re PR middle-end/18725 (another ICE on trivial invalid asm)

2004-11-29  Andrew Pinski  <pinskia@physics.uc.edu>

        PR middle-end/18725
        * gcc.dg/pr18725.c: New test.

2004-11-29  Andrew Pinski  <pinskia@physics.uc.edu>

        PR middle-end/18725
        * tree-cfg.c (tree_node_can_be_shared): Error_mark_node can be
        shared always.

From-SVN: r91487

gcc/ChangeLog

+2004-11-29  Andrew Pinski  <pinskia@physics.uc.edu>
+
+	PR middle-end/18725
+	* tree-cfg.c (tree_node_can_be_shared): Error_mark_node can be
+	shared always.
+
 2004-11-29  Diego Novillo  <dnovillo@redhat.com>
 
 	PR tree-optimization/18712

gcc/testsuite/ChangeLog

+2004-11-29  Andrew Pinski  <pinskia@physics.uc.edu>
+
+	PR middle-end/18725
+	* gcc.dg/pr18725.c: New test.
+
 2004-11-29  Hans-Peter Nilsson  <hp@bitrange.com>
 
 	PR target/18488

gcc/testsuite/gcc.dg/pr18725.c

+/* { dg-do compile } */
+/* { dg-options "" } */
+
+void
+f (void)
+{
+   int x = 1;
+   asm ("" : "" (x), "" (x)); /* { dg-error "output operand constraint lacks" } */
+}

gcc/tree-cfg.c

@@ -3426,7 +3426,8 @@ tree_node_can_be_shared (tree t)
 	 gimple invariants if they overflowed.  */
       || CONSTANT_CLASS_P (t)
       || is_gimple_min_invariant (t)
-      || TREE_CODE (t) == SSA_NAME)
+      || TREE_CODE (t) == SSA_NAME
+      || t == error_node_mark)
     return true;
 
   if (TREE_CODE (t) == CASE_LABEL_EXPR)