[Bug tree-optimization/126029] New: `!bool_var + 1`, `2 - bool_var`, `1<

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126029

            Bug ID: 126029
           Summary: `!bool_var + 1`, `2 - bool_var`, `1<<!a` all should
                    produce the same code
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Keywords: easyhack, missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

```
int f(_Bool a)
{
  return !a + 1;
}
int f1(_Bool a)
{
  return 1 - a + 1;
}
int f2(_Bool a)
{
  return 1<<!a;
}

int f3(_Bool a)
{
  return (a?1:2);
}

```

These all should produce the same code. `2 - (int)bool_var` .

Also these two should produce the same code:
```

int g1(_Bool a)
{
  return 1 + a;
}
int g2(_Bool a)
{
  return 1<<a;
}
```

`1 + a` would be the best