[Bug tree-optimization/100609] New: bool - 1 is not simplified to -a

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100609

            Bug ID: 100609
           Summary: bool - 1 is not simplified to -a
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
            Blocks: 25290
  Target Milestone: ---

Take:
int f(_Bool a)
{
  int t = a;
  return t - 1;
}

int g(_Bool a)
{
  int t = a;
  return -t;
}
---- CUT ----
Both of these are the same and should produce the same code gen.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25290
[Bug 25290] PHI-OPT could be rewritten so that is uses match