[PATCH] D130895: [RISCV] Make VL choosing for a splat-like VMV based on its users

[Philip Reames via Phabricator via llvm-commits]

reames added a comment.

Spent some time looking at this today.  Wrote up my initial investigation as a bug (https://github.com/llvm/llvm-project/issues/57767), mostly because phab doesn't make long format comments easy.

The good news is that the scheduling interaction case I was most worried about doesn't appear to be relevant for this patch.  We already have that problem in generic IR; this code is basically only relevant for intrinsics.  We have a difference in lowering strategy between fixed length vectors and intrinsics which sends us down two different codepaths.


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