re PR rtl-optimization/41697 (ICE on gcc.c-torture/compile/20090917-1.c)

        PR rtl-optimization/41697
        * sel-sched-ir.c (fallthru_bb_of_jump): Bail out when a block with
        a conditional jump has a single successor.

From-SVN: r154148

gcc/ChangeLog

 2009-11-13  Andrey Belevantsev  <abel@ispras.ru>
 
+        PR rtl-optimization/41697
+	* sel-sched-ir.c (fallthru_bb_of_jump): Bail out when a block with 
+	a conditional jump has a single successor. 
+
+2009-11-13  Andrey Belevantsev  <abel@ispras.ru>
+
 	* sched-deps.c (init_deps): New parameter lazy_reg_last.  Don't
 	allocate reg_last when in case lazy_reg_last is true.
 	(init_deps_reg_last): New.

gcc/sel-sched-ir.c

@@ -4323,6 +4323,11 @@ fallthru_bb_of_jump (rtx jump)
   if (!any_condjump_p (jump))
     return NULL;
 
+  /* A basic block that ends with a conditional jump may still have one successor
+     (and be followed by a barrier), we are not interested.  */
+  if (single_succ_p (BLOCK_FOR_INSN (jump)))
+    return NULL;
+
   return FALLTHRU_EDGE (BLOCK_FOR_INSN (jump))->dest;
 }