Change the register allocator so that it no longer tracks references...

src/x64/register-allocator-x64-inl.h

+// 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_X64_REGISTER_ALLOCATOR_X64_INL_H_
+#define V8_X64_REGISTER_ALLOCATOR_X64_INL_H_
+
+#include "v8.h"
+
+namespace v8 {
+namespace internal {
+
+// -------------------------------------------------------------------------
+// RegisterAllocator implementation.
+
+bool RegisterAllocator::IsReserved(Register reg) {
+  // All registers are reserved for now.
+  return true;
+}
+
+
+// The register allocator uses small integers to represent the
+// non-reserved assembler registers.
+
+int RegisterAllocator::ToNumber(Register reg) {
+  ASSERT(reg.is_valid() && !IsReserved(reg));
+  UNIMPLEMENTED();
+  return -1;
+}
+
+
+Register RegisterAllocator::ToRegister(int num) {
+  ASSERT(num >= 0 && num < kNumRegisters);
+  UNIMPLEMENTED();
+  return no_reg;
+}
+
+
+void RegisterAllocator::Initialize() {
+  UNIMPLEMENTED();
+}
+
+
+} }  // namespace v8::internal
+
+#endif  // V8_X64_REGISTER_ALLOCATOR_X64_INL_H_