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Commit 0a37163d authored by Jessica Paquette's avatar Jessica Paquette
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[GlobalISel] Add scalar widening for G_MERGE_VALUES destination 

This adds support for the case where

WideSize = DstSize + K * SrcSize

In this case, we can pad the G_MERGE_VALUES instruction with K extra undef
values with width SrcSize. Then the destination can be handled via
widenScalarDst.

Differential Revision: https://reviews.llvm.org/D106814
parent 69daca02
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