normal	2014-07-13 16:01:09 +0900 (Sun, 13 Jul 2014)

  New Revision: 46798

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=46798

  Log:
    vm_core.h (struct rb_iseq_struct): stack_max is uint32_t
    
    * vm_core.h (struct rb_iseq_struct): stack_max is uint32_t
      No program will ever need more than a few megabytes of stack,
      so there's no sense in using a 64-bit counter for stack
      accounting.  Packing this with the 32-bit type enum reduces
      rb_iseq_struct from 312 to 304 bytes on 64-bit systems.

  Modified files:
    trunk/ChangeLog
    trunk/vm_core.h
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 46797)
+++ ChangeLog	(revision 46798)
@@ -1,3 +1,7 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Sun Jul 13 15:53:25 2014  Eric Wong  <e@8...>
+
+	* vm_core.h (struct rb_iseq_struct): stack_max is uint32_t
+
 Sun Jul 13 10:56:26 2014  Nobuyoshi Nakada  <nobu@r...>
 
 	* configure.in (rb_cv_broken_backtrace): exit with failure
Index: vm_core.h
===================================================================
--- vm_core.h	(revision 46797)
+++ vm_core.h	(revision 46798)
@@ -204,6 +204,7 @@ struct rb_iseq_struct { https://github.com/ruby/ruby/blob/trunk/vm_core.h#L204
 	ISEQ_TYPE_MAIN,
 	ISEQ_TYPE_DEFINED_GUARD
     } type;              /* instruction sequence type */
+    uint32_t stack_max; /* for stack overflow check */
 
     rb_iseq_location_t location;
 
@@ -271,8 +272,6 @@ struct rb_iseq_struct { https://github.com/ruby/ruby/blob/trunk/vm_core.h#L272
     int arg_keyword_required;
     ID *arg_keyword_table;
 
-    size_t stack_max; /* for stack overflow check */
-
     /* catch table */
     struct iseq_catch_table_entry *catch_table;
     int catch_table_size;

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