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fix a few old bugs (found by inspection) where we would zap instructions

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without informing memdep.  This could cause nondeterminstic weirdness 
based on where instructions happen to get allocated, and will hopefully
breath some life into some broken testers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123124 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2011-01-09 19:26:10 +00:00
parent 2cfa5b4934
commit f42685004c
1 changed files with 4 additions and 1 deletions
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5
lib/Transforms/Scalar/MemCpyOptimizer.cpp
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@ -385,7 +385,8 @@ Instruction *MemCpyOpt::tryMergingIntoMemset(Instruction *StartInst,
// Check to see if this store is to a constant offset from the start ptr.
int64_t Offset;
if (!IsPointerOffset(StartPtr, NextStore->getPointerOperand(), Offset, *TD))
if (!IsPointerOffset(StartPtr, NextStore->getPointerOperand(),
Offset, *TD))
break;
Ranges.addStore(Offset, NextStore);
@ -490,6 +491,7 @@ bool MemCpyOpt::processStore(StoreInst *SI, BasicBlock::iterator &BBI) {
if (changed) {
MD->removeInstruction(SI);
SI->eraseFromParent();
MD->removeInstruction(LI);
LI->eraseFromParent();
++NumMemCpyInstr;
return true;
@ -786,6 +788,7 @@ bool MemCpyOpt::processMemCpy(MemCpyInst *M) {
if (CallInst *C = dyn_cast<CallInst>(DepInfo.getInst())) {
if (performCallSlotOptzn(M, M->getDest(), M->getSource(),
CopySize->getZExtValue(), C)) {
MD->removeInstruction(M);
M->eraseFromParent();
return true;
}