1 //===-- llvm/CodeGen/MachineBasicBlock.h ------------------------*- C++ -*-===//
3 // Collect the sequence of machine instructions for a basic block.
5 //===----------------------------------------------------------------------===//
7 #ifndef LLVM_CODEGEN_MACHINEBASICBLOCK_H
8 #define LLVM_CODEGEN_MACHINEBASICBLOCK_H
13 template <typename T> struct ilist_traits;
15 class MachineBasicBlock {
16 std::vector<MachineInstr*> Insts;
17 MachineBasicBlock *Prev, *Next;
20 MachineBasicBlock(const BasicBlock *bb = 0) : Prev(0), Next(0), BB(bb) {}
21 ~MachineBasicBlock() {}
23 /// getBasicBlock - Return the LLVM basic block that this instance
24 /// corresponded to originally.
26 const BasicBlock *getBasicBlock() const { return BB; }
28 typedef std::vector<MachineInstr*>::iterator iterator;
29 typedef std::vector<MachineInstr*>::const_iterator const_iterator;
30 typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
31 typedef std::reverse_iterator<iterator> reverse_iterator;
33 unsigned size() const { return Insts.size(); }
34 bool empty() const { return Insts.empty(); }
36 MachineInstr * operator[](unsigned i) const { return Insts[i]; }
37 MachineInstr *&operator[](unsigned i) { return Insts[i]; }
39 MachineInstr *front() const { return Insts.front(); }
40 MachineInstr *back() const { return Insts.back(); }
42 iterator begin() { return Insts.begin(); }
43 const_iterator begin() const { return Insts.begin(); }
44 iterator end() { return Insts.end(); }
45 const_iterator end() const { return Insts.end(); }
46 reverse_iterator rbegin() { return Insts.rbegin(); }
47 const_reverse_iterator rbegin() const { return Insts.rbegin(); }
48 reverse_iterator rend () { return Insts.rend(); }
49 const_reverse_iterator rend () const { return Insts.rend(); }
51 void push_back(MachineInstr *MI) { Insts.push_back(MI); }
53 void insert(iterator I, IT S, IT E) { Insts.insert(I, S, E); }
54 iterator insert(iterator I, MachineInstr *M) { return Insts.insert(I, M); }
56 // erase - Remove the specified element or range from the instruction list.
57 // These functions do not delete any instructions removed.
59 iterator erase(iterator I) { return Insts.erase(I); }
60 iterator erase(iterator I, iterator E) { return Insts.erase(I, E); }
62 MachineInstr *pop_back() {
63 MachineInstr *R = back();
68 private: // Methods used to maintain doubly linked list of blocks...
69 friend class ilist_traits<MachineBasicBlock>;
71 MachineBasicBlock *getPrev() const { return Prev; }
72 MachineBasicBlock *getNext() const { return Next; }
73 void setPrev(MachineBasicBlock *P) { Prev = P; }
74 void setNext(MachineBasicBlock *N) { Next = N; }