Allow direct allocation in old pointer space.

src/arm/macro-assembler-arm.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 642 matching lines @@
                    : -1;
     ASSERT((type == -1) ||
            ((FIRST_IC_MARKER <= type) && (type < LAST_CODE_MARKER)));
     return type;
   }
 
 
   // ---------------------------------------------------------------------------
   // Allocation support
 
-  // Allocate an object in new space. The object_size is specified
-  // either in bytes or in words if the allocation flag SIZE_IN_WORDS
-  // is passed. If the new space is exhausted control continues at the
-  // gc_required label. The allocated object is returned in result. If
-  // the flag tag_allocated_object is true the result is tagged as as
-  // a heap object. All registers are clobbered also when control
-  // continues at the gc_required label.
-  void AllocateInNewSpace(int object_size,
-                          Register result,
-                          Register scratch1,
-                          Register scratch2,
-                          Label* gc_required,
-                          AllocationFlags flags);
+  // Allocate an object in new space or old pointer space. The object_size is
+  // specified either in bytes or in words if the allocation flag SIZE_IN_WORDS
+  // is passed. If the space is exhausted control continues at the gc_required
+  // label. The allocated object is returned in result. If the flag
+  // tag_allocated_object is true the result is tagged as as a heap object.
+  // All registers are clobbered also when control continues at the gc_required
+  // label.
+  enum AllocationTarget {
+    NEW_SPACE,
+    OLD_POINTER_SPACE

[danno, 2013/03/05 12:18:18]

In general, is there any way to combine AllocationTarget with AllocationFlags?
Might be cleaner?

[Hannes Payer (out of office), 2013/03/11 17:16:31]

Done.

+  };
+
+  void Allocate(int object_size,
+                Register result,
+                Register scratch1,
+                Register scratch2,
+                Label* gc_required,
+                AllocationFlags flags,
+                AllocationTarget target);
+
   void AllocateInNewSpace(Register object_size,
                           Register result,
                           Register scratch1,
                           Register scratch2,
                           Label* gc_required,
                           AllocationFlags flags);
 
+  ExternalReference GetTopAddress(AllocationTarget target);
+  ExternalReference GetLimitAddress(AllocationTarget target);
+
   // Undo allocation in new space. The object passed and objects allocated after
   // it will no longer be allocated. The caller must make sure that no pointers
   // are left to the object(s) no longer allocated as they would be invalid when
   // allocation is undone.
   void UndoAllocationInNewSpace(Register object, Register scratch);
 
 
   void AllocateTwoByteString(Register result,
                              Register length,
                              Register scratch1,
@@ skipping 731 matching lines @@
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_MACRO_ASSEMBLER_ARM_H_