Imported Upstream version 5.18.0.182

Former-commit-id: f9d55cf82631bfd710c387739687e5845296aea1

external/llvm/lib/CodeGen/MachineRegionInfo.cpp

@@ -1,148 +0,0 @@
-//===- lib/Codegen/MachineRegionInfo.cpp ----------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/MachineRegionInfo.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/Analysis/RegionInfoImpl.h"
-#include "llvm/CodeGen/MachinePostDominators.h"
-#include "llvm/Pass.h"
-#include "llvm/Support/Compiler.h"
-#include "llvm/Support/Debug.h"
-
-#define DEBUG_TYPE "machine-region-info"
-
-using namespace llvm;
-
-STATISTIC(numMachineRegions,       "The # of machine regions");
-STATISTIC(numMachineSimpleRegions, "The # of simple machine regions");
-
-namespace llvm {
-
-template class RegionBase<RegionTraits<MachineFunction>>;
-template class RegionNodeBase<RegionTraits<MachineFunction>>;
-template class RegionInfoBase<RegionTraits<MachineFunction>>;
-
-} // end namespace llvm
-
-//===----------------------------------------------------------------------===//
-// MachineRegion implementation
-
-MachineRegion::MachineRegion(MachineBasicBlock *Entry, MachineBasicBlock *Exit,
-                             MachineRegionInfo* RI,
-                             MachineDominatorTree *DT, MachineRegion *Parent) :
-  RegionBase<RegionTraits<MachineFunction>>(Entry, Exit, RI, DT, Parent) {}
-
-MachineRegion::~MachineRegion() = default;
-
-//===----------------------------------------------------------------------===//
-// MachineRegionInfo implementation
-
-MachineRegionInfo::MachineRegionInfo() = default;
-
-MachineRegionInfo::~MachineRegionInfo() = default;
-
-void MachineRegionInfo::updateStatistics(MachineRegion *R) {
-  ++numMachineRegions;
-
-  // TODO: Slow. Should only be enabled if -stats is used.
-  if (R->isSimple())
-    ++numMachineSimpleRegions;
-}
-
-void MachineRegionInfo::recalculate(MachineFunction &F,
-                                    MachineDominatorTree *DT_,
-                                    MachinePostDominatorTree *PDT_,
-                                    MachineDominanceFrontier *DF_) {
-  DT = DT_;
-  PDT = PDT_;
-  DF = DF_;
-
-  MachineBasicBlock *Entry = GraphTraits<MachineFunction*>::getEntryNode(&F);
-
-  TopLevelRegion = new MachineRegion(Entry, nullptr, this, DT, nullptr);
-  updateStatistics(TopLevelRegion);
-  calculate(F);
-}
-
-//===----------------------------------------------------------------------===//
-// MachineRegionInfoPass implementation
-//
-
-MachineRegionInfoPass::MachineRegionInfoPass() : MachineFunctionPass(ID) {
-  initializeMachineRegionInfoPassPass(*PassRegistry::getPassRegistry());
-}
-
-MachineRegionInfoPass::~MachineRegionInfoPass() = default;
-
-bool MachineRegionInfoPass::runOnMachineFunction(MachineFunction &F) {
-  releaseMemory();
-
-  auto DT = &getAnalysis<MachineDominatorTree>();
-  auto PDT = &getAnalysis<MachinePostDominatorTree>();
-  auto DF = &getAnalysis<MachineDominanceFrontier>();
-
-  RI.recalculate(F, DT, PDT, DF);
-
-  DEBUG(RI.dump());
-
-  return false;
-}
-
-void MachineRegionInfoPass::releaseMemory() {
-  RI.releaseMemory();
-}
-
-void MachineRegionInfoPass::verifyAnalysis() const {
-  // Only do verification when user wants to, otherwise this expensive check
-  // will be invoked by PMDataManager::verifyPreservedAnalysis when
-  // a regionpass (marked PreservedAll) finish.
-  if (MachineRegionInfo::VerifyRegionInfo)
-    RI.verifyAnalysis();
-}
-
-void MachineRegionInfoPass::getAnalysisUsage(AnalysisUsage &AU) const {
-  AU.setPreservesAll();
-  AU.addRequired<MachineDominatorTree>();
-  AU.addRequired<MachinePostDominatorTree>();
-  AU.addRequired<MachineDominanceFrontier>();
-  MachineFunctionPass::getAnalysisUsage(AU);
-}
-
-void MachineRegionInfoPass::print(raw_ostream &OS, const Module *) const {
-  RI.print(OS);
-}
-
-#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
-LLVM_DUMP_METHOD void MachineRegionInfoPass::dump() const {
-  RI.dump();
-}
-#endif
-
-char MachineRegionInfoPass::ID = 0;
-char &MachineRegionInfoPassID = MachineRegionInfoPass::ID;
-
-INITIALIZE_PASS_BEGIN(MachineRegionInfoPass, DEBUG_TYPE,
-                      "Detect single entry single exit regions", true, true)
-INITIALIZE_PASS_DEPENDENCY(MachineDominatorTree)
-INITIALIZE_PASS_DEPENDENCY(MachinePostDominatorTree)
-INITIALIZE_PASS_DEPENDENCY(MachineDominanceFrontier)
-INITIALIZE_PASS_END(MachineRegionInfoPass, DEBUG_TYPE,
-                    "Detect single entry single exit regions", true, true)
-
-// Create methods available outside of this file, to use them
-// "include/llvm/LinkAllPasses.h". Otherwise the pass would be deleted by
-// the link time optimization.
-
-namespace llvm {
-
-FunctionPass *createMachineRegionInfoPass() {
-  return new MachineRegionInfoPass();
-}
-
-} // end namespace llvm