Differential D127818 Diff 437294 llvm/lib/Target/PowerPC/PPCISelLowering.cpp

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llvm/lib/Target/PowerPC/PPCISelLowering.cpp

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Show First 20 Lines • Show All 14,879 Lines • ▼ Show 20 Lines	SDValue PPCTargetLowering::combineVectorShuffle(ShuffleVectorSDNode *SVN,

// Adjust the shuffle mask if either input vector comes from a		// Adjust the shuffle mask if either input vector comes from a
// SCALAR_TO_VECTOR and keep the respective input vector in permuted		// SCALAR_TO_VECTOR and keep the respective input vector in permuted
// form (to prevent the need for a swap).		// form (to prevent the need for a swap).
SmallVector<int, 16> ShuffV(Mask.begin(), Mask.end());		SmallVector<int, 16> ShuffV(Mask.begin(), Mask.end());
SDValue SToVLHS = isScalarToVec(LHS);		SDValue SToVLHS = isScalarToVec(LHS);
SDValue SToVRHS = isScalarToVec(RHS);		SDValue SToVRHS = isScalarToVec(RHS);
if (SToVLHS \|\| SToVRHS) {		if (SToVLHS \|\| SToVRHS) {
		// FIXME: If both LHS and RHS are SCALAR_TO_VECTOR, but are not the
		// same type and have differing element sizes, then do not perform
		// the following transformation. The current transformation for
		// SCALAR_TO_VECTOR assumes that both input vectors have the same
		// element size. This will be updated in the future to account for
		// differing sizes of the LHS and RHS.
		if (SToVLHS && SToVRHS &&
		(SToVLHS.getValueType().getScalarSizeInBits() !=
		SToVRHS.getValueType().getScalarSizeInBits()))
		return Res;

int NumEltsIn = SToVLHS ? SToVLHS.getValueType().getVectorNumElements()		int NumEltsIn = SToVLHS ? SToVLHS.getValueType().getVectorNumElements()
: SToVRHS.getValueType().getVectorNumElements();		: SToVRHS.getValueType().getVectorNumElements();
int NumEltsOut = ShuffV.size();		int NumEltsOut = ShuffV.size();
// The width of the "valid lane" (i.e. the lane that contains the value that		// The width of the "valid lane" (i.e. the lane that contains the value that
// is vectorized) needs to be expressed in terms of the number of elements		// is vectorized) needs to be expressed in terms of the number of elements
// of the shuffle. It is thereby the ratio of the values before and after		// of the shuffle. It is thereby the ratio of the values before and after
// any bitcast.		// any bitcast.
unsigned ValidLaneWidth =		unsigned ValidLaneWidth =
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