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fix a bug where the bswap matcher could match a case involving
ashr. It should only apply to lshr. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57089 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -3912,9 +3912,12 @@ static bool CollectBSwapParts(Value *V, SmallVector<Value*, 8> &ByteValues) {
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if (I->getOpcode() == Instruction::Shl) {
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// X << 24 defines the top byte with the lowest of the input bytes.
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DestNo = ByteValues.size()-1;
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} else {
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} else if (I->getOpcode() == Instruction::LShr) {
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// X >>u 24 defines the low byte with the highest of the input bytes.
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DestNo = 0;
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} else {
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// Arithmetic shift right may have the top bits set.
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return true;
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}
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// If the destination byte value is already defined, the values are or'd
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