* compile.c (iseq_compile_each): emit opt_str_freeze if the #freeze

  method is called on a static string literal with no arguments.

* defs/id.def (firstline): add freeze so idFreeze is available

* insns.def (opt_str_freeze): add opt_str_freeze instruction which
  pushes a frozen string literal without allocating a new object if
  String#freeze is not overriden

* string.c (Init_String): define String#freeze

* vm.c (vm_init_redefined_flag): define BOP_FREEZE on String class as
  a basic operation

* vm_insnhelper.h: ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43627 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/vm_insnhelper.h b/vm_insnhelper.h
index 8870fca47c..c637407cbc 100644
--- a/vm_insnhelper.h
+++ b/vm_insnhelper.h
@@ -56,6 +56,7 @@ enum {
   BOP_NOT,
   BOP_NEQ,
   BOP_MATCH,
+  BOP_FREEZE,
 
   BOP_LAST_
 };