Fix excess errors problem for invalid vector testcase.

* convert.c (convert_to_vector): Replace recursive call with
error_mark_node.
* gcc.dg/convert-vec-1.c: New test.

From-SVN: r87340

gcc/ChangeLog

@@ -10,6 +10,9 @@
 
 2004-09-10  James E Wilson  <wilson@specifixinc.com>
 
+	* convert.c (convert_to_vector): Replace recursive call with
+	error_mark_node.
+
 	* emit-rtl.c (gen_const_vector): Renamed from gen_const_vector_0.
 	Add integer argument named constant.  Use const_tiny_rtx instead of
 	CONST0_RTX.

gcc/convert.c

@@ -761,6 +761,6 @@ convert_to_vector (tree type, tree expr)
 
     default:
       error ("can't convert value to a vector");
-      return convert_to_vector (type, integer_zero_node);
+      return error_mark_node;
     }
 }

gcc/testsuite/ChangeLog

+2004-09-10  James E Wilson  <wilson@specifixinc.com>
+
+	* gcc.dg/convert-vec-1.c: New test.
+
 2004-09-10  Roger Sayle  <roger@eyesopen.com>
 
 	PR middle-end/17024

gcc/testsuite/gcc.dg/convert-vec-1.c

+/* { dg-do compile } */
+typedef float v2sf __attribute__ ((vector_size (8)));
+v2sf sub (void) { return (v2sf) 0.0; } /* { dg-error "can't convert" } */