Matt Arsenault 0966dd0d69 GlobalISel: Handle widenScalar of arbitrary G_MERGE_VALUES sources ...

Extract the sources to the GCD of the original size and target size,
padding with implicit_def as necessary.

Also fix the case where the requested source type is wider than the
original result type. This was ignoring the type, and just using the
destination. Do the operation in the requested type and truncate back.

llvm-svn: 366367

2019-07-17 20:22:44 +00:00

45 KiB

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