constraints.md: Adjust unused letters.

constraints.md: Adjust unused letters.

	* config/pa/constraints.md: Adjust unused letters.  Change "T"
	constraint to match_test floating_point_store_memory_operand().
	* config/pa/predicates.md (reg_plus_base_memory_operand): New.
	(base14_operand): New.
	(floating_point_store_memory_operand): New.
	(integer_store_memory_operand): Revise to use base14_operand and
	reg_plus_base_memory_operand.
	(move_dest_operand): Allow symbolic_memory_operands.
	(symbolic_memory_operand): Check for LO_SOM.
	(symbolic_operand): Change default case to break.
	* config/pa/pa.md: Remove unamed DFmode and SFmode patterns to force
	CONST_DOUBLE values to be reloaded by putting them into memory when
	the destination is a floating point register.
	(movdf): Remove code to handle CONST_DOUBLE.
	(movsf): Likewise.
	(reload_indf_r1): New.
	(reload_insf_r1): New.
	Consistently use "Q" and "T" constraints with integer and floating
	point move instructions, respectively.
	(movdi): Remove FAIL.
	Change predicate for source operand unamed DImode move from
	general_operand to move_src_operand.
	(umulsidi3): Change predicate for destination operand to
	register_operand.
	Likewise for similar unamed patterns.
	* config/pa/pa-protos.h (pa_legitimize_reload_address): Declare.
	* config/pa/pa.c (pa_symbolic_expression_p): Remove extra parenthesis.
	(hppa_legitimize_address): Simplify mask calculation.
	(pa_emit_move_sequence): Revised handling of secondary reloads from
	REG+D addresses for floating point loads and stores.  Directly handle
	loading CONST0_RTX (mode) to a floating point register.
	(pa_secondary_reload): Handle reloading DF and SFmode constant values
	to floating point registers.  Don't restrict secondary reloads to
	floating point registers to integer modes.  Revise some comments and
	cleanup some code.
	(TARGET_LEGITIMATE_ADDRESS_P): Define.
	(pa_legitimate_address_p): New.
	(pa_legitimize_reload_address): New.
	* config/pa/pa.h (STRICT_REG_OK_FOR_INDEX_P): New.
	(STRICT_REG_OK_FOR_BASE_P): New.
	(GO_IF_LEGITIMATE_ADDRESS): Delete.  Update some related comments.
	(LEGITIMIZE_RELOAD_ADDRESS): Revise to use pa_legitimize_reload_address.

From-SVN: r195702