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//===- MachinePostDominators.cpp -Machine Post Dominator Calculation ------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements simple dominator construction algorithms for finding
// post dominators on machine functions.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachinePostDominators.h"
using namespace llvm;
namespace llvm {
template class DominatorTreeBase<MachineBasicBlock, true>; // PostDomTreeBase
}
char MachinePostDominatorTree::ID = 0;
//declare initializeMachinePostDominatorTreePass
INITIALIZE_PASS(MachinePostDominatorTree, "machinepostdomtree",
"MachinePostDominator Tree Construction", true, true)
MachinePostDominatorTree::MachinePostDominatorTree() : MachineFunctionPass(ID) {
initializeMachinePostDominatorTreePass(*PassRegistry::getPassRegistry());
DT = new PostDomTreeBase<MachineBasicBlock>();
}
FunctionPass *
MachinePostDominatorTree::createMachinePostDominatorTreePass() {
return new MachinePostDominatorTree();
}
bool
MachinePostDominatorTree::runOnMachineFunction(MachineFunction &F) {
DT->recalculate(F);
return false;
}
MachinePostDominatorTree::~MachinePostDominatorTree() {
delete DT;
}
void
MachinePostDominatorTree::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
MachineFunctionPass::getAnalysisUsage(AU);
}
void
MachinePostDominatorTree::print(llvm::raw_ostream &OS, const Module *M) const {
DT->print(OS);
}
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