MachineBasicBlock.h revision fce1143bcfa73f61845002fa50473d1a01384202 
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/BasicBlock.h"
11class MachineInstr;
12
13extern AnnotationID MCFBB_AID;
14
15// FIXME: this should go away soon
16class MachineBasicBlock;
17typedef MachineBasicBlock MachineCodeForBasicBlock;
18
19class MachineBasicBlock: public Annotation {
20  std::vector<MachineInstr*> Insts;
21public:
22  MachineBasicBlock();
23  ~MachineBasicBlock() {}
24
25  // Static methods to retrieve or destroy the MachineBasicBlock
26  // object for a given basic block.
27  static MachineBasicBlock& get(const BasicBlock *bb) {
28    return *(MachineBasicBlock*)bb->getOrCreateAnnotation(MCFBB_AID);
29  }
30
31  static void destroy(const BasicBlock *bb) {
32    bb->deleteAnnotation(MCFBB_AID);
33  }
34
35  typedef std::vector<MachineInstr*>::iterator                iterator;
36  typedef std::vector<MachineInstr*>::const_iterator    const_iterator;
37  typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
38  typedef std::reverse_iterator<iterator>             reverse_iterator;
39
40  unsigned size() const { return Insts.size(); }
41  bool empty() const { return Insts.empty(); }
42
43  MachineInstr * operator[](unsigned i) const { return Insts[i]; }
44  MachineInstr *&operator[](unsigned i)       { return Insts[i]; }
45
46  MachineInstr *front() const { return Insts.front(); }
47  MachineInstr *back()  const { return Insts.back(); }
48
49  iterator                begin()       { return Insts.begin();  }
50  const_iterator          begin() const { return Insts.begin();  }
51  iterator                  end()       { return Insts.end();    }
52  const_iterator            end() const { return Insts.end();    }
53  reverse_iterator       rbegin()       { return Insts.rbegin(); }
54  const_reverse_iterator rbegin() const { return Insts.rbegin(); }
55  reverse_iterator       rend  ()       { return Insts.rend();   }
56  const_reverse_iterator rend  () const { return Insts.rend();   }
57
58  void push_back(MachineInstr *MI) { Insts.push_back(MI); }
59  template<typename IT>
60  void insert(iterator I, IT S, IT E) { Insts.insert(I, S, E); }
61  iterator insert(iterator I, MachineInstr *M) { return Insts.insert(I, M); }
62
63  // erase - Remove the specified element or range from the instruction list.
64  // These functions do not delete any instructions removed.
65  //
66  iterator erase(iterator I)             { return Insts.erase(I); }
67  iterator erase(iterator I, iterator E) { return Insts.erase(I, E); }
68
69  MachineInstr *pop_back() {
70    MachineInstr *R = back();
71    Insts.pop_back();
72    return R;
73  }
74};
75
76
77#endif
78