vm_core.h (rb_env_t): use flexible array

* vm_core.h (rb_env_t): use flexible array
  This reduces allocations and speeds up the lambda calculus
  fizzbuzz (bm_app_lc_fizzbuzz.rb) benchmark [ruby-core:64858]
* proc.c (get_local_variable_ptr): deconst to adjust for flex array
* vm.c (env_mark, env_free, env_memsize): remove check for env->env
* vm.c (env_alloc): single allocation for flex array
* vm.c (vm_make_env_each): adjust env_alloc call

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47453 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/vm_core.h b/vm_core.h
index 1afa1b2914..939fd87d9d 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -753,11 +753,11 @@ typedef struct {
   GetCoreDataFromValue((obj), rb_env_t, (ptr))
 
 typedef struct {
-    VALUE *env;
     int env_size;
     int local_size;
     VALUE prev_envval;		/* for GC mark */
     rb_block_t block;
+    VALUE env[1];               /* flexible array */
 } rb_env_t;
 
 extern const rb_data_type_t ruby_binding_data_type;