(ASM_OUTPUT_LOOP_ALIGN): Enable, now that assembler fixed.

(ASM_OUTPUT_LOOP_ALIGN): Enable, now that assembler fixed.

(SLOW_UNALIGNED_ACCESS): Define as 1.
(ARG_POINTER_REGNUM): Use register number 31 as an arg pointer.
(FRAME_GROWS_DOWNWARD): Do not define.
(STARTING_FRAME_OFFSET): Now is outgoing args size.
(FIRST_PARM_OFFSET): Now 0.
(ELIMINABLE_REGS, etc.): Cannot eliminate gp, but do eliminate AP in favor
of either SP or FP.
(RETURN_IN_MEMORY): All structs or integers larger than 64 bits get returned
via memory.
(SETUP_INCOMING_VARARGS): Use homed arglist mechanism.
(ASM_DECLARE_FUNCTION_NAME): Use proper second arg to .ent.
(ASM_FILE_START): Call alpha_write_verstamp.
(ENCODE_SECTION_INFO): Record when a decl is for a function in the current
file.

From-SVN: r3457