[AArch64] Add cost handling of CALLER_SAVE_REGS and POINTER_REGS

2014-09-12  Wilco Dijkstra  <wdijkstr@arm.com>

  * gcc/config/aarch64/aarch64.c (aarch64_register_move_cost): Add cost handling
  of CALLER_SAVE_REGS and POINTER_REGS.

From-SVN: r215206

gcc/ChangeLog

 2014-09-12  Wilco Dijkstra  <wilco.dijkstra@arm.com>
 
+	* config/aarch64/aarch64.c (aarch64_register_move_cost): Add cost
+	handling of CALLER_SAVE_REGS and POINTER_REGS.
+
+2014-09-12  Wilco Dijkstra  <wilco.dijkstra@arm.com>
+
 	* gcc/ree.c (combine_reaching_defs): Ensure inserted copy don't change
 	the number of hard registers.
 

gcc/config/aarch64/aarch64.c

@@ -5932,6 +5932,13 @@ aarch64_register_move_cost (enum machine_mode mode,
   const struct cpu_regmove_cost *regmove_cost
     = aarch64_tune_params->regmove_cost;
 
+  /* Caller save and pointer regs are equivalent to GENERAL_REGS.  */
+  if (to == CALLER_SAVE_REGS || to == POINTER_REGS)
+    to = GENERAL_REGS;
+
+  if (from == CALLER_SAVE_REGS || from == POINTER_REGS)
+    from = GENERAL_REGS;
+
   /* Moving between GPR and stack cost is the same as GP2GP.  */
   if ((from == GENERAL_REGS && to == STACK_REG)
       || (to == GENERAL_REGS && from == STACK_REG))