https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88497
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
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Target| |powerpc*
Component|middle-end |target
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think it is reassoc doing it "wrong" based on the targets reassoc-width?
Because the vectorizer generates exactly the code you are proposing.
Though you didn't even provide a fully compilable testcase. I guessed N to
be 16 here and your ideal examples use 'accumulator' which I assume to be 0.0.
Your x86 code-gen examples are also from GCC 8 I assume (plus some -march/tune
flag you didn't expose given it uses haddpd)
