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don't bother touching volatile stores, they will just return clobber on

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everything interesting anyway.

llvm-svn: 60640
This commit is contained in:
Chris Lattner 2008-12-07 00:25:15 +00:00
parent a04521164c
commit 135a48d48b
1 changed files with 5 additions and 0 deletions
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5
lib/Transforms/Scalar/DeadStoreElimination.cpp
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@ -90,6 +90,11 @@ bool DSE::runOnBasicBlock(BasicBlock &BB) {
// If we find a store or a free, get it's memory dependence.
if (!isa<StoreInst>(Inst) && !isa<FreeInst>(Inst))
continue;
// Don't molest volatile stores or do queries that will return "clobber".
if (StoreInst *SI = dyn_cast<StoreInst>(Inst))
if (SI->isVolatile())
continue;
MemDepResult InstDep = MD.getDependency(Inst);