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From: "vsevolod.livinskiy at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/108365] New: [9/10/11/12/13 Regression] Wrong
 code with -O0
Date: Tue, 10 Jan 2023 22:47:25 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 13.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108365

            Bug ID: 108365
           Summary: [9/10/11/12/13 Regression] Wrong code with -O0
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vsevolod.livinskiy at gmail dot com
  Target Milestone: ---

Link to the Compiler Explorer: https://godbolt.org/z/rMaofso7E

Reproducer:
char b[23] =3D {1};
int main() {
    for (;short(long((unsigned long)(-2147483647 - 1)) / long(b[0] ? -1 :
0)););
}

Error:
>$ g++ -O0 repr.cpp && ./a.out=20
Floating point exception (core dumped)

gcc version 13.0.0 20230110 (e9a39ad7936815980013605b052b12425d56ead8)=