1 //===-- llvm/CodeGen/MachineBasicBlock.cpp ----------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file was developed by the LLVM research group and is distributed under 6 // the University of Illinois Open Source License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // Collect the sequence of machine instructions for a basic block. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/CodeGen/MachineBasicBlock.h" 15 #include "llvm/BasicBlock.h" 16 #include "llvm/CodeGen/MachineFunction.h" 17 #include "llvm/CodeGen/MachineInstr.h" 18 #include "llvm/Target/TargetInstrInfo.h" 19 #include "llvm/Target/TargetMachine.h" 20 #include "Support/LeakDetector.h" 21 using namespace llvm; 22 23 MachineBasicBlock::~MachineBasicBlock() { 24 LeakDetector::removeGarbageObject(this); 25 } 26 27 28 29 // MBBs start out as #-1. When a MBB is added to a MachineFunction, it 30 // gets the next available unique MBB number. If it is removed from a 31 // MachineFunction, it goes back to being #-1. 32 void ilist_traits<MachineBasicBlock>::addNodeToList(MachineBasicBlock* N) { 33 assert(N->Parent == 0 && "machine instruction already in a basic block"); 34 N->Parent = Parent; 35 N->Number = Parent->addToMBBNumbering(N); 36 LeakDetector::removeGarbageObject(N); 37 } 38 39 void ilist_traits<MachineBasicBlock>::removeNodeFromList(MachineBasicBlock* N) { 40 assert(N->Parent != 0 && "machine instruction not in a basic block"); 41 N->Parent->removeFromMBBNumbering(N->Number); 42 N->Number = -1; 43 N->Parent = 0; 44 LeakDetector::addGarbageObject(N); 45 } 46 47 48 MachineInstr* ilist_traits<MachineInstr>::createNode() { 49 MachineInstr* dummy = new MachineInstr(0, 0); 50 LeakDetector::removeGarbageObject(dummy); 51 return dummy; 52 } 53 54 void ilist_traits<MachineInstr>::addNodeToList(MachineInstr* N) 55 { 56 assert(N->parent == 0 && "machine instruction already in a basic block"); 57 N->parent = parent; 58 LeakDetector::removeGarbageObject(N); 59 } 60 61 void ilist_traits<MachineInstr>::removeNodeFromList(MachineInstr* N) 62 { 63 assert(N->parent != 0 && "machine instruction not in a basic block"); 64 N->parent = 0; 65 LeakDetector::addGarbageObject(N); 66 } 67 68 void ilist_traits<MachineInstr>::transferNodesFromList( 69 iplist<MachineInstr, ilist_traits<MachineInstr> >& toList, 70 ilist_iterator<MachineInstr> first, 71 ilist_iterator<MachineInstr> last) 72 { 73 if (parent != toList.parent) 74 for (; first != last; ++first) 75 first->parent = toList.parent; 76 } 77 78 MachineBasicBlock::iterator MachineBasicBlock::getFirstTerminator() 79 { 80 const TargetInstrInfo& TII = *getParent()->getTarget().getInstrInfo(); 81 iterator I = end(); 82 while (I != begin() && TII.isTerminatorInstr((--I)->getOpcode())); 83 if (I != end() && !TII.isTerminatorInstr(I->getOpcode())) ++I; 84 return I; 85 } 86 87 void MachineBasicBlock::dump() const 88 { 89 print(std::cerr); 90 } 91 92 void MachineBasicBlock::print(std::ostream &OS) const 93 { 94 if(!getParent()) { 95 OS << "Can't print out MachineBasicBlock because parent MachineFunction is null\n"; 96 return; 97 } 98 const BasicBlock *LBB = getBasicBlock(); 99 if(LBB) 100 OS << "\n" << LBB->getName() << " (" << (const void*)this 101 << ", LLVM BB @" << (const void*) LBB << "):\n"; 102 for (const_iterator I = begin(); I != end(); ++I) { 103 OS << "\t"; 104 I->print(OS, &getParent()->getTarget()); 105 } 106 } 107