* builtins.c (fold_builtin_1): Update a call to
	targetm.fold_builtin.
	* hooks.c (hook_tree_tree_bool_null): Rename to
	hook_tree_tree_tree_bool_null.  Take one more argument of type
	tree.
	* hooks.h: Update the prototype of hook_tree_tree_bool_null.
	* target-def.h (TARGET_FOLD_BUILTIN): Define it as
	hook_tree_tree_tree_bool_null.
	* target.h (gcc_target): Update the prototype of fold_builtin.
	* config/alpha/alpha.c (alpha_fold_builtin): Take decomposed
	arguments of CALL_EXPR.
	* doc/tm.texi (TARGET_FOLD_BUILTIN): Update.  Mention the
	new prototype.

From-SVN: r96762