re PR target/57844 (ICE: unrecognizable addqi3 insn with -msp8 and frame size of 128 bytes)

	PR target/57844
	* config/avr/avr.c (avr_prologue_setup_frame): Trunk -size to mode
	of my_fp.

From-SVN: r200872

gcc/ChangeLog

 2013-07-10  Georg-Johann Lay  <avr@gjlay.de>
 
+	PR target/57844
+	* config/avr/avr.c (avr_prologue_setup_frame): Trunk -size to mode
+	of my_fp.
+
+2013-07-10  Georg-Johann Lay  <avr@gjlay.de>
+
 	PR target/57506
 	* config/avr/avr-mcus.def (atmega16hva, atmega16hva2, atmega16hvb)
 	(atmega16m1, atmega16u4, atmega32a, atmega32c1, atmega32hvb)

gcc/config/avr/avr.c

@@ -1112,7 +1112,7 @@ avr_prologue_setup_frame (HOST_WIDE_INT size, HARD_REG_SET set)
               leaf function and thus X has already been saved.  */
 
           int irq_state = -1;
-          HOST_WIDE_INT size_cfa = size;
+          HOST_WIDE_INT size_cfa = size, neg_size;
           rtx fp_plus_insns, fp, my_fp;
 
           gcc_assert (frame_pointer_needed
@@ -1151,6 +1151,7 @@ avr_prologue_setup_frame (HOST_WIDE_INT size, HARD_REG_SET set)
             }
 
           size = trunc_int_for_mode (size, GET_MODE (my_fp));
+          neg_size = trunc_int_for_mode (-size, GET_MODE (my_fp));
 
           /************  Method 1: Adjust frame pointer  ************/
 
@@ -1171,7 +1172,8 @@ avr_prologue_setup_frame (HOST_WIDE_INT size, HARD_REG_SET set)
             }
 
           insn = emit_move_insn (my_fp, plus_constant (GET_MODE (my_fp),
-                                                       my_fp, -size));
+                                                       my_fp, neg_size));
+
           if (frame_pointer_needed)
             {
               RTX_FRAME_RELATED_P (insn) = 1;