[Bug rtl-optimization/47036] [4.6 Regression] ICE: in move_cond_jump, at sel-sched.c:4901 with -fschedule-insns -fselective-scheduling -fno-dce

["amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47036

Alexander Monakov <amonakov at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2010.12.22 14:32:58
         AssignedTo|unassigned at gcc dot       |amonakov at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> 2010-12-22 14:32:58 UTC ---
Untested patch.  I wonder if it has any effect on code generation (it
shouldn't; I don't see how we handle moving of unconditional jumps).

diff --git a/gcc/sel-sched-ir.c b/gcc/sel-sched-ir.c
index 468dfd7..de40ba0 100644
--- a/gcc/sel-sched-ir.c
+++ b/gcc/sel-sched-ir.c
@@ -4441,9 +4441,6 @@ fallthru_bb_of_jump (rtx jump)
   if (!JUMP_P (jump))
     return NULL;

-  if (any_uncondjump_p (jump))
-    return single_succ (BLOCK_FOR_INSN (jump));
-
   if (!any_condjump_p (jump))
     return NULL;