Implement Objects on VWA

This commit implements Objects on Variable Width Allocation. This allows
Objects with more ivars to be embedded (i.e. contents directly follow the
object header) which improves performance through better cache locality.

1 files changed, 2 insertions, 0 deletions

diff --git a/debug.c b/debug.c
index 6b5684efb2..d927f72231 100644
--- a/debug.c
+++ b/debug.c
@@ -53,7 +53,9 @@ const union {
     rb_econv_result_t           econv_result;
     enum ruby_preserved_encindex encoding_index;
     enum ruby_robject_flags     robject_flags;
+#if !USE_RVARGC
     enum ruby_robject_consts    robject_consts;
+#endif
     enum ruby_rmodule_flags     rmodule_flags;
     enum ruby_rstring_flags     rstring_flags;
 #if !USE_RVARGC