1 //=- llvm/Analysis/PostDominators.h - Post Dominator Calculation-*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file exposes interfaces to post dominance information.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_ANALYSIS_POST_DOMINATORS_H
15 #define LLVM_ANALYSIS_POST_DOMINATORS_H
17 #include "llvm/Analysis/Dominators.h"
21 /// PostDominatorTree Class - Concrete subclass of DominatorTree that is used to
22 /// compute the a post-dominator tree.
24 struct PostDominatorTree : public DominatorTreeBase<BasicBlock> {
25 static char ID; // Pass identification, replacement for typeid
28 DominatorTreeBase<BasicBlock>((intptr_t)&ID, true) {}
30 virtual bool runOnFunction(Function &F);
32 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
38 /// PostDominanceFrontier Class - Concrete subclass of DominanceFrontier that is
39 /// used to compute the a post-dominance frontier.
41 struct PostDominanceFrontier : public DominanceFrontierBase {
43 PostDominanceFrontier()
44 : DominanceFrontierBase((intptr_t) &ID, true) {}
46 virtual bool runOnFunction(Function &) {
48 PostDominatorTree &DT = getAnalysis<PostDominatorTree>();
49 Roots = DT.getRoots();
50 if (const DomTreeNode *Root = DT.getRootNode())
55 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
57 AU.addRequired<PostDominatorTree>();
61 const DomSetType &calculate(const PostDominatorTree &DT,
62 const DomTreeNode *Node);
65 } // End llvm namespace
67 // Make sure that any clients of this file link in PostDominators.cpp
68 FORCE_DEFINING_FILE_TO_BE_LINKED(PostDominanceFrontier)