[llvm-bugs] [Bug 46393] Failure to optimize vpmovsxwd+vpslld properly

via llvm-bugs llvm-bugs at lists.llvm.org
Thu Oct 29 09:46:03 PDT 2020


https://bugs.llvm.org/show_bug.cgi?id=46393

Simon Pilgrim <llvm-dev at redking.me.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
 Fixed By Commit(s)|                            |618a890b72f8,93ebefb9ee75
         Resolution|---                         |FIXED

--- Comment #3 from Simon Pilgrim <llvm-dev at redking.me.uk> ---
(In reply to Simon Pilgrim from comment #2)
> Would it make sense to remove lane crossing variable shuffles from the fast
> shuffle logic? The simplest way would be to increase the threshold in those
> cases to match the non-fast mode.

Craig fixed this at rG618a890b72f8, I added a test case at rG93ebefb9ee75

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