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Fix a couple of places where changes are made but not tracked.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129287 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2011-04-11 18:47:20 +00:00
parent e679d3331b
commit cfea985f53
2 changed files with 10 additions and 3 deletions
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8
lib/CodeGen/MachineCSE.cpp
View File

@ -365,6 +365,8 @@ bool MachineCSE::ProcessBlock(MachineBasicBlock *MBB) {
if (!FoundCSE) {
// Look for trivial copy coalescing opportunities.
if (PerformTrivialCoalescing(MI, MBB)) {
Changed = true;
// After coalescing MI itself may become a copy.
if (MI->isCopyLike())
continue;
@ -379,10 +381,11 @@ bool MachineCSE::ProcessBlock(MachineBasicBlock *MBB) {
if (NewMI) {
Commuted = true;
FoundCSE = VNT.count(NewMI);
if (NewMI != MI)
if (NewMI != MI) {
// New instruction. It doesn't need to be kept.
NewMI->eraseFromParent();
else if (!FoundCSE)
Changed = true;
} else if (!FoundCSE)
// MI was changed but it didn't help, commute it back!
(void)TII->commuteInstruction(MI);
}
@ -450,6 +453,7 @@ bool MachineCSE::ProcessBlock(MachineBasicBlock *MBB) {
++NumPhysCSEs;
if (Commuted)
++NumCommutes;
Changed = true;
} else {
DEBUG(dbgs() << "*** Not profitable, avoid CSE!\n");
VNT.insert(MI, CurrVN++);

5
lib/CodeGen/MachineSink.cpp
View File

@ -265,8 +265,11 @@ bool MachineSinking::ProcessBlock(MachineBasicBlock &MBB) {
if (MI->isDebugValue())
continue;
if (PerformTrivialForwardCoalescing(MI, &MBB))
bool Joined = PerformTrivialForwardCoalescing(MI, &MBB);
if (Joined) {
MadeChange = true;
continue;
}
if (SinkInstruction(MI, SawStore))
++NumSunk, MadeChange = true;