3052290dc0
This version of the patch fixes cleaning up ssa_copy intrinsics, so it does not crash for instructions in blocks that have been marked unreachable. This patch updates IPSCCP to use PredicateInfo to propagate facts to true branches predicated by EQ and to false branches predicated by NE. As a follow up, we should be able to extend it to also propagate additional facts about nonnull. Reviewers: davide, mssimpso, dberlin, efriedma Reviewed By: davide, dberlin Differential Revision: https://reviews.llvm.org/D45330 llvm-svn: 340525
79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
#include "llvm/Transforms/IPO/SCCP.h"
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#include "llvm/Analysis/AssumptionCache.h"
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#include "llvm/Analysis/TargetLibraryInfo.h"
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#include "llvm/Transforms/IPO.h"
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#include "llvm/Transforms/Scalar/SCCP.h"
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using namespace llvm;
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PreservedAnalyses IPSCCPPass::run(Module &M, ModuleAnalysisManager &AM) {
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const DataLayout &DL = M.getDataLayout();
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auto &TLI = AM.getResult<TargetLibraryAnalysis>(M);
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auto &FAM = AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
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auto getPredicateInfo =
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[&FAM](Function &F) -> std::unique_ptr<PredicateInfo> {
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return make_unique<PredicateInfo>(F,
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FAM.getResult<DominatorTreeAnalysis>(F),
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FAM.getResult<AssumptionAnalysis>(F));
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};
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if (!runIPSCCP(M, DL, &TLI, getPredicateInfo))
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return PreservedAnalyses::all();
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return PreservedAnalyses::none();
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}
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namespace {
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//===--------------------------------------------------------------------===//
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//
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/// IPSCCP Class - This class implements interprocedural Sparse Conditional
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/// Constant Propagation.
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///
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class IPSCCPLegacyPass : public ModulePass {
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public:
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static char ID;
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IPSCCPLegacyPass() : ModulePass(ID) {
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initializeIPSCCPLegacyPassPass(*PassRegistry::getPassRegistry());
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}
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bool runOnModule(Module &M) override {
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if (skipModule(M))
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return false;
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const DataLayout &DL = M.getDataLayout();
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const TargetLibraryInfo *TLI =
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&getAnalysis<TargetLibraryInfoWrapperPass>().getTLI();
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auto getPredicateInfo =
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[this](Function &F) -> std::unique_ptr<PredicateInfo> {
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return make_unique<PredicateInfo>(
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F, this->getAnalysis<DominatorTreeWrapperPass>(F).getDomTree(),
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this->getAnalysis<AssumptionCacheTracker>().getAssumptionCache(F));
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};
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return runIPSCCP(M, DL, TLI, getPredicateInfo);
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.addRequired<AssumptionCacheTracker>();
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AU.addRequired<DominatorTreeWrapperPass>();
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AU.addRequired<TargetLibraryInfoWrapperPass>();
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}
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};
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} // end anonymous namespace
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char IPSCCPLegacyPass::ID = 0;
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INITIALIZE_PASS_BEGIN(IPSCCPLegacyPass, "ipsccp",
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"Interprocedural Sparse Conditional Constant Propagation",
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false, false)
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INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
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INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
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INITIALIZE_PASS_END(IPSCCPLegacyPass, "ipsccp",
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"Interprocedural Sparse Conditional Constant Propagation",
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false, false)
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// createIPSCCPPass - This is the public interface to this file.
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ModulePass *llvm::createIPSCCPPass() { return new IPSCCPLegacyPass(); }
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