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Remove many calls to TII::isMoveInstr. Targets should be producing COPY anyway.

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TII::isMoveInstr is going tobe completely removed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108507 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2010-07-16 04:45:42 +00:00
parent 18c479c600
commit 04c528a0c8
15 changed files with 74 additions and 228 deletions
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34
lib/CodeGen/MachineCSE.cpp
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@ -107,29 +107,9 @@ bool MachineCSE::PerformTrivialCoalescing(MachineInstr *MI,
MachineInstr *DefMI = MRI->getVRegDef(Reg);
if (DefMI->getParent() != MBB)
continue;
unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
if (TII->isMoveInstr(*DefMI, SrcReg, DstReg, SrcSubIdx, DstSubIdx) &&
TargetRegisterInfo::isVirtualRegister(SrcReg) &&
!SrcSubIdx && !DstSubIdx) {
const TargetRegisterClass *SRC = MRI->getRegClass(SrcReg);
const TargetRegisterClass *RC = MRI->getRegClass(Reg);
const TargetRegisterClass *NewRC = getCommonSubClass(RC, SRC);
if (!NewRC)
continue;
DEBUG(dbgs() << "Coalescing: " << *DefMI);
DEBUG(dbgs() << "*** to: " << *MI);
MO.setReg(SrcReg);
MRI->clearKillFlags(SrcReg);
if (NewRC != SRC)
MRI->setRegClass(SrcReg, NewRC);
DefMI->eraseFromParent();
++NumCoalesces;
Changed = true;
}
if (!DefMI->isCopy())
continue;
SrcReg = DefMI->getOperand(1).getReg();
unsigned SrcReg = DefMI->getOperand(1).getReg();
if (!TargetRegisterInfo::isVirtualRegister(SrcReg))
continue;
if (DefMI->getOperand(0).getSubReg() || DefMI->getOperand(1).getSubReg())
@ -261,19 +241,13 @@ bool MachineCSE::PhysRegDefReaches(MachineInstr *CSMI, MachineInstr *MI,
return false;
}
static bool isCopy(const MachineInstr *MI, const TargetInstrInfo *TII) {
unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
return MI->isCopyLike() ||
TII->isMoveInstr(*MI, SrcReg, DstReg, SrcSubIdx, DstSubIdx);
}
bool MachineCSE::isCSECandidate(MachineInstr *MI) {
if (MI->isLabel() || MI->isPHI() || MI->isImplicitDef() ||
MI->isKill() || MI->isInlineAsm() || MI->isDebugValue())
return false;
// Ignore copies.
if (isCopy(MI, TII))
if (MI->isCopyLike())
return false;
// Ignore stuff that we obviously can't move.
@ -329,7 +303,7 @@ bool MachineCSE::isProfitableToCSE(unsigned CSReg, unsigned Reg,
E = MRI->use_nodbg_end(); I != E; ++I) {
MachineInstr *Use = &*I;
// Ignore copies.
if (!isCopy(Use, TII)) {
if (!Use->isCopyLike()) {
HasNonCopyUse = true;
break;
}
@ -385,7 +359,7 @@ bool MachineCSE::ProcessBlock(MachineBasicBlock *MBB) {
// Look for trivial copy coalescing opportunities.
if (PerformTrivialCoalescing(MI, MBB)) {
// After coalescing MI itself may become a copy.
if (isCopy(MI, TII))
if (MI->isCopyLike())
continue;
FoundCSE = VNT.count(MI);
}