alias.c (reg_known_value): Make this a VEC.

alias.c (reg_known_value): Make this a VEC.

	* alias.c (reg_known_value): Make this a VEC.
	(reg_known_equiv_p): Make this an sbitmap.
	(reg_known_value_size): Remove.
	(get_reg_known_value, set_reg_known_value, get_reg_known_equiv_p,
	set_reg_known_equiv_p): Update for reg_known_value and
	reg_known_value_size data structure change.
	(init_alias_analysis, end_alias_analysis): Likewise.

From-SVN: r187953