[PATCH] D57348: [CodeGen][X86] Don't scalarize vector saturating add/sub

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

@aemerson Thanks for the report! From a quick look, looks like the usubsat expands to usubo, which is then expanded during op legalization, while it needs to be expanded during vector op legalization. We're doing that for umulo and smulo, but apparently not for uaddo/saddo and usubo/ssubo. I'll prepare a patch.


Repository:
  rL LLVM

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https://reviews.llvm.org/D57348