genmatch.c (expr::gen_transform): Clarify error message and display location.

2015-07-22  Richard Biener  <rguenther@suse.de>

	* genmatch.c (expr::gen_transform): Clarify error message
	and display location.

From-SVN: r226068

gcc/ChangeLog

 2015-07-22  Richard Biener  <rguenther@suse.de>
 
+	* genmatch.c (expr::gen_transform): Clarify error message
+	and display location.
+
+2015-07-22  Richard Biener  <rguenther@suse.de>
+
 	* genmatch.c (struct operand): Add location member.
 	(predicate, expr, c_expr, capture, if_expr, with_expr): Adjust
 	constructors.

gcc/genmatch.c

@@ -1877,7 +1877,7 @@ expr::gen_transform (FILE *f, int indent, const char *dest, bool gimple,
       type = optype;
     }
   if (!type)
-    fatal ("two conversions in a row");
+    fatal_at (location, "cannot determine type of operand");
 
   fprintf_indent (f, indent, "{\n");
   indent += 2;