avr.h (BRANCH_COST): Increase by 4.

gcc/
	* config/avr/avr.h (BRANCH_COST) [reload_completed]: Increase by 4.

From-SVN: r244488

gcc/ChangeLog

+2017-01-16  Georg-Johann Lay  <avr@gjlay.de>
+
+	* config/avr/avr.h (BRANCH_COST) [reload_completed]: Increase by 4.
+
 2017-01-15  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.c (ix86_legitimate_combined_insn): Do not

gcc/config/avr/avr.h

@@ -360,7 +360,12 @@ typedef struct avr_args
       }                                                                 \
   } while (0)
 
-#define BRANCH_COST(speed_p, predictable_p) avr_branch_cost
+/* We increase branch costs after reload in order to keep basic-block
+   reordering from introducing out-of-line jumps and to prefer fall-through
+   edges instead.  The default branch costs are 0, mainly because otherwise
+   do_store_flag might come up with bloated code.  */
+#define BRANCH_COST(speed_p, predictable_p)     \
+  (avr_branch_cost + (reload_completed ? 4 : 0))
 
 #define SLOW_BYTE_ACCESS 0