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- Only perform the unfolding optimization when the folding in question is modref.

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- Remove a bogus assertion.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43211 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-10-22 03:01:44 +00:00
parent d958a5a9fe
commit cbfb9b27ef
1 changed files with 2 additions and 5 deletions
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7
lib/CodeGen/VirtRegMap.cpp
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@ -821,11 +821,8 @@ bool LocalSpiller::PrepForUnfoldOpti(MachineBasicBlock &MBB,
unsigned Idx = NewMI->findRegisterUseOperandIdx(VirtReg);
MachineInstr *FoldedMI = MRI->foldMemoryOperand(NewMI, Idx, SS);
if (FoldedMI) {
if (VRM.hasPhys(UnfoldVR))
assert(VRM.getPhys(UnfoldVR) == UnfoldPR);
else
if (!VRM.hasPhys(UnfoldVR))
VRM.assignVirt2Phys(UnfoldVR, UnfoldPR);
VRM.virtFolded(VirtReg, FoldedMI, VirtRegMap::isRef);
MII = MBB.insert(MII, FoldedMI);
VRM.RemoveFromFoldedVirtMap(&MI);
@ -1190,7 +1187,7 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, VirtRegMap &VRM) {
if (DeadStore) {
bool isDead = !(MR & VirtRegMap::isRef);
MachineInstr *NewStore = NULL;
if (MR & VirtRegMap::isMod) {
if (MR & VirtRegMap::isModRef) {
unsigned PhysReg = Spills.getSpillSlotOrReMatPhysReg(SS);
SmallVector<MachineInstr*, 4> NewMIs;
if (PhysReg &&