[llvm-bugs] [Bug 9588] [regalloc remat] Repeated generation of 0 constant

via llvm-bugs llvm-bugs at lists.llvm.org
Thu Sep 26 14:19:46 PDT 2019


https://bugs.llvm.org/show_bug.cgi?id=9588

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|FIXED                       |---
             Status|RESOLVED                    |REOPENED
                 CC|                            |craig.topper at gmail.com,
                   |                            |llvm-dev at redking.me.uk,
                   |                            |spatel+llvm at rotateright.com

--- Comment #9 from Simon Pilgrim <llvm-dev at redking.me.uk> ---
This looks like we still have duplicate zeros that should be merged:

        xorps   %xmm3, %xmm3  <- scalar f32 zero
        xorps   %xmm4, %xmm4  <- vector v4f32 zero
        ucomiss %xmm2, %xmm4
        seta    %cl
        cmpltps %xmm3, %xmm1
        cmpltps %xmm3, %xmm0

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