Merge from gomp-branch.
        * builtins.def: Move all DEF_SYNC_BUILTIN to ...
        * sync-builtins.def: ... new file.
        (BUILT_IN_FETCH_AND_ADD_16,
        BUILT_IN_FETCH_AND_SUB_16, BUILT_IN_FETCH_AND_OR_16,
        BUILT_IN_FETCH_AND_AND_16, BUILT_IN_FETCH_AND_XOR_16,
        BUILT_IN_FETCH_AND_NAND_16, BUILT_IN_ADD_AND_FETCH_16,
        BUILT_IN_SUB_AND_FETCH_16, BUILT_IN_OR_AND_FETCH_16,
        BUILT_IN_AND_AND_FETCH_16, BUILT_IN_XOR_AND_FETCH_16,
        BUILT_IN_NAND_AND_FETCH_16, BUILT_IN_BOOL_COMPARE_AND_SWAP_16,
        BUILT_IN_VAL_COMPARE_AND_SWAP_16, BUILT_IN_LOCK_TEST_AND_SET_16,
        BUILT_IN_LOCK_RELEASE_16): New builtins.
        * builtin-types.def (BT_I16, BT_FN_I16_VPTR_I16,
        BT_FN_BOOL_VPTR_I16_I16, BT_FN_I16_VPTR_I16_I16): Add.
        * builtins.c (expand_builtin): Handle sync BUILT_IN_*_16 builtins.
        * c-common.c (enum c_builtin_type): Move to top-level from
        c_common_nodes_and_builtins enum builtin_type.
        (builtin_types): Move from c_common_nodes_and_builtins.
        (def_fn_type): New.
        (c_common_nodes_and_builtins): Use it.
        (def_builtin_1): Check for error_mark_node.
        (sync_resolve_size): Handle also 128 bit sync builtins.
        * Makefile.in (BUILTINS_DEF): New.  Use it instead of builtins.def.

        * config/i386/i386.h (x86_cmpxchg8b, x86_cmpxchg16b): New decls.
        (TARGET_CMPXCHG8B, TARGET_CMPXCHG16B): Define.
        * config/i386/i386.c (x86_cmpxchg8b, x86_cmpxchg16b): New variables.
        * config/i386/sync.md (CASMODE, DCASMODE): New mode macros.
        (doublemodesuffix, DCASHMODE): New mode attrs.
        (sync_compare_and_swap<mode>): Change into expand, use CASMODE
        instead of IMODE, if mode is wider than a word, expand into
        sync_double_compare_and_swap*.
        (*sync_compare_and_swap<mode>): New insn.
        (sync_double_compare_and_swap<mode>): Likewise.
        (*sync_double_compare_and_swapdi_pic): Likewise.
        (sync_compare_and_swap_cc<mode>): Use CASMODE instead of IMODE, if
        mode is wider than a word, expand into
        sync_double_compare_and_swap_cc*.
        (sync_double_compare_and_swap_cc<mode>): New insn.
        (*sync_double_compare_and_swap_ccdi_pic): Likewise.

From-SVN: r108997