[Bug tree-optimization/97979] [11 Regression]: Segmentation fault with "-O3 -fno-toplevel-reorder -fno-tree-ccp" since r11-5271-g4866b2f5db117f9e

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97979

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

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

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 49625
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49625&action=edit
gcc11-pr97979.patch

The match.pd pattern was unprepared to handle int_const_binop giving up, which
it now does for some of the UB shifts (and I think should even for shifts with
positive shift amount but larger or equal to the bitsize).  int_const_binop
similarly gives up for division by zero etc.