return *this;
}
- bool operator==(const MachineOperand& rhs) const {
- return regNum == rhs.regNum && opType == rhs.opType;
- }
-
// Accessor methods. Caller is responsible for checking the
// operand type before invoking the corresponding accessor.
//
return *SymbolName;
}
- bool isUse () const { return flags & USEFLAG; }
- bool isEverUsed (const MachineInstr&) const;
- bool isDef () const { return flags & DEFFLAG; }
- bool isHiBits32 () const { return flags & HIFLAG32; }
- bool isEverDefined (const MachineInstr&) const;
- bool isLoBits32 () const { return flags & LOFLAG32; }
- bool isHiBits64 () const { return flags & HIFLAG64; }
- bool isLoBits64 () const { return flags & LOFLAG64; }
+ bool isUse () const { return flags & USEFLAG; }
+ MachineOperand& setUse () { flags |= USEFLAG; return *this; }
+ bool isDef () const { return flags & DEFFLAG; }
+ MachineOperand& setDef () { flags |= DEFFLAG; return *this; }
+ bool isHiBits32 () const { return flags & HIFLAG32; }
+ bool isLoBits32 () const { return flags & LOFLAG32; }
+ bool isHiBits64 () const { return flags & HIFLAG64; }
+ bool isLoBits64 () const { return flags & LOFLAG64; }
// used to check if a machine register has been allocated to this operand
bool hasAllocatedReg() const {
/// calls that are expected, it does not include the destination register.
///
inline MachineInstrBuilder BuildMI(int Opcode, unsigned NumOperands,
- unsigned DestReg) {
+ unsigned DestReg,
+ MOTy::UseType useType = MOTy::Def) {
return MachineInstrBuilder(new MachineInstr(Opcode, NumOperands+1,
- true, true)).addReg(DestReg, MOTy::Def);
+ true, true)).addReg(DestReg, useType);
}
//
extern const TargetInstrDescriptor *TargetInstrDescriptors;
-bool MachineOperand::isEverUsed(const MachineInstr& mi) const
-{
- for (int i = 0, e = mi.getNumOperands(); i != e; ++i) {
- if (*this == mi.getOperand(i) && mi.getOperand(i).isUse())
- return true;
- }
- return false;
-}
-
-bool MachineOperand::isEverDefined(const MachineInstr& mi) const
-{
- for (int i = 0, e = mi.getNumOperands(); i != e; ++i) {
- if (*this == mi.getOperand(i) && mi.getOperand(i).isDef())
- return true;
- }
- return false;
-}
-
// Constructor for instructions with variable #operands
MachineInstr::MachineInstr(MachineOpCode OpCode, unsigned numOperands)
: opCode(OpCode),
typedef std::vector<const LiveIntervals::Interval*> IntervalPtrs;
IntervalPtrs unhandled_, fixed_, active_, inactive_;
- typedef std::vector<unsigned> Regs;
- Regs tempUseOperands_;
- Regs tempDefOperands_;
-
PhysRegTracker prt_;
typedef std::map<unsigned, unsigned> Virt2PhysMap;
for (currentInstr_ = currentMbb_->begin();
currentInstr_ != currentMbb_->end(); ) {
-
DEBUG(std::cerr << "\tinstruction: ";
(*currentInstr_)->print(std::cerr, *tm_););
continue;
}
+ typedef std::vector<unsigned> Regs;
+ Regs toClear;
+ Regs toSpill;
+
+ const unsigned numOperands = (*currentInstr_)->getNumOperands();
+
DEBUG(std::cerr << "\t\tloading temporarily used operands to "
"registers:\n");
- for (unsigned i = 0, e = (*currentInstr_)->getNumOperands();
- i != e; ++i) {
+ for (unsigned i = 0; i != numOperands; ++i) {
MachineOperand& op = (*currentInstr_)->getOperand(i);
- if (op.isVirtualRegister() && op.isUse() &&
- !op.isEverDefined(**currentInstr_)) {
+ if (op.isVirtualRegister() && op.isUse()) {
unsigned virtReg = op.getAllocatedRegNum();
unsigned physReg = 0;
Virt2PhysMap::const_iterator it = v2pMap_.find(virtReg);
else {
physReg = getFreeTempPhysReg(virtReg);
loadVirt2PhysReg(virtReg, physReg);
- tempUseOperands_.push_back(virtReg);
+ // we will clear uses that are not also defs
+ // before we allocate registers the defs
+ if (op.isDef())
+ toSpill.push_back(virtReg);
+ else
+ toClear.push_back(virtReg);
}
(*currentInstr_)->SetMachineOperandReg(i, physReg);
}
}
- DEBUG(std::cerr << "\t\tclearing temporarily used operands:\n");
- for (unsigned i = 0, e = tempUseOperands_.size(); i != e; ++i) {
- clearVirtReg(tempUseOperands_[i]);
- }
- tempUseOperands_.clear();
+ DEBUG(std::cerr << "\t\tclearing temporarily used but not defined "
+ "operands:\n");
+ std::for_each(toClear.begin(), toClear.end(),
+ std::bind1st(std::mem_fun(&RA::clearVirtReg), this));
DEBUG(std::cerr << "\t\tassigning temporarily defined operands to "
"registers:\n");
- for (unsigned i = 0, e = (*currentInstr_)->getNumOperands();
- i != e; ++i) {
+ for (unsigned i = 0; i != numOperands; ++i) {
MachineOperand& op = (*currentInstr_)->getOperand(i);
if (op.isVirtualRegister()) {
- assert(op.isEverDefined(**currentInstr_) &&
- "operand should be defined by this instruction");
+ assert(!op.isUse() && "we should not have uses here!");
unsigned virtReg = op.getAllocatedRegNum();
unsigned physReg = 0;
Virt2PhysMap::const_iterator it = v2pMap_.find(virtReg);
else {
physReg = getFreeTempPhysReg(virtReg);
assignVirt2PhysReg(virtReg, physReg);
- tempDefOperands_.push_back(virtReg);
+ // need to spill this after we are done with
+ // this instruction
+ toSpill.push_back(virtReg);
}
(*currentInstr_)->SetMachineOperandReg(i, physReg);
}
}
+ ++currentInstr_; // spills will go after this instruction
- DEBUG(std::cerr << "\t\tspilling temporarily defined operands "
- "of this instruction:\n");
- ++currentInstr_; // we want to insert after this instruction
- for (unsigned i = 0, e = tempDefOperands_.size(); i != e; ++i) {
- spillVirtReg(tempDefOperands_[i]);
- }
- --currentInstr_; // restore currentInstr_ iterator
- tempDefOperands_.clear();
- ++currentInstr_;
+ DEBUG(std::cerr << "\t\tspilling temporarily defined operands:\n");
+ std::for_each(toSpill.begin(), toSpill.end(),
+ std::bind1st(std::mem_fun(&RA::spillVirtReg), this));
}
}
// to:
//
// A = B
-// A = A op C
+// A op= C
//
-// Note that if a register allocator chooses to use this pass, that it has to
-// be capable of handling the non-SSA nature of these rewritten virtual
-// registers.
+// Note that if a register allocator chooses to use this pass, that it
+// has to be capable of handling the non-SSA nature of these rewritten
+// virtual registers.
+//
+// It is also worth noting that the duplicate operand of the two
+// address instruction is removed.
//
//===----------------------------------------------------------------------===//
mi->getOperand(1).isUse() &&
"two address instruction invalid");
- // we have nothing to do if the two operands are the same
+ // if the two operands are the same we just remove the use
+ // and mark the def as def&use
if (mi->getOperand(0).getAllocatedRegNum() ==
- mi->getOperand(1).getAllocatedRegNum())
- continue;
-
- MadeChange = true;
-
- // rewrite:
- // a = b op c
- // to:
- // a = b
- // a = a op c
- unsigned regA = mi->getOperand(0).getAllocatedRegNum();
- unsigned regB = mi->getOperand(1).getAllocatedRegNum();
-
- assert(MRegisterInfo::isVirtualRegister(regA) &&
- MRegisterInfo::isVirtualRegister(regB) &&
- "cannot update physical register live information");
-
- // first make sure we do not have a use of a in the
- // instruction (a = b + a for example) because our
- // transformation will not work. This should never occur
- // because we are in SSA form.
- for (unsigned i = 1; i != mi->getNumOperands(); ++i)
- assert(!mi->getOperand(i).isRegister() ||
- mi->getOperand(i).getAllocatedRegNum() != (int)regA);
-
- const TargetRegisterClass* rc =MF.getSSARegMap()->getRegClass(regA);
- unsigned Added = MRI.copyRegToReg(*mbbi, mii, regA, regB, rc);
- numInstrsAdded += Added;
-
- MachineInstr* prevMi = *(mii - 1);
- DEBUG(std::cerr << "\t\tadded instruction: ";
- prevMi->print(std::cerr, TM));
-
- // update live variables for regA
- assert(Added == 1 && "Cannot handle multi-instruction copies yet!");
- LiveVariables::VarInfo& varInfo = LV.getVarInfo(regA);
- varInfo.DefInst = prevMi;
-
- // update live variables for regB
- if (LV.removeVirtualRegisterKilled(regB, &*mbbi, mi))
- LV.addVirtualRegisterKilled(regB, &*mbbi, prevMi);
-
- if (LV.removeVirtualRegisterDead(regB, &*mbbi, mi))
- LV.addVirtualRegisterDead(regB, &*mbbi, prevMi);
-
- // replace all occurences of regB with regA
- for (unsigned i = 1; i < mi->getNumOperands(); ++i) {
- if (mi->getOperand(i).isRegister() &&
- mi->getOperand(i).getReg() == regB)
- mi->SetMachineOperandReg(i, regA);
+ mi->getOperand(1).getAllocatedRegNum()) {
}
+ else {
+ MadeChange = true;
+
+ // rewrite:
+ // a = b op c
+ // to:
+ // a = b
+ // a = a op c
+ unsigned regA = mi->getOperand(0).getAllocatedRegNum();
+ unsigned regB = mi->getOperand(1).getAllocatedRegNum();
+
+ assert(MRegisterInfo::isVirtualRegister(regA) &&
+ MRegisterInfo::isVirtualRegister(regB) &&
+ "cannot update physical register live information");
+
+ // first make sure we do not have a use of a in the
+ // instruction (a = b + a for example) because our
+ // transformation will not work. This should never occur
+ // because we are in SSA form.
+ for (unsigned i = 1; i != mi->getNumOperands(); ++i)
+ assert(!mi->getOperand(i).isRegister() ||
+ mi->getOperand(i).getAllocatedRegNum() != (int)regA);
+
+ const TargetRegisterClass* rc =
+ MF.getSSARegMap()->getRegClass(regA);
+ unsigned Added = MRI.copyRegToReg(*mbbi, mii, regA, regB, rc);
+ numInstrsAdded += Added;
+
+ MachineInstr* prevMi = *(mii - 1);
+ DEBUG(std::cerr << "\t\tadded instruction: ";
+ prevMi->print(std::cerr, TM));
+
+ // update live variables for regA
+ assert(Added == 1 &&
+ "Cannot handle multi-instruction copies yet!");
+ LiveVariables::VarInfo& varInfo = LV.getVarInfo(regA);
+ varInfo.DefInst = prevMi;
+
+ // update live variables for regB
+ if (LV.removeVirtualRegisterKilled(regB, &*mbbi, mi))
+ LV.addVirtualRegisterKilled(regB, &*mbbi, prevMi);
+
+ if (LV.removeVirtualRegisterDead(regB, &*mbbi, mi))
+ LV.addVirtualRegisterDead(regB, &*mbbi, prevMi);
+
+ // replace all occurences of regB with regA
+ for (unsigned i = 1, e = mi->getNumOperands(); i != e; ++i) {
+ if (mi->getOperand(i).isRegister() &&
+ mi->getOperand(i).getReg() == regB)
+ mi->SetMachineOperandReg(i, regA);
+ }
+ }
+
+ assert(mi->getOperand(0).isDef());
+ mi->getOperand(0).setUse();
+ mi->RemoveOperand(1);
+
DEBUG(std::cerr << "\t\tmodified original to: ";
mi->print(std::cerr, TM));
- assert(mi->getOperand(0).getAllocatedRegNum() ==
- mi->getOperand(1).getAllocatedRegNum());
}
}
// immediate despite the fact that the operands are 16 or 32 bits. Because
// this can save three bytes of code size (and icache space), we want to
// shrink them if possible.
+ case X86::IMULri16: case X86::IMULri32:
+ assert(MI->getNumOperands() == 3 && "These should all have 3 operands!");
+ if (MI->getOperand(2).isImmediate()) {
+ int Val = MI->getOperand(2).getImmedValue();
+ // If the value is the same when signed extended from 8 bits...
+ if (Val == (signed int)(signed char)Val) {
+ unsigned Opcode;
+ switch (MI->getOpcode()) {
+ default: assert(0 && "Unknown opcode value!");
+ case X86::IMULri16: Opcode = X86::IMULri16b; break;
+ case X86::IMULri32: Opcode = X86::IMULri32b; break;
+ }
+ unsigned R0 = MI->getOperand(0).getReg();
+ unsigned R1 = MI->getOperand(1).getReg();
+ *I = BuildMI(Opcode, 2, R0).addReg(R1).addZImm((char)Val);
+ delete MI;
+ return true;
+ }
+ }
+ return false;
+
case X86::ADDri16: case X86::ADDri32:
case X86::SUBri16: case X86::SUBri32:
- case X86::IMULri16: case X86::IMULri32:
case X86::ANDri16: case X86::ANDri32:
case X86::ORri16: case X86::ORri32:
case X86::XORri16: case X86::XORri32:
- assert(MI->getNumOperands() == 3 && "These should all have 3 operands!");
- if (MI->getOperand(2).isImmediate()) {
- int Val = MI->getOperand(2).getImmedValue();
+ assert(MI->getNumOperands() == 2 && "These should all have 2 operands!");
+ if (MI->getOperand(1).isImmediate()) {
+ int Val = MI->getOperand(1).getImmedValue();
// If the value is the same when signed extended from 8 bits...
if (Val == (signed int)(signed char)Val) {
unsigned Opcode;
case X86::ADDri32: Opcode = X86::ADDri32b; break;
case X86::SUBri16: Opcode = X86::SUBri16b; break;
case X86::SUBri32: Opcode = X86::SUBri32b; break;
- case X86::IMULri16: Opcode = X86::IMULri16b; break;
- case X86::IMULri32: Opcode = X86::IMULri32b; break;
case X86::ANDri16: Opcode = X86::ANDri16b; break;
case X86::ANDri32: Opcode = X86::ANDri32b; break;
case X86::ORri16: Opcode = X86::ORri16b; break;
case X86::XORri32: Opcode = X86::XORri32b; break;
}
unsigned R0 = MI->getOperand(0).getReg();
- unsigned R1 = MI->getOperand(1).getReg();
- *I = BuildMI(Opcode, 2, R0).addReg(R1).addZImm((char)Val);
+ *I = BuildMI(Opcode, 1, R0, MOTy::UseAndDef).addZImm((char)Val);
delete MI;
return true;
}
return;
}
case X86II::MRMDestReg: {
- // There are two acceptable forms of MRMDestReg instructions, those with 2,
- // 3 and 4 operands:
+ // There are three forms of MRMDestReg instructions, those with 2
+ // or 3 operands:
//
- // 2 Operands: this is for things like mov that do not read a second input
+ // 2 Operands: this is for things like mov that do not read a
+ // second input.
//
- // 3 Operands: in this form, the first two registers (the destination, and
- // the first operand) should be the same, post register allocation. The 3rd
- // operand is an additional input. This should be for things like add
- // instructions.
+ // 2 Operands: two address instructions which def&use the first
+ // argument and use the second as input.
//
- // 4 Operands: This form is for instructions which are 3 operands forms, but
- // have a constant argument as well.
+ // 3 Operands: in this form, two address instructions are the same
+ // as in 2 but have a constant argument as well.
//
bool isTwoAddr = TII.isTwoAddrInstr(Opcode);
assert(MI->getOperand(0).isRegister() &&
(MI->getNumOperands() == 2 ||
- (isTwoAddr && MI->getOperand(1).isRegister() &&
- MI->getOperand(0).getReg() == MI->getOperand(1).getReg() &&
- (MI->getNumOperands() == 3 ||
- (MI->getNumOperands() == 4 && MI->getOperand(3).isImmediate()))))
+ (MI->getNumOperands() == 3 && MI->getOperand(2).isImmediate()))
&& "Bad format for MRMDestReg!");
O << TII.getName(MI->getOpCode()) << " ";
printOp(MI->getOperand(0));
O << ", ";
- printOp(MI->getOperand(1+isTwoAddr));
- if (MI->getNumOperands() == 4) {
+ printOp(MI->getOperand(1));
+ if (MI->getNumOperands() == 3) {
O << ", ";
- printOp(MI->getOperand(3));
+ printOp(MI->getOperand(2));
}
O << "\n";
return;
}
case X86II::MRMSrcReg: {
- // There are three forms that are acceptable for MRMSrcReg instructions,
- // those with 3 and 2 operands:
+ // There are three forms that are acceptable for MRMSrcReg
+ // instructions, those with 2 or 3 operands:
//
- // 3 Operands: in this form, the last register (the second input) is the
- // ModR/M input. The first two operands should be the same, post register
- // allocation. This is for things like: add r32, r/m32
+ // 2 Operands: this is for things like mov that do not read a
+ // second input.
+ //
+ // 2 Operands: in this form, the last register is the ModR/M
+ // input. The first operand is a def&use. This is for things
+ // like: add r32, r/m32
//
// 3 Operands: in this form, we can have 'INST R1, R2, imm', which is used
// for instructions like the IMULri instructions.
//
- // 2 Operands: this is for things like mov that do not read a second input
//
assert(MI->getOperand(0).isRegister() &&
MI->getOperand(1).isRegister() &&
- (MI->getNumOperands() == 2 ||
- (MI->getNumOperands() == 3 &&
- (MI->getOperand(2).isRegister() ||
- MI->getOperand(2).isImmediate())))
+ (MI->getNumOperands() == 2 ||
+ (MI->getNumOperands() == 3 &&
+ (MI->getOperand(2).isImmediate())))
&& "Bad format for MRMSrcReg!");
- if (MI->getNumOperands() == 3 && !MI->getOperand(2).isImmediate() &&
- MI->getOperand(0).getReg() != MI->getOperand(1).getReg())
- O << "**";
O << TII.getName(MI->getOpCode()) << " ";
printOp(MI->getOperand(0));
-
- // If this is IMULri* instructions, print the non-two-address operand.
- if (MI->getNumOperands() == 3 && MI->getOperand(2).isImmediate()) {
- O << ", ";
- printOp(MI->getOperand(1));
- }
-
O << ", ";
- printOp(MI->getOperand(MI->getNumOperands()-1));
+ printOp(MI->getOperand(1));
+ if (MI->getNumOperands() == 3) {
+ O << ", ";
+ printOp(MI->getOperand(2));
+ }
O << "\n";
return;
}
(MI->getNumOperands() == 1+4 && isMem(MI, 1)) ||
(MI->getNumOperands() == 2+4 && MI->getOperand(1).isRegister() &&
isMem(MI, 2))
- && "Bad format for MRMDestReg!");
+ && "Bad format for MRMSrcMem!");
if (MI->getNumOperands() == 2+4 &&
MI->getOperand(0).getReg() != MI->getOperand(1).getReg())
O << "**";
return;
}
case X86II::MRMDestReg: {
- // There are two acceptable forms of MRMDestReg instructions, those with 2,
- // 3 and 4 operands:
+ // There are three forms of MRMDestReg instructions, those with 2
+ // or 3 operands:
//
- // 2 Operands: this is for things like mov that do not read a second input
+ // 2 Operands: this is for things like mov that do not read a
+ // second input.
//
- // 3 Operands: in this form, the first two registers (the destination, and
- // the first operand) should be the same, post register allocation. The 3rd
- // operand is an additional input. This should be for things like add
- // instructions.
+ // 2 Operands: two address instructions which def&use the first
+ // argument and use the second as input.
//
- // 4 Operands: This form is for instructions which are 3 operands forms, but
- // have a constant argument as well.
+ // 3 Operands: in this form, two address instructions are the same
+ // as in 2 but have a constant argument as well.
//
bool isTwoAddr = TII.isTwoAddrInstr(Opcode);
assert(MI->getOperand(0).isRegister() &&
(MI->getNumOperands() == 2 ||
- (isTwoAddr && MI->getOperand(1).isRegister() &&
- MI->getOperand(0).getReg() == MI->getOperand(1).getReg() &&
- (MI->getNumOperands() == 3 ||
- (MI->getNumOperands() == 4 && MI->getOperand(3).isImmediate()))))
+ (MI->getNumOperands() == 3 && MI->getOperand(2).isImmediate()))
&& "Bad format for MRMDestReg!");
O << TII.getName(MI->getOpCode()) << " ";
printOp(MI->getOperand(0));
O << ", ";
- printOp(MI->getOperand(1+isTwoAddr));
- if (MI->getNumOperands() == 4) {
+ printOp(MI->getOperand(1));
+ if (MI->getNumOperands() == 3) {
O << ", ";
- printOp(MI->getOperand(3));
+ printOp(MI->getOperand(2));
}
O << "\n";
return;
}
case X86II::MRMSrcReg: {
- // There are three forms that are acceptable for MRMSrcReg instructions,
- // those with 3 and 2 operands:
+ // There are three forms that are acceptable for MRMSrcReg
+ // instructions, those with 2 or 3 operands:
//
- // 3 Operands: in this form, the last register (the second input) is the
- // ModR/M input. The first two operands should be the same, post register
- // allocation. This is for things like: add r32, r/m32
+ // 2 Operands: this is for things like mov that do not read a
+ // second input.
+ //
+ // 2 Operands: in this form, the last register is the ModR/M
+ // input. The first operand is a def&use. This is for things
+ // like: add r32, r/m32
//
// 3 Operands: in this form, we can have 'INST R1, R2, imm', which is used
// for instructions like the IMULri instructions.
//
- // 2 Operands: this is for things like mov that do not read a second input
//
assert(MI->getOperand(0).isRegister() &&
MI->getOperand(1).isRegister() &&
- (MI->getNumOperands() == 2 ||
- (MI->getNumOperands() == 3 &&
- (MI->getOperand(2).isRegister() ||
- MI->getOperand(2).isImmediate())))
+ (MI->getNumOperands() == 2 ||
+ (MI->getNumOperands() == 3 &&
+ (MI->getOperand(2).isImmediate())))
&& "Bad format for MRMSrcReg!");
- if (MI->getNumOperands() == 3 && !MI->getOperand(2).isImmediate() &&
- MI->getOperand(0).getReg() != MI->getOperand(1).getReg())
- O << "**";
O << TII.getName(MI->getOpCode()) << " ";
printOp(MI->getOperand(0));
-
- // If this is IMULri* instructions, print the non-two-address operand.
- if (MI->getNumOperands() == 3 && MI->getOperand(2).isImmediate()) {
- O << ", ";
- printOp(MI->getOperand(1));
- }
-
O << ", ";
- printOp(MI->getOperand(MI->getNumOperands()-1));
+ printOp(MI->getOperand(1));
+ if (MI->getNumOperands() == 3) {
+ O << ", ";
+ printOp(MI->getOperand(2));
+ }
O << "\n";
return;
}
(MI->getNumOperands() == 1+4 && isMem(MI, 1)) ||
(MI->getNumOperands() == 2+4 && MI->getOperand(1).isRegister() &&
isMem(MI, 2))
- && "Bad format for MRMDestReg!");
+ && "Bad format for MRMSrcMem!");
if (MI->getNumOperands() == 2+4 &&
MI->getOperand(0).getReg() != MI->getOperand(1).getReg())
O << "**";
case X86II::MRMDestReg: {
MCE.emitByte(BaseOpcode);
- MachineOperand &SrcOp = MI.getOperand(1+II->isTwoAddrInstr(Opcode));
- emitRegModRMByte(MI.getOperand(0).getReg(), getX86RegNum(SrcOp.getReg()));
- if (MI.getNumOperands() == 4)
- emitConstant(MI.getOperand(3).getImmedValue(), sizeOfPtr(Desc));
+ emitRegModRMByte(MI.getOperand(0).getReg(),
+ getX86RegNum(MI.getOperand(1).getReg()));
+ if (MI.getNumOperands() == 3)
+ emitConstant(MI.getOperand(2).getImmedValue(), sizeOfPtr(Desc));
break;
}
case X86II::MRMDestMem:
case X86II::MRMSrcReg:
MCE.emitByte(BaseOpcode);
- if (MI.getNumOperands() == 2) {
- emitRegModRMByte(MI.getOperand(MI.getNumOperands()-1).getReg(),
- getX86RegNum(MI.getOperand(0).getReg()));
- } else if (MI.getOperand(2).isImmediate()) {
- emitRegModRMByte(MI.getOperand(1).getReg(),
- getX86RegNum(MI.getOperand(0).getReg()));
-
+ emitRegModRMByte(MI.getOperand(1).getReg(),
+ getX86RegNum(MI.getOperand(0).getReg()));
+ if (MI.getNumOperands() == 3)
emitConstant(MI.getOperand(2).getImmedValue(), sizeOfPtr(Desc));
- } else {
- emitRegModRMByte(MI.getOperand(2).getReg(),
- getX86RegNum(MI.getOperand(0).getReg()));
- }
break;
case X86II::MRMSrcMem:
// immediate despite the fact that the operands are 16 or 32 bits. Because
// this can save three bytes of code size (and icache space), we want to
// shrink them if possible.
+ case X86::IMULri16: case X86::IMULri32:
+ assert(MI->getNumOperands() == 3 && "These should all have 3 operands!");
+ if (MI->getOperand(2).isImmediate()) {
+ int Val = MI->getOperand(2).getImmedValue();
+ // If the value is the same when signed extended from 8 bits...
+ if (Val == (signed int)(signed char)Val) {
+ unsigned Opcode;
+ switch (MI->getOpcode()) {
+ default: assert(0 && "Unknown opcode value!");
+ case X86::IMULri16: Opcode = X86::IMULri16b; break;
+ case X86::IMULri32: Opcode = X86::IMULri32b; break;
+ }
+ unsigned R0 = MI->getOperand(0).getReg();
+ unsigned R1 = MI->getOperand(1).getReg();
+ *I = BuildMI(Opcode, 2, R0).addReg(R1).addZImm((char)Val);
+ delete MI;
+ return true;
+ }
+ }
+ return false;
+
case X86::ADDri16: case X86::ADDri32:
case X86::SUBri16: case X86::SUBri32:
- case X86::IMULri16: case X86::IMULri32:
case X86::ANDri16: case X86::ANDri32:
case X86::ORri16: case X86::ORri32:
case X86::XORri16: case X86::XORri32:
- assert(MI->getNumOperands() == 3 && "These should all have 3 operands!");
- if (MI->getOperand(2).isImmediate()) {
- int Val = MI->getOperand(2).getImmedValue();
+ assert(MI->getNumOperands() == 2 && "These should all have 2 operands!");
+ if (MI->getOperand(1).isImmediate()) {
+ int Val = MI->getOperand(1).getImmedValue();
// If the value is the same when signed extended from 8 bits...
if (Val == (signed int)(signed char)Val) {
unsigned Opcode;
case X86::ADDri32: Opcode = X86::ADDri32b; break;
case X86::SUBri16: Opcode = X86::SUBri16b; break;
case X86::SUBri32: Opcode = X86::SUBri32b; break;
- case X86::IMULri16: Opcode = X86::IMULri16b; break;
- case X86::IMULri32: Opcode = X86::IMULri32b; break;
case X86::ANDri16: Opcode = X86::ANDri16b; break;
case X86::ANDri32: Opcode = X86::ANDri32b; break;
case X86::ORri16: Opcode = X86::ORri16b; break;
case X86::XORri32: Opcode = X86::XORri32b; break;
}
unsigned R0 = MI->getOperand(0).getReg();
- unsigned R1 = MI->getOperand(1).getReg();
- *I = BuildMI(Opcode, 2, R0).addReg(R1).addZImm((char)Val);
+ *I = BuildMI(Opcode, 1, R0, MOTy::UseAndDef).addZImm((char)Val);
delete MI;
return true;
}
Amount = (Amount+Align-1)/Align*Align;
if (Old->getOpcode() == X86::ADJCALLSTACKDOWN) {
- New=BuildMI(X86::SUBri32, 2, X86::ESP).addReg(X86::ESP).addZImm(Amount);
+ New=BuildMI(X86::SUBri32, 1, X86::ESP, MOTy::UseAndDef).addZImm(Amount);
} else {
assert(Old->getOpcode() == X86::ADJCALLSTACKUP);
- New=BuildMI(X86::ADDri32, 2, X86::ESP).addReg(X86::ESP).addZImm(Amount);
+ New=BuildMI(X86::ADDri32, 1, X86::ESP, MOTy::UseAndDef).addZImm(Amount);
}
}
}
int EBPOffset = MFI->getObjectOffset(MFI->getObjectIndexEnd()-1)+4;
if (NumBytes) { // adjust stack pointer: ESP -= numbytes
- MI= BuildMI(X86::SUBri32, 2, X86::ESP).addReg(X86::ESP).addZImm(NumBytes);
+ MI= BuildMI(X86::SUBri32, 1, X86::ESP, MOTy::UseAndDef).addZImm(NumBytes);
MBBI = MBB.insert(MBBI, MI)+1;
}
if (NumBytes) {
// adjust stack pointer: ESP -= numbytes
- MI= BuildMI(X86::SUBri32, 2, X86::ESP).addReg(X86::ESP).addZImm(NumBytes);
+ MI= BuildMI(X86::SUBri32, 1, X86::ESP, MOTy::UseAndDef).addZImm(NumBytes);
MBB.insert(MBBI, MI);
}
}
unsigned NumBytes = MFI->getStackSize();
if (NumBytes) { // adjust stack pointer back: ESP += numbytes
- MI =BuildMI(X86::ADDri32, 2, X86::ESP).addReg(X86::ESP).addZImm(NumBytes);
+ MI =BuildMI(X86::ADDri32, 1, X86::ESP, MOTy::UseAndDef).addZImm(NumBytes);
MBBI = 1+MBB.insert(MBBI, MI);
}
}
projects / oota-llvm.git / commitdiff