Remove more dead code.

src/frame-element.h

Index: src/frame-element.h
===================================================================
--- src/frame-element.h	(revision 7881)
+++ src/frame-element.h	(working copy)
@@ -1,270 +0,0 @@
-// Copyright 2009 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef V8_FRAME_ELEMENT_H_
-#define V8_FRAME_ELEMENT_H_
-
-#include "allocation.h"
-#include "type-info.h"
-#include "macro-assembler.h"
-#include "zone.h"
-
-namespace v8 {
-namespace internal {
-
-// -------------------------------------------------------------------------
-// Virtual frame elements
-//
-// The internal elements of the virtual frames.  There are several kinds of
-// elements:
-//   * Invalid: elements that are uninitialized or not actually part
-//     of the virtual frame.  They should not be read.
-//   * Memory: an element that resides in the actual frame.  Its address is
-//     given by its position in the virtual frame.
-//   * Register: an element that resides in a register.
-//   * Constant: an element whose value is known at compile time.
-
-class FrameElement BASE_EMBEDDED {
- public:
-  enum SyncFlag {
-    NOT_SYNCED,
-    SYNCED
-  };
-
-  inline TypeInfo type_info() {
-    // Copied elements do not have type info. Instead
-    // we have to inspect their backing element in the frame.
-    ASSERT(!is_copy());
-    return TypeInfo::FromInt(TypeInfoField::decode(value_));
-  }
-
-  inline void set_type_info(TypeInfo info) {
-    // Copied elements do not have type info. Instead
-    // we have to inspect their backing element in the frame.
-    ASSERT(!is_copy());
-    value_ = value_ & ~TypeInfoField::mask();
-    value_ = value_ | TypeInfoField::encode(info.ToInt());
-  }
-
-  // The default constructor creates an invalid frame element.
-  FrameElement() {
-    value_ = TypeField::encode(INVALID)
-        | CopiedField::encode(false)
-        | SyncedField::encode(false)
-        | TypeInfoField::encode(TypeInfo::Uninitialized().ToInt())
-        | DataField::encode(0);
-  }
-
-  // Factory function to construct an invalid frame element.
-  static FrameElement InvalidElement() {
-    FrameElement result;
-    return result;
-  }
-
-  // Factory function to construct an in-memory frame element.
-  static FrameElement MemoryElement(TypeInfo info) {
-    FrameElement result(MEMORY, no_reg, SYNCED, info);
-    return result;
-  }
-
-  // Factory function to construct an in-register frame element.
-  static FrameElement RegisterElement(Register reg,
-                                      SyncFlag is_synced,
-                                      TypeInfo info) {
-    return FrameElement(REGISTER, reg, is_synced, info);
-  }
-
-  // Factory function to construct a frame element whose value is known at
-  // compile time.
-  static FrameElement ConstantElement(Handle<Object> value,
-                                      SyncFlag is_synced) {
-    TypeInfo info = TypeInfo::TypeFromValue(value);
-    FrameElement result(value, is_synced, info);
-    return result;
-  }
-
-  static bool ConstantPoolOverflowed() {
-    return !DataField::is_valid(
-        Isolate::Current()->frame_element_constant_list()->length());
-  }
-
-  bool is_synced() const { return SyncedField::decode(value_); }
-
-  void set_sync() {
-    ASSERT(type() != MEMORY);
-    value_ = value_ | SyncedField::encode(true);
-  }
-
-  void clear_sync() {
-    ASSERT(type() != MEMORY);
-    value_ = value_ & ~SyncedField::mask();
-  }
-
-  bool is_valid() const { return type() != INVALID; }
-  bool is_memory() const { return type() == MEMORY; }
-  bool is_register() const { return type() == REGISTER; }
-  bool is_constant() const { return type() == CONSTANT; }
-  bool is_copy() const { return type() == COPY; }
-
-  bool is_copied() const { return CopiedField::decode(value_); }
-  void set_copied() { value_ = value_ | CopiedField::encode(true); }
-  void clear_copied() { value_ = value_ & ~CopiedField::mask(); }
-
-  // An untagged int32 FrameElement represents a signed int32
-  // on the stack.  These are only allowed in a side-effect-free
-  // int32 calculation, and if a non-int32 input shows up or an overflow
-  // occurs, we bail out and drop all the int32 values.
