* bitmap.h (bitmap_and, bitmap_and_into, bitmap_and_compl,
	bitmap_and_compl_into, bitmap_ior, bitmap_iot_into,
	bitmap_ior_compl, bitmap_xor, bitmap_xor_into): Produce void.
	(bitmap_ior_and_compl_into): Produce bool.
	(bitmap_union_of_diff): Rename to ...
	(bitmap_ior_and_compl): ... here. Produce bool.
	* bitmap.c (bitmap_ior_and_compl_into): Return bool. Use
	bitmap_operation directly.
	(bitmap_union_of_diff): Rename to ...
	(bitmap_ior_and_compl): ... here. Return bool, use
	bitmap_operation directly.
	* df.c (df_rd_transfer_function): Use bitmap_ior_and_compl.
	(df_ru_transfer_function, df_lr_transfer_function): Likewise.
	* global.c (modify_bb_reg_pav): Likewise.

From-SVN: r89982