MachineBasicBlock.h revision 506676de323b7ef16050ac6eb01712986234539d 
1//===-- llvm/CodeGen/MachineBasicBlock.h ------------------------*- C++ -*-===//
2//
3// Collect the sequence of machine instructions for a basic block.
4//
5//===----------------------------------------------------------------------===//
6
7#ifndef LLVM_CODEGEN_MACHINEBASICBLOCK_H
8#define LLVM_CODEGEN_MACHINEBASICBLOCK_H
9
10#include "llvm/Annotation.h"
11#include <vector>
12class BasicBlock;
13class MachineInstr;
14
15extern AnnotationID MCFBB_AID;
16
17class MachineBasicBlock : public Annotation {
18  std::vector<MachineInstr*> Insts;
19public:
20  MachineBasicBlock() : Annotation(MCFBB_AID) {}
21  ~MachineBasicBlock() {}
22
23  // Static methods to retrieve or destroy the MachineBasicBlock
24  // object for a given basic block.
25  static MachineBasicBlock& get(const BasicBlock *BB) {
26    return *(MachineBasicBlock*)
27      ((Annotable*)BB)->getOrCreateAnnotation(MCFBB_AID);
28  }
29
30  static void destroy(const BasicBlock *BB) {
31    ((Annotable*)BB)->deleteAnnotation(MCFBB_AID);
32  }
33
34  typedef std::vector<MachineInstr*>::iterator                iterator;
35  typedef std::vector<MachineInstr*>::const_iterator    const_iterator;
36  typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
37  typedef std::reverse_iterator<iterator>             reverse_iterator;
38
39  unsigned size() const { return Insts.size(); }
40  bool empty() const { return Insts.empty(); }
41
42  MachineInstr * operator[](unsigned i) const { return Insts[i]; }
43  MachineInstr *&operator[](unsigned i)       { return Insts[i]; }
44
45  MachineInstr *front() const { return Insts.front(); }
46  MachineInstr *back()  const { return Insts.back(); }
47
48  iterator                begin()       { return Insts.begin();  }
49  const_iterator          begin() const { return Insts.begin();  }
50  iterator                  end()       { return Insts.end();    }
51  const_iterator            end() const { return Insts.end();    }
52  reverse_iterator       rbegin()       { return Insts.rbegin(); }
53  const_reverse_iterator rbegin() const { return Insts.rbegin(); }
54  reverse_iterator       rend  ()       { return Insts.rend();   }
55  const_reverse_iterator rend  () const { return Insts.rend();   }
56
57  void push_back(MachineInstr *MI) { Insts.push_back(MI); }
58  template<typename IT>
59  void insert(iterator I, IT S, IT E) { Insts.insert(I, S, E); }
60  iterator insert(iterator I, MachineInstr *M) { return Insts.insert(I, M); }
61
62  // erase - Remove the specified element or range from the instruction list.
63  // These functions do not delete any instructions removed.
64  //
65  iterator erase(iterator I)             { return Insts.erase(I); }
66  iterator erase(iterator I, iterator E) { return Insts.erase(I, E); }
67
68  MachineInstr *pop_back() {
69    MachineInstr *R = back();
70    Insts.pop_back();
71    return R;
72  }
73};
74
75
76#endif
77