Remove some dead code.

src/virtual-frame-light-inl.h

-// Copyright 2010 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_VIRTUAL_FRAME_LIGHT_INL_H_
-#define V8_VIRTUAL_FRAME_LIGHT_INL_H_
-
-#include "codegen.h"
-#include "register-allocator.h"
-#include "scopes.h"
-#include "type-info.h"
-
-#include "codegen-inl.h"
-#include "jump-target-light-inl.h"
-
-namespace v8 {
-namespace internal {
-
-VirtualFrame::VirtualFrame(InvalidVirtualFrameInitializer* dummy)
-    : element_count_(0),
-      top_of_stack_state_(NO_TOS_REGISTERS),
-      register_allocation_map_(0),
-      tos_known_smi_map_(0) { }
-
-
-// On entry to a function, the virtual frame already contains the receiver,
-// the parameters, and a return address.  All frame elements are in memory.
-VirtualFrame::VirtualFrame()
-    : element_count_(parameter_count() + 2),
-      top_of_stack_state_(NO_TOS_REGISTERS),
-      register_allocation_map_(0),
-      tos_known_smi_map_(0) { }
-
-
-// When cloned, a frame is a deep copy of the original.
-VirtualFrame::VirtualFrame(VirtualFrame* original)
-    : element_count_(original->element_count()),
-      top_of_stack_state_(original->top_of_stack_state_),
-      register_allocation_map_(original->register_allocation_map_),
-      tos_known_smi_map_(0) { }
-
-
-bool VirtualFrame::Equals(const VirtualFrame* other) {
-  ASSERT(element_count() == other->element_count());
-  if (top_of_stack_state_ != other->top_of_stack_state_) return false;
-  if (register_allocation_map_ != other->register_allocation_map_) return false;
-  if (tos_known_smi_map_ != other->tos_known_smi_map_) return false;
-
-  return true;
-}
-
-
-void VirtualFrame::PrepareForReturn() {
-  // Don't bother flushing tos registers as returning does not require more
-  // access to the expression stack.
-  top_of_stack_state_ = NO_TOS_REGISTERS;
-}
-
-
-VirtualFrame::RegisterAllocationScope::RegisterAllocationScope(
-    CodeGenerator* cgen)
-  : cgen_(cgen),
-    old_is_spilled_(
-        Isolate::Current()->is_virtual_frame_in_spilled_scope()) {
-  Isolate::Current()->set_is_virtual_frame_in_spilled_scope(false);
-  if (old_is_spilled_) {
-    VirtualFrame* frame = cgen->frame();
-    if (frame != NULL) {
-      frame->AssertIsSpilled();
-    }
-  }
-}
-
-
-VirtualFrame::RegisterAllocationScope::~RegisterAllocationScope() {
-  Isolate::Current()->set_is_virtual_frame_in_spilled_scope(old_is_spilled_);
-  if (old_is_spilled_) {
-    VirtualFrame* frame = cgen_->frame();
-    if (frame != NULL) {
-      frame->SpillAll();
-    }
-  }
-}
-
-
-CodeGenerator* VirtualFrame::cgen() const {
-  return CodeGeneratorScope::Current(Isolate::Current());
-}
-
-
-MacroAssembler* VirtualFrame::masm() { return cgen()->masm(); }
-
-
-void VirtualFrame::CallStub(CodeStub* stub, int arg_count) {
-  if (arg_count != 0) Forget(arg_count);
-  ASSERT(cgen()->HasValidEntryRegisters());
-  masm()->CallStub(stub);
-}
-
-
-int VirtualFrame::parameter_count() const {
-  return cgen()->scope()->num_parameters();
-}
-
-
-int VirtualFrame::local_count() const {
-  return cgen()->scope()->num_stack_slots();
-}
-
-
-int VirtualFrame::frame_pointer() const { return parameter_count() + 3; }
-
-
-int VirtualFrame::context_index() { return frame_pointer() - 1; }
-
-
-int VirtualFrame::function_index() { return frame_pointer() - 2; }
-
-
-int VirtualFrame::local0_index() const { return frame_pointer() + 2; }
-
-
-int VirtualFrame::fp_relative(int index) {
-  ASSERT(index < element_count());
-  ASSERT(frame_pointer() < element_count());  // FP is on the frame.
-  return (frame_pointer() - index) * kPointerSize;
-}
-
-
-int VirtualFrame::expression_base_index() const {
-  return local0_index() + local_count();
-}
-
-
-int VirtualFrame::height() const {
-  return element_count() - expression_base_index();
-}
-
-
-MemOperand VirtualFrame::LocalAt(int index) {
-  ASSERT(0 <= index);
-  ASSERT(index < local_count());
-  return MemOperand(fp, kLocal0Offset - index * kPointerSize);
-}
-
-} }  // namespace v8::internal
-
-#endif  // V8_VIRTUAL_FRAME_LIGHT_INL_H_