Support old-space allocation in generated code (bump block only for now).

runtime/vm/assembler_x64.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_X64_H_
 #define VM_ASSEMBLER_X64_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_x64.h directly; use assembler.h instead.
 #endif
@@ skipping 853 matching lines @@
   //   pushq rbp          (size is 1 byte)
   //   movq rbp, rsp      (size is 3 bytes)
   //   call L             (size is 5 bytes)
   //   L:
   static const intptr_t kEntryPointToPcMarkerOffset = 9;
   static intptr_t EntryPointToPcMarkerOffset() {
     return kEntryPointToPcMarkerOffset;
   }
 
   void UpdateAllocationStats(intptr_t cid,
-                             Heap::Space space = Heap::kNew);
+                             Heap::Space space);
 
   void UpdateAllocationStatsWithSize(intptr_t cid,
                                      Register size_reg,
-                                     Heap::Space space = Heap::kNew);
+                                     Heap::Space space);
   void UpdateAllocationStatsWithSize(intptr_t cid,
                                      intptr_t instance_size,
-                                     Heap::Space space = Heap::kNew);
+                                     Heap::Space space);
 
   // Inlined allocation of an instance of class 'cls', code has no runtime
   // calls. Jump to 'failure' if the instance cannot be allocated here.
   // Allocated instance is returned in 'instance_reg'.
   // Only the tags field of the object is initialized.
   // Loads large immediates from the object pool with pool pointer in PP if it
   // is not kNoRegister
   void TryAllocate(const Class& cls,
                    Label* failure,
                    bool near_jump,
@@ skipping 235 matching lines @@
 }
 
 
 inline void Assembler::EmitOperandSizeOverride() {
   EmitUint8(0x66);
 }
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_X64_H_