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

runtime/vm/intermediate_language_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"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/compiler.h"
@@ skipping 2331 matching lines @@
   __ LoadObject(EDI, type_arguments());
   __ movl(EDI, FieldAddress(EDI, TypeArguments::instantiations_offset()));
   __ leal(EDI, FieldAddress(EDI, Array::data_offset()));
   // The instantiations cache is initialized with Object::zero_array() and is
   // therefore guaranteed to contain kNoInstantiator. No length check needed.
   Label loop, next, found, slow_case;
   __ Bind(&loop);
   __ movl(EDX, Address(EDI, 0 * kWordSize));  // Cached instantiator type args.
   __ cmpl(EDX, instantiator_type_args_reg);
   __ j(NOT_EQUAL, &next, Assembler::kNearJump);
-  __ movl(ECX, Address(EDI, 1 * kWordSize));  // Cached function type args.
-  __ cmpl(ECX, function_type_args_reg);
+  __ movl(EBX, Address(EDI, 1 * kWordSize));  // Cached function type args.
+  __ cmpl(EBX, function_type_args_reg);
   __ j(EQUAL, &found, Assembler::kNearJump);
   __ Bind(&next);
   __ addl(EDI, Immediate(StubCode::kInstantiationSizeInWords * kWordSize));
   __ cmpl(EDX, Immediate(Smi::RawValue(StubCode::kNoInstantiator)));
   __ j(NOT_EQUAL, &loop, Assembler::kNearJump);
   __ jmp(&slow_case, Assembler::kNearJump);
   __ Bind(&found);
   __ movl(result_reg, Address(EDI, 2 * kWordSize));  // Cached instantiated ta.
   __ jmp(&type_arguments_instantiated, Assembler::kNearJump);
 
@@ skipping 4557 matching lines @@
   __ Drop(1);
   __ popl(result);
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_IA32