VM: Cache instructions entry point in RawFunction/RawCode.

runtime/vm/intrinsifier_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.
 //
 // The intrinsic code below is executed before a method has built its frame.
 // The return address is on the stack and the arguments below it.
 // Registers EDX (arguments descriptor) and ECX (function) must be preserved.
 // Each intrinsification method returns true if the corresponding
 // Dart method was intrinsified.
 
@@ skipping 2095 matching lines @@
   __ movl(EAX, FieldAddress(EBX, EDI, TIMES_4,
                             JSRegExp::function_offset(kOneByteStringCid)));
 
   // Registers are now set up for the lazy compile stub. It expects the function
   // in EAX, the argument descriptor in EDX, and IC-Data in ECX.
   static const intptr_t arg_count = RegExpMacroAssembler::kParamCount;
   __ LoadObject(EDX, Array::ZoneHandle(ArgumentsDescriptor::New(arg_count)));
   __ xorl(ECX, ECX);
 
   // Tail-call the function.
-  __ movl(EDI, FieldAddress(EAX, Function::instructions_offset()));
-  __ addl(EDI, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
+  __ movl(EDI, FieldAddress(EAX, Function::entry_point_offset()));
   __ jmp(EDI);
 }
 
 
 // On stack: user tag (+1), return-address (+0).
 void Intrinsifier::UserTag_makeCurrent(Assembler* assembler) {
   // RDI: Isolate.
   __ LoadIsolate(EDI);
   // EAX: Current user tag.
   __ movl(EAX, Address(EDI, Isolate::current_tag_offset()));
@@ skipping 19 matching lines @@
 void Intrinsifier::Profiler_getCurrentTag(Assembler* assembler) {
   __ LoadIsolate(EAX);
   __ movl(EAX, Address(EAX, Isolate::current_tag_offset()));
   __ ret();
 }
 
 #undef __
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32