[NDS32] Since we are going to provide new heuristic for fp-as-gp optimization,

        we better not to set cfun->machine->fp_as_gp_p at prologue expanding.

	* config/nds32/nds32.c (nds32_expand_prologue): Suppress fp-as-gp
	optimization detection.

From-SVN: r214866

gcc/ChangeLog

 2014-09-03  Chung-Ju Wu  <jasonwucj@gmail.com>
 
+	* config/nds32/nds32.c (nds32_expand_prologue): Suppress fp-as-gp
+	optimization detection.
+
+2014-09-03  Chung-Ju Wu  <jasonwucj@gmail.com>
+
 	* config/nds32/nds32.c (nds32_function_arg): Deal with nameless
 	arguments.
 	(nds32_function_arg_advance): Deal with nameless arguments.

gcc/config/nds32/nds32.c

@@ -2784,12 +2784,6 @@ nds32_expand_prologue (void)
   rtx Rb, Re;
   rtx fp_adjust_insn, sp_adjust_insn;
 
-  /* Before computing everything for stack frame size,
-     we check if it is still worth to use fp_as_gp optimization.
-     If it is, the 'df_regs_ever_live_p (FP_REGNUM)' will be set
-     so that $fp will be saved on stack.  */
-  cfun->machine->fp_as_gp_p = nds32_fp_as_gp_check_available ();
-
   /* Compute and setup stack frame size.
      The result will be in cfun->machine.  */
   nds32_compute_stack_frame ();
@@ -2993,12 +2987,6 @@ nds32_expand_prologue_v3push (void)
   rtx Rb, Re;
   rtx fp_adjust_insn, sp_adjust_insn;
 
-  /* Before computing everything for stack frame size,
-     we check if it is still worth to use fp_as_gp optimization.
-     If it is, the 'df_regs_ever_live_p (FP_REGNUM)' will be set
-     so that $fp will be saved on stack.  */
-  cfun->machine->fp_as_gp_p = nds32_fp_as_gp_check_available ();
-
   /* Compute and setup stack frame size.
      The result will be in cfun->machine.  */
   nds32_compute_stack_frame ();