[Bug tree-optimization/115841] [12/13/14 Regression] 521.wrf_r ICEs when building with -march=znver4 -Ofast -flto --param vect-partial-vector-usage=1

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115841

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |14.2
            Summary|521.wrf_r ICEs when         |[12/13/14 Regression]
                   |building with -march=znver4 |521.wrf_r ICEs when
                   |-Ofast -flto --param        |building with -march=znver4
                   |vect-partial-vector-usage=1 |-Ofast -flto --param
                   |                            |vect-partial-vector-usage=1

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
The problem is latent since GCC 12 adding reusable accumulator support.  I'm
testing a fix currently and will push to trunk once ready.