https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79014
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-01-09
Blocks| |53947
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is that GCC does not recognize s3[R[z] & mask] as valid gather
instruction (it does not understand the bitwise and doing scalar evolution
analysis for a start which it does to do dependence analysis).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
