Initial import.

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diff --git a/chromium/v8/src/macro-assembler.h b/chromium/v8/src/macro-assembler.h
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+// Copyright 2012 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_MACRO_ASSEMBLER_H_
+#define V8_MACRO_ASSEMBLER_H_
+
+
+// Helper types to make boolean flag easier to read at call-site.
+enum InvokeFlag {
+  CALL_FUNCTION,
+  JUMP_FUNCTION
+};
+
+
+// Flags used for the AllocateInNewSpace functions.
+enum AllocationFlags {
+  // No special flags.
+  NO_ALLOCATION_FLAGS = 0,
+  // Return the pointer to the allocated already tagged as a heap object.
+  TAG_OBJECT = 1 << 0,
+  // The content of the result register already contains the allocation top in
+  // new space.
+  RESULT_CONTAINS_TOP = 1 << 1,
+  // Specify that the requested size of the space to allocate is specified in
+  // words instead of bytes.
+  SIZE_IN_WORDS = 1 << 2,
+  // Align the allocation to a multiple of kDoubleSize
+  DOUBLE_ALIGNMENT = 1 << 3,
+  // Directly allocate in old pointer space
+  PRETENURE_OLD_POINTER_SPACE = 1 << 4,
+  // Directly allocate in old data space
+  PRETENURE_OLD_DATA_SPACE = 1 << 5
+};
+
+
+// Invalid depth in prototype chain.
+const int kInvalidProtoDepth = -1;
+
+#if V8_TARGET_ARCH_IA32
+#include "assembler.h"
+#include "ia32/assembler-ia32.h"
+#include "ia32/assembler-ia32-inl.h"
+#include "code.h"  // must be after assembler_*.h
+#include "ia32/macro-assembler-ia32.h"
+#elif V8_TARGET_ARCH_X64
+#include "assembler.h"
+#include "x64/assembler-x64.h"
+#include "x64/assembler-x64-inl.h"
+#include "code.h"  // must be after assembler_*.h
+#include "x64/macro-assembler-x64.h"
+#elif V8_TARGET_ARCH_ARM
+#include "arm/constants-arm.h"
+#include "assembler.h"
+#include "arm/assembler-arm.h"
+#include "arm/assembler-arm-inl.h"
+#include "code.h"  // must be after assembler_*.h
+#include "arm/macro-assembler-arm.h"
+#elif V8_TARGET_ARCH_MIPS
+#include "mips/constants-mips.h"
+#include "assembler.h"
+#include "mips/assembler-mips.h"
+#include "mips/assembler-mips-inl.h"
+#include "code.h"  // must be after assembler_*.h
+#include "mips/macro-assembler-mips.h"
+#else
+#error Unsupported target architecture.
+#endif
+
+namespace v8 {
+namespace internal {
+
+class FrameScope {
+ public:
+  explicit FrameScope(MacroAssembler* masm, StackFrame::Type type)
+      : masm_(masm), type_(type), old_has_frame_(masm->has_frame()) {
+    masm->set_has_frame(true);
+    if (type != StackFrame::MANUAL && type_ != StackFrame::NONE) {
+      masm->EnterFrame(type);
+    }
+  }
+
+  ~FrameScope() {
+    if (type_ != StackFrame::MANUAL && type_ != StackFrame::NONE) {
+      masm_->LeaveFrame(type_);
+    }
+    masm_->set_has_frame(old_has_frame_);
+  }
+
+  // Normally we generate the leave-frame code when this object goes
+  // out of scope.  Sometimes we may need to generate the code somewhere else
+  // in addition.  Calling this will achieve that, but the object stays in
+  // scope, the MacroAssembler is still marked as being in a frame scope, and
+  // the code will be generated again when it goes out of scope.
+  void GenerateLeaveFrame() {
+    masm_->LeaveFrame(type_);
+  }
+
+ private:
+  MacroAssembler* masm_;
+  StackFrame::Type type_;
+  bool old_has_frame_;
+};
+
+
+class AllowExternalCallThatCantCauseGC: public FrameScope {
+ public:
+  explicit AllowExternalCallThatCantCauseGC(MacroAssembler* masm)
+      : FrameScope(masm, StackFrame::NONE) { }
+};
+
+
+class NoCurrentFrameScope {
+ public:
+  explicit NoCurrentFrameScope(MacroAssembler* masm)
+      : masm_(masm), saved_(masm->has_frame()) {
+    masm->set_has_frame(false);
+  }
+
+  ~NoCurrentFrameScope() {
+    masm_->set_has_frame(saved_);
+  }
+
+ private:
+  MacroAssembler* masm_;
+  bool saved_;
+};
+
+
+// Support for "structured" code comments.
+#ifdef DEBUG
+
+class Comment {
+ public:
+  Comment(MacroAssembler* masm, const char* msg);
+  ~Comment();
+
+ private:
+  MacroAssembler* masm_;
+  const char* msg_;
+};
+
+#else
+
+class Comment {
+ public:
+  Comment(MacroAssembler*, const char*)  {}
+};
+
+#endif  // DEBUG
+
+
+class AllocationUtils {
+ public:
+  static ExternalReference GetAllocationTopReference(
+      Isolate* isolate, AllocationFlags flags) {
+    if ((flags & PRETENURE_OLD_POINTER_SPACE) != 0) {
+      return ExternalReference::old_pointer_space_allocation_top_address(
+          isolate);
+    } else if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) {
+      return ExternalReference::old_data_space_allocation_top_address(isolate);
+    }
+    return ExternalReference::new_space_allocation_top_address(isolate);
+  }
+
+
+  static ExternalReference GetAllocationLimitReference(
+      Isolate* isolate, AllocationFlags flags) {
+    if ((flags & PRETENURE_OLD_POINTER_SPACE) != 0) {
+      return ExternalReference::old_pointer_space_allocation_limit_address(
+          isolate);
+    } else if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) {
+      return ExternalReference::old_data_space_allocation_limit_address(
+          isolate);
+    }
+    return ExternalReference::new_space_allocation_limit_address(isolate);
+  }
+};
+
+
+} }  // namespace v8::internal
+
+#endif  // V8_MACRO_ASSEMBLER_H_