VM: Cache instructions entry point in RawFunction/RawCode.

runtime/vm/intermediate_language_ia32.cc

 // 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.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 6743 matching lines @@
 void ClosureCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   // Load arguments descriptors.
   intptr_t argument_count = ArgumentCount();
   const Array& arguments_descriptor =
       Array::ZoneHandle(ArgumentsDescriptor::New(argument_count,
                                                  argument_names()));
   __ LoadObject(EDX, arguments_descriptor);
 
   // EBX: Code (compiled code or lazy compile stub).
   ASSERT(locs()->in(0).reg() == EAX);
-  __ movl(EBX, FieldAddress(EAX, Function::instructions_offset()));
+  __ movl(EBX, FieldAddress(EAX, Function::entry_point_offset()));
 
   // EAX: Function.
   // EDX: Arguments descriptor array.
   // ECX: Smi 0 (no IC data; the lazy-compile stub expects a GC-safe value).
   __ xorl(ECX, ECX);
-  __ addl(EBX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
   __ call(EBX);
   compiler->RecordSafepoint(locs());
   // Marks either the continuation point in unoptimized code or the
   // deoptimization point in optimized code, after call.
   const intptr_t deopt_id_after = Isolate::ToDeoptAfter(deopt_id());
   if (compiler->is_optimizing()) {
     compiler->AddDeoptIndexAtCall(deopt_id_after, token_pos());
   }
   // Add deoptimization continuation point after the call and before the
   // arguments are removed.
@@ skipping 81 matching lines @@
   __ Drop(1);
   __ popl(result);
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_IA32