gc.c (struct heap_page): trivial packing

304 => 296 bytes on x86-64

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48391 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Thu Nov 13 03:56:38 2014  Eric Wong  <e@80x24.org>
+
+	* gc.c (struct heap_page): trivial packing
+	  304 => 296 bytes on x86-64
+
 Wed Nov 12 22:50:12 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* gems/bundled_gems: Update to test-unit 3.0.6 and minitest 5.4.3.

gc.c

@@ -613,18 +613,17 @@ struct heap_page {
     int total_slots;
     int free_slots;
     int final_slots;
-
-    struct heap_page *free_next;
-    RVALUE *start;
-    RVALUE *freelist;
-    struct heap_page *next;
-
     struct {
 	unsigned int before_sweep : 1;
 	unsigned int has_remembered_objects : 1;
 	unsigned int has_long_lived_shady_objects : 1;
     } flags;
 
+    struct heap_page *free_next;
+    RVALUE *start;
+    RVALUE *freelist;
+    struct heap_page *next;
+
 #if USE_RGENGC
     bits_t wb_unprotected_bits[HEAP_BITMAP_LIMIT];
 #endif