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annotate lib/CodeGen/MachinePostDominators.cpp @ 100:7d135dc70f03 LLVM 3.9

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LLVM 3.9
author Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
date Tue, 26 Jan 2016 22:53:40 +0900
parents 95c75e76d11b
children 803732b1fca8
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1 //===- MachinePostDominators.cpp -Machine Post Dominator Calculation ------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file implements simple dominator construction algorithms for finding
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11 // post dominators on machine functions.
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12 //
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13 //===----------------------------------------------------------------------===//
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14
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15 #include "llvm/CodeGen/MachinePostDominators.h"
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16
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17 using namespace llvm;
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18
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19 char MachinePostDominatorTree::ID = 0;
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20
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21 //declare initializeMachinePostDominatorTreePass
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22 INITIALIZE_PASS(MachinePostDominatorTree, "machinepostdomtree",
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23 "MachinePostDominator Tree Construction", true, true)
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24
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25 MachinePostDominatorTree::MachinePostDominatorTree() : MachineFunctionPass(ID) {
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26 initializeMachinePostDominatorTreePass(*PassRegistry::getPassRegistry());
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27 DT = new DominatorTreeBase<MachineBasicBlock>(true); //true indicate
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28 // postdominator
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29 }
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30
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31 FunctionPass *
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32 MachinePostDominatorTree::createMachinePostDominatorTreePass() {
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33 return new MachinePostDominatorTree();
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34 }
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35
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36 bool
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37 MachinePostDominatorTree::runOnMachineFunction(MachineFunction &F) {
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38 DT->recalculate(F);
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39 return false;
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40 }
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41
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42 MachinePostDominatorTree::~MachinePostDominatorTree() {
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43 delete DT;
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44 }
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45
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46 void
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47 MachinePostDominatorTree::getAnalysisUsage(AnalysisUsage &AU) const {
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48 AU.setPreservesAll();
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49 MachineFunctionPass::getAnalysisUsage(AU);
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50 }
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51
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52 void
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53 MachinePostDominatorTree::print(llvm::raw_ostream &OS, const Module *M) const {
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54 DT->print(OS);
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55 }