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aa78fc4f6e
Summary: DominatorTreeBase used to have IsPostDominators (bool) member to indicate if the tree is a dominator or a postdominator tree. This made it possible to switch between the two 'modes' at runtime, but it isn't used in practice anywhere. This patch makes IsPostDominator a template argument. This way, it is easier to switch between different algorithms at compile-time based on this argument and design external utilities around it. It also makes it impossible to incidentally assign a postdominator tree to a dominator tree (and vice versa), and to further simplify template code in GenericDominatorTreeConstruction. Reviewers: dberlin, sanjoy, davide, grosser Reviewed By: dberlin Subscribers: mzolotukhin, llvm-commits Differential Revision: https://reviews.llvm.org/D35315 llvm-svn: 308040
55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
//===- MachineDominanceFrontier.cpp ---------------------------------------===//
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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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#include "llvm/CodeGen/MachineDominanceFrontier.h"
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#include "llvm/Analysis/DominanceFrontierImpl.h"
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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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namespace llvm {
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template class DominanceFrontierBase<MachineBasicBlock, false>;
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template class DominanceFrontierBase<MachineBasicBlock, true>;
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template class ForwardDominanceFrontierBase<MachineBasicBlock>;
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}
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char MachineDominanceFrontier::ID = 0;
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INITIALIZE_PASS_BEGIN(MachineDominanceFrontier, "machine-domfrontier",
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"Machine Dominance Frontier Construction", true, true)
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INITIALIZE_PASS_DEPENDENCY(MachineDominatorTree)
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INITIALIZE_PASS_END(MachineDominanceFrontier, "machine-domfrontier",
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"Machine Dominance Frontier Construction", true, true)
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MachineDominanceFrontier::MachineDominanceFrontier()
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: MachineFunctionPass(ID),
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Base() {
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initializeMachineDominanceFrontierPass(*PassRegistry::getPassRegistry());
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}
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char &llvm::MachineDominanceFrontierID = MachineDominanceFrontier::ID;
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bool MachineDominanceFrontier::runOnMachineFunction(MachineFunction &) {
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releaseMemory();
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Base.analyze(getAnalysis<MachineDominatorTree>().getBase());
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return false;
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}
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void MachineDominanceFrontier::releaseMemory() {
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Base.releaseMemory();
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}
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void MachineDominanceFrontier::getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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AU.addRequired<MachineDominatorTree>();
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MachineFunctionPass::getAnalysisUsage(AU);
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}
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