[Bug tree-optimization/22401] New: DOM messes up the profiling info

["pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Take the following simple example loop:
void __show_backtrace(void *rw)
{
  while(rw);
}

We get invalid warnings in the tree dumps about profiling info being wrong:
__show_backtrace (rw)
{
<L3>:;
  if (rw_1 != 0B) goto <L0>; else goto <L2>;

Invalid sum of incoming frequencies 9879, should be 8900
<L0>:;
  goto <bb 1> (<L0>);

Invalid sum of incoming frequencies 121, should be 1100
<L2>:;
  return;

}

I am filing this because for 4.2, I hear that the rtl level profiling info will be coming from the tree level 
(after loop.c is removed).

-- 
           Summary: DOM messes up the profiling info
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org,law at gcc dot gnu dot
                    org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22401