# HG changeset patch
# User coleenp
# Date 1540236770 14400
# Node ID b705eb06588f14c88415b51a57643c339bfd1b29
# Parent  0b0ba3a2fec9d43adb002f8bdbc2b38b2f195b8f
8212774: Remove dead code touching Klass::_lower_dimension
Summary: Found dead code removal while looking at usage of Compile_lock. This dead code doesn't have Compile_lock but other code touching Klass::_{upper,lower}_dimension do.
Reviewed-by: shade

diff -r 0b0ba3a2fec9 -r b705eb06588f src/hotspot/share/oops/arrayKlass.hpp
--- a/src/hotspot/share/oops/arrayKlass.hpp	Mon Oct 22 12:43:15 2018 -0700
+++ b/src/hotspot/share/oops/arrayKlass.hpp	Mon Oct 22 15:32:50 2018 -0400
@@ -61,11 +61,9 @@
   inline Klass* higher_dimension_acquire() const; // load with acquire semantics
   void set_higher_dimension(Klass* k) { _higher_dimension = k; }
   inline void release_set_higher_dimension(Klass* k); // store with release semantics
-  Klass** adr_higher_dimension()      { return (Klass**)&this->_higher_dimension;}
 
   Klass* lower_dimension() const      { return _lower_dimension; }
   void set_lower_dimension(Klass* k)  { _lower_dimension = k; }
-  Klass** adr_lower_dimension()       { return (Klass**)&this->_lower_dimension;}
 
   // offset of first element, including any padding for the sake of alignment
   int  array_header_in_bytes() const    { return layout_helper_header_size(layout_helper()); }
diff -r 0b0ba3a2fec9 -r b705eb06588f src/hotspot/share/runtime/reflection.cpp
--- a/src/hotspot/share/runtime/reflection.cpp	Mon Oct 22 12:43:15 2018 -0700
+++ b/src/hotspot/share/runtime/reflection.cpp	Mon Oct 22 15:32:50 2018 -0400
@@ -326,13 +326,6 @@
   }
 }
 
-#ifdef ASSERT
-static oop basic_type_arrayklass_to_mirror(Klass* basic_type_arrayklass, TRAPS) {
-  BasicType type = TypeArrayKlass::cast(basic_type_arrayklass)->element_type();
-  return Universe::java_mirror(type);
-}
-#endif
-
 arrayOop Reflection::reflect_new_array(oop element_mirror, jint length, TRAPS) {
   if (element_mirror == NULL) {
     THROW_0(vmSymbols::java_lang_NullPointerException());
@@ -396,35 +389,6 @@
 }
 
 
-oop Reflection::array_component_type(oop mirror, TRAPS) {
-  if (java_lang_Class::is_primitive(mirror)) {
-    return NULL;
-  }
-
-  Klass* klass = java_lang_Class::as_Klass(mirror);
-  if (!klass->is_array_klass()) {
-    return NULL;
-  }
-
-  oop result = java_lang_Class::component_mirror(mirror);
-#ifdef ASSERT
-  oop result2 = NULL;
-  if (ArrayKlass::cast(klass)->dimension() == 1) {
-    if (klass->is_typeArray_klass()) {
-      result2 = basic_type_arrayklass_to_mirror(klass, CHECK_NULL);
-    } else {
-      result2 = ObjArrayKlass::cast(klass)->element_klass()->java_mirror();
-    }
-  } else {
-    Klass* lower_dim = ArrayKlass::cast(klass)->lower_dimension();
-    assert(lower_dim->is_array_klass(), "just checking");
-    result2 = lower_dim->java_mirror();
-  }
-  assert(oopDesc::equals(result, result2), "results must be consistent");
-#endif //ASSERT
-  return result;
-}
-
 static bool under_unsafe_anonymous_host(const InstanceKlass* ik, const InstanceKlass* unsafe_anonymous_host) {
   DEBUG_ONLY(int inf_loop_check = 1000 * 1000 * 1000);
   for (;;) {
diff -r 0b0ba3a2fec9 -r b705eb06588f src/hotspot/share/runtime/reflection.hpp
--- a/src/hotspot/share/runtime/reflection.hpp	Mon Oct 22 12:43:15 2018 -0700
+++ b/src/hotspot/share/runtime/reflection.hpp	Mon Oct 22 15:32:50 2018 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2018, 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
@@ -73,8 +73,6 @@
   // Reflective array access. Returns type code. Throws ArrayIndexOutOfBoundsException.
   static BasicType array_get(jvalue* value, arrayOop a, int index, TRAPS);
   static void      array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS);
-  // Returns mirror on array element type (NULL for basic type arrays and non-arrays).
-  static oop       array_component_type(oop mirror, TRAPS);
 
   // Object creation
   static arrayOop reflect_new_array(oop element_mirror, jint length, TRAPS);