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//===-- SCCP.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
//
//===----------------------------------------------------------------------===//
//
// This file implements Interprocedural Sparse Conditional Constant Propagation.
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/IPO/SCCP.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/PostDominators.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/InitializePasses.h"
#include "llvm/Transforms/IPO.h"
#include "llvm/Transforms/Scalar/SCCP.h"
#include "llvm/Transforms/Utils/SCCPSolver.h"
using namespace llvm;
PreservedAnalyses IPSCCPPass::run(Module &M, ModuleAnalysisManager &AM) {
const DataLayout &DL = M.getDataLayout();
auto &FAM = AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
auto GetTLI = [&FAM](Function &F) -> const TargetLibraryInfo & {
return FAM.getResult<TargetLibraryAnalysis>(F);
};
auto getAnalysis = [&FAM](Function &F) -> AnalysisResultsForFn {
DominatorTree &DT = FAM.getResult<DominatorTreeAnalysis>(F);
return {
std::make_unique<PredicateInfo>(F, DT, FAM.getResult<AssumptionAnalysis>(F)),
&DT, FAM.getCachedResult<PostDominatorTreeAnalysis>(F)};
};
if (!runIPSCCP(M, DL, GetTLI, getAnalysis))
return PreservedAnalyses::all();
PreservedAnalyses PA;
PA.preserve<DominatorTreeAnalysis>();
PA.preserve<PostDominatorTreeAnalysis>();
PA.preserve<FunctionAnalysisManagerModuleProxy>();
return PA;
}
namespace {
//===--------------------------------------------------------------------===//
//
/// IPSCCP Class - This class implements interprocedural Sparse Conditional
/// Constant Propagation.
///
class IPSCCPLegacyPass : public ModulePass {
public:
static char ID;
IPSCCPLegacyPass() : ModulePass(ID) {
initializeIPSCCPLegacyPassPass(*PassRegistry::getPassRegistry());
}
bool runOnModule(Module &M) override {
if (skipModule(M))
return false;
const DataLayout &DL = M.getDataLayout();
auto GetTLI = [this](Function &F) -> const TargetLibraryInfo & {
return this->getAnalysis<TargetLibraryInfoWrapperPass>().getTLI(F);
};
auto getAnalysis = [this](Function &F) -> AnalysisResultsForFn {
DominatorTree &DT =
this->getAnalysis<DominatorTreeWrapperPass>(F).getDomTree();
return {
std::make_unique<PredicateInfo>(
F, DT,
this->getAnalysis<AssumptionCacheTracker>().getAssumptionCache(
F)),
nullptr, // We cannot preserve the DT or PDT with the legacy pass
nullptr}; // manager, so set them to nullptr.
};
return runIPSCCP(M, DL, GetTLI, getAnalysis);
}
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.addRequired<AssumptionCacheTracker>();
AU.addRequired<DominatorTreeWrapperPass>();
AU.addRequired<TargetLibraryInfoWrapperPass>();
}
};
} // end anonymous namespace
char IPSCCPLegacyPass::ID = 0;
INITIALIZE_PASS_BEGIN(IPSCCPLegacyPass, "ipsccp",
"Interprocedural Sparse Conditional Constant Propagation",
false, false)
INITIALIZE_PASS_DEPENDENCY(AssumptionCacheTracker)
INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
INITIALIZE_PASS_END(IPSCCPLegacyPass, "ipsccp",
"Interprocedural Sparse Conditional Constant Propagation",
false, false)
// createIPSCCPPass - This is the public interface to this file.
ModulePass *llvm::createIPSCCPPass() { return new IPSCCPLegacyPass(); }
PreservedAnalyses FunctionSpecializationPass::run(Module &M,
ModuleAnalysisManager &AM) {
const DataLayout &DL = M.getDataLayout();
auto &FAM = AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
auto GetTLI = [&FAM](Function &F) -> TargetLibraryInfo & {
return FAM.getResult<TargetLibraryAnalysis>(F);
};
auto GetTTI = [&FAM](Function &F) -> TargetTransformInfo & {
return FAM.getResult<TargetIRAnalysis>(F);
};
auto GetAC = [&FAM](Function &F) -> AssumptionCache & {
return FAM.getResult<AssumptionAnalysis>(F);
};
auto GetAnalysis = [&FAM](Function &F) -> AnalysisResultsForFn {
DominatorTree &DT = FAM.getResult<DominatorTreeAnalysis>(F);
return {std::make_unique<PredicateInfo>(
F, DT, FAM.getResult<AssumptionAnalysis>(F)),
&DT, FAM.getCachedResult<PostDominatorTreeAnalysis>(F)};
};
if (!runFunctionSpecialization(M, DL, GetTLI, GetTTI, GetAC, GetAnalysis))
return PreservedAnalyses::all();
PreservedAnalyses PA;
PA.preserve<DominatorTreeAnalysis>();
PA.preserve<PostDominatorTreeAnalysis>();
PA.preserve<FunctionAnalysisManagerModuleProxy>();
return PA;
}
namespace {
struct FunctionSpecializationLegacyPass : public ModulePass {
static char ID; // Pass identification, replacement for typeid
FunctionSpecializationLegacyPass() : ModulePass(ID) {}
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.addRequired<AssumptionCacheTracker>();
AU.addRequired<DominatorTreeWrapperPass>();
AU.addRequired<TargetLibraryInfoWrapperPass>();
AU.addRequired<TargetTransformInfoWrapperPass>();
}
bool runOnModule(Module &M) override {
if (skipModule(M))
return false;
const DataLayout &DL = M.getDataLayout();
auto GetTLI = [this](Function &F) -> TargetLibraryInfo & {
return this->getAnalysis<TargetLibraryInfoWrapperPass>().getTLI(F);
};
auto GetTTI = [this](Function &F) -> TargetTransformInfo & {
return this->getAnalysis<TargetTransformInfoWrapperPass>().getTTI(F);
};
auto GetAC = [this](Function &F) -> AssumptionCache & {
return this->getAnalysis<AssumptionCacheTracker>().getAssumptionCache(F);
};
auto GetAnalysis = [this](Function &F) -> AnalysisResultsForFn {
DominatorTree &DT =
this->getAnalysis<DominatorTreeWrapperPass>(F).getDomTree();
return {
std::make_unique<PredicateInfo>(
F, DT,
this->getAnalysis<AssumptionCacheTracker>().getAssumptionCache(
F)),
nullptr, // We cannot preserve the DT or PDT with the legacy pass
nullptr}; // manager, so set them to nullptr.
};
return runFunctionSpecialization(M, DL, GetTLI, GetTTI, GetAC, GetAnalysis);
}
};
} // namespace
char FunctionSpecializationLegacyPass::ID = 0;
INITIALIZE_PASS_BEGIN(
FunctionSpecializationLegacyPass, "function-specialization",
"Propagate constant arguments by specializing the function", false, false)
INITIALIZE_PASS_DEPENDENCY(AssumptionCacheTracker)
INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
INITIALIZE_PASS_DEPENDENCY(TargetTransformInfoWrapperPass)
INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
INITIALIZE_PASS_END(FunctionSpecializationLegacyPass, "function-specialization",
"Propagate constant arguments by specializing the function",
false, false)
ModulePass *llvm::createFunctionSpecializationPass() {
return new FunctionSpecializationLegacyPass();
}
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