[Bug other/92152] New: [10 Regression] Wring code (Resurrection of PR53663)

[gjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92152

            Bug ID: 92152
           Summary: [10 Regression] Wring code (Resurrection of PR53663)
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gjl at gcc dot gnu.org
  Target Milestone: ---
            Target: avr

The following test case from GCC testsuite runs into abort.

https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/testsuite/gcc.dg/torture/pr53663-2.c?view=markup

== compile ==

$ avr-gcc pr53663-2.c -Os -dp -S

the generated asm code for main is:

main:
        sts v+1,__zero_reg__     ;  5   [c=4 l=4]  *movhi/3
        sts v,__zero_reg__
        rcall abort      ;  6   [c=0 l=1]  call_insn/1

i.e. it always calls abort.