1 //===-- MachineInstr.cpp --------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // 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"
20 #include "llvm/Support/Streams.h"
24 //===----------------------------------------------------------------------===//
25 // MachineOperand Implementation
26 //===----------------------------------------------------------------------===//
28 /// isIdenticalTo - Return true if this operand is identical to the specified
30 bool MachineOperand::isIdenticalTo(const MachineOperand &Other) const {
31 if (getType() != Other.getType()) return false;
34 default: assert(0 && "Unrecognized operand type");
35 case MachineOperand::MO_Register:
36 return getReg() == Other.getReg() && isDef() == Other.isDef() &&
37 getSubReg() == Other.getSubReg();
38 case MachineOperand::MO_Immediate:
39 return getImm() == Other.getImm();
40 case MachineOperand::MO_MachineBasicBlock:
41 return getMBB() == Other.getMBB();
42 case MachineOperand::MO_FrameIndex:
43 return getIndex() == Other.getIndex();
44 case MachineOperand::MO_ConstantPoolIndex:
45 return getIndex() == Other.getIndex() && getOffset() == Other.getOffset();
46 case MachineOperand::MO_JumpTableIndex:
47 return getIndex() == Other.getIndex();
48 case MachineOperand::MO_GlobalAddress:
49 return getGlobal() == Other.getGlobal() && getOffset() == Other.getOffset();
50 case MachineOperand::MO_ExternalSymbol:
51 return !strcmp(getSymbolName(), Other.getSymbolName()) &&
52 getOffset() == Other.getOffset();
56 /// print - Print the specified machine operand.
58 void MachineOperand::print(std::ostream &OS, const TargetMachine *TM) const {
60 case MachineOperand::MO_Register:
61 if (getReg() == 0 || MRegisterInfo::isVirtualRegister(getReg())) {
62 OS << "%reg" << getReg();
64 // If the instruction is embedded into a basic block, we can find the
66 // info for the instruction.
68 if (const MachineInstr *MI = getParent())
69 if (const MachineBasicBlock *MBB = MI->getParent())
70 if (const MachineFunction *MF = MBB->getParent())
71 TM = &MF->getTarget();
74 OS << "%" << TM->getRegisterInfo()->get(getReg()).Name;
76 OS << "%mreg" << getReg();
79 if (isDef() || isKill() || isDead() || isImplicit()) {
81 bool NeedComma = false;
83 OS << (isDef() ? "imp-def" : "imp-use");
89 if (isKill() || isDead()) {
90 if (NeedComma) OS << ",";
91 if (isKill()) OS << "kill";
92 if (isDead()) OS << "dead";
97 case MachineOperand::MO_Immediate:
100 case MachineOperand::MO_MachineBasicBlock:
102 << ((Value*)getMBB()->getBasicBlock())->getName()
103 << "," << (void*)getMBB() << ">";
105 case MachineOperand::MO_FrameIndex:
106 OS << "<fi#" << getIndex() << ">";
108 case MachineOperand::MO_ConstantPoolIndex:
109 OS << "<cp#" << getIndex();
110 if (getOffset()) OS << "+" << getOffset();
113 case MachineOperand::MO_JumpTableIndex:
114 OS << "<jt#" << getIndex() << ">";
116 case MachineOperand::MO_GlobalAddress:
117 OS << "<ga:" << ((Value*)getGlobal())->getName();
118 if (getOffset()) OS << "+" << getOffset();
121 case MachineOperand::MO_ExternalSymbol:
122 OS << "<es:" << getSymbolName();
123 if (getOffset()) OS << "+" << getOffset();
127 assert(0 && "Unrecognized operand type");
131 //===----------------------------------------------------------------------===//
132 // MachineInstr Implementation
133 //===----------------------------------------------------------------------===//
135 /// MachineInstr ctor - This constructor creates a dummy MachineInstr with
136 /// TID NULL and no operands.
137 MachineInstr::MachineInstr()
138 : TID(0), NumImplicitOps(0), parent(0) {
139 // Make sure that we get added to a machine basicblock
140 LeakDetector::addGarbageObject(this);
143 void MachineInstr::addImplicitDefUseOperands() {
144 if (TID->ImplicitDefs)
145 for (const unsigned *ImpDefs = TID->ImplicitDefs; *ImpDefs; ++ImpDefs)
146 addOperand(MachineOperand::CreateReg(*ImpDefs, true, true));
147 if (TID->ImplicitUses)
148 for (const unsigned *ImpUses = TID->ImplicitUses; *ImpUses; ++ImpUses)
149 addOperand(MachineOperand::CreateReg(*ImpUses, false, true));
152 /// MachineInstr ctor - This constructor create a MachineInstr and add the
153 /// implicit operands. It reserves space for number of operands specified by
154 /// TargetInstrDescriptor or the numOperands if it is not zero. (for
155 /// instructions with variable number of operands).
156 MachineInstr::MachineInstr(const TargetInstrDescriptor &tid, bool NoImp)
157 : TID(&tid), NumImplicitOps(0), parent(0) {
158 if (!NoImp && TID->ImplicitDefs)
159 for (const unsigned *ImpDefs = TID->ImplicitDefs; *ImpDefs; ++ImpDefs)
161 if (!NoImp && TID->ImplicitUses)
162 for (const unsigned *ImpUses = TID->ImplicitUses; *ImpUses; ++ImpUses)
164 Operands.reserve(NumImplicitOps + TID->numOperands);
166 addImplicitDefUseOperands();
167 // Make sure that we get added to a machine basicblock
168 LeakDetector::addGarbageObject(this);
171 /// MachineInstr ctor - Work exactly the same as the ctor above, except that the
172 /// MachineInstr is created and added to the end of the specified basic block.
174 MachineInstr::MachineInstr(MachineBasicBlock *MBB,
175 const TargetInstrDescriptor &tid)
176 : TID(&tid), NumImplicitOps(0), parent(0) {
177 assert(MBB && "Cannot use inserting ctor with null basic block!");
178 if (TID->ImplicitDefs)
179 for (const unsigned *ImpDefs = TID->ImplicitDefs; *ImpDefs; ++ImpDefs)
181 if (TID->ImplicitUses)
182 for (const unsigned *ImpUses = TID->ImplicitUses; *ImpUses; ++ImpUses)
184 Operands.reserve(NumImplicitOps + TID->numOperands);
185 addImplicitDefUseOperands();
186 // Make sure that we get added to a machine basicblock
187 LeakDetector::addGarbageObject(this);
188 MBB->push_back(this); // Add instruction to end of basic block!
191 /// MachineInstr ctor - Copies MachineInstr arg exactly
193 MachineInstr::MachineInstr(const MachineInstr &MI) {
194 TID = MI.getInstrDescriptor();
195 NumImplicitOps = MI.NumImplicitOps;
196 Operands.reserve(MI.getNumOperands());
199 for (unsigned i = 0; i != MI.getNumOperands(); ++i) {
200 Operands.push_back(MI.getOperand(i));
201 Operands.back().ParentMI = this;
204 // Set parent, next, and prev to null
211 MachineInstr::~MachineInstr() {
212 LeakDetector::removeGarbageObject(this);
214 for (unsigned i = 0, e = Operands.size(); i != e; ++i)
215 assert(Operands[i].ParentMI == this && "ParentMI mismatch!");
219 /// getOpcode - Returns the opcode of this MachineInstr.
221 int MachineInstr::getOpcode() const {
225 /// removeFromParent - This method unlinks 'this' from the containing basic
226 /// block, and returns it, but does not delete it.
227 MachineInstr *MachineInstr::removeFromParent() {
228 assert(getParent() && "Not embedded in a basic block!");
229 getParent()->remove(this);
234 /// OperandComplete - Return true if it's illegal to add a new operand
236 bool MachineInstr::OperandsComplete() const {
237 unsigned short NumOperands = TID->numOperands;
238 if ((TID->Flags & M_VARIABLE_OPS) == 0 &&
239 getNumOperands()-NumImplicitOps >= NumOperands)
240 return true; // Broken: we have all the operands of this instruction!
244 /// getNumExplicitOperands - Returns the number of non-implicit operands.
246 unsigned MachineInstr::getNumExplicitOperands() const {
247 unsigned NumOperands = TID->numOperands;
248 if ((TID->Flags & M_VARIABLE_OPS) == 0)
251 for (unsigned e = getNumOperands(); NumOperands != e; ++NumOperands) {
252 const MachineOperand &MO = getOperand(NumOperands);
253 if (!MO.isRegister() || !MO.isImplicit())
260 /// findRegisterUseOperandIdx() - Returns the MachineOperand that is a use of
261 /// the specific register or -1 if it is not found. It further tightening
262 /// the search criteria to a use that kills the register if isKill is true.
263 int MachineInstr::findRegisterUseOperandIdx(unsigned Reg, bool isKill) const {
264 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
265 const MachineOperand &MO = getOperand(i);
266 if (MO.isRegister() && MO.isUse() && MO.getReg() == Reg)
267 if (!isKill || MO.isKill())
273 /// findRegisterDefOperand() - Returns the MachineOperand that is a def of
274 /// the specific register or NULL if it is not found.
275 MachineOperand *MachineInstr::findRegisterDefOperand(unsigned Reg) {
276 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
277 MachineOperand &MO = getOperand(i);
278 if (MO.isRegister() && MO.isDef() && MO.getReg() == Reg)
284 /// findFirstPredOperandIdx() - Find the index of the first operand in the
285 /// operand list that is used to represent the predicate. It returns -1 if
287 int MachineInstr::findFirstPredOperandIdx() const {
288 const TargetInstrDescriptor *TID = getInstrDescriptor();
289 if (TID->Flags & M_PREDICABLE) {
290 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
291 if ((TID->OpInfo[i].Flags & M_PREDICATE_OPERAND))
298 /// isRegReDefinedByTwoAddr - Returns true if the Reg re-definition is due
299 /// to two addr elimination.
300 bool MachineInstr::isRegReDefinedByTwoAddr(unsigned Reg) const {
301 const TargetInstrDescriptor *TID = getInstrDescriptor();
302 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
303 const MachineOperand &MO1 = getOperand(i);
304 if (MO1.isRegister() && MO1.isDef() && MO1.getReg() == Reg) {
305 for (unsigned j = i+1; j < e; ++j) {
306 const MachineOperand &MO2 = getOperand(j);
307 if (MO2.isRegister() && MO2.isUse() && MO2.getReg() == Reg &&
308 TID->getOperandConstraint(j, TOI::TIED_TO) == (int)i)
316 /// copyKillDeadInfo - Copies kill / dead operand properties from MI.
318 void MachineInstr::copyKillDeadInfo(const MachineInstr *MI) {
319 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
320 const MachineOperand &MO = MI->getOperand(i);
321 if (!MO.isRegister() || (!MO.isKill() && !MO.isDead()))
323 for (unsigned j = 0, ee = getNumOperands(); j != ee; ++j) {
324 MachineOperand &MOp = getOperand(j);
325 if (!MOp.isIdenticalTo(MO))
336 /// copyPredicates - Copies predicate operand(s) from MI.
337 void MachineInstr::copyPredicates(const MachineInstr *MI) {
338 const TargetInstrDescriptor *TID = MI->getInstrDescriptor();
339 if (TID->Flags & M_PREDICABLE) {
340 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
341 if ((TID->OpInfo[i].Flags & M_PREDICATE_OPERAND)) {
342 // Predicated operands must be last operands.
343 addOperand(MI->getOperand(i));
349 void MachineInstr::dump() const {
350 cerr << " " << *this;
353 void MachineInstr::print(std::ostream &OS, const TargetMachine *TM) const {
354 // Specialize printing if op#0 is definition
355 unsigned StartOp = 0;
356 if (getNumOperands() && getOperand(0).isRegister() && getOperand(0).isDef()) {
357 getOperand(0).print(OS, TM);
359 ++StartOp; // Don't print this operand again!
362 OS << getInstrDescriptor()->Name;
364 for (unsigned i = StartOp, e = getNumOperands(); i != e; ++i) {
368 getOperand(i).print(OS, TM);