mangle.c (write_expression): Change ABI v6 to v5.

	* mangle.c (write_expression): Change ABI v6 to v5.
	(write_type): Likewise.

From-SVN: r170711

gcc/common.opt

@@ -739,13 +739,12 @@ Driver Undocumented
 ;    in template non-type arguments of pointer type.
 ;
 ; 4: The version of the ABI that introduces unambiguous mangling of
-;    vector types.
+;    vector types.  First selectable in G++ 4.5.
 ;
 ; 5: The version of the ABI that ignores attribute const/noreturn
-;    in function pointer mangling.
-;
-; 6: The version of the ABI that corrects mangling of decltype and
+;    in function pointer mangling, and corrects mangling of decltype and
 ;    function parameters used in other parameters and the return type.
+;    First selectable in G++ 4.6.
 ;
 ; Additional positive integers will be assigned as new versions of
 ; the ABI become the default version of the ABI.

gcc/cp/ChangeLog

+2011-03-05  Jason Merrill  <jason@redhat.com>
+
+	* mangle.c (write_expression): Change ABI v6 to v5.
+	(write_type): Likewise.
+
 2011-03-04  Jan Hubicka  <jh@suse.cz>
 
 	PR lto/47497

gcc/cp/mangle.c

@@ -1934,8 +1934,8 @@ write_type (tree type)
 	      gcc_assert (!DECLTYPE_FOR_LAMBDA_CAPTURE (type)
 			  && !DECLTYPE_FOR_LAMBDA_RETURN (type));
 
-	      /* In ABI <6, we stripped decltype of a plain decl.  */
-	      if (!abi_version_at_least (6)
+	      /* In ABI <5, we stripped decltype of a plain decl.  */
+	      if (!abi_version_at_least (5)
 		  && DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P (type))
 		{
 		  tree expr = DECLTYPE_TYPE_EXPR (type);
@@ -2498,7 +2498,7 @@ write_expression (tree expr)
       write_char ('f');
       if (delta != 0)
 	{
-	  if (abi_version_at_least (6))
+	  if (abi_version_at_least (5))
 	    {
 	      /* Let L be the number of function prototype scopes from the
 		 innermost one (in which the parameter reference occurs) up