Store arguments descