[Bug middle-end/127185] New: non-call and large struct copies

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127185

            Bug ID: 127185
           Summary: non-call and large struct copies
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Keywords: EH, wrong-code
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Created attachment 65476
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65476&action=edit
testcase

Take this testcase. With -O0 -fnon-call-exceptions, the code is optimized to
just a memcpy with a return 1 at the end.  This is done on the rtl level.  The
gimple level has the correct eh info on things even.