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Add comment to clarify the behavior of a helper in DSE.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139571 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman 2011-09-13 01:28:59 +00:00
parent 5ac7c7da3e
commit 1582e7f1e2
1 changed files with 2 additions and 0 deletions
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2
lib/Transforms/Scalar/DeadStoreElimination.cpp
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@ -159,6 +159,8 @@ static bool hasMemoryWrite(Instruction *I) {
}
/// getLocForWrite - Return a Location stored to by the specified instruction.
/// If isRemovable returns true, this function and getLocForRead completely
/// describe the memory operations for this instruction.
static AliasAnalysis::Location
getLocForWrite(Instruction *Inst, AliasAnalysis &AA) {
if (StoreInst *SI = dyn_cast<StoreInst>(Inst))