[llvm-bugs] [Bug 40058] Failure to detect bswap at the end of a bitreverse sequence

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=40058

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CONFIRMED                   |RESOLVED
 Fixed By Commit(s)|                            |401d6685c0aa20ba97f8311a880
                   |                            |04beedf92f3c0
         Resolution|---                         |FIXED

--- Comment #3 from Simon Pilgrim <llvm-dev at redking.me.uk> ---
(In reply to Simon Pilgrim from comment #2)
> https://reviews.llvm.org/D90170 led to a proposal that we match more complex
> bitreverse/bswap patterns inside AggressiveInstCombine, although I haven't
> had time to look at the compile time implications yet.

rG401d6685c0aa20ba97f8311a88004beedf92f3c0 now matches bitreverse in
InstCombine - we've trimmed the costs of the recursions into collectBitParts
that we can realistically perform this now.

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