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//===- LibcallLoweringInfo.cpp - Interface for runtime libcalls -----------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/LibcallLoweringInfo.h"
#include "llvm/Analysis/RuntimeLibcallInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/InitializePasses.h"
#include "llvm/Target/TargetMachine.h"
using namespace llvm;
LibcallLoweringInfo::LibcallLoweringInfo(
const RTLIB::RuntimeLibcallsInfo &RTLCI,
const TargetSubtargetInfo &Subtarget)
: RTLCI(RTLCI) {
// TODO: This should be generated with lowering predicates, and assert the
// call is available.
for (RTLIB::LibcallImpl Impl : RTLIB::libcall_impls()) {
if (RTLCI.isAvailable(Impl)) {
RTLIB::Libcall LC = RTLIB::RuntimeLibcallsInfo::getLibcallFromImpl(Impl);
// FIXME: Hack, assume the first available libcall wins.
if (LibcallImpls[LC] == RTLIB::Unsupported)
LibcallImpls[LC] = Impl;
}
}
Subtarget.initLibcallLoweringInfo(*this);
}
AnalysisKey LibcallLoweringModuleAnalysis::Key;
bool LibcallLoweringModuleAnalysisResult::invalidate(
Module &, const PreservedAnalyses &PA,
ModuleAnalysisManager::Invalidator &) {
// Passes that change the runtime libcall set must explicitly invalidate this
// pass.
auto PAC = PA.getChecker<LibcallLoweringModuleAnalysis>();
return !PAC.preservedWhenStateless();
}
LibcallLoweringModuleAnalysisResult
LibcallLoweringModuleAnalysis::run(Module &M, ModuleAnalysisManager &MAM) {
LibcallLoweringMap.init(&MAM.getResult<RuntimeLibraryAnalysis>(M));
return LibcallLoweringMap;
}
INITIALIZE_PASS_BEGIN(LibcallLoweringInfoWrapper, "libcall-lowering-info",
"Library Function Lowering Analysis", false, true)
INITIALIZE_PASS_DEPENDENCY(RuntimeLibraryInfoWrapper)
INITIALIZE_PASS_END(LibcallLoweringInfoWrapper, "libcall-lowering-info",
"Library Function Lowering Analysis", false, true)
char LibcallLoweringInfoWrapper::ID = 0;
LibcallLoweringInfoWrapper::LibcallLoweringInfoWrapper() : ImmutablePass(ID) {}
void LibcallLoweringInfoWrapper::initializePass() {
RuntimeLibcallsWrapper = &getAnalysis<RuntimeLibraryInfoWrapper>();
}
void LibcallLoweringInfoWrapper::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<RuntimeLibraryInfoWrapper>();
AU.setPreservesAll();
}
void LibcallLoweringInfoWrapper::releaseMemory() { Result.clear(); }
ModulePass *llvm::createLibcallLoweringInfoWrapper() {
return new LibcallLoweringInfoWrapper();
}
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