MachineBasicBlock.h revision d0aa0cdbc6fee00f2b2019633a9b9d00d301ac68 
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 <vector>
11class BasicBlock;
12class MachineInstr;
13template <typename T> struct ilist_traits;
14
15class MachineBasicBlock {
16  std::vector<MachineInstr*> Insts;
17  MachineBasicBlock *Prev, *Next;
18  BasicBlock *BB;
19public:
20  MachineBasicBlock(BasicBlock *bb = 0) : Prev(0), Next(0), BB(bb) {}
21  ~MachineBasicBlock() {}
22
23  // get - This deprecated static method returns the MachineBasicBlock object
24  // for the specified BasicBlock.
25  //
26  static MachineBasicBlock& get(const BasicBlock *BB);
27
28  /// getBasicBlock - Return the LLVM basic block that this instance
29  /// corresponded to originally.
30  ///
31  BasicBlock *getBasicBlock() const { return BB; }
32
33  typedef std::vector<MachineInstr*>::iterator                iterator;
34  typedef std::vector<MachineInstr*>::const_iterator    const_iterator;
35  typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
36  typedef std::reverse_iterator<iterator>             reverse_iterator;
37
38  unsigned size() const { return Insts.size(); }
39  bool empty() const { return Insts.empty(); }
40
41  MachineInstr * operator[](unsigned i) const { return Insts[i]; }
42  MachineInstr *&operator[](unsigned i)       { return Insts[i]; }
43
44  MachineInstr *front() const { return Insts.front(); }
45  MachineInstr *back()  const { return Insts.back(); }
46
47  iterator                begin()       { return Insts.begin();  }
48  const_iterator          begin() const { return Insts.begin();  }
49  iterator                  end()       { return Insts.end();    }
50  const_iterator            end() const { return Insts.end();    }
51  reverse_iterator       rbegin()       { return Insts.rbegin(); }
52  const_reverse_iterator rbegin() const { return Insts.rbegin(); }
53  reverse_iterator       rend  ()       { return Insts.rend();   }
54  const_reverse_iterator rend  () const { return Insts.rend();   }
55
56  void push_back(MachineInstr *MI) { Insts.push_back(MI); }
57  template<typename IT>
58  void insert(iterator I, IT S, IT E) { Insts.insert(I, S, E); }
59  iterator insert(iterator I, MachineInstr *M) { return Insts.insert(I, M); }
60
61  // erase - Remove the specified element or range from the instruction list.
62  // These functions do not delete any instructions removed.
63  //
64  iterator erase(iterator I)             { return Insts.erase(I); }
65  iterator erase(iterator I, iterator E) { return Insts.erase(I, E); }
66
67  MachineInstr *pop_back() {
68    MachineInstr *R = back();
69    Insts.pop_back();
70    return R;
71  }
72
73private:   // Methods used to maintain doubly linked list of blocks...
74  friend class ilist_traits<MachineBasicBlock>;
75
76  MachineBasicBlock *getPrev() const { return Prev; }
77  MachineBasicBlock *getNext() const { return Next; }
78  void setPrev(MachineBasicBlock *P) { Prev = P; }
79  void setNext(MachineBasicBlock *N) { Next = N; }
80};
81
82
83#endif
84