Optimizing noSuchMethod invocation with no arguments.

runtime/vm/flow_graph_compiler_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"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 1049 matching lines @@
   // the presence of optional parameters.
   // No such checking code is generated if only fixed parameters are declared,
   // unless we are in debug mode or unless we are compiling a closure.
   LocalVariable* saved_args_desc_var =
       parsed_function().GetSavedArgumentsDescriptorVar();
   if (num_copied_params == 0) {
 #ifdef DEBUG
     ASSERT(!parsed_function().function().HasOptionalParameters());
     const bool check_arguments = true;
 #else
-    const bool check_arguments = function.IsClosureFunction();
+    const bool check_arguments =
+        function.IsClosureFunction() || function.IsNoSuchMethodDispatcher();
 #endif
     if (check_arguments) {
       __ Comment("Check argument count");
       // Check that exactly num_fixed arguments are passed in.
       Label correct_num_arguments, wrong_num_arguments;
       __ ldr(R0, FieldAddress(R4, ArgumentsDescriptor::count_offset()));
       __ CompareImmediate(R0, Smi::RawValue(num_fixed_params));
       __ b(&wrong_num_arguments, NE);
       __ ldr(R1, FieldAddress(R4,
                               ArgumentsDescriptor::positional_count_offset()));
       __ cmp(R0, ShifterOperand(R1));
       __ b(&correct_num_arguments, EQ);
       __ Bind(&wrong_num_arguments);
-      if (function.IsClosureFunction()) {
+      if (function.IsClosureFunction() || function.IsNoSuchMethodDispatcher()) {
         if (StackSize() != 0) {
           // We need to unwind the space we reserved for locals and copied
           // parameters. The NoSuchMethodFunction stub does not expect to see
           // that area on the stack.
           __ AddImmediate(SP, StackSize() * kWordSize);
         }
         // The call below has an empty stackmap because we have just
         // dropped the spill slots.
         BitmapBuilder* empty_stack_bitmap = new BitmapBuilder();
 
-        // Invoke noSuchMethod function passing "call" as the function name.
+        // Invoke noSuchMethod function passing the original function name.
+        // For closure functions, use "call" as the original name.
+        const String& name =
+            String::Handle(function.IsClosureFunction()
+                             ? Symbols::Call().raw()
+                             : function.name());
         const int kNumArgsChecked = 1;
         const ICData& ic_data = ICData::ZoneHandle(
-            ICData::New(function, Symbols::Call(),
-                        Isolate::kNoDeoptId, kNumArgsChecked));
+            ICData::New(function, name, Isolate::kNoDeoptId, kNumArgsChecked));
         __ LoadObject(R5, ic_data);
         // FP - 4 : saved PP, object pool pointer of caller.
         // FP + 0 : previous frame pointer.
         // FP + 4 : return address.
         // FP + 8 : PC marker, for easy identification of RawInstruction obj.
         // FP + 12: last argument (arg n-1).
         // SP + 0 : saved PP.
         // SP + 16 + 4*(n-1) : first argument (arg 0).
         // R5 : ic-data.
         // R4 : arguments descriptor array.
@@ skipping 672 matching lines @@
 void ParallelMoveResolver::RestoreFpuScratch(FpuRegister reg) {
   __ vldrd(reg, Address(SP, kDoubleSize, Address::PostIndex));
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM