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Fix a regression from 76124. Thumb1 instructions default to S bit being true.

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llvm-svn: 76374
This commit is contained in:
Evan Cheng 2009-07-19 19:16:46 +00:00
parent 96f9a917c8
commit fd384e9493
2 changed files with 19 additions and 13 deletions
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5
lib/Target/ARM/ARMBaseInstrInfo.h
View File

@ -198,6 +198,11 @@ const MachineInstrBuilder &AddDefaultCC(const MachineInstrBuilder &MIB) {
return MIB.addReg(0);
}
static inline
const MachineInstrBuilder &AddDefaultT1CC(const MachineInstrBuilder &MIB) {
return MIB.addReg(ARM::CPSR);
}
class ARMBaseInstrInfo : public TargetInstrInfoImpl {
protected:
// Can be only subclassed.

27
lib/Target/ARM/Thumb1RegisterInfo.cpp
View File

@ -133,12 +133,12 @@ void emitThumbRegPlusImmInReg(MachineBasicBlock &MBB,
}
if (NumBytes <= 255 && NumBytes >= 0)
AddDefaultCC(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVi8), LdReg))
AddDefaultT1CC(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVi8), LdReg))
.addImm(NumBytes);
else if (NumBytes < 0 && NumBytes >= -255) {
AddDefaultCC(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVi8), LdReg))
AddDefaultT1CC(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVi8), LdReg))
.addImm(NumBytes);
AddDefaultCC(BuildMI(MBB, MBBI, dl, TII.get(ARM::tRSB), LdReg))
AddDefaultT1CC(BuildMI(MBB, MBBI, dl, TII.get(ARM::tRSB), LdReg))
.addReg(LdReg, RegState::Kill);
} else
MRI.emitLoadConstPool(MBB, MBBI, dl, LdReg, 0, NumBytes);
@ -148,7 +148,7 @@ void emitThumbRegPlusImmInReg(MachineBasicBlock &MBB,
MachineInstrBuilder MIB =
BuildMI(MBB, MBBI, dl, TII.get(Opc), DestReg);
if (Opc != ARM::tADDhirr)
MIB = AddDefaultCC(MIB);
MIB = AddDefaultT1CC(MIB);
if (DestReg == ARM::SP || isSub)
MIB.addReg(BaseReg).addReg(LdReg, RegState::Kill);
else
@ -254,7 +254,7 @@ void emitThumbRegPlusImmediate(MachineBasicBlock &MBB,
Bytes -= ThisVal;
const TargetInstrDesc &TID = TII.get(isSub ? ARM::tSUBi3 : ARM::tADDi3);
const MachineInstrBuilder MIB =
AddDefaultCC(BuildMI(MBB, MBBI, dl, TID, DestReg));
AddDefaultT1CC(BuildMI(MBB, MBBI, dl, TID, DestReg));
AddDefaultPred(MIB.addReg(BaseReg, RegState::Kill).addImm(ThisVal));
} else {
BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVr), DestReg)
@ -272,7 +272,7 @@ void emitThumbRegPlusImmediate(MachineBasicBlock &MBB,
if (isTwoAddr) {
MachineInstrBuilder MIB = BuildMI(MBB, MBBI, dl, TII.get(Opc), DestReg);
if (NeedCC)
MIB = AddDefaultCC(MIB);
MIB = AddDefaultT1CC(MIB);
MIB .addReg(DestReg).addImm(ThisVal);
if (NeedPred)
MIB = AddDefaultPred(MIB);
@ -281,7 +281,7 @@ void emitThumbRegPlusImmediate(MachineBasicBlock &MBB,
bool isKill = BaseReg != ARM::SP;
MachineInstrBuilder MIB = BuildMI(MBB, MBBI, dl, TII.get(Opc), DestReg);
if (NeedCC)
MIB = AddDefaultCC(MIB);
MIB = AddDefaultT1CC(MIB);
MIB.addReg(BaseReg, getKillRegState(isKill)).addImm(ThisVal);
if (NeedPred)
MIB = AddDefaultPred(MIB);
@ -302,7 +302,7 @@ void emitThumbRegPlusImmediate(MachineBasicBlock &MBB,
if (ExtraOpc) {
const TargetInstrDesc &TID = TII.get(ExtraOpc);
AddDefaultPred(AddDefaultCC(BuildMI(MBB, MBBI, dl, TID, DestReg))
AddDefaultPred(AddDefaultT1CC(BuildMI(MBB, MBBI, dl, TID, DestReg))
.addReg(DestReg, RegState::Kill)
.addImm(((unsigned)NumBytes) & 3));
}
@ -361,14 +361,14 @@ static void emitThumbConstant(MachineBasicBlock &MBB,
int Chunk = (1 << 8) - 1;
int ThisVal = (Imm > Chunk) ? Chunk : Imm;
Imm -= ThisVal;
AddDefaultPred(AddDefaultCC(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVi8),
DestReg))
AddDefaultPred(AddDefaultT1CC(BuildMI(MBB, MBBI, dl, TII.get(ARM::tMOVi8),
DestReg))
.addImm(ThisVal));
if (Imm > 0)
emitThumbRegPlusImmediate(MBB, MBBI, DestReg, DestReg, Imm, TII, MRI, dl);
if (isSub) {
const TargetInstrDesc &TID = TII.get(ARM::tRSB);
AddDefaultPred(AddDefaultCC(BuildMI(MBB, MBBI, dl, TID, DestReg))
AddDefaultPred(AddDefaultT1CC(BuildMI(MBB, MBBI, dl, TID, DestReg))
.addReg(DestReg, RegState::Kill));
}
}
@ -446,7 +446,8 @@ void Thumb1RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
if (Opcode == ARM::tADDi3) {
removeOperands(MI, i);
MachineInstrBuilder MIB(&MI);
AddDefaultPred(AddDefaultCC(MIB).addReg(FrameReg).addImm(Offset/Scale));
AddDefaultPred(AddDefaultT1CC(MIB).addReg(FrameReg)
.addImm(Offset/Scale));
} else {
MI.getOperand(i).ChangeToRegister(FrameReg, false);
MI.getOperand(i+1).ChangeToImmediate(Offset / Scale);
@ -473,7 +474,7 @@ void Thumb1RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
if (Opcode == ARM::tADDi3) {
removeOperands(MI, i);
MachineInstrBuilder MIB(&MI);
AddDefaultPred(AddDefaultCC(MIB).addReg(FrameReg).addImm(Mask));
AddDefaultPred(AddDefaultT1CC(MIB).addReg(FrameReg).addImm(Mask));
} else {
MI.getOperand(i).ChangeToRegister(FrameReg, false);
MI.getOperand(i+1).ChangeToImmediate(Mask);