[Bug tree-optimization/117379] Failure to vectorize multi add + mulit sub

"avinashd at gcc dot gnu.org via Gcc-bugs" <[email protected]> Tue, 11 Aug 2026 07:06:54 +0000

Newsgroups	gmane.comp.gcc.bugs
Message-ID	<[email protected]/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117379

Avinash Jayakar <avinashd at gcc dot gnu.org> changed:

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                 CC|                            |avinashd at gcc dot gnu.org

--- Comment #3 from Avinash Jayakar <avinashd at gcc dot gnu.org> ---
I can take a look at this one. I see that even if the operations are not mixed,
the vectorization does not happen in powerpc

https://godbolt.org/z/YEM1q4bM8

but it does in x86, although clang seems to generate smaller code:

https://godbolt.org/z/zTacs4Khj