[Bug rtl-optimization/118598] New: [12/13/14/15 Regression] Shrink-wrapping multiple conditions

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118598

            Bug ID: 118598
           Summary: [12/13/14/15 Regression] Shrink-wrapping multiple
                    conditions
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
                CC: unassigned at gcc dot gnu.org
  Target Milestone: ---
            Target: powerpc64-linux-gnu

Testcase:
```
int gl = 0;
void bar ();
void foo (int a)
{
  int i;
  if (a == 42)
    return;
  for (i = 0; i < a; i++)
    bar ();
}

```

At -O2 for powerpc64-linux-gnu this used to shrink wrap in GCC 11.4.0 but no
longer does in GCC 12+.