Ruby » Ruby master

• make rb_iseq_t T_IMEMO object (type is imemo_iseq).
  All contents of previous rb_iseq_t is in rb_iseq_t::body.
  Remove rb_iseq_t::self because rb_iseq_t is an object.
  RubyVM::InstructionSequence is wrapper object points T_IMEMO/iseq.
  So RubyVM::ISeq.of(something) method returns different wrapper
  objects but they point the same T_IMEMO/iseq object.
  This patch is big, but most of difference is replacement of
  iseq->xxx to iseq->body->xxx.
  (previous) rb_iseq_t::compile_data is also located to
  rb_iseq_t::compile_data.
  It was moved from rb_iseq_body::compile_data.
  Now rb_iseq_t has empty two pointers.
  I will split rb_iseq_body data into static data and dynamic data.
• compile.c: rename some functions/macros.
  Now, we don't need to separate iseq and iseqval (only VALUE).
• eval.c (ruby_exec_internal): `n' is rb_iseq_t (T_IMEMO/iseq).
• ext/objspace/objspace.c (count_imemo_objects): count T_IMEMO/iseq.
• gc.c: check T_IMEMO/iseq.
• internal.h: add imemo_type::imemo_iseq.
• iseq.c: define RubyVM::InstructionSequnce as T_OBJECT.
  Methods are implemented by functions named iseqw_....
• load.c (rb_load_internal0): rb_iseq_new_top() returns
  rb_iseq_t (T_IMEMO/iesq).
• method.h (rb_add_method_iseq): accept rb_iseq_t (T_IMEMO/iseq).
• vm_core.h (GetISeqPtr): removed because it is not T_DATA now.
• vm_core.h (struct rb_iseq_body): remove padding for
  [Bug #10037][ruby-core:63721].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51327 b2dd03c8-39d4-4d8f-98ff-823fe69b080e