nios2.h (FRAME_GROWS_DOWNWARD): Define to 1.

2017-10-28  Sandra Loosemore  <sandra@codesourcery.com>

	gcc/
	* config/nios2/nios2.h (FRAME_GROWS_DOWNWARD): Define to 1.
	* config/nios2/nios2.c (nios2_initial_elimination_offset):  Make
	FRAME_POINTER_REGNUM point at high end of local var area.

From-SVN: r254204

gcc/ChangeLog

+2017-10-28  Sandra Loosemore  <sandra@codesourcery.com>
+
+	* config/nios2/nios2.h (FRAME_GROWS_DOWNWARD): Define to 1.
+	* config/nios2/nios2.c (nios2_initial_elimination_offset):  Make
+	FRAME_POINTER_REGNUM point at high end of local var area.
+
 2017-10-27  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* bb-reorder.c (find_traces_1_round): Fix off-by-one index.

gcc/config/nios2/nios2.c

@@ -1114,7 +1114,9 @@ nios2_initial_elimination_offset (int from, int to)
   switch (from)
     {
     case FRAME_POINTER_REGNUM:
-      offset = cfun->machine->args_size;
+      /* This is the high end of the local variable storage, not the
+	 hard frame pointer.  */
+      offset = cfun->machine->args_size + cfun->machine->var_size;
       break;
 
     case ARG_POINTER_REGNUM:

gcc/config/nios2/nios2.h

@@ -252,6 +252,7 @@ enum reg_class
 
 /* Stack layout.  */
 #define STACK_GROWS_DOWNWARD 1
+#define FRAME_GROWS_DOWNWARD 1
 #define FIRST_PARM_OFFSET(FUNDECL) 0
 
 /* Before the prologue, RA lives in r31.  */