Convert all direct memory references to use LO_SUM and remove machdep

Convert all direct memory references to use LO_SUM and remove machdep
hack that used to do this.
Sun Jan 24 21:24:43 1999  Michael Hayes  <m.hayes@elec.canterbury.ac.nz>
	* config/c4x/c4x.c (c4x_emit_move_sequence, c4x_encode_section_info):
	New functions.
	(c4x_check_legit_addr): Remove USE and PLUS, allow
	LO_SUM, and disable SYMBOL_REF, LABEL_REF, and CONST cases.
	(c4x_legitimize_address): Penalise SYMBOL_REF, LABEL_REF, and
	CONST cases.  Add LO_SUM.
	(c4x_print_operand): Modified 'C' and 'R' cases for calls.
	Added 'U' case.  Remove dependence on SYMBOL_REF_FLAG.
	(c4x_print_operand_address): Handle LO_SUM.
	(c4x_scan_for_ldp): Delete.  Hooray!
	(c4x_process_after_reload): Remove call to c4x_scan_for_ldp.
	Split all insns.
	(c4x_immed_int_constant): Renamed from c4x_int_constant.  All callers
	changed.
	(c4x_immed_float_constant): Renamed from c4x_float_constant.  All
 	callers	changed.
	(c4x_T_constraint): Allow LO_SUM, disable SYMBOL_REF, LABEL_REF,
	and CONST.
	(c4x_U_constraint, symbolic_operand): New functions.
	(src_operand): Allow 'I' constants in HImode.  Allow LO_SUM,
	disable SYMBOL_REF, LABEL_REF, and CONST.
	(lsrc_operand, tsrc_operand): Call src_operand instead of
	general_operand.
	(c4x_operand_subword): Update comments.
	* config/c4x/c4x.c (TARGET_LOAD_ADDRESS): New macro.
	(LEGITIMATE_CONSTANT_P): Allow SYMBOL_REF, LABEL_REF, CONST,
	plus HIGH and LO_SUM for the C40.
	(ENCODE_SECTION_INFO): Define macro.
	(symbolic_operand, c4x_U_constraint, c4x_emit_move_sequence): New
	prototypes.
	(PREDICATE_CODES): Add symbolic_operand.
	* config/c4x/c4x.md (movqi, movgqf, movhi, movhi): Call
	c4x_emit_move_sequence.
	(floatunsqiqf2, fixuns_truncqfqi2): Rework emitted RTL
	to avoid symbol references.
	(all patterns with g constraint): Replace 'g' constraint with 'rIm'.
	(set_high): Renamed from set_high_use.
	(set_lo_sum): Renamed from set_ior_lo_use.
	(all call patterns): Make MEM explicit in call address operands.
	Modified output templates to use 'U' modifier.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@24842 138bc75d-0d04-0410-961f-82ee72b054a4