[Bug tree-optimization/116083] [14/15 Regression] Re-surfacing SLP vectorization slowness for gcc.dg/pr87985.c

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116083

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2024-07-25
   Target Milestone|---                         |14.2
            Summary|Re-surfacing SLP            |[14/15 Regression]
                   |vectorization slowness for  |Re-surfacing SLP
                   |gcc.dg/pr87985.c            |vectorization slowness for
                   |                            |gcc.dg/pr87985.c
           Keywords|                            |needs-bisection

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 14 shows

 tree DSE                           :   0.51 (  5%)
 tree slp vectorization             :   8.20 ( 83%)

and GCC 13 is "fine":

 tree DSE                           :   0.32 ( 26%)
 tree slp vectorization             :   0.32 ( 26%)