Second step in allocating objects in generated code on ARM

src/x64/macro-assembler-x64.h

-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// 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.
@@ skipping 42 matching lines @@
   IN_C_ENTRY
 };
 
 enum HandlerType {
   TRY_CATCH_HANDLER,
   TRY_FINALLY_HANDLER,
   JS_ENTRY_HANDLER
 };
 
 
+// Flags used for the AllocateObjectInNewSpace 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
+};
+
+
 // MacroAssembler implements a collection of frequently used macros.
 class MacroAssembler: public Assembler {
  public:
   MacroAssembler(void* buffer, int size);
 
   void LoadRoot(Register destination, Heap::RootListIndex index);
   void CompareRoot(Register with, Heap::RootListIndex index);
   void PushRoot(Heap::RootListIndex index);
 
   // ---------------------------------------------------------------------------
@@ skipping 163 matching lines @@
   // and result_end have not yet been tagged as heap objects. If
   // result_contains_top_on_entry is true the content of result is known to be
   // the allocation top on entry (could be result_end from a previous call to
   // AllocateObjectInNewSpace). If result_contains_top_on_entry is true scratch
   // should be no_reg as it is never used.
   void AllocateObjectInNewSpace(int object_size,
                                 Register result,
                                 Register result_end,
                                 Register scratch,
                                 Label* gc_required,
-                                bool result_contains_top_on_entry);
+                                AllocationFlags flags);
 
   void AllocateObjectInNewSpace(int header_size,
                                 ScaleFactor element_size,
                                 Register element_count,
                                 Register result,
                                 Register result_end,
                                 Register scratch,
                                 Label* gc_required,
-                                bool result_contains_top_on_entry);
+                                AllocationFlags flags);
 
   void AllocateObjectInNewSpace(Register object_size,
                                 Register result,
                                 Register result_end,
                                 Register scratch,
                                 Label* gc_required,
-                                bool result_contains_top_on_entry);
+                                AllocationFlags flags);
 
   // Undo allocation in new space. The object passed and objects allocated after
   // it will no longer be allocated. Make sure that no pointers are left to the
   // object(s) no longer allocated as they would be invalid when allocation is
   // un-done.
   void UndoAllocationInNewSpace(Register object);
 
   // ---------------------------------------------------------------------------
   // Support functions.
 
@@ skipping 111 matching lines @@
   Handle<Code> ResolveBuiltin(Builtins::JavaScript id, bool* resolved);
 
   // Activation support.
   void EnterFrame(StackFrame::Type type);
   void LeaveFrame(StackFrame::Type type);
 
   // Allocation support helpers.
   void LoadAllocationTopHelper(Register result,
                                Register result_end,
                                Register scratch,
-                               bool result_contains_top_on_entry);
+                               AllocationFlags flags);
   void UpdateAllocationTopHelper(Register result_end, Register scratch);
 };
 
 
 // The code patcher is used to patch (typically) small parts of code e.g. for
 // debugging and other types of instrumentation. When using the code patcher
 // the exact number of bytes specified must be emitted. Is not legal to emit
 // relocation information. If any of these constraints are violated it causes
 // an assertion.
 class CodePatcher {
@@ skipping 47 matching lines @@
   }                                                                       \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_