1//=- llvm/CodeGen/MachineDominators.h ----------------------------*- C++ -*-==//
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 exposes interfaces to post dominance information for
11// target-specific code.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CODEGEN_MACHINEPOSTDOMINATORS_H
16#define LLVM_CODEGEN_MACHINEPOSTDOMINATORS_H
17
18#include "llvm/Analysis/Dominators.h"
19#include "llvm/CodeGen/MachineDominators.h"
20#include "llvm/CodeGen/MachineFunctionPass.h"
21
22namespace llvm {
23
24///
25/// PostDominatorTree Class - Concrete subclass of DominatorTree that is used
26/// to compute the a post-dominator tree.
27///
28struct MachinePostDominatorTree : public MachineFunctionPass {
29private:
30  DominatorTreeBase<MachineBasicBlock> *DT;
31
32public:
33  static char ID;
34
35  MachinePostDominatorTree();
36
37  ~MachinePostDominatorTree();
38
39  FunctionPass *createMachinePostDominatorTreePass();
40
41  const std::vector<MachineBasicBlock *> &getRoots() const {
42    return DT->getRoots();
43  }
44
45  MachineDomTreeNode *getRootNode() const {
46    return DT->getRootNode();
47  }
48
49  MachineDomTreeNode *operator[](MachineBasicBlock *BB) const {
50    return DT->getNode(BB);
51  }
52
53  MachineDomTreeNode *getNode(MachineBasicBlock *BB) const {
54    return DT->getNode(BB);
55  }
56
57  bool dominates(const MachineDomTreeNode *A,
58                 const MachineDomTreeNode *B) const {
59    return DT->dominates(A, B);
60  }
61
62  bool dominates(const MachineBasicBlock *A, const MachineBasicBlock *B) const {
63    return DT->dominates(A, B);
64  }
65
66  bool properlyDominates(const MachineDomTreeNode *A,
67                         const MachineDomTreeNode *B) const {
68    return DT->properlyDominates(A, B);
69  }
70
71  bool properlyDominates(const MachineBasicBlock *A,
72                         const MachineBasicBlock *B) const {
73    return DT->properlyDominates(A, B);
74  }
75
76  MachineBasicBlock *findNearestCommonDominator(MachineBasicBlock *A,
77                                                MachineBasicBlock *B) {
78    return DT->findNearestCommonDominator(A, B);
79  }
80
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;
84};
85} //end of namespace llvm
86
87#endif
88