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Rewrite chained if's as switches and replace assertions with llvm_unreachable

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(as suggested in radar 8104405).

llvm-svn: 106318
This commit is contained in:
Bob Wilson 2010-06-18 21:32:42 +00:00
parent 3f9da2755d
commit e77d313369
1 changed files with 55 additions and 35 deletions
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90
lib/Target/ARM/ARMBaseInstrInfo.cpp
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@ -801,23 +801,27 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
if (RC == ARM::tGPRRegisterClass || RC == ARM::tcGPRRegisterClass)
RC = ARM::GPRRegisterClass;
if (RC == ARM::GPRRegisterClass) {
switch (RC->getID()) {
case ARM::GPRRegClassID:
AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::STR))
.addReg(SrcReg, getKillRegState(isKill))
.addFrameIndex(FI).addReg(0).addImm(0).addMemOperand(MMO));
} else if (RC == ARM::SPRRegisterClass) {
break;
case ARM::SPRRegClassID:
AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VSTRS))
.addReg(SrcReg, getKillRegState(isKill))
.addFrameIndex(FI).addImm(0).addMemOperand(MMO));
} else if (RC == ARM::DPRRegisterClass ||
RC == ARM::DPR_VFP2RegisterClass ||
RC == ARM::DPR_8RegisterClass) {
break;
case ARM::DPRRegClassID:
case ARM::DPR_VFP2RegClassID:
case ARM::DPR_8RegClassID:
AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VSTRD))
.addReg(SrcReg, getKillRegState(isKill))
.addFrameIndex(FI).addImm(0).addMemOperand(MMO));
} else if (RC == ARM::QPRRegisterClass ||
RC == ARM::QPR_VFP2RegisterClass ||
RC == ARM::QPR_8RegisterClass) {
break;
case ARM::QPRRegClassID:
case ARM::QPR_VFP2RegClassID:
case ARM::QPR_8RegClassID:
// FIXME: Neon instructions should support predicates
if (Align >= 16 && getRegisterInfo().canRealignStack(MF)) {
AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VST1q))
@ -831,7 +835,9 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
.addImm(ARM_AM::getAM5Opc(ARM_AM::ia, 4))
.addMemOperand(MMO));
}
} else if (RC == ARM::QQPRRegisterClass || RC == ARM::QQPR_VFP2RegisterClass){
break;
case ARM::QQPRRegClassID:
case ARM::QQPR_VFP2RegClassID:
if (Align >= 16 && getRegisterInfo().canRealignStack(MF)) {
// FIXME: It's possible to only store part of the QQ register if the
// spilled def has a sub-register index.
@ -853,8 +859,8 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
MIB = AddDReg(MIB, SrcReg, ARM::dsub_2, 0, TRI);
AddDReg(MIB, SrcReg, ARM::dsub_3, 0, TRI);
}
} else {
assert(RC == ARM::QQQQPRRegisterClass && "Unknown regclass!");
break;
case ARM::QQQQPRRegClassID: {
MachineInstrBuilder MIB =
AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VSTMD))
.addFrameIndex(FI)
@ -868,6 +874,10 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
MIB = AddDReg(MIB, SrcReg, ARM::dsub_5, 0, TRI);
MIB = AddDReg(MIB, SrcReg, ARM::dsub_6, 0, TRI);
AddDReg(MIB, SrcReg, ARM::dsub_7, 0, TRI);
break;
}
default:
llvm_unreachable("Unknown regclass!");
}
}
@ -892,20 +902,24 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
if (RC == ARM::tGPRRegisterClass || RC == ARM::tcGPRRegisterClass)
RC = ARM::GPRRegisterClass;
if (RC == ARM::GPRRegisterClass) {
switch (RC->getID()) {
case ARM::GPRRegClassID:
AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::LDR), DestReg)
.addFrameIndex(FI).addReg(0).addImm(0).addMemOperand(MMO));
} else if (RC == ARM::SPRRegisterClass) {
break;
case ARM::SPRRegClassID:
AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VLDRS), DestReg)
.addFrameIndex(FI).addImm(0).addMemOperand(MMO));
} else if (RC == ARM::DPRRegisterClass ||
RC == ARM::DPR_VFP2RegisterClass ||
RC == ARM::DPR_8RegisterClass) {
break;
case ARM::DPRRegClassID:
case ARM::DPR_VFP2RegClassID:
case ARM::DPR_8RegClassID:
AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VLDRD), DestReg)
.addFrameIndex(FI).addImm(0).addMemOperand(MMO));
} else if (RC == ARM::QPRRegisterClass ||
RC == ARM::QPR_VFP2RegisterClass ||
RC == ARM::QPR_8RegisterClass) {
break;
case ARM::QPRRegClassID:
case ARM::QPR_VFP2RegClassID:
case ARM::QPR_8RegClassID:
if (Align >= 16 && getRegisterInfo().canRealignStack(MF)) {
AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VLD1q), DestReg)
.addFrameIndex(FI).addImm(128)
@ -916,7 +930,9 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
.addImm(ARM_AM::getAM5Opc(ARM_AM::ia, 4))
.addMemOperand(MMO));
}
} else if (RC == ARM::QQPRRegisterClass || RC == ARM::QQPR_VFP2RegisterClass){
break;
case ARM::QQPRRegClassID:
case ARM::QQPR_VFP2RegClassID:
if (Align >= 16 && getRegisterInfo().canRealignStack(MF)) {
MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(ARM::VLD2q32));
MIB = AddDReg(MIB, DestReg, ARM::dsub_0, RegState::Define, TRI);
@ -935,21 +951,25 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
MIB = AddDReg(MIB, DestReg, ARM::dsub_2, RegState::Define, TRI);
AddDReg(MIB, DestReg, ARM::dsub_3, RegState::Define, TRI);
}
} else {
assert(RC == ARM::QQQQPRRegisterClass && "Unknown regclass!");
MachineInstrBuilder MIB =
AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VLDMD))
.addFrameIndex(FI)
.addImm(ARM_AM::getAM5Opc(ARM_AM::ia, 4)))
.addMemOperand(MMO);
MIB = AddDReg(MIB, DestReg, ARM::dsub_0, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_1, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_2, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_3, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_4, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_5, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_6, RegState::Define, TRI);
AddDReg(MIB, DestReg, ARM::dsub_7, RegState::Define, TRI);
break;
case ARM::QQQQPRRegClassID: {
MachineInstrBuilder MIB =
AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VLDMD))
.addFrameIndex(FI)
.addImm(ARM_AM::getAM5Opc(ARM_AM::ia, 4)))
.addMemOperand(MMO);
MIB = AddDReg(MIB, DestReg, ARM::dsub_0, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_1, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_2, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_3, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_4, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_5, RegState::Define, TRI);
MIB = AddDReg(MIB, DestReg, ARM::dsub_6, RegState::Define, TRI);
AddDReg(MIB, DestReg, ARM::dsub_7, RegState::Define, TRI);
break;
}
default:
llvm_unreachable("Unknown regclass!");
}
}