Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/lib/Analysis/DominanceFrontier.cpp

@@ -0,0 +1,96 @@
+//===- DominanceFrontier.cpp - Dominance Frontier Calculation -------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/DominanceFrontier.h"
+#include "llvm/Analysis/DominanceFrontierImpl.h"
+#include "llvm/IR/Dominators.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/PassManager.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+namespace llvm {
+
+template class DominanceFrontierBase<BasicBlock, false>;
+template class DominanceFrontierBase<BasicBlock, true>;
+template class ForwardDominanceFrontierBase<BasicBlock>;
+
+} // end namespace llvm
+
+char DominanceFrontierWrapperPass::ID = 0;
+
+INITIALIZE_PASS_BEGIN(DominanceFrontierWrapperPass, "domfrontier",
+                "Dominance Frontier Construction", true, true)
+INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
+INITIALIZE_PASS_END(DominanceFrontierWrapperPass, "domfrontier",
+                "Dominance Frontier Construction", true, true)
+
+DominanceFrontierWrapperPass::DominanceFrontierWrapperPass()
+    : FunctionPass(ID), DF() {
+  initializeDominanceFrontierWrapperPassPass(*PassRegistry::getPassRegistry());
+}
+
+void DominanceFrontierWrapperPass::releaseMemory() {
+  DF.releaseMemory();
+}
+
+bool DominanceFrontierWrapperPass::runOnFunction(Function &) {
+  releaseMemory();
+  DF.analyze(getAnalysis<DominatorTreeWrapperPass>().getDomTree());
+  return false;
+}
+
+void DominanceFrontierWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const {
+  AU.setPreservesAll();
+  AU.addRequired<DominatorTreeWrapperPass>();
+}
+
+void DominanceFrontierWrapperPass::print(raw_ostream &OS, const Module *) const {
+  DF.print(OS);
+}
+
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+LLVM_DUMP_METHOD void DominanceFrontierWrapperPass::dump() const {
+  print(dbgs());
+}
+#endif
+
+/// Handle invalidation explicitly.
+bool DominanceFrontier::invalidate(Function &F, const PreservedAnalyses &PA,
+                                   FunctionAnalysisManager::Invalidator &) {
+  // Check whether the analysis, all analyses on functions, or the function's
+  // CFG have been preserved.
+  auto PAC = PA.getChecker<DominanceFrontierAnalysis>();
+  return !(PAC.preserved() || PAC.preservedSet<AllAnalysesOn<Function>>() ||
+           PAC.preservedSet<CFGAnalyses>());
+}
+
+AnalysisKey DominanceFrontierAnalysis::Key;
+
+DominanceFrontier DominanceFrontierAnalysis::run(Function &F,
+                                                 FunctionAnalysisManager &AM) {
+  DominanceFrontier DF;
+  DF.analyze(AM.getResult<DominatorTreeAnalysis>(F));
+  return DF;
+}
+
+DominanceFrontierPrinterPass::DominanceFrontierPrinterPass(raw_ostream &OS)
+  : OS(OS) {}
+
+PreservedAnalyses
+DominanceFrontierPrinterPass::run(Function &F, FunctionAnalysisManager &AM) {
+  OS << "DominanceFrontier for function: " << F.getName() << "\n";
+  AM.getResult<DominanceFrontierAnalysis>(F).print(OS);
+
+  return PreservedAnalyses::all();
+}