-  void set_untagged_int32(bool value) {
-    value_ &= ~UntaggedInt32Field::mask();
-    value_ |= UntaggedInt32Field::encode(value);
-  }
-  bool is_untagged_int32() const { return UntaggedInt32Field::decode(value_); }
-
-  Register reg() const {
-    ASSERT(is_register());
-    uint32_t reg = DataField::decode(value_);
-    Register result;
-    result.code_ = reg;
-    return result;
-  }
-
-  Handle<Object> handle() const {
-    ASSERT(is_constant());
-    return Isolate::Current()->frame_element_constant_list()->
-        at(DataField::decode(value_));
-  }
-
-  int index() const {
-    ASSERT(is_copy());
-    return DataField::decode(value_);
-  }
-
-  bool Equals(FrameElement other) {
-    uint32_t masked_difference = (value_ ^ other.value_) & ~CopiedField::mask();
-    if (!masked_difference) {
-      // The elements are equal if they agree exactly except on copied field.
-      return true;
-    } else {
-      // If two constants have the same value, and agree otherwise, return true.
-       return !(masked_difference & ~DataField::mask()) &&
-              is_constant() &&
-              handle().is_identical_to(other.handle());
-    }
-  }
-
-  // Test if two FrameElements refer to the same memory or register location.
-  bool SameLocation(FrameElement* other) {
-    if (type() == other->type()) {
-      if (value_ == other->value_) return true;
-      if (is_constant() && handle().is_identical_to(other->handle())) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  // Given a pair of non-null frame element pointers, return one of them
-  // as an entry frame candidate or null if they are incompatible.
-  FrameElement* Combine(FrameElement* other) {
-    // If either is invalid, the result is.
-    if (!is_valid()) return this;
-    if (!other->is_valid()) return other;
-
-    if (!SameLocation(other)) return NULL;
-    // If either is unsynced, the result is.
-    FrameElement* result = is_synced() ? other : this;
-    return result;
-  }
-
- private:
-  enum Type {
-    INVALID,
-    MEMORY,
-    REGISTER,
-    CONSTANT,
-    COPY
-  };
-
-  // Used to construct memory and register elements.
-  FrameElement(Type type,
-               Register reg,
-               SyncFlag is_synced,
-               TypeInfo info) {
-    value_ = TypeField::encode(type)
-        | CopiedField::encode(false)
-        | SyncedField::encode(is_synced != NOT_SYNCED)
-        | TypeInfoField::encode(info.ToInt())
-        | DataField::encode(reg.code_ > 0 ? reg.code_ : 0);
-  }
-
-  // Used to construct constant elements.
-  FrameElement(Handle<Object> value, SyncFlag is_synced, TypeInfo info) {
-    ZoneObjectList* constant_list =
-        Isolate::Current()->frame_element_constant_list();
-    value_ = TypeField::encode(CONSTANT)
-        | CopiedField::encode(false)
-        | SyncedField::encode(is_synced != NOT_SYNCED)
-        | TypeInfoField::encode(info.ToInt())
-        | DataField::encode(constant_list->length());
-    constant_list->Add(value);
-  }
-
-  Type type() const { return TypeField::decode(value_); }
-  void set_type(Type type) {
-    value_ = value_ & ~TypeField::mask();
-    value_ = value_ | TypeField::encode(type);
-  }
-
-  void set_index(int new_index) {
-    ASSERT(is_copy());
-    value_ = value_ & ~DataField::mask();
-    value_ = value_ | DataField::encode(new_index);
-  }
-
-  void set_reg(Register new_reg) {
-    ASSERT(is_register());
-    value_ = value_ & ~DataField::mask();
-    value_ = value_ | DataField::encode(new_reg.code_);
-  }
-
-  // Encode type, copied, synced and data in one 32 bit integer.
-  uint32_t value_;
-
-  // Declare BitFields with template parameters <type, start, size>.
-  class TypeField: public BitField<Type, 0, 3> {};
-  class CopiedField: public BitField<bool, 3, 1> {};
-  class SyncedField: public BitField<bool, 4, 1> {};
-  class UntaggedInt32Field: public BitField<bool, 5, 1> {};
-  class TypeInfoField: public BitField<int, 6, 7> {};
-  class DataField: public BitField<uint32_t, 13, 32 - 13> {};
-
-  friend class VirtualFrame;
-};
-
-} }  // namespace v8::internal
-
-#endif  // V8_FRAME_ELEMENT_H_