Check for a passed-in type argument vector in the prolog of generic functions.

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 749 matching lines @@
   // code below.
   ASSERT(kExitLinkSlotFromEntryFp == -7);
   __ movl(EDX, Address(THR, Thread::top_exit_frame_info_offset()));
   __ pushl(EDX);
   __ movl(Address(THR, Thread::top_exit_frame_info_offset()), Immediate(0));
 
   // Load arguments descriptor array into EDX.
   __ movl(EDX, Address(EBP, kArgumentsDescOffset));
   __ movl(EDX, Address(EDX, VMHandles::kOffsetOfRawPtrInHandle));
 
+  // No need to check for type args, disallowed by DartEntry::InvokeFunction.
   // Load number of arguments into EBX.
   __ movl(EBX, FieldAddress(EDX, ArgumentsDescriptor::count_offset()));
   __ SmiUntag(EBX);
 
   // Set up arguments for the dart call.
   Label push_arguments;
   Label done_push_arguments;
   __ testl(EBX, EBX);  // check if there are arguments.
   __ j(ZERO, &done_push_arguments, Assembler::kNearJump);
   __ movl(EAX, Immediate(0));
@@ skipping 1355 matching lines @@
 }
 
 
 void StubCode::GenerateAsynchronousGapMarkerStub(Assembler* assembler) {
   __ int3();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32