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//===- DeclareRuntimeLibcalls.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
//
//===----------------------------------------------------------------------===//
//
// Insert declarations for all runtime library calls known for the target.
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Utils/DeclareRuntimeLibcalls.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/RuntimeLibcalls.h"
using namespace llvm;
PreservedAnalyses DeclareRuntimeLibcallsPass::run(Module &M,
ModuleAnalysisManager &MAM) {
RTLIB::RuntimeLibcallsInfo RTLCI(M.getTargetTriple());
LLVMContext &Ctx = M.getContext();
for (RTLIB::LibcallImpl Impl : RTLCI.getLibcallImpls()) {
if (Impl == RTLIB::Unsupported)
continue;
// TODO: Declare with correct type, calling convention, and attributes.
FunctionType *FuncTy =
FunctionType::get(Type::getVoidTy(Ctx), {}, /*IsVarArgs=*/true);
const char *FuncName = RTLCI.getLibcallImplName(Impl);
M.getOrInsertFunction(FuncName, FuncTy);
}
return PreservedAnalyses::none();
}
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