54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
//===- MachineDominators.cpp - Machine Dominator 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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//
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// This file implements simple dominator construction algorithms for finding
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// forward dominators on machine functions.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/MachineDominators.h"
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#include "llvm/CodeGen/Passes.h"
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using namespace llvm;
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TEMPLATE_INSTANTIATION(class DomTreeNodeBase<MachineBasicBlock>);
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TEMPLATE_INSTANTIATION(class DominatorTreeBase<MachineBasicBlock>);
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char MachineDominatorTree::ID = 0;
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static RegisterPass<MachineDominatorTree>
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E("machinedomtree", "MachineDominator Tree Construction", true);
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const PassInfo *const llvm::MachineDominatorsID = &E;
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void MachineDominatorTree::getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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MachineFunctionPass::getAnalysisUsage(AU);
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}
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bool MachineDominatorTree::runOnMachineFunction(MachineFunction &F) {
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DT->recalculate(F);
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return false;
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}
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MachineDominatorTree::MachineDominatorTree()
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: MachineFunctionPass(&ID) {
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DT = new DominatorTreeBase<MachineBasicBlock>(false);
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}
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MachineDominatorTree::~MachineDominatorTree() {
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DT->releaseMemory();
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delete DT;
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}
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void MachineDominatorTree::releaseMemory() {
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DT->releaseMemory();
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}
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