src/hotspot/share/opto/graphKit.cpp

rev 53705 : 8217383: Obsolete UseImplicitStableValues
Reviewed-by: vlivanov

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2001, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -3880,14 +3880,10 @@
                                                   TypeAry::make(TypeInt::BYTE, TypeInt::POS),
                                                   ciTypeArrayKlass::make(T_BYTE), true, 0);
   Node* p = basic_plus_adr(str, str, value_offset);
   Node* load = access_load_at(str, p, value_field_type, value_type, T_OBJECT,
                               IN_HEAP | (set_ctrl ? C2_CONTROL_DEPENDENT_LOAD : 0) | MO_UNORDERED);
-  // String.value field is known to be @Stable.
-  if (UseImplicitStableValues) {
-    load = cast_array_to_stable(load, value_type);
-  }
   return load;
 }
 
 Node* GraphKit::load_String_coder(Node* str, bool set_ctrl) {
   if (!CompactStrings) {

@@ -3895,11 +3891,10 @@
   }
   int coder_offset = java_lang_String::coder_offset_in_bytes();
   const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(),
                                                      false, NULL, 0);
   const TypePtr* coder_field_type = string_type->add_offset(coder_offset);
-  int coder_field_idx = C->get_alias_index(coder_field_type);
 
   Node* p = basic_plus_adr(str, str, coder_offset);
   Node* load = access_load_at(str, p, coder_field_type, TypeInt::BYTE, T_BYTE,
                               IN_HEAP | (set_ctrl ? C2_CONTROL_DEPENDENT_LOAD : 0) | MO_UNORDERED);
   return load;

@@ -4033,11 +4028,5 @@
   if (con_type != NULL) {
     return makecon(con_type);
   }
   return NULL;
 }
-
-Node* GraphKit::cast_array_to_stable(Node* ary, const TypeAryPtr* ary_type) {
-  // Reify the property as a CastPP node in Ideal graph to comply with monotonicity
-  // assumption of CCP analysis.
-  return _gvn.transform(new CastPPNode(ary, ary_type->cast_to_stable(true)));
-}