[Bug c/94809] [8/9/10 Regression] Different results between gcc-9 and gcc-6

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94809

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |jakub at gcc dot gnu.org
           Assignee|unassigned at gcc dot gnu.org      |jakub at gcc dot gnu.org
   Target Milestone|---                         |8.5

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That folds it into
IMAGPART_EXPR <.MUL_OVERFLOW ((long long unsigned int) a++ , one)> != 0
which looks correct, but somewhere later the side-effect is dropped.