lib/Analysis/PostDominators.cpp

   1 //===- PostDominators.cpp - Post-Dominator Calculation --------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements the post-dominator construction algorithms.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #define DEBUG_TYPE "postdomtree"
  15
  16 #include "llvm/Analysis/PostDominators.h"
  17 #include "llvm/ADT/DepthFirstIterator.h"
  18 #include "llvm/ADT/SetOperations.h"
  19 #include "llvm/Analysis/DominatorInternals.h"
  20 #include "llvm/Assembly/Writer.h"
  21 #include "llvm/IR/Instructions.h"
  22 #include "llvm/Support/CFG.h"
  23 #include "llvm/Support/Debug.h"
  24 using namespace llvm;
  25
  26 //===----------------------------------------------------------------------===//
  27 //  PostDominatorTree Implementation
  28 //===----------------------------------------------------------------------===//
  29
  30 char PostDominatorTree::ID = 0;
  31 INITIALIZE_PASS(PostDominatorTree, "postdomtree",
  32                 "Post-Dominator Tree Construction", true, true)
  33
  34 bool PostDominatorTree::runOnFunction(Function &F) {
  35   DT->recalculate(F);
  36   return false;
  37 }
  38
  39 PostDominatorTree::~PostDominatorTree() {
  40   delete DT;
  41 }
  42
  43 void PostDominatorTree::print(raw_ostream &OS, const Module *) const {
  44   DT->print(OS);
  45 }
  46
  47
  48 FunctionPass* llvm::createPostDomTree() {
  49   return new PostDominatorTree();
  50 }
  51