[ARC] Define ADDITIONAL_REGISTER_NAMES.

This macro is needed to be used with -ffixed-<reg> option, and inline asm.

gcc/
2017-07-10  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.h (ADDITIONAL_REGISTER_NAMES): Define.

From-SVN: r250095

gcc/ChangeLog

+2017-07-10  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	* config/arc/arc.h (ADDITIONAL_REGISTER_NAMES): Define.
+
 2017-07-07  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR lto/80838

gcc/config/arc/arc.h

@@ -1262,6 +1262,13 @@ extern char rname56[], rname57[], rname58[], rname59[];
   "lp_start", "lp_end" \
 }
 
+#define ADDITIONAL_REGISTER_NAMES		\
+{						\
+  {"ilink",  29},				\
+  {"r29",    29},				\
+  {"r30",    30}				\
+}
+
 /* Entry to the insn conditionalizer.  */
 #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \
   arc_final_prescan_insn (INSN, OPVEC, NOPERANDS)