- Inline the store buffer update into a stub instead of

runtime/vm/assembler_ia32.cc

 // Copyright (c) 2011, 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.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/assembler.h"
 #include "vm/heap.h"
 #include "vm/memory_region.h"
 #include "vm/runtime_entry.h"
 #include "vm/stub_code.h"
 
 namespace dart {
 
-DECLARE_RUNTIME_ENTRY(StoreBuffer);
-
 DEFINE_FLAG(bool, print_stop_message, true, "Print stop message.");
 DEFINE_FLAG(bool, code_comments, false,
             "Include comments into code and disassembly");
 
 
 class DirectCallRelocation : public AssemblerFixup {
  public:
   void Process(const MemoryRegion& region, int position) {
     // Direct calls are relative to the following instruction on x86.
     int32_t pointer = region.Load<int32_t>(position);
@@ skipping 1365 matching lines @@
   Label done;
   // Check that 'value' is a new object.  Store buffer updates are not
   // required when storing a smi or an old object.
   testl(value, Immediate(kNewObjectAlignmentOffset | kHeapObjectTag));
   j(PARITY_ODD, &done, Assembler::kNearJump);
   // Check that 'object' is an old object.  A store buffer update is
   // not required when storing into a new object.
   testl(object, Immediate(kNewObjectAlignmentOffset));
   j(NOT_ZERO, &done, Assembler::kNearJump);
   // A store buffer update is required.
-  pushal();
-  movl(EBP, ESP);
-  ReserveAlignedFrameSpace(kWordSize);
-  movl(EAX, dest);
-  movl(Address(ESP, 0), EAX);  // Push argument
-  CallRuntime(kStoreBufferRuntimeEntry);
-  movl(ESP, EBP);
-  popal();
+  pushl(EAX);  // Preserve EAX.
+  leal(EAX, dest);
+  call(&StubCode::UpdateStoreBufferLabel());
+  popl(EAX);  // Restore EAX.
   Bind(&done);
 }
 
 
 void Assembler::StoreIntoObjectNoBarrier(Register object,
                                          const FieldAddress& dest,
                                          Register value) {
   movl(dest, value);
 #if 0  // TODO(cshapiro) Turn this back on after it is fixed defined(DEBUG).
   Label done;
@@ skipping 310 matching lines @@
     comments.SetCommentAt(i, comments_[i]->comment());
   }
 
   return comments;
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32