VM: Cache instructions entry point in RawFunction/RawCode.

runtime/vm/intermediate_language_mips.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_MIPS.
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 254 matching lines @@
   const Array& arguments_descriptor =
       Array::ZoneHandle(ArgumentsDescriptor::New(argument_count,
                                                  argument_names()));
   __ LoadObject(S4, arguments_descriptor);
 
   // Load closure function code in T2.
   // S4: arguments descriptor array.
   // S5: Smi 0 (no IC data; the lazy-compile stub expects a GC-safe value).
   ASSERT(locs()->in(0).reg() == T0);
   __ LoadImmediate(S5, 0);
-  __ lw(T2, FieldAddress(T0, Function::instructions_offset()));
-  __ AddImmediate(T2, Instructions::HeaderSize() - kHeapObjectTag);
+  __ lw(T2, FieldAddress(T0, Function::entry_point_offset()));
   __ jalr(T2);
   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 5305 matching lines @@
                                 1,
                                 locs());
   __ lw(result, Address(SP, 1 * kWordSize));
   __ addiu(SP, SP, Immediate(2 * kWordSize));
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS