[ARC] Cleanup unused functions.

Remove unused pieces of code.

gcc/
2018-03-06  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.c (arc_finalize_pic): Remove function.
	(arc_must_save_register): We use single base PIC register, remove
	checks to save/restore the PIC register.
	(arc_expand_prologue): Likewise.
	* config/arc/arc-protos.h (arc_set_default_type_attributes):
	Remove.
	(arc_verify_short): Likewise.
	(arc_attr_type): Likewise.
	* config/arc/arc.c (arc_set_default_type_attributes): Remove.
	(walk_stores): Likewise.
	(arc_address_cost): Make it static.
	(arc_verify_short): Likewise.
	(branch_dest): Likewise.
	(arc_attr_type): Likewise.
	* config/arc/arc.c (TARGET_ADJUST_INSN_LENGTH): Remove.
	(TARGET_INSN_LENGTH_PARAMETERS): Likewise.
	(arc_final_prescan_insn): Remove inserting the nops due to
	hardware hazards.  It is done in reorg step.
	(insn_length_variant_t): Remove.
	(insn_length_parameters_t): Likewise.
	(arc_insn_length_parameters): Likewise.
	(arc_get_insn_variants): Likewise.
	* config/arc/arc.h (TARGET_UPSIZE_DBR): Remove.

From-SVN: r258275

gcc/ChangeLog

+2018-03-06  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	 * config/arc/arc.c (arc_finalize_pic): Remove function.
+	 (arc_must_save_register): We use single base PIC register, remove
+	 checks to save/restore the PIC register.
+	 (arc_expand_prologue): Likewise.
+	 * config/arc/arc-protos.h (arc_set_default_type_attributes):
+	 Remove.
+	 (arc_verify_short): Likewise.
+	 (arc_attr_type): Likewise.
+	 * config/arc/arc.c (arc_set_default_type_attributes): Remove.
+	 (walk_stores): Likewise.
+	 (arc_address_cost): Make it static.
+	 (arc_verify_short): Likewise.
+	 (branch_dest): Likewise.
+	 (arc_attr_type): Likewise.
+	 * config/arc/arc.c (TARGET_ADJUST_INSN_LENGTH): Remove.
+	 (TARGET_INSN_LENGTH_PARAMETERS): Likewise.
+	 (arc_final_prescan_insn): Remove inserting the nops due to
+	 hardware hazards.  It is done in reorg step.
+	 (insn_length_variant_t): Remove.
+	 (insn_length_parameters_t): Likewise.
+	 (arc_insn_length_parameters): Likewise.
+	 (arc_get_insn_variants): Likewise.
+	 * config/arc/arc.h (TARGET_UPSIZE_DBR): Remove.
+
 2018-03-06  Jakub Jelinek  <jakub@redhat.com>
 
 	PR inline-asm/84683

gcc/config/arc/arc-protos.h

@@ -32,7 +32,6 @@ extern bool arc_double_limm_p (rtx);
 extern void arc_print_operand (FILE *, rtx, int);
 extern void arc_print_operand_address (FILE *, rtx);
 extern void arc_final_prescan_insn (rtx_insn *, rtx *, int);
-extern void arc_set_default_type_attributes(tree type);
 extern const char *arc_output_libcall (const char *);
 extern bool prepare_extend_operands (rtx *operands, enum rtx_code code,
 				     machine_mode omode);
@@ -97,10 +96,8 @@ extern void split_addsi (rtx *);
 extern void split_subsi (rtx *);
 extern void arc_pad_return (void);
 extern void arc_split_move (rtx *);
-extern int arc_verify_short (rtx_insn *insn, int unalign, int);
 extern const char *arc_short_long (rtx_insn *insn, const char *, const char *);
 extern rtx arc_regno_use_in (unsigned int, rtx);
-extern int arc_attr_type (rtx_insn *);
 extern bool arc_scheduling_not_expected (void);
 extern bool arc_sets_cc_p (rtx_insn *insn);
 extern int arc_label_align (rtx_insn *label);

gcc/config/arc/arc.h

@@ -141,9 +141,6 @@ extern const char *arc_cpu_to_as (int argc, const char **argv);
 /* Should we try to unalign likely taken branches without a delay slot.  */
 #define TARGET_UNALIGN_BRANCH (TARGET_ARC700 && !optimize_size)
 
-/* Should we upsize short delayed branches with a short delay insn?  */
-#define TARGET_UPSIZE_DBR (TARGET_ARC700 && !optimize_size)
-
 /* Should we add padding before a return insn to avoid mispredict?  */
 #define TARGET_PAD_RETURN (TARGET_ARC700 && !optimize_size)