* cont.c (rb_fiber_s_new): revert initializing VM stack.

* yarvcore.c (th_init2): ditto.
* vm.c, vm.h: fix to stop using Qundef on VM stack.  According to
  this change, VM stack should not include Qundef value.
* insns.def (putundef): removed.
* compile.c (iseq_compile_each): ditto.
* eval.c (eval): fix spacing.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12621 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 7 deletions

diff --git a/vm.h b/vm.h
index e3e5ddd8c2..b3e311cb0f 100644
--- a/vm.h
+++ b/vm.h
@@ -222,16 +222,14 @@ default:                        \
 /*
   env{
     env[0] // special (block or prev env)
-    env[1] // orphan
-    env[2] // in heap
-    env[3] // env object
-    env[4] // prev env val
+    env[1] // env object
+    env[2] // prev env val
   };
  */
 
-#define ORPHAN_ENV_P(env)   ((env)[1] == Qundef)
-#define ENV_IN_HEAP_P(env)  ((env)[2] == Qundef)
-#define ENV_VAL(env)        ((env)[3])
+#define ENV_IN_HEAP_P(th, env)  \
+  (!((th)->stack < (env) && (env) < ((th)->stack + (th)->stack_size)))
+#define ENV_VAL(env)        ((env)[1])
 
 #define FRAME_MAGIC_METHOD 0xfaffff11
 #define FRAME_MAGIC_BLOCK  0xfaffff21