MachineBasicBlock.cpp revision 1ccc4684f3413d1f176a2c7a867545ce03b6414c
1aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos//===-- llvm/CodeGen/MachineBasicBlock.cpp ----------------------*- C++ -*-===// 2aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos// 3aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos// The LLVM Compiler Infrastructure 4aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos// 5aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos// This file was developed by the LLVM research group and is distributed under 6aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos// the University of Illinois Open Source License. See LICENSE.TXT for details. 7aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos// 8aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos//===----------------------------------------------------------------------===// 9aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos// 10aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos// Collect the sequence of machine instructions for a basic block. 11aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos// 12aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos//===----------------------------------------------------------------------===// 13aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos 14aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos#include "llvm/CodeGen/MachineBasicBlock.h" 15aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos#include "llvm/BasicBlock.h" 16aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos#include "llvm/CodeGen/MachineFunction.h" 17aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos#include "llvm/CodeGen/MachineInstr.h" 1807000c6f01d8f57170f2d4c77a86d934bdc5c696Owen Anderson#include "llvm/Target/TargetData.h" 19743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos#include "llvm/Target/TargetInstrInfo.h" 20743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos#include "llvm/Target/TargetMachine.h" 21551ccae044b0ff658fe629dd67edd5ffe75d10e8Reid Spencer#include "llvm/Support/LeakDetector.h" 22954da37bb492b519f5c31dc360f2a142567e08b4Reid Spencer#include <iostream> 2352c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner#include <algorithm> 24aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenosusing namespace llvm; 25aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos 2617fb34bf8cd10a798c9206eeef3bff151b4d3688Tanya LattnerMachineBasicBlock::~MachineBasicBlock() { 2717fb34bf8cd10a798c9206eeef3bff151b4d3688Tanya Lattner LeakDetector::removeGarbageObject(this); 2817fb34bf8cd10a798c9206eeef3bff151b4d3688Tanya Lattner} 2917fb34bf8cd10a798c9206eeef3bff151b4d3688Tanya Lattner 301ccc4684f3413d1f176a2c7a867545ce03b6414cChris Lattnerstd::ostream& llvm::operator<<(std::ostream &OS, const MachineBasicBlock &MBB) { 311ccc4684f3413d1f176a2c7a867545ce03b6414cChris Lattner MBB.print(OS); 321ccc4684f3413d1f176a2c7a867545ce03b6414cChris Lattner return OS; 331ccc4684f3413d1f176a2c7a867545ce03b6414cChris Lattner} 3417fb34bf8cd10a798c9206eeef3bff151b4d3688Tanya Lattner 35a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos// MBBs start out as #-1. When a MBB is added to a MachineFunction, it 360bcb1ad7be8515492ba02f64c0e43113ecdf8e32Brian Gaeke// gets the next available unique MBB number. If it is removed from a 370bcb1ad7be8515492ba02f64c0e43113ecdf8e32Brian Gaeke// MachineFunction, it goes back to being #-1. 38ca48eb9f5175058a55c1818cb1d5d06052f0092dChris Lattnervoid ilist_traits<MachineBasicBlock>::addNodeToList(MachineBasicBlock* N) { 39792699c46ef9bfc47dd459bbfa7e71bcb2cee29aTanya Lattner assert(N->Parent == 0 && "machine instruction already in a basic block"); 4017fb34bf8cd10a798c9206eeef3bff151b4d3688Tanya Lattner N->Parent = Parent; 41ca48eb9f5175058a55c1818cb1d5d06052f0092dChris Lattner N->Number = Parent->addToMBBNumbering(N); 42792699c46ef9bfc47dd459bbfa7e71bcb2cee29aTanya Lattner LeakDetector::removeGarbageObject(N); 430bcb1ad7be8515492ba02f64c0e43113ecdf8e32Brian Gaeke} 440bcb1ad7be8515492ba02f64c0e43113ecdf8e32Brian Gaeke 45ca48eb9f5175058a55c1818cb1d5d06052f0092dChris Lattnervoid ilist_traits<MachineBasicBlock>::removeNodeFromList(MachineBasicBlock* N) { 46792699c46ef9bfc47dd459bbfa7e71bcb2cee29aTanya Lattner assert(N->Parent != 0 && "machine instruction not in a basic block"); 47ca48eb9f5175058a55c1818cb1d5d06052f0092dChris Lattner N->Parent->removeFromMBBNumbering(N->Number); 480bcb1ad7be8515492ba02f64c0e43113ecdf8e32Brian Gaeke N->Number = -1; 49ca48eb9f5175058a55c1818cb1d5d06052f0092dChris Lattner N->Parent = 0; 50792699c46ef9bfc47dd459bbfa7e71bcb2cee29aTanya Lattner LeakDetector::addGarbageObject(N); 510bcb1ad7be8515492ba02f64c0e43113ecdf8e32Brian Gaeke} 520bcb1ad7be8515492ba02f64c0e43113ecdf8e32Brian Gaeke 535e61fa95196b85281eec655787e9c73267532bd1Chris Lattner 54bca81448ac8e19c588c9a4ad16fc70732b76327cChris LattnerMachineInstr* ilist_traits<MachineInstr>::createSentinel() { 558b915b4ed2c6e43413937ac71c0cbcf476ad1a98Chris Lattner MachineInstr* dummy = new MachineInstr(0, 0); 56a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos LeakDetector::removeGarbageObject(dummy); 57a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos return dummy; 58aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos} 59aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos 6052c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattnervoid ilist_traits<MachineInstr>::addNodeToList(MachineInstr* N) { 61a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos assert(N->parent == 0 && "machine instruction already in a basic block"); 62a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos N->parent = parent; 63a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos LeakDetector::removeGarbageObject(N); 64aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos} 65aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos 6652c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattnervoid ilist_traits<MachineInstr>::removeNodeFromList(MachineInstr* N) { 67a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos assert(N->parent != 0 && "machine instruction not in a basic block"); 68a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos N->parent = 0; 69a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos LeakDetector::addGarbageObject(N); 70aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos} 71aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos 72aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenosvoid ilist_traits<MachineInstr>::transferNodesFromList( 735504602836de40f07ac390a836161e45389870c2Chris Lattner iplist<MachineInstr, ilist_traits<MachineInstr> >& fromList, 74a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos ilist_iterator<MachineInstr> first, 7552c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner ilist_iterator<MachineInstr> last) { 765504602836de40f07ac390a836161e45389870c2Chris Lattner if (parent != fromList.parent) 77a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos for (; first != last; ++first) 785504602836de40f07ac390a836161e45389870c2Chris Lattner first->parent = parent; 79aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos} 80aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos 8152c09d76564d6fb24444c4d56bc8978e042e72f9Chris LattnerMachineBasicBlock::iterator MachineBasicBlock::getFirstTerminator() { 829bcdcd17c7219dbc68de2f11ca2de86471c8c390Chris Lattner const TargetInstrInfo& TII = *getParent()->getTarget().getInstrInfo(); 83743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos iterator I = end(); 84743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos while (I != begin() && TII.isTerminatorInstr((--I)->getOpcode())); 85743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos if (I != end() && !TII.isTerminatorInstr(I->getOpcode())) ++I; 86743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos return I; 87743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos} 88743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos 8952c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattnervoid MachineBasicBlock::dump() const { 90a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos print(std::cerr); 91aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos} 92aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos 9352c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattnervoid MachineBasicBlock::print(std::ostream &OS) const { 94792699c46ef9bfc47dd459bbfa7e71bcb2cee29aTanya Lattner if(!getParent()) { 9552c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner OS << "Can't print out MachineBasicBlock because parent MachineFunction" 9652c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner << " is null\n"; 97792699c46ef9bfc47dd459bbfa7e71bcb2cee29aTanya Lattner return; 98792699c46ef9bfc47dd459bbfa7e71bcb2cee29aTanya Lattner } 99a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos 100a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos const BasicBlock *LBB = getBasicBlock(); 101db3ea6754bc314cb0ba5b4c2ae534b3b33633cf1Chris Lattner OS << "\n"; 102db3ea6754bc314cb0ba5b4c2ae534b3b33633cf1Chris Lattner if (LBB) OS << LBB->getName(); 103db3ea6754bc314cb0ba5b4c2ae534b3b33633cf1Chris Lattner OS << " (" << (const void*)this 104db3ea6754bc314cb0ba5b4c2ae534b3b33633cf1Chris Lattner << ", LLVM BB @" << (const void*) LBB << ", ID#" << getNumber()<< "):\n"; 105681764b20c3418b4af783a84eb2a68145d69a9d7Chris Lattner // Print the preds of this block according to the CFG. 106681764b20c3418b4af783a84eb2a68145d69a9d7Chris Lattner if (!pred_empty()) { 107681764b20c3418b4af783a84eb2a68145d69a9d7Chris Lattner OS << " Predecessors according to CFG:"; 108681764b20c3418b4af783a84eb2a68145d69a9d7Chris Lattner for (const_pred_iterator PI = pred_begin(), E = pred_end(); PI != E; ++PI) 109681764b20c3418b4af783a84eb2a68145d69a9d7Chris Lattner OS << " " << *PI; 110681764b20c3418b4af783a84eb2a68145d69a9d7Chris Lattner OS << "\n"; 111681764b20c3418b4af783a84eb2a68145d69a9d7Chris Lattner } 112681764b20c3418b4af783a84eb2a68145d69a9d7Chris Lattner 113a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos for (const_iterator I = begin(); I != end(); ++I) { 114a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos OS << "\t"; 115a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos I->print(OS, &getParent()->getTarget()); 116a63828619feaeee7a7468ab00c50c3d678afae55Alkis Evlogimenos } 117380ae495996c84f348d12224ea9f4514f6471f59Chris Lattner 118380ae495996c84f348d12224ea9f4514f6471f59Chris Lattner // Print the successors of this block according to the CFG. 119380ae495996c84f348d12224ea9f4514f6471f59Chris Lattner if (!succ_empty()) { 120380ae495996c84f348d12224ea9f4514f6471f59Chris Lattner OS << " Successors according to CFG:"; 121380ae495996c84f348d12224ea9f4514f6471f59Chris Lattner for (const_succ_iterator SI = succ_begin(), E = succ_end(); SI != E; ++SI) 122380ae495996c84f348d12224ea9f4514f6471f59Chris Lattner OS << " " << *SI; 123380ae495996c84f348d12224ea9f4514f6471f59Chris Lattner OS << "\n"; 124380ae495996c84f348d12224ea9f4514f6471f59Chris Lattner } 125aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos} 12652c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner 127c585a3f62adb2e491d792115af637ef75bdf489eChris Lattnervoid MachineBasicBlock::moveBefore(MachineBasicBlock *NewAfter) { 128c585a3f62adb2e491d792115af637ef75bdf489eChris Lattner MachineFunction::BasicBlockListType &BBList =getParent()->getBasicBlockList(); 129c585a3f62adb2e491d792115af637ef75bdf489eChris Lattner getParent()->getBasicBlockList().splice(NewAfter, BBList, this); 130c585a3f62adb2e491d792115af637ef75bdf489eChris Lattner} 131c585a3f62adb2e491d792115af637ef75bdf489eChris Lattner 132c585a3f62adb2e491d792115af637ef75bdf489eChris Lattnervoid MachineBasicBlock::moveAfter(MachineBasicBlock *NewBefore) { 133c585a3f62adb2e491d792115af637ef75bdf489eChris Lattner MachineFunction::BasicBlockListType &BBList =getParent()->getBasicBlockList(); 134c585a3f62adb2e491d792115af637ef75bdf489eChris Lattner MachineFunction::iterator BBI = NewBefore; 135c585a3f62adb2e491d792115af637ef75bdf489eChris Lattner getParent()->getBasicBlockList().splice(++BBI, BBList, this); 136c585a3f62adb2e491d792115af637ef75bdf489eChris Lattner} 137c585a3f62adb2e491d792115af637ef75bdf489eChris Lattner 138c585a3f62adb2e491d792115af637ef75bdf489eChris Lattner 13952c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattnervoid MachineBasicBlock::addSuccessor(MachineBasicBlock *succ) { 14052c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner Successors.push_back(succ); 14152c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner succ->addPredecessor(this); 14252c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner} 14352c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner 14452c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattnervoid MachineBasicBlock::removeSuccessor(MachineBasicBlock *succ) { 14552c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner succ->removePredecessor(this); 14652c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner succ_iterator I = std::find(Successors.begin(), Successors.end(), succ); 14752c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner assert(I != Successors.end() && "Not a current successor!"); 14852c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner Successors.erase(I); 14952c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner} 15052c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner 15152c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattnervoid MachineBasicBlock::removeSuccessor(succ_iterator I) { 15252c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner assert(I != Successors.end() && "Not a current successor!"); 15352c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner (*I)->removePredecessor(this); 15452c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner Successors.erase(I); 15552c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner} 15652c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner 15752c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattnervoid MachineBasicBlock::addPredecessor(MachineBasicBlock *pred) { 15852c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner Predecessors.push_back(pred); 15952c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner} 16052c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner 16152c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattnervoid MachineBasicBlock::removePredecessor(MachineBasicBlock *pred) { 162edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman std::vector<MachineBasicBlock *>::iterator I = 16352c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner std::find(Predecessors.begin(), Predecessors.end(), pred); 16452c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner assert(I != Predecessors.end() && "Pred is not a predecessor of this block!"); 16552c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner Predecessors.erase(I); 16652c09d76564d6fb24444c4d56bc8978e042e72f9Chris Lattner} 167