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[X86][SSE] lowerVectorShuffleAsByteShift tidyup
Removed local isSequential predicate and use standard helper isSequentialOrUndefInRange instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225216 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -7721,17 +7721,6 @@ static SDValue lowerVectorShuffleAsByteShift(SDLoc DL, MVT VT, SDValue V1,
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int Size = Mask.size();
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int Scale = 16 / Size;
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auto isSequential = [](int Base, int StartIndex, int EndIndex, int MaskOffset,
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ArrayRef<int> Mask) {
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for (int i = StartIndex; i < EndIndex; i++) {
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if (Mask[i] < 0)
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continue;
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if (i + Base != Mask[i] - MaskOffset)
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return false;
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}
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return true;
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};
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for (int Shift = 1; Shift < Size; Shift++) {
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int ByteShift = Shift * Scale;
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@ -7745,8 +7734,10 @@ static SDValue lowerVectorShuffleAsByteShift(SDLoc DL, MVT VT, SDValue V1,
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}
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if (ZeroableRight) {
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bool ValidShiftRight1 = isSequential(Shift, 0, Size - Shift, 0, Mask);
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bool ValidShiftRight2 = isSequential(Shift, 0, Size - Shift, Size, Mask);
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bool ValidShiftRight1 =
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isSequentialOrUndefInRange(Mask, 0, Size - Shift, Shift);
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bool ValidShiftRight2 =
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isSequentialOrUndefInRange(Mask, 0, Size - Shift, Size + Shift);
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if (ValidShiftRight1 || ValidShiftRight2) {
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// Cast the inputs to v2i64 to match PSRLDQ.
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@ -7768,8 +7759,10 @@ static SDValue lowerVectorShuffleAsByteShift(SDLoc DL, MVT VT, SDValue V1,
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}
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if (ZeroableLeft) {
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bool ValidShiftLeft1 = isSequential(-Shift, Shift, Size, 0, Mask);
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bool ValidShiftLeft2 = isSequential(-Shift, Shift, Size, Size, Mask);
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bool ValidShiftLeft1 =
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isSequentialOrUndefInRange(Mask, Shift, Size - Shift, 0);
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bool ValidShiftLeft2 =
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isSequentialOrUndefInRange(Mask, Shift, Size - Shift, Size);
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if (ValidShiftLeft1 || ValidShiftLeft2) {
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// Cast the inputs to v2i64 to match PSLLDQ.
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