re PR lto/54980 (gimple check: expected gimple_cond(error_mark), have…

re PR lto/54980 (gimple check: expected gimple_cond(error_mark), have gimple_call() in gimple_cond_set_lhs, at gimple.h:2578)


	PR tree-optimize/54980
	* tree-ssa-loop-ivcanon.c (constant_after_peeling): Fix
	obvious typo.
	(loop_edge_to_cancel): Be sure that the edge is from an conditional
	so we can cancel it.

From-SVN: r192809

gcc/ChangeLog

+2012-10-25  Jan Hubicka  <jh@suse.cz>
+
+	PR tree-optimize/54980
+	* tree-ssa-loop-ivcanon.c (constant_after_peeling): Fix
+	obvious typo.
+	(loop_edge_to_cancel): Be sure that the edge is from an conditional
+	so we can cancel it.
+
 2012-10-25  Marc Glisse  <marc.glisse@inria.fr>
 
 	PR c++/54427

gcc/tree-ssa-loop-ivcanon.c

@@ -160,7 +160,7 @@ constant_after_peeling (tree op, gimple stmt, struct loop *loop)
       /* First make fast look if we see constant array inside.  */
       while (handled_component_p (base))
 	base = TREE_OPERAND (base, 0);
-      if ((DECL_P (base) == VAR_DECL
+      if ((DECL_P (base)
 	   && const_value_known_p (base))
 	  || CONSTANT_CLASS_P (base))
 	{
@@ -364,6 +364,10 @@ loop_edge_to_cancel (struct loop *loop)
        else
          edge_to_cancel = EDGE_SUCC (edge_to_cancel->src, 0);
 
+      /* We only can handle conditionals.  */
+      if (!(edge_to_cancel->flags & (EDGE_TRUE_VALUE | EDGE_FALSE_VALUE)))
+	continue;
+
       /* We should never have conditionals in the loop latch. */
       gcc_assert (edge_to_cancel->dest != loop->header);