* config/frv/frv.opt (moptimize-membar): New.

	* doc/invoke.texi: Document -moptimize-membar and its inverse.

	* config/frv/frv.h: Remove machine_function definition.

        * config/frv/frv.c (struct frv_io): New.
        (struct machine_function): Moved from frv.h.  Add has_membar_p.
        (frv_same_doubleword_p, frv_io_fixed_order_p, frv_io_union)
        (frv_extract_membar, frv_io_check_address, frv_io_handle_set)
        (frv_io_handle_use_1, frv_io_handle_use, frv_optimize_membar_local)
        (frv_optimize_membar_global, frv_optimize_membar): New functions.
        (frv_reorg): Call frv_optimize_membar when appropriate.
        (bdesc_loads, bdesc_stores): Use the membar code as the icode field.
        (frv_expand_builtin): Adjust calls accordingly.
        (frv_io_address_cookie): New function.
        (frv_expand_load_builtin, frv_expand_store_builtin): Emit a normal
        load or store rather than a special insn.  Add ccnstant address and
        io-type operands to the membar.
	(frv_ifcvt_modify_tests): Unsign regno.
	(frv_ifcvt_modify_tests): Same.

	* config/frv/frv.md: Remove UNSPEC_BUILTIN_{LOAD,STORE}.  Change
	UNSPEC_OPTIONAL_MEMBAR constant.
	(builtin_read_<mode>): Delete.
	(builtin_write_<mode>): Delete.
	("optional_membar_<mode>"): Add operand.

	* testsuite/gcc.target/frv/all-builtin-read8.c: Delete.
	* testsuite/gcc.target/frv/all-builtin-read16.c: Delete.
	* testsuite/gcc.target/frv/all-builtin-read32.c: Delete.
	* testsuite/gcc.target/frv/all-builtin-read64.c: Delete.
	* testsuite/gcc.target/frv/all-builtin-write8.c: Delete.
	* testsuite/gcc.target/frv/all-builtin-write16.c: Delete.
	* testsuite/gcc.target/frv/all-builtin-write32.c: Delete.
	* testsuite/gcc.target/frv/all-builtin-write64.c: Delete.
	* testsuite/gcc.target/frv/all-read-write-1.c: New.

From-SVN: r102455