Jay Foad d84e5fdac1 [AMDGPU][GlobalISel] Fix v2s16 right shifts ...

When widening, each half of the v2s16 operands needs to be sign extended
for G_ASHR or zero extended for G_LSHR.

Differential Revision: https://reviews.llvm.org/D96048

2021-02-04 17:04:32 +00:00

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