[Bug tree-optimization/120927] [15/16 Regression] 510.parest_r segfaults built with -Ofast -march=znver4 --param vect-partial-vector-usage=1

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120927

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Target|                            |x86_64-*-*
   Target Milestone|---                         |15.2
             Blocks|                            |26163
            Summary|[16 Regression]             |[15/16 Regression]
                   |510.parest_r segfaults      |510.parest_r segfaults
                   |built with -Ofast           |built with -Ofast
                   |-march=znver4 --param       |-march=znver4 --param
                   |vect-partial-vector-usage=1 |vect-partial-vector-usage=1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Also happens on the 15 branch, also happens with -O3 instead of -Ofast.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)