For PR java/6519:

	* parse.y (build_string_concatenation): Return just op1 only when op2
	is null and op1 is a STRING_CST, otherwise always construct a
	StringBuffer.

From-SVN: r53158

gcc/java/ChangeLog

+2002-05-04  Mark Wielaard  <mark@klomp.org>
+
+	For PR java/6519:
+	* parse.y (build_string_concatenation): Return just op1 only when op2
+	is null and op1 is a STRING_CST, otherwise always construct a
+	StringBuffer.
+
 2002-04-27  Tom Tromey  <tromey@redhat.com>
 
 	For PR java/6382:

gcc/java/parse.y

@@ -13834,8 +13834,8 @@ build_string_concatenation (op1, op2)
     op2 = patch_string_cst (op2);
 
   /* If either one of the constant is null and the other non null
-     operand is a String object, return it. */
-  if (JSTRING_TYPE_P (TREE_TYPE (op1)) && !op2)
+     operand is a String constant, return it. */
+  if ((TREE_CODE (op1) == STRING_CST) && !op2)
     return op1;
 
   /* If OP1 isn't already a StringBuffer, create and