* config/i386/i386.c (x86_64_reg_class_name): Re-indent.
        (classify_argument, examine_argument, construct_container,
        merge_classes): Remove prototypes.
        (type_natural_mode): Split out from ...
        (function_arg): ... here.
        (gen_reg_or_parallel): Remove alt_mode argument.  Update callers.
        Use orig_mode unless it's BLKmode.
        (construct_container): Add orig_mode argument.  Update callers.
        Use gen_reg_or_parallel for SSE registers.
        (ix86_function_value): Use type_natural_mode.
        (ix86_gimplify_va_arg): Likewise.
        (ix86_hard_regno_mode_ok): Always accept all SSE, MMX, 3DNOW modes in
        SSE registers; always accept all MMX, 3DNOW modes in MMX registers.
        * config/i386/i386.h (VALID_SSE2_REG_MODE): Don't include
        VALID_MMX_REG_MODE.
        * config/i386/i386.md (attribute mode): Add V1DF.
        (movsi_1): Use 'x' instead of 'Y' constraints.
        (movsi_1_nointernunit, movdi_2, movdi_1_rex64): Likewise.
        (movdi_1_rex64_nointerunit): Likewise.
        (movdf_nointeger, movdf_integer): Likewise.  Handle SSE1.
        (movsf_1, movsf_1_nointerunit): Line up constraint alternatives.
        (swapsf): Use fp_register_operand, don't disable for TARGET_SSE.
        (swapdf): Likewise.
        (swapxf): Enable only for TARGET_80387.
        (movv2sf, movv2sf_internal, pushv2sf): Enable for MMX.
        (movtf): Remove double-check for TARGET_64BIT.
        (movv2df_internal): Enable for SSE1.
        (movv8hi_internal, movv16qi_internal): Likewise.
        (movv2df, movv8hi, movv16qi): Likewise.
        (pushv2di, pushv8hi, pushv16qi, pushv4si): Likewise.
        (pushdi2_rex64, movv4sf_internal, movv4si_internal, movv2di_internal,
        movv8qi_internal, movv4hi_internal, movv2sf_internal,
        movv2df_internal, movv8hi_internal, movv16qi_internal,
        movti_internal): Add leading '*' to name.

From-SVN: r92336