1 //===- MachineDominanceFrontier.cpp ---------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "llvm/CodeGen/MachineDominanceFrontier.h" 10 #include "llvm/CodeGen/MachineDominators.h" 11 #include "llvm/CodeGen/Passes.h" 12 #include "llvm/InitializePasses.h" 13 #include "llvm/Pass.h" 14 #include "llvm/PassRegistry.h" 15 16 using namespace llvm; 17 18 namespace llvm { 19 template class DominanceFrontierBase<MachineBasicBlock, false>; 20 template class DominanceFrontierBase<MachineBasicBlock, true>; 21 template class ForwardDominanceFrontierBase<MachineBasicBlock>; 22 } 23 24 25 char MachineDominanceFrontier::ID = 0; 26 27 INITIALIZE_PASS_BEGIN(MachineDominanceFrontier, "machine-domfrontier", 28 "Machine Dominance Frontier Construction", true, true) 29 INITIALIZE_PASS_DEPENDENCY(MachineDominatorTree) 30 INITIALIZE_PASS_END(MachineDominanceFrontier, "machine-domfrontier", 31 "Machine Dominance Frontier Construction", true, true) 32 33 MachineDominanceFrontier::MachineDominanceFrontier() : MachineFunctionPass(ID) { 34 initializeMachineDominanceFrontierPass(*PassRegistry::getPassRegistry()); 35 } 36 37 char &llvm::MachineDominanceFrontierID = MachineDominanceFrontier::ID; 38 39 bool MachineDominanceFrontier::runOnMachineFunction(MachineFunction &) { 40 releaseMemory(); 41 Base.analyze(getAnalysis<MachineDominatorTree>().getBase()); 42 return false; 43 } 44 45 void MachineDominanceFrontier::releaseMemory() { 46 Base.releaseMemory(); 47 } 48 49 void MachineDominanceFrontier::getAnalysisUsage(AnalysisUsage &AU) const { 50 AU.setPreservesAll(); 51 AU.addRequired<MachineDominatorTree>(); 52 MachineFunctionPass::getAnalysisUsage(AU); 53 } 54