1 //===- MachineDominanceFrontier.cpp ---------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/CodeGen/MachineDominanceFrontier.h" 11 #include "llvm/Analysis/DominanceFrontierImpl.h" 12 #include "llvm/CodeGen/MachineDominators.h" 13 #include "llvm/CodeGen/Passes.h" 14 15 16 using namespace llvm; 17 18 namespace llvm { 19 template class DominanceFrontierBase<MachineBasicBlock>; 20 template class ForwardDominanceFrontierBase<MachineBasicBlock>; 21 } 22 23 24 char MachineDominanceFrontier::ID = 0; 25 26 INITIALIZE_PASS_BEGIN(MachineDominanceFrontier, "machine-domfrontier", 27 "Machine Dominance Frontier Construction", true, true) INITIALIZE_PASS_DEPENDENCY(MachineDominatorTree)28 INITIALIZE_PASS_DEPENDENCY(MachineDominatorTree) 29 INITIALIZE_PASS_END(MachineDominanceFrontier, "machine-domfrontier", 30 "Machine Dominance Frontier Construction", true, true) 31 32 MachineDominanceFrontier::MachineDominanceFrontier() 33 : MachineFunctionPass(ID), 34 Base() { 35 initializeMachineDominanceFrontierPass(*PassRegistry::getPassRegistry()); 36 } 37 38 char &llvm::MachineDominanceFrontierID = MachineDominanceFrontier::ID; 39 runOnMachineFunction(MachineFunction &)40 bool MachineDominanceFrontier::runOnMachineFunction(MachineFunction &) { 41 releaseMemory(); 42 Base.analyze(getAnalysis<MachineDominatorTree>().getBase()); 43 return false; 44 } 45 releaseMemory()46 void MachineDominanceFrontier::releaseMemory() { 47 Base.releaseMemory(); 48 } 49 getAnalysisUsage(AnalysisUsage & AU) const50 void MachineDominanceFrontier::getAnalysisUsage(AnalysisUsage &AU) const { 51 AU.setPreservesAll(); 52 AU.addRequired<MachineDominatorTree>(); 53 MachineFunctionPass::getAnalysisUsage(AU); 54 } 55