Stop passing location argument to run time calls, since it is stored in the pc

runtime/vm/code_generator.cc

Index: runtime/vm/code_generator.cc
===================================================================
--- runtime/vm/code_generator.cc	(revision 9536)
+++ runtime/vm/code_generator.cc	(working copy)
@@ -133,33 +133,50 @@
 }
 
 
+// Helper returning the token position of the Dart caller.
+static intptr_t GetCallerLocation() {
+  DartFrameIterator iterator;
+  StackFrame* caller_frame = iterator.NextFrame();
+  ASSERT(caller_frame != NULL);
+  const Code& code = Code::Handle(caller_frame->LookupDartCode());
+  const PcDescriptors& descriptors =
+      PcDescriptors::Handle(code.pc_descriptors());
+  ASSERT(!descriptors.IsNull());
+  for (int i = 0; i < descriptors.Length(); i++) {
+    if (static_cast<uword>(descriptors.PC(i)) == caller_frame->pc()) {
+      return descriptors.TokenIndex(i);
+    }
+  }
+  return -1;
+}
+
+
 // Allocate a new object of a generic type and check that the instantiated type
 // arguments are within the declared bounds or throw a dynamic type error.
-// Arg0: index of the token of the instance creation (source location).
-// Arg1: class of the object that needs to be allocated.
-// Arg2: type arguments of the object that needs to be allocated.
-// Arg3: type arguments of the instantiator or kNoInstantiator.
+// Arg0: class of the object that needs to be allocated.
+// Arg1: type arguments of the object that needs to be allocated.
+// Arg2: type arguments of the instantiator or kNoInstantiator.
 // Return value: newly allocated object.
-DEFINE_RUNTIME_ENTRY(AllocateObjectWithBoundsCheck, 4) {
+DEFINE_RUNTIME_ENTRY(AllocateObjectWithBoundsCheck, 3) {
   ASSERT(FLAG_enable_type_checks);
   ASSERT(arguments.Count() ==
          kAllocateObjectWithBoundsCheckRuntimeEntry.argument_count());
-  const Class& cls = Class::CheckedHandle(arguments.At(1));
+  const Class& cls = Class::CheckedHandle(arguments.At(0));
   const Instance& instance = Instance::Handle(Instance::New(cls));
   arguments.SetReturn(instance);
   ASSERT(cls.HasTypeArguments());
   AbstractTypeArguments& type_arguments =
-      AbstractTypeArguments::CheckedHandle(arguments.At(2));
+      AbstractTypeArguments::CheckedHandle(arguments.At(1));
   ASSERT(type_arguments.IsNull() ||
          (type_arguments.Length() == cls.NumTypeArguments()));
   AbstractTypeArguments& bounds_instantiator = AbstractTypeArguments::Handle();
-  if (Object::Handle(arguments.At(3)).IsSmi()) {
-    ASSERT(Smi::CheckedHandle(arguments.At(3)).Value() ==
+  if (Object::Handle(arguments.At(2)).IsSmi()) {
+    ASSERT(Smi::CheckedHandle(arguments.At(2)).Value() ==
            StubCode::kNoInstantiator);
   } else {
     ASSERT(!type_arguments.IsInstantiated());
     const AbstractTypeArguments& instantiator =
-        AbstractTypeArguments::CheckedHandle(arguments.At(3));
+        AbstractTypeArguments::CheckedHandle(arguments.At(2));
     ASSERT(instantiator.IsNull() || instantiator.IsInstantiated());
     if (instantiator.IsNull()) {
       type_arguments =
@@ -192,7 +209,7 @@
                                          &malformed_error)) {
       ASSERT(!malformed_error.IsNull());
       // Throw a dynamic type error.
-      intptr_t location = Smi::CheckedHandle(arguments.At(0)).Value();
+      const intptr_t location = GetCallerLocation();
       String& malformed_error_message =  String::Handle(
           String::New(malformed_error.ToErrorCString()));
       const String& no_name = String::Handle(String::NewSymbol(""));
@@ -521,26 +538,23 @@
 
