Sanjay Patel 5dbb53b1b4 [InstCombine] merge shuffled vector negate and multiply ...

Add the "(0 - X) --> (X * -1)" reverse identity to the list of alternate form binops.

We need a little hack to make the existing logic work because it does not expect to
move constants from op0 to op1, but the code comment hopefully makes that clear.
I don't think there are any other identities like that.

Fixes #54364

Differential Revision: https://reviews.llvm.org/D122390

2022-03-24 10:25:16 -04:00

114 KiB

Raw Blame History

View Raw