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 #include "llvm/Analysis/PostDominators.h"
  15 #include "llvm/ADT/DepthFirstIterator.h"
  16 #include "llvm/ADT/SetOperations.h"
  17 #include "llvm/IR/CFG.h"
  18 #include "llvm/IR/Instructions.h"
  19 #include "llvm/Support/Debug.h"
  20 #include "llvm/Support/GenericDomTreeConstruction.h"
  21 using namespace llvm;
  22
  23 #define DEBUG_TYPE "postdomtree"
  24
  25 //===----------------------------------------------------------------------===//
  26 //  PostDominatorTree Implementation
  27 //===----------------------------------------------------------------------===//
  28
  29 char PostDominatorTree::ID = 0;
  30 INITIALIZE_PASS(PostDominatorTree, "postdomtree",
  31                 "Post-Dominator Tree Construction", true, true)
  32
  33 bool PostDominatorTree::runOnFunction(Function &F) {
  34   DT->recalculate(F);
  35   return false;
  36 }
  37
  38 PostDominatorTree::~PostDominatorTree() {
  39   delete DT;
  40 }
  41
  42 void PostDominatorTree::print(raw_ostream &OS, const Module *) const {
  43   DT->print(OS);
  44 }
  45
  46
  47 FunctionPass* llvm::createPostDomTree() {
  48   return new PostDominatorTree();
  49 }
  50