https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81948
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-08-24
Blocks| |53947
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. glibc uses a different alg for exp2 than exp but for exp10 it
simply does exp(x * log(10)) it seems.
Probably requires some refactoring in vectorizable_simd_clone_call.
Or we decide that with -funsafe-math-optimizations canonicalizing expN/logN
to exp/log is worthwhile.
The best thing would be to enhance glibc of course.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
