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[MemorySSA] Remove a redundant dyn_cast.

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StartingAccess is a MemoryUseOrDef. No need to check again.

llvm-svn: 326000
This commit is contained in:
George Burgess IV 2018-02-24 00:15:21 +00:00
parent a708ff01af
commit 1ee0de3c35
1 changed files with 2 additions and 3 deletions
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5
lib/Analysis/MemorySSA.cpp
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@ -2029,9 +2029,8 @@ MemorySSA::CachingWalker::getClobberingMemoryAccess(MemoryAccess *MA) {
// If this is an already optimized use or def, return the optimized result.
// Note: Currently, we do not store the optimized def result because we'd need
// a separate field, since we can't use it as the defining access.
if (auto *MUD = dyn_cast<MemoryUseOrDef>(StartingAccess))
if (MUD->isOptimized())
return MUD->getOptimized();
if (StartingAccess->isOptimized())
return StartingAccess->getOptimized();
const Instruction *I = StartingAccess->getMemoryInst();
UpwardsMemoryQuery Q(I, StartingAccess);