Quentin Colombet d2321129bd [GlobalISel] Add X,Y<dead> = G_UNMERGE Z -> X = G_TRUNC Z ...

Add a combiner helper that replaces G_UNMERGE where all the destination lanes
are dead except the first one with a G_TRUNC.

Differential Revision: https://reviews.llvm.org/D87174

2020-09-14 17:27:23 -07:00

338 KiB

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