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Switch some getAliasSet clients to MCRegAliasIterator.

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MCRegAliasIterator can optionally visit the register itself, allowing
for simpler code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157837 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-06-01 20:36:54 +00:00
parent 73c2f7f5ed
commit f152fe8d48
8 changed files with 46 additions and 99 deletions
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50
lib/CodeGen/CriticalAntiDepBreaker.cpp
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@@ -62,17 +62,11 @@ void CriticalAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
// In a return block, examine the function live-out regs.
for (MachineRegisterInfo::liveout_iterator I = MRI.liveout_begin(),
E = MRI.liveout_end(); I != E; ++I) {
unsigned Reg = *I;
Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[Reg] = BBSize;
DefIndices[Reg] = ~0u;
// Repeat, for all aliases.
for (const uint16_t *Alias = TRI->getAliasSet(Reg); *Alias; ++Alias) {
unsigned AliasReg = *Alias;
Classes[AliasReg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[AliasReg] = BBSize;
DefIndices[AliasReg] = ~0u;
for (MCRegAliasIterator AI(*I, TRI, true); AI.isValid(); ++AI) {
unsigned Reg = *AI;
Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[Reg] = BBSize;
DefIndices[Reg] = ~0u;
}
}
}
@@ -84,17 +78,11 @@ void CriticalAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
SE = BB->succ_end(); SI != SE; ++SI)
for (MachineBasicBlock::livein_iterator I = (*SI)->livein_begin(),
E = (*SI)->livein_end(); I != E; ++I) {
unsigned Reg = *I;
Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[Reg] = BBSize;
DefIndices[Reg] = ~0u;
// Repeat, for all aliases.
for (const uint16_t *Alias = TRI->getAliasSet(Reg); *Alias; ++Alias) {
unsigned AliasReg = *Alias;
Classes[AliasReg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[AliasReg] = BBSize;
DefIndices[AliasReg] = ~0u;
for (MCRegAliasIterator AI(*I, TRI, true); AI.isValid(); ++AI) {
unsigned Reg = *AI;
Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[Reg] = BBSize;
DefIndices[Reg] = ~0u;
}
}
@@ -104,18 +92,12 @@ void CriticalAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
const MachineFrameInfo *MFI = MF.getFrameInfo();
BitVector Pristine = MFI->getPristineRegs(BB);
for (const uint16_t *I = TRI->getCalleeSavedRegs(&MF); *I; ++I) {
unsigned Reg = *I;
if (!IsReturnBlock && !Pristine.test(Reg)) continue;
Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[Reg] = BBSize;
DefIndices[Reg] = ~0u;
// Repeat, for all aliases.
for (const uint16_t *Alias = TRI->getAliasSet(Reg); *Alias; ++Alias) {
unsigned AliasReg = *Alias;
Classes[AliasReg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[AliasReg] = BBSize;
DefIndices[AliasReg] = ~0u;
if (!IsReturnBlock && !Pristine.test(*I)) continue;
for (MCRegAliasIterator AI(*I, TRI, true); AI.isValid(); ++AI) {
unsigned Reg = *AI;
Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[Reg] = BBSize;
DefIndices[Reg] = ~0u;
}
}
}