1915fa15c3
This will be useful for testing the set of calls for different systems, and eventually the product of context specific modifiers applied. In the future we should also know the type signatures, and be able to emit the correct one.
39 lines
1.3 KiB
C++
39 lines
1.3 KiB
C++
//===- DeclareRuntimeLibcalls.cpp -----------------------------------------===//
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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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//
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// Insert declarations for all runtime library calls known for the target.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/Utils/DeclareRuntimeLibcalls.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/RuntimeLibcalls.h"
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using namespace llvm;
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PreservedAnalyses DeclareRuntimeLibcallsPass::run(Module &M,
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ModuleAnalysisManager &MAM) {
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RTLIB::RuntimeLibcallsInfo RTLCI(M.getTargetTriple());
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LLVMContext &Ctx = M.getContext();
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for (RTLIB::LibcallImpl Impl : RTLCI.getLibcallImpls()) {
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if (Impl == RTLIB::Unsupported)
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continue;
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// TODO: Declare with correct type, calling convention, and attributes.
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FunctionType *FuncTy =
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FunctionType::get(Type::getVoidTy(Ctx), {}, /*IsVarArgs=*/true);
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const char *FuncName = RTLCI.getLibcallImplName(Impl);
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M.getOrInsertFunction(FuncName, FuncTy);
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}
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return PreservedAnalyses::none();
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}
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