[Bug tree-optimization/56501] [4.6/4.7 Regression] gcc 4.6 ICE on noreturn function at -Os and above

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56501

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2013-04-03
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> 2013-04-03 10:10:06 UTC ---
Testing

Index: gcc/tree-switch-conversion.c
===================================================================
--- gcc/tree-switch-conversion.c        (revision 197348)
+++ gcc/tree-switch-conversion.c        (working copy)
@@ -283,7 +283,12 @@ check_process_case (tree cs)
          return false;
        }

-      e = single_succ_edge (label_bb);
+      if (!single_succ_p (label_bb))
+       {
+         info.reason
+           = "  Bad case - a non-final BB without a single successor\n";
+         return false;
+       }
       following_bb = single_succ (label_bb);
     }