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Tidy up. No functional changes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98398 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson 2010-03-12 22:50:09 +00:00
parent f08fde41f3
commit e4193b20fd
1 changed files with 16 additions and 15 deletions
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31
lib/Target/ARM/ARMLoadStoreOptimizer.cpp
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@ -474,8 +474,8 @@ bool ARMLoadStoreOpt::MergeBaseUpdateLSMultiple(MachineBasicBlock &MBB,
unsigned PredReg = 0;
ARMCC::CondCodes Pred = llvm::getInstrPredicate(MI, PredReg);
int Opcode = MI->getOpcode();
bool isAM4 = Opcode == ARM::LDM || Opcode == ARM::t2LDM ||
Opcode == ARM::STM || Opcode == ARM::t2STM;
bool isAM4 = (Opcode == ARM::LDM || Opcode == ARM::t2LDM ||
Opcode == ARM::STM || Opcode == ARM::t2STM);
if (isAM4) {
if (ARM_AM::getAM4WBFlag(MI->getOperand(1).getImm()))
@ -624,14 +624,14 @@ bool ARMLoadStoreOpt::MergeBaseUpdateLoadStore(MachineBasicBlock &MBB,
unsigned Bytes = getLSMultipleTransferSize(MI);
int Opcode = MI->getOpcode();
DebugLoc dl = MI->getDebugLoc();
bool isAM5 = Opcode == ARM::VLDRD || Opcode == ARM::VLDRS ||
Opcode == ARM::VSTRD || Opcode == ARM::VSTRS;
bool isAM2 = Opcode == ARM::LDR || Opcode == ARM::STR;
bool isAM5 = (Opcode == ARM::VLDRD || Opcode == ARM::VLDRS ||
Opcode == ARM::VSTRD || Opcode == ARM::VSTRS);
bool isAM2 = (Opcode == ARM::LDR || Opcode == ARM::STR);
if (isAM2 && ARM_AM::getAM2Offset(MI->getOperand(3).getImm()) != 0)
return false;
else if (isAM5 && ARM_AM::getAM5Offset(MI->getOperand(2).getImm()) != 0)
if (isAM5 && ARM_AM::getAM5Offset(MI->getOperand(2).getImm()) != 0)
return false;
else if (isT2i32Load(Opcode) || isT2i32Store(Opcode))
if (isT2i32Load(Opcode) || isT2i32Store(Opcode))
if (MI->getOperand(2).getImm() != 0)
return false;
@ -648,33 +648,35 @@ bool ARMLoadStoreOpt::MergeBaseUpdateLoadStore(MachineBasicBlock &MBB,
unsigned NewOpc = 0;
// AM2 - 12 bits, thumb2 - 8 bits.
unsigned Limit = isAM5 ? 0 : (isAM2 ? 0x1000 : 0x100);
// Try merging with the previous instruction.
if (MBBI != MBB.begin()) {
MachineBasicBlock::iterator PrevMBBI = prior(MBBI);
if (isMatchingDecrement(PrevMBBI, Base, Bytes, Limit, Pred, PredReg)) {
DoMerge = true;
AddSub = ARM_AM::sub;
NewOpc = getPreIndexedLoadStoreOpcode(Opcode);
} else if (!isAM5 &&
isMatchingIncrement(PrevMBBI, Base, Bytes, Limit,Pred,PredReg)) {
DoMerge = true;
NewOpc = getPreIndexedLoadStoreOpcode(Opcode);
}
if (DoMerge)
if (DoMerge) {
NewOpc = getPreIndexedLoadStoreOpcode(Opcode);
MBB.erase(PrevMBBI);
}
}
// Try merging with the next instruction.
if (!DoMerge && MBBI != MBB.end()) {
MachineBasicBlock::iterator NextMBBI = llvm::next(MBBI);
if (!isAM5 &&
isMatchingDecrement(NextMBBI, Base, Bytes, Limit, Pred, PredReg)) {
DoMerge = true;
AddSub = ARM_AM::sub;
NewOpc = getPostIndexedLoadStoreOpcode(Opcode);
} else if (isMatchingIncrement(NextMBBI, Base, Bytes, Limit,Pred,PredReg)) {
DoMerge = true;
NewOpc = getPostIndexedLoadStoreOpcode(Opcode);
}
if (DoMerge) {
NewOpc = getPostIndexedLoadStoreOpcode(Opcode);
if (NextMBBI == I) {
Advance = true;
++I;
@ -689,9 +691,8 @@ bool ARMLoadStoreOpt::MergeBaseUpdateLoadStore(MachineBasicBlock &MBB,
bool isDPR = NewOpc == ARM::VLDMD || NewOpc == ARM::VSTMD;
unsigned Offset = 0;
if (isAM5)
Offset = ARM_AM::getAM5Opc((AddSub == ARM_AM::sub)
? ARM_AM::db
: ARM_AM::ia, true, (isDPR ? 2 : 1));
Offset = ARM_AM::getAM5Opc(AddSub == ARM_AM::sub ? ARM_AM::db : ARM_AM::ia,
true, (isDPR ? 2 : 1));
else if (isAM2)
Offset = ARM_AM::getAM2Opc(AddSub, Bytes, ARM_AM::no_shift);
else