1 files changed, 14 insertions, 0 deletions
diff --git a/insns.def b/insns.def
index 6075d98db2..63a36b3979 100644
--- a/insns.def
+++ b/insns.def
@@ -999,6 +999,20 @@ send
     CALL_METHOD(ci);
 }
 
+DEFINE_INSN
+opt_str_freeze
+(VALUE str)
+()
+(VALUE val)
+{
+    if (BASIC_OP_UNREDEFINED_P(BOP_FREEZE, STRING_REDEFINED_OP_FLAG)) {
+	val = str;
+    }
+    else {
+	val = rb_funcall(rb_str_resurrect(str), idFreeze, 0);
+    }
+}
+
 /**
   @c optimize
   @e Invoke method without block, splat