539412914a
This is mostly boilerplate to move various freestanding utility functions into LegalizerHelper. LibcallLoweringInfo is currently optional, mostly because threading it through assorted other uses of LegalizerHelper is more difficult. I had a lot of trouble getting this to work in the legacy pass manager with setRequiresCodeGenSCCOrder, and am not happy with the result. A sub-pass manager is introduced and this is invalidated, so we're re-computing this unnecessarily.
76 lines
2.7 KiB
C++
76 lines
2.7 KiB
C++
//===- 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();
|
|
}
|