gcc/
	* rtl.h (mem_attrs): Turn offset and size fields into HOST_WIDE_INTs.
	Add offset_known_p and size_known_p fields.
	(MEM_OFFSET_KNOWN_P): Update accordingly.
	(MEM_OFFSET, MEM_SIZE_KNOWN_P, MEM_SIZE): Likewise.
	* emit-rtl.c (mem_attrs_htab_hash): Update after mem_attrs changes.
	(mem_attrs_eq_p, set_mem_attributes_minus_bitpos, set_mem_offset)
	(clear_mem_offset, set_mem_size, clear_mem_size, change_address)
	(adjust_address_1, widen_memory_access, set_mem_attrs_for_spill)
	(init_emit_regs): Likewise.

From-SVN: r176478