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Grab the LLVMContext and parent Module of SI ahead of the

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point where SI can get deleted. This fixes a use of free'd memory.
This fixes Externals/Povray.

llvm-svn: 77285
This commit is contained in:
Dan Gohman 2009-07-28 00:37:06 +00:00
parent 0bcb94eeff
commit 361e911b89
1 changed files with 4 additions and 3 deletions
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7
lib/Transforms/Scalar/MemCpyOptimizer.cpp
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@ -352,6 +352,8 @@ bool MemCpyOpt::processStore(StoreInst *SI, BasicBlock::iterator& BBI) {
TargetData &TD = getAnalysis<TargetData>();
AliasAnalysis &AA = getAnalysis<AliasAnalysis>();
LLVMContext &Context = SI->getContext();
Module *M = SI->getParent()->getParent()->getParent();
// Okay, so we now have a single store that can be splatable. Scan to find
// all subsequent stores of the same value to offset from the same pointer.
@ -431,8 +433,7 @@ bool MemCpyOpt::processStore(StoreInst *SI, BasicBlock::iterator& BBI) {
if (MemSetF == 0) {
const Type *Tys[] = {Type::Int64Ty};
MemSetF = Intrinsic::getDeclaration(SI->getParent()->getParent()
->getParent(), Intrinsic::memset,
MemSetF = Intrinsic::getDeclaration(M, Intrinsic::memset,
Tys, 1);
}
@ -440,7 +441,7 @@ bool MemCpyOpt::processStore(StoreInst *SI, BasicBlock::iterator& BBI) {
StartPtr = Range.StartPtr;
// Cast the start ptr to be i8* as memset requires.
const Type *i8Ptr = SI->getContext().getPointerTypeUnqual(Type::Int8Ty);
const Type *i8Ptr = Context.getPointerTypeUnqual(Type::Int8Ty);
if (StartPtr->getType() != i8Ptr)
StartPtr = new BitCastInst(StartPtr, i8Ptr, StartPtr->getName(),
InsertPt);