Refactor and improve inlined double-aligned allocations

src/macro-assembler.h

 // 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
@@ skipping 18 matching lines @@
 #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
+};
+
+
 // 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
@@ skipping 98 matching lines @@
 class Comment {
  public:
   Comment(MacroAssembler*, const char*)  {}
 };
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_MACRO_ASSEMBLER_H_