[Bug target/112112] Improper Arithmetic Type Conversion in s390x-linux-gnu-gcc

[tkoenig at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112112

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-11-01
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |WAITING

--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to 김대영 from comment #6)
> ```
> z3rodae0@z3rodae0:~$ ./sh.sh
> result for -O0 "signed" = 1
> result for -O1 "signed" = 1
> result for -O2 "signed" = 1
> result for -O3 "signed" = 1
> result for -O0 "unsigned" = 0
> result for -O1 "unsigned" = 0
> result for -O2 "unsigned" = 0
> result for -O3 "unsigned" = 0
> result for -O0 "" = 1
> result for -O1 "" = 1
> result for -O2 "" = 1
> result for -O3 "" = 1
> ```
> 
> That's correct. I ran your code and script in my environment, and it
> produced the same results

That is weird.

I don't see a meaningful difference between the version without signed or
unsigned and your program, and you get inconsistent results with your
original program and consistent results with the other one.

Or am I missing something?