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6150530377
This was originally a pointer to support pass managers which didn't use AnalysisManagers. However, that doesn't realistically come up much and the complexity of supporting it doesn't really make sense. In fact, *many* parts of the pass manager were just assuming the pointer was never null already. This at least makes it much more explicit and clear. llvm-svn: 263219
78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
//===- DominanceFrontier.cpp - Dominance Frontier Calculation -------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/DominanceFrontier.h"
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#include "llvm/Analysis/DominanceFrontierImpl.h"
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#include "llvm/IR/PassManager.h"
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using namespace llvm;
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namespace llvm {
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template class DominanceFrontierBase<BasicBlock>;
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template class ForwardDominanceFrontierBase<BasicBlock>;
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}
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char DominanceFrontierWrapperPass::ID = 0;
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INITIALIZE_PASS_BEGIN(DominanceFrontierWrapperPass, "domfrontier",
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"Dominance Frontier Construction", true, true)
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INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
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INITIALIZE_PASS_END(DominanceFrontierWrapperPass, "domfrontier",
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"Dominance Frontier Construction", true, true)
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DominanceFrontierWrapperPass::DominanceFrontierWrapperPass()
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: FunctionPass(ID), DF() {
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initializeDominanceFrontierWrapperPassPass(*PassRegistry::getPassRegistry());
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}
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void DominanceFrontierWrapperPass::releaseMemory() {
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DF.releaseMemory();
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}
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bool DominanceFrontierWrapperPass::runOnFunction(Function &) {
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releaseMemory();
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DF.analyze(getAnalysis<DominatorTreeWrapperPass>().getDomTree());
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return false;
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}
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void DominanceFrontierWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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AU.addRequired<DominatorTreeWrapperPass>();
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}
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void DominanceFrontierWrapperPass::print(raw_ostream &OS, const Module *) const {
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DF.print(OS);
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}
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#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
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LLVM_DUMP_METHOD void DominanceFrontierWrapperPass::dump() const {
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print(dbgs());
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}
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#endif
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char DominanceFrontierAnalysis::PassID;
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DominanceFrontier DominanceFrontierAnalysis::run(Function &F,
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FunctionAnalysisManager &AM) {
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DominanceFrontier DF;
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DF.analyze(AM.getResult<DominatorTreeAnalysis>(F));
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return DF;
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}
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DominanceFrontierPrinterPass::DominanceFrontierPrinterPass(raw_ostream &OS)
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: OS(OS) {}
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PreservedAnalyses
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DominanceFrontierPrinterPass::run(Function &F, FunctionAnalysisManager &AM) {
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OS << "DominanceFrontier for function: " << F.getName() << "\n";
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AM.getResult<DominanceFrontierAnalysis>(F).print(OS);
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return PreservedAnalyses::all();
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}
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