MachineBasicBlock.cpp revision 954da37bb492b519f5c31dc360f2a142567e08b4
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#include <iostream> 22using namespace llvm; 23 24MachineBasicBlock::~MachineBasicBlock() { 25 LeakDetector::removeGarbageObject(this); 26} 27 28 29 30// MBBs start out as #-1. When a MBB is added to a MachineFunction, it 31// gets the next available unique MBB number. If it is removed from a 32// MachineFunction, it goes back to being #-1. 33void ilist_traits<MachineBasicBlock>::addNodeToList(MachineBasicBlock* N) { 34 assert(N->Parent == 0 && "machine instruction already in a basic block"); 35 N->Parent = Parent; 36 N->Number = Parent->addToMBBNumbering(N); 37 LeakDetector::removeGarbageObject(N); 38} 39 40void ilist_traits<MachineBasicBlock>::removeNodeFromList(MachineBasicBlock* N) { 41 assert(N->Parent != 0 && "machine instruction not in a basic block"); 42 N->Parent->removeFromMBBNumbering(N->Number); 43 N->Number = -1; 44 N->Parent = 0; 45 LeakDetector::addGarbageObject(N); 46} 47 48 49MachineInstr* ilist_traits<MachineInstr>::createNode() { 50 MachineInstr* dummy = new MachineInstr(0, 0); 51 LeakDetector::removeGarbageObject(dummy); 52 return dummy; 53} 54 55void ilist_traits<MachineInstr>::addNodeToList(MachineInstr* N) 56{ 57 assert(N->parent == 0 && "machine instruction already in a basic block"); 58 N->parent = parent; 59 LeakDetector::removeGarbageObject(N); 60} 61 62void ilist_traits<MachineInstr>::removeNodeFromList(MachineInstr* N) 63{ 64 assert(N->parent != 0 && "machine instruction not in a basic block"); 65 N->parent = 0; 66 LeakDetector::addGarbageObject(N); 67} 68 69void ilist_traits<MachineInstr>::transferNodesFromList( 70 iplist<MachineInstr, ilist_traits<MachineInstr> >& toList, 71 ilist_iterator<MachineInstr> first, 72 ilist_iterator<MachineInstr> last) 73{ 74 if (parent != toList.parent) 75 for (; first != last; ++first) 76 first->parent = toList.parent; 77} 78 79MachineBasicBlock::iterator MachineBasicBlock::getFirstTerminator() 80{ 81 const TargetInstrInfo& TII = *getParent()->getTarget().getInstrInfo(); 82 iterator I = end(); 83 while (I != begin() && TII.isTerminatorInstr((--I)->getOpcode())); 84 if (I != end() && !TII.isTerminatorInstr(I->getOpcode())) ++I; 85 return I; 86} 87 88void MachineBasicBlock::dump() const 89{ 90 print(std::cerr); 91} 92 93void MachineBasicBlock::print(std::ostream &OS) const 94{ 95 if(!getParent()) { 96 OS << "Can't print out MachineBasicBlock because parent MachineFunction is null\n"; 97 return; 98 } 99 const BasicBlock *LBB = getBasicBlock(); 100 if(LBB) 101 OS << "\n" << LBB->getName() << " (" << (const void*)this 102 << ", LLVM BB @" << (const void*) LBB << "):\n"; 103 for (const_iterator I = begin(); I != end(); ++I) { 104 OS << "\t"; 105 I->print(OS, &getParent()->getTarget()); 106 } 107} 108