Remove dead code from InvokeDartCode stub.

runtime/vm/stub_code_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"
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/assembler.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
@@ skipping 861 matching lines @@
   __ movl(ECX, Address(EDI, EAX, TIMES_4, 0));
   __ pushl(ECX);
   __ incl(EAX);
   __ cmpl(EAX, EBX);
   __ j(LESS, &push_arguments, Assembler::kNearJump);
   __ Bind(&done_push_arguments);
 
   // Call the dart code entrypoint.
   __ call(Address(EBP, kEntryPointOffset));
 
-  // Reread the Context pointer.
-  __ movl(CTX, Address(EBP, kNewContextOffset));
-  __ movl(CTX, Address(CTX, VMHandles::kOffsetOfRawPtrInHandle));
-
   // Reread the arguments descriptor array to obtain the number of passed
   // arguments.
   __ movl(EDX, Address(EBP, kArgumentsDescOffset));
   __ movl(EDX, Address(EDX, VMHandles::kOffsetOfRawPtrInHandle));
   __ movl(EDX, FieldAddress(EDX, ArgumentsDescriptor::count_offset()));
   // Get rid of arguments pushed on the stack.
   __ leal(ESP, Address(ESP, EDX, TIMES_2, 0));  // EDX is a Smi.
 
-  // Load Isolate pointer into CTX. Drop Context.
+  // Load Isolate pointer into CTX.
   __ LoadIsolate(CTX);
 
   // Restore the saved Context pointer into the Isolate structure.
   __ popl(Address(CTX, Isolate::top_context_offset()));
 
   // Restore the saved top exit frame info back into the Isolate structure.
   __ popl(Address(CTX, Isolate::top_exit_frame_info_offset()));
 
   // Restore the current VMTag from the stack.
   __ popl(Address(CTX, Isolate::vm_tag_offset()));
@@ skipping 1175 matching lines @@
   const Register temp = ECX;
   __ movl(left, Address(ESP, 2 * kWordSize));
   __ movl(right, Address(ESP, 1 * kWordSize));
   GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp);
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32