[Bug tree-optimization/126459] New: [17 Regression] Wrong code with x != CST1 ? x + CST2 : CST3 fold

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126459

            Bug ID: 126459
           Summary: [17 Regression] Wrong code with x != CST1 ? x + CST2 :
                    CST3 fold
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ktkachov at gcc dot gnu.org
  Target Milestone: ---

__attribute__((noipa)) int
h (int x)
{
  int t = (x != __INT_MAX__) ? x + 1 : (-__INT_MAX__ - 1);
  return t > x;
}

int
main (void)
{
  if (h (__INT_MAX__) != 0)
    __builtin_abort ();
  if (h (1) != 1)
    __builtin_abort ();
  return 0;
}

aborts with optimisation with GCC 17