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eliminate an unneeded branch, part of PR12357

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153458 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2012-03-26 19:13:57 +00:00
parent ef18cd381c
commit de813b7108
1 changed files with 2 additions and 7 deletions
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9
lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
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@ -1362,13 +1362,8 @@ static bool CollectBSwapParts(Value *V, int OverallLeftShift, uint32_t ByteMask,
// part of the value (e.g. byte 3) then it must be shifted right. If from the
// low part, it must be shifted left.
unsigned DestByteNo = InputByteNo + OverallLeftShift;
if (InputByteNo < ByteValues.size()/2) {
if (ByteValues.size()-1-DestByteNo != InputByteNo)
return true;
} else {
if (ByteValues.size()-1-DestByteNo != InputByteNo)
return true;
}
if (ByteValues.size()-1-DestByteNo != InputByteNo)
return true;
// If the destination byte value is already defined, the values are or'd
// together, which isn't a bswap (unless it's an or of the same bits).