[Bug tree-optimization/78433] [7 Regression] glibc posix/execvpe.c gets miscompiled with -O3

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78433

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-11-20
                 CC|                            |krebbel at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r242590:

commit 35d8be37ee5f4bc13bb3ee30b55c0c379e9a89a2
Author: krebbel <krebbel@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Fri Nov 18 14:44:54 2016 +0000

    Re-apply: Drop excess size used for run time allocated stack variables.

    The patch got reverted after hitting PR77359 which turned out to be a
    rs6000 backend problem.  Reapplying after the PR got fixed.