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References: <bug-20514-334@http.gcc.gnu.org/bugzilla/>
Subject: [Bug tree-optimization/20514] hoisting of label out of jumptable would take place at cse, should happen at trees
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------- Comment #5 from pinskia at gcc dot gnu dot org  2006-09-17 07:59 -------
(In reply to comment #2)
> Two things, we just don't jump thread.
The testcase mentioned in comment #2 is fixed but we still don't make an
infinite loop for the orginal case:
<L9>:;
  switch (i_lsm.25)
    {
      case 0 ... 1: goto <L1>;
      case 2 ... 3: goto <L12>;
      case 5: goto <L5>;
      default : goto <L9>;
    }
<L5>:;
  i_lsm.25 = 4;
  goto <bb 3> (<L9>);
...
Which is obvious an infinite loop but we still go through the switch every
time.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2006-01-21 03:00:56         |2006-09-17 07:59:49
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20514