* c-common.c (c_expand_expr): Fix prototype.
	* c-common.h (c_expand_expr): Always declare, update.
	* c-lang.c (LANG_HOOKS_EXPAND_EXPR): Redefine.
	* c-objc-common.c (c_objc_common_init): No global hook.
	* expr.c (expand_expr): Use langhook.
	* expr.h (enum expand_modifier): Conditionally declare.
	* langhooks-def.h (lhd_expand_expr, LANG_HOOKS_EXPAND_EXPR): New.
	(LANG_HOOKS_INITIALIZER): Update.
	* langhooks.c (lhd_expand_expr): New.
	* langhooks.h (struct lang_hooks): New hook.
	* toplev.c (lang_expand_expr_t, lang_expand_expr): Delete.
	(lang_independent_init): Don't default hook.
ada:
	* misc.c (LANG_HOOKS_EXPAND_EXPR): Redefine.
	(gnat_init): Don't set hook.
	(gnat_expand_expr): Fix prototype.
cp:
	* cp-lang.c (LANG_HOOKS_EXPAND_EXPR): Redefine.
	* cp-tree.h (init_cplus_expand): Remove.
	(cxx_expand_expr): New.
	* expr.c (cplus_expand_expr): Rename cxx_expand_expr,
	fix prototype.
	(init_cplus_expand): Remove.
	* lex.c (cxx_init): Don't call init_cplus_expand.
java:
	* expr.c (java_lang_expand_expr): Rename java_expand_expr,
	fix prototype.
	* java-tree.h (java_lang_expand_expr): Similarly.
	* lang.c (LANG_HOOKS_EXPAND_EXPR): Redefine.
	(java_init): Don't set hook.
objc:
	* objc-lang.c (LANG_HOOKS_EXPAND_EXPR): Redefine.

From-SVN: r51462