04785adec3
This PR introduces `ABIFunctionInfo` and surrounding utility helpers, and is part of the set of breakout PRs to upstream the LLVM ABI lowering library prototyped in https://github.com/llvm/llvm-project/pull/140112. `ABIFunctionInfo` is directly analogous to `CGFunctionInfo` from Clang's existing CodeGen pipeline, and represents an ABI lowered view of the function signature, decoupled from both the Clang AST and LLVM IR. `ABIArgInfo` encodes lowering decisions and currently supports Direct,Extend,Indirect and Ignore which are required for our initial goal of implementing x86-64 SysV and BPF, but this will change as the library grows to represent more targets that need them. This PR is a direct precursor to the implementation of `ABIInfo` in the library as demonstrated in the PR linked above..
32 lines
1.1 KiB
C++
32 lines
1.1 KiB
C++
//===----- FunctionInfo.cpp - ABI Function Information ----------- C++ ----===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ABI/FunctionInfo.h"
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#include <optional>
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using namespace llvm;
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using namespace llvm::abi;
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FunctionInfo *FunctionInfo::create(CallingConv::ID CC, const Type *ReturnType,
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ArrayRef<const Type *> ArgTypes,
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std::optional<unsigned> NumRequired) {
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assert(!NumRequired || *NumRequired <= ArgTypes.size());
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void *Buffer = operator new(totalSizeToAlloc<ArgEntry>(ArgTypes.size()));
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FunctionInfo *FI =
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new (Buffer) FunctionInfo(CC, ReturnType, ArgTypes.size(), NumRequired);
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ArgEntry *Args = FI->getTrailingObjects();
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for (unsigned I = 0; I < ArgTypes.size(); ++I)
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new (&Args[I]) ArgEntry(ArgTypes[I]);
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return FI;
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}
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