1 //=- llvm/CodeGen/MachineDominators.h ----------------------------*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file exposes interfaces to post dominance information for
11 // target-specific code.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CODEGEN_MACHINEPOSTDOMINATORS_H
16 #define LLVM_CODEGEN_MACHINEPOSTDOMINATORS_H
18 #include "llvm/Analysis/Dominators.h"
19 #include "llvm/CodeGen/MachineDominators.h"
20 #include "llvm/CodeGen/MachineFunctionPass.h"
25 /// PostDominatorTree Class - Concrete subclass of DominatorTree that is used
26 /// to compute the a post-dominator tree.
28 struct MachinePostDominatorTree : public MachineFunctionPass {
30 DominatorTreeBase<MachineBasicBlock> *DT;
35 MachinePostDominatorTree();
37 ~MachinePostDominatorTree();
39 FunctionPass *createMachinePostDominatorTreePass();
41 const std::vector<MachineBasicBlock *> &getRoots() const {
42 return DT->getRoots();
45 MachineDomTreeNode *getRootNode() const {
46 return DT->getRootNode();
49 MachineDomTreeNode *operator[](MachineBasicBlock *BB) const {
50 return DT->getNode(BB);
53 MachineDomTreeNode *getNode(MachineBasicBlock *BB) const {
54 return DT->getNode(BB);
57 bool dominates(const MachineDomTreeNode *A,
58 const MachineDomTreeNode *B) const {
59 return DT->dominates(A, B);
62 bool dominates(const MachineBasicBlock *A, const MachineBasicBlock *B) const {
63 return DT->dominates(A, B);
66 bool properlyDominates(const MachineDomTreeNode *A,
67 const MachineDomTreeNode *B) const {
68 return DT->properlyDominates(A, B);
71 bool properlyDominates(const MachineBasicBlock *A,
72 const MachineBasicBlock *B) const {
73 return DT->properlyDominates(A, B);
76 MachineBasicBlock *findNearestCommonDominator(MachineBasicBlock *A,
77 MachineBasicBlock *B) {
78 return DT->findNearestCommonDominator(A, B);
81 virtual bool runOnMachineFunction(MachineFunction &MF);
82 virtual void getAnalysisUsage(AnalysisUsage &AU) const;
83 virtual void print(llvm::raw_ostream &OS, const Module *M = 0) const;
85 } //end of namespace llvm