* rtlanal.c (operand_preference): Fix preference for objects.

	* gcse.c (handle_avail_expr): Be prepared to handle single_set
	parallels.

	* combine.c (if_then_else_cond): Use simplify_subreg instead
	of operand_subword.
	* integreate.c (sub_constants): Likewise.

	* emit-rtl.c (constant_subword): Deprecate; remove most of code
	and use simplify_gen_subreg.

Mon Jun  4 19:55:23 CEST 2001  Lars Brinkhoff  <lars@nocrew.org>

	* sibcall.c (skip_copy_to_return_value): recognize the situation
	when the called function's return value is copied into an
	intermediate pseudo, and then into the calling functions return
	value register.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@42864 138bc75d-0d04-0410-961f-82ee72b054a4