Maps LLVM ABI Types to LLVM IR Types --------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// Maps LLVM ABI type representations back to corresponding LLVM IR types.
+/// This reverse mapper translates low-level ABI-specific types back into
+/// LLVM IR types suitable for code generation and optimization passes.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_ABITYPEMAPPER_H
+#define LLVM_CODEGEN_ABITYPEMAPPER_H
+
+#include "llvm/ABI/Types.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Type.h"
+#include "llvm/Support/TypeSize.h"
+
+namespace llvm {
+
+class ABITypeMapper {
+public:
+  explicit ABITypeMapper(LLVMContext &Ctx, const DataLayout &DataLayout)
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nikic wrote:

Just as a general note, in C++ ctors it's okay to use the same name for the ctor arg and the member. So something like `DL(DL)` works and is idiomatic.

https://github.com/llvm/llvm-project/pull/140112