 // Check that the given instance is an instance of the given type.
 // Tested instance may not be null, because the null test is inlined.
-// Arg0: index of the token of the instanceof test (source location).
-// Arg1: node id of the instanceof node.
-// Arg2: instance being checked.
-// Arg3: type.
-// Arg4: instantiator (or null).
-// Arg5: type arguments of the instantiator of the type.
-// Arg6: SubtypeTestCache.
+// Arg0: node id of the instanceof node.
+// Arg1: instance being checked.
+// Arg2: type.
+// Arg3: instantiator (or null).
+// Arg4: type arguments of the instantiator of the type.
+// Arg5: SubtypeTestCache.
 // Return value: true or false, or may throw a type error in checked mode.
-DEFINE_RUNTIME_ENTRY(Instanceof, 7) {
+DEFINE_RUNTIME_ENTRY(Instanceof, 6) {
   ASSERT(arguments.Count() == kInstanceofRuntimeEntry.argument_count());
-  // TODO(regis): Get the token index from the PcDesc (via DartFrame).
-  intptr_t location = Smi::CheckedHandle(arguments.At(0)).Value();
-  intptr_t node_id = Smi::CheckedHandle(arguments.At(1)).Value();
-  const Instance& instance = Instance::CheckedHandle(arguments.At(2));
-  const AbstractType& type = AbstractType::CheckedHandle(arguments.At(3));
-  const Instance& instantiator = Instance::CheckedHandle(arguments.At(4));
+  intptr_t node_id = Smi::CheckedHandle(arguments.At(0)).Value();
+  const Instance& instance = Instance::CheckedHandle(arguments.At(1));
+  const AbstractType& type = AbstractType::CheckedHandle(arguments.At(2));
+  const Instance& instantiator = Instance::CheckedHandle(arguments.At(3));
   const AbstractTypeArguments& instantiator_type_arguments =
-      AbstractTypeArguments::CheckedHandle(arguments.At(5));
+      AbstractTypeArguments::CheckedHandle(arguments.At(4));
   const SubtypeTestCache& cache =
-      SubtypeTestCache::CheckedHandle(arguments.At(6));
+      SubtypeTestCache::CheckedHandle(arguments.At(5));
   ASSERT(type.IsFinalized());
   Error& malformed_error = Error::Handle();
   const Bool& result = Bool::Handle(
@@ -554,6 +568,7 @@
   }
   if (!result.value() && !malformed_error.IsNull()) {
     // Throw a dynamic type error only if the instanceof test fails.
+    const intptr_t location = GetCallerLocation();
     String& malformed_error_message =  String::Handle(
         String::New(malformed_error.ToErrorCString()));
     const String& no_name = String::Handle(String::NewSymbol(""));
@@ -580,28 +595,25 @@
 
 // Check that the type of the given instance is a subtype of the given type and
 // can therefore be assigned.
-// Arg0: index of the token of the assignment (source location).
-// Arg1: node-id of the assignment.
-// Arg2: instance being assigned.
-// Arg3: type being assigned to.
-// Arg4: instantiator (or null).
-// Arg5: type arguments of the instantiator of the type being assigned to.
-// Arg6: name of variable being assigned to.
-// Arg7: SubtypeTestCache.
+// Arg0: node-id of the assignment.
+// Arg1: instance being assigned.
+// Arg2: type being assigned to.
+// Arg3: instantiator (or null).
+// Arg4: type arguments of the instantiator of the type being assigned to.
+// Arg5: name of variable being assigned to.
+// Arg6: SubtypeTestCache.
 // Return value: instance if a subtype, otherwise throw a TypeError.
-DEFINE_RUNTIME_ENTRY(TypeCheck, 8) {
+DEFINE_RUNTIME_ENTRY(TypeCheck, 7) {
   ASSERT(arguments.Count() == kTypeCheckRuntimeEntry.argument_count());
-  // TODO(regis): Get the token index from the PcDesc (via DartFrame).
-  intptr_t location = Smi::CheckedHandle(arguments.At(0)).Value();
-  intptr_t node_id = Smi::CheckedHandle(arguments.At(1)).Value();
-  const Instance& src_instance = Instance::CheckedHandle(arguments.At(2));
-  const AbstractType& dst_type = AbstractType::CheckedHandle(arguments.At(3));
-  const Instance& dst_instantiator = Instance::CheckedHandle(arguments.At(4));
+  intptr_t node_id = Smi::CheckedHandle(arguments.At(0)).Value();
+  const Instance& src_instance = Instance::CheckedHandle(arguments.At(1));
+  const AbstractType& dst_type = AbstractType::CheckedHandle(arguments.At(2));
+  const Instance& dst_instantiator = Instance::CheckedHandle(arguments.At(3));
   const AbstractTypeArguments& instantiator_type_arguments =
-      AbstractTypeArguments::CheckedHandle(arguments.At(5));
-  const String& dst_name = String::CheckedHandle(arguments.At(6));
+      AbstractTypeArguments::CheckedHandle(arguments.At(4));
+  const String& dst_name = String::CheckedHandle(arguments.At(5));
   const SubtypeTestCache& cache =
-      SubtypeTestCache::CheckedHandle(arguments.At(7));
+      SubtypeTestCache::CheckedHandle(arguments.At(6));
   ASSERT(!dst_type.IsDynamicType());  // No need to check assignment.
   ASSERT(!dst_type.IsMalformed());  // Already checked in code generator.
   ASSERT(!src_instance.IsNull());  // Already checked in inlined code.
@@ -616,6 +628,8 @@
         Bool::Handle(is_instance_of ? Bool::True() : Bool::False()));
   }
   if (!is_instance_of) {
+    // Throw a dynamic type error.
+    const intptr_t location = GetCallerLocation();
     String& src_type_name = String::Handle(GetSimpleTypeName(src_instance));
     String& dst_type_name = String::Handle();
     if (!dst_type.IsInstantiated()) {
@@ -643,15 +657,13 @@
 
