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simplify this, isBytewiseValue handles the extra check. We still

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check for "multiple of a byte" in size to make it clear that the
>> 3 below is safe.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122604 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-12-28 18:53:48 +00:00
parent 1dc5db2beb
commit 95ae676bc8
1 changed files with 2 additions and 5 deletions
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7
lib/Transforms/Scalar/LoopIdiomRecognize.cpp
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@ -164,12 +164,9 @@ bool LoopIdiomRecognize::processLoopStore(StoreInst *SI, const SCEV *BECount) {
Value *StoredVal = SI->getValueOperand();
Value *StorePtr = SI->getPointerOperand();
// Check to see if the store updates all bits in memory. We don't want to
// process things like a store of i3. We also require that the store be a
// multiple of a byte.
// Reject stores that are so large that they overflow an unsigned.
uint64_t SizeInBits = TD->getTypeSizeInBits(StoredVal->getType());
if ((SizeInBits & 7) || (SizeInBits >> 32) != 0 ||
SizeInBits != TD->getTypeStoreSizeInBits(StoredVal->getType()))
if ((SizeInBits & 7) || (SizeInBits >> 32) != 0)
return false;
// See if the pointer expression is an AddRec like {base,+,1} on the current