Remove numiv from RObject

Since object shapes store the capacity of an object, we no longer
need the numiv field on RObjects. This gives us one extra slot which
we can use to give embedded objects one more instance variable (for a
total of 3 ivs). This commit removes the concept of numiv from RObject.

1 files changed, 1 insertions, 1 deletions

diff --git a/vm_core.h b/vm_core.h
index 579812e37f..3364089f79 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -253,7 +253,7 @@ struct iseq_inline_constant_cache_entry {
 };
 STATIC_ASSERT(sizeof_iseq_inline_constant_cache_entry,
               (offsetof(struct iseq_inline_constant_cache_entry, ic_cref) +
-               sizeof(const rb_cref_t *)) <= sizeof(struct RObject));
+               sizeof(const rb_cref_t *)) <= RVALUE_SIZE);
 
 struct iseq_inline_constant_cache {
     struct iseq_inline_constant_cache_entry *entry;