[Bug tree-optimization/94375] 548.exchange2_r run time is 8-18% worse than GCC 9 at -Ofast -march=native

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94375

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Blocks|                            |53947

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Do we ever hit the vectorized paths?  I guess the number of iterations isn't
bound so the cost model has a hard time, possibly only triggering at runtime.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations