[Bug tree-optimization/101121] New: [12 Regression] 416.gamess grd2b.f does not finish building

[Bug tree-optimization/101121] New: [12 Regression] 416.gamess grd2b.f does not finish building

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101121

            Bug ID: 101121
           Summary: [12 Regression] 416.gamess grd2b.f does not finish
                    building
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

With -Ofast -march=haswell -std=legacy -fno-aggressive-loop-optimizations this
is somewhere stuck in SLP build not making progress.

[Bug tree-optimization/101121] [12 Regression] 416.gamess grd2b.f does not finish building

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101121

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
           Keywords|                            |compile-time-hog
   Target Milestone|---                         |12.0
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-06-18

[Bug tree-optimization/101121] [12 Regression] 416.gamess grd2b.f does not finish building

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101121

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 51035
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51035&action=edit
reduced testcase

Reduced testcase - it must get still smaller but it only very slowly reduces
now.

[Bug tree-optimization/101121] [12 Regression] 416.gamess grd2b.f does not finish building

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101121

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:90f78d5d86598f8cadacfb20d8d98c122a466599

commit r12-1670-g90f78d5d86598f8cadacfb20d8d98c122a466599
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Jun 21 09:30:41 2021 +0200

    tree-optimization/101121 - avoid infinite SLP build

    The following plugs another hole where we cache a failed SLP build
    attempt with an all-success 'matches'.  It also adds checking that
    we don't do that.

    2021-06-21  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/101121
            * tree-vect-slp.c (vect_build_slp_tree_2): To not fail fatally
            when we just lack a stmt with the desired op when doing
permutation.
            (vect_build_slp_tree): When caching a failed SLP build attempt
            assert that at least one lane is marked as not matching.

            * gfortran.dg/pr101121.f: New testcase.

[Bug tree-optimization/101121] [12 Regression] 416.gamess grd2b.f does not finish building

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101121

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Should be fixed now.