Add some constantness in MachinePostDominators.h.
[oota-llvm.git] / include / llvm / CodeGen / MachinePostDominators.h
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/DominatorInternals.h"
19 #include "llvm/Analysis/Dominators.h"
20 #include "llvm/CodeGen/MachineDominators.h"
21 #include "llvm/CodeGen/MachineFunctionPass.h"
22
23 namespace llvm {
24
25 ///
26 /// PostDominatorTree Class - Concrete subclass of DominatorTree that is used
27 /// to compute the a post-dominator tree.
28 ///
29 struct MachinePostDominatorTree : public MachineFunctionPass {
30 private:
31   DominatorTreeBase<MachineBasicBlock> *DT;
32
33 public:
34   static char ID;
35
36   MachinePostDominatorTree();
37
38   ~MachinePostDominatorTree();
39
40   FunctionPass *createMachinePostDominatorTreePass();
41
42   const std::vector<MachineBasicBlock *> &getRoots() const {
43     return DT->getRoots();
44   }
45
46   MachineDomTreeNode *getRootNode() const {
47     return DT->getRootNode();
48   }
49
50   MachineDomTreeNode *operator[](MachineBasicBlock *BB) const {
51     return DT->getNode(BB);
52   }
53
54   MachineDomTreeNode *getNode(MachineBasicBlock *BB) const {
55     return DT->getNode(BB);
56   }
57
58   bool dominates(const MachineDomTreeNode *A,
59                  const MachineDomTreeNode *B) const {
60     return DT->dominates(A, B);
61   }
62
63   bool dominates(const MachineBasicBlock *A, const MachineBasicBlock *B) const {
64     return DT->dominates(A, B);
65   }
66
67   bool properlyDominates(const MachineDomTreeNode *A,
68                          const MachineDomTreeNode *B) const {
69     return DT->properlyDominates(A, B);
70   }
71
72   bool properlyDominates(const MachineBasicBlock *A,
73                          const MachineBasicBlock *B) const {
74     return DT->properlyDominates(A, B);
75   }
76
77   MachineBasicBlock *findNearestCommonDominator(MachineBasicBlock *A,
78                                                 MachineBasicBlock *B) {
79     return DT->findNearestCommonDominator(A, B);
80   }
81
82   virtual bool runOnMachineFunction(MachineFunction &MF);
83   virtual void getAnalysisUsage(AnalysisUsage &AU) const;
84   virtual void print(llvm::raw_ostream &OS, const Module *M = 0) const;
85 };
86 } //end of namespace llvm
87
88 #endif