iseq_inline_storage_entry: 24=>16 bytes on 64-bit

We may tag the running_thread pointer to avoid making the "once" struct
bigger than "struct iseq_inline_cache_entry".

This only saves a small amount with "valgrind ruby -e exit"
before:
  total heap usage: 48,122 allocs, 19,248 frees, 8,110,149 bytes allocated
after:
  total heap usage: 48,122 allocs, 19,253 frees, 8,099,197 bytes allocated

* insns.def (once): define and use fake RUNNING_THREAD_ONCE_DONE
  pointer to indicate is->once.running_thread is done.

* vm_core.h (iseq_inline_storage_entry): remove done field,
  allowing the union to be reduced from 24=>16 bytes on 64-bit

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47542 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 0 insertions, 1 deletions

diff --git a/vm_core.h b/vm_core.h
index 78396d12fb..1c3d0cc548 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -127,7 +127,6 @@ union iseq_inline_storage_entry {
     struct {
 	struct rb_thread_struct *running_thread;
 	VALUE value;
-	VALUE done;
     } once;
     struct iseq_inline_cache_entry cache;
 };