llvm-project

2190808f - [X86] SimplifyDemandedVectorEltsForTargetNode - reduce the size of VPERMV/VPERMV3 nodes if the upper elements are not demanded (REAPPLIED) (#134263)

[X86] SimplifyDemandedVectorEltsForTargetNode - reduce the size of VPERMV/VPERMV3 nodes if the upper elements are not demanded (REAPPLIED) (#134263) With AVX512VL targets, use 128/256-bit VPERMV/VPERMV3 nodes when we only need the lower elements. Reapplied version of #133923 with fix for typo in the VPERMV3 mask adjustment