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

runtime/vm/stub_code_arm.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_ARM)
 
 #include "vm/assembler.h"
 #include "vm/compiler.h"
 #include "vm/cpu.h"
@@ skipping 828 matching lines @@
 #if defined(TARGET_OS_MACOS) || defined(TARGET_OS_MACOS_IOS)
   ASSERT(kExitLinkSlotFromEntryFp == -26);
 #else
   ASSERT(kExitLinkSlotFromEntryFp == -27);
 #endif
   __ Push(R9);
 
   // Load arguments descriptor array into R4, which is passed to Dart code.
   __ ldr(R4, Address(R1, VMHandles::kOffsetOfRawPtrInHandle));
 
+  // No need to check for type args, disallowed by DartEntry::InvokeFunction.
   // Load number of arguments into R9.
   __ ldr(R9, FieldAddress(R4, ArgumentsDescriptor::count_offset()));
   __ SmiUntag(R9);
 
   // Compute address of 'arguments array' data area into R2.
   __ ldr(R2, Address(R2, VMHandles::kOffsetOfRawPtrInHandle));
   __ AddImmediate(R2, Array::data_offset() - kHeapObjectTag);
 
   // Set up arguments for the Dart call.
   Label push_arguments;
@@ skipping 1467 matching lines @@
 }
 
 
 void StubCode::GenerateAsynchronousGapMarkerStub(Assembler* assembler) {
   __ bkpt(0);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM