1 //===-- MachineInstr.cpp --------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
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.
8 //===----------------------------------------------------------------------===//
10 // Methods common to all machine instructions.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/MachineInstr.h"
15 #include "llvm/CodeGen/MachineFunction.h"
16 #include "llvm/Target/TargetMachine.h"
17 #include "llvm/Target/TargetInstrInfo.h"
18 #include "llvm/Target/MRegisterInfo.h"
19 #include "llvm/Support/LeakDetector.h"
24 // Global variable holding an array of descriptors for machine instructions.
25 // The actual object needs to be created separately for each target machine.
26 // This variable is initialized and reset by class TargetInstrInfo.
28 // FIXME: This should be a property of the target so that more than one target
29 // at a time can be active...
32 extern const TargetInstrDescriptor *TargetInstrDescriptors;
35 /// MachineInstr ctor - This constructor only does a _reserve_ of the operands,
36 /// not a resize for them. It is expected that if you use this that you call
37 /// add* methods below to fill up the operands, instead of the Set methods.
38 /// Eventually, the "resizing" ctors will be phased out.
40 MachineInstr::MachineInstr(short opcode, unsigned numOperands)
41 : Opcode(opcode), parent(0) {
42 Operands.reserve(numOperands);
43 // Make sure that we get added to a machine basicblock
44 LeakDetector::addGarbageObject(this);
47 /// MachineInstr ctor - Work exactly the same as the ctor above, except that the
48 /// MachineInstr is created and added to the end of the specified basic block.
50 MachineInstr::MachineInstr(MachineBasicBlock *MBB, short opcode,
52 : Opcode(opcode), parent(0) {
53 assert(MBB && "Cannot use inserting ctor with null basic block!");
54 Operands.reserve(numOperands);
55 // Make sure that we get added to a machine basicblock
56 LeakDetector::addGarbageObject(this);
57 MBB->push_back(this); // Add instruction to end of basic block!
60 /// MachineInstr ctor - Copies MachineInstr arg exactly
62 MachineInstr::MachineInstr(const MachineInstr &MI) {
63 Opcode = MI.getOpcode();
64 Operands.reserve(MI.getNumOperands());
67 for (unsigned i = 0; i != MI.getNumOperands(); ++i)
68 Operands.push_back(MI.getOperand(i));
70 // Set parent, next, and prev to null
77 MachineInstr::~MachineInstr() {
78 LeakDetector::removeGarbageObject(this);
81 /// removeFromParent - This method unlinks 'this' from the containing basic
82 /// block, and returns it, but does not delete it.
83 MachineInstr *MachineInstr::removeFromParent() {
84 assert(getParent() && "Not embedded in a basic block!");
85 getParent()->remove(this);
90 /// OperandComplete - Return true if it's illegal to add a new operand
92 bool MachineInstr::OperandsComplete() const {
93 int NumOperands = TargetInstrDescriptors[Opcode].numOperands;
94 if ((TargetInstrDescriptors[Opcode].Flags & M_VARIABLE_OPS) == 0 &&
95 getNumOperands() >= (unsigned)NumOperands)
96 return true; // Broken: we have all the operands of this instruction!
100 void MachineInstr::dump() const {
101 std::cerr << " " << *this;
104 static inline void OutputReg(std::ostream &os, unsigned RegNo,
105 const MRegisterInfo *MRI = 0) {
106 if (!RegNo || MRegisterInfo::isPhysicalRegister(RegNo)) {
108 os << "%" << MRI->get(RegNo).Name;
110 os << "%mreg(" << RegNo << ")";
112 os << "%reg" << RegNo;
115 static void print(const MachineOperand &MO, std::ostream &OS,
116 const TargetMachine *TM) {
117 const MRegisterInfo *MRI = 0;
119 if (TM) MRI = TM->getRegisterInfo();
121 switch (MO.getType()) {
122 case MachineOperand::MO_Register:
123 OutputReg(OS, MO.getReg(), MRI);
125 case MachineOperand::MO_Immediate:
126 OS << MO.getImmedValue();
128 case MachineOperand::MO_MachineBasicBlock:
130 << ((Value*)MO.getMachineBasicBlock()->getBasicBlock())->getName()
131 << "," << (void*)MO.getMachineBasicBlock() << ">";
133 case MachineOperand::MO_FrameIndex:
134 OS << "<fi#" << MO.getFrameIndex() << ">";
136 case MachineOperand::MO_ConstantPoolIndex:
137 OS << "<cp#" << MO.getConstantPoolIndex() << ">";
139 case MachineOperand::MO_JumpTableIndex:
140 OS << "<jt#" << MO.getJumpTableIndex() << ">";
142 case MachineOperand::MO_GlobalAddress:
143 OS << "<ga:" << ((Value*)MO.getGlobal())->getName();
144 if (MO.getOffset()) OS << "+" << MO.getOffset();
147 case MachineOperand::MO_ExternalSymbol:
148 OS << "<es:" << MO.getSymbolName();
149 if (MO.getOffset()) OS << "+" << MO.getOffset();
153 assert(0 && "Unrecognized operand type");
157 void MachineInstr::print(std::ostream &OS, const TargetMachine *TM) const {
158 unsigned StartOp = 0;
160 // Specialize printing if op#0 is definition
161 if (getNumOperands() && getOperand(0).isDef() && !getOperand(0).isUse()) {
162 ::print(getOperand(0), OS, TM);
164 ++StartOp; // Don't print this operand again!
167 // Must check if Target machine is not null because machine BB could not
168 // be attached to a Machine function yet
170 OS << TM->getInstrInfo()->getName(getOpcode());
172 for (unsigned i = StartOp, e = getNumOperands(); i != e; ++i) {
173 const MachineOperand& mop = getOperand(i);
177 ::print(mop, OS, TM);
189 std::ostream &llvm::operator<<(std::ostream &os, const MachineInstr &MI) {
190 // If the instruction is embedded into a basic block, we can find the target
191 // info for the instruction.
192 if (const MachineBasicBlock *MBB = MI.getParent()) {
193 const MachineFunction *MF = MBB->getParent();
195 MI.print(os, &MF->getTarget());
201 // Otherwise, print it out in the "raw" format without symbolic register names
203 os << TargetInstrDescriptors[MI.getOpcode()].Name;
205 for (unsigned i = 0, N = MI.getNumOperands(); i < N; i++) {
206 os << "\t" << MI.getOperand(i);
207 if (MI.getOperand(i).isDef())
208 if (MI.getOperand(i).isUse())
217 std::ostream &llvm::operator<<(std::ostream &OS, const MachineOperand &MO) {
218 switch (MO.getType()) {
219 case MachineOperand::MO_Register:
220 OutputReg(OS, MO.getReg());
222 case MachineOperand::MO_Immediate:
223 OS << (long)MO.getImmedValue();
225 case MachineOperand::MO_MachineBasicBlock:
227 << ((Value*)MO.getMachineBasicBlock()->getBasicBlock())->getName()
228 << "@" << (void*)MO.getMachineBasicBlock() << ">";
230 case MachineOperand::MO_FrameIndex:
231 OS << "<fi#" << MO.getFrameIndex() << ">";
233 case MachineOperand::MO_ConstantPoolIndex:
234 OS << "<cp#" << MO.getConstantPoolIndex() << ">";
236 case MachineOperand::MO_JumpTableIndex:
237 OS << "<jt#" << MO.getJumpTableIndex() << ">";
239 case MachineOperand::MO_GlobalAddress:
240 OS << "<ga:" << ((Value*)MO.getGlobal())->getName() << ">";
242 case MachineOperand::MO_ExternalSymbol:
243 OS << "<es:" << MO.getSymbolName() << ">";
246 assert(0 && "Unrecognized operand type");