 
 // Report that the type of the given object is not bool in conditional context.
-// Arg0: index of the token of the assignment (source location).
-// Arg1: bad object.
+// Arg0: bad object.
 // Return value: none, throws a TypeError.
-DEFINE_RUNTIME_ENTRY(ConditionTypeError, 2) {
+DEFINE_RUNTIME_ENTRY(ConditionTypeError, 1) {
   ASSERT(arguments.Count() ==
       kConditionTypeErrorRuntimeEntry.argument_count());
-  // TODO(regis): Get the token index from the PcDesc (via DartFrame).
-  intptr_t location = Smi::CheckedHandle(arguments.At(0)).Value();
-  const Instance& src_instance = Instance::CheckedHandle(arguments.At(1));
+  const intptr_t location = GetCallerLocation();
+  const Instance& src_instance = Instance::CheckedHandle(arguments.At(0));
   ASSERT(src_instance.IsNull() || !src_instance.IsBool());
   const Type& bool_interface = Type::Handle(Type::BoolInterface());
   const String& src_type_name = String::Handle(GetSimpleTypeName(src_instance));
@@ -665,19 +677,17 @@
 
 
 // Report that the type of the type check is malformed.
-// Arg0: index of the token of the failed type check.
-// Arg1: src value.
-// Arg2: name of instance being assigned to.
-// Arg3: malformed type error message.
+// Arg0: src value.
+// Arg1: name of instance being assigned to.
+// Arg2: malformed type error message.
 // Return value: none, throws an exception.
-DEFINE_RUNTIME_ENTRY(MalformedTypeError, 4) {
+DEFINE_RUNTIME_ENTRY(MalformedTypeError, 3) {
   ASSERT(arguments.Count() ==
       kMalformedTypeErrorRuntimeEntry.argument_count());
-  // TODO(regis): Get the token index from the PcDesc (via DartFrame).
-  intptr_t location = Smi::CheckedHandle(arguments.At(0)).Value();
-  const Instance& src_value = Instance::CheckedHandle(arguments.At(1));
-  const String& dst_name = String::CheckedHandle(arguments.At(2));
-  const String& malformed_error = String::CheckedHandle(arguments.At(3));
+  const intptr_t location = GetCallerLocation();
+  const Instance& src_value = Instance::CheckedHandle(arguments.At(0));
+  const String& dst_name = String::CheckedHandle(arguments.At(1));
+  const String& malformed_error = String::CheckedHandle(arguments.At(2));
   const String& dst_type_name = String::Handle(String::NewSymbol("malformed"));
   const String& src_type_name = String::Handle(GetSimpleTypeName(src_value));
   Exceptions::CreateAndThrowTypeError(location, src_type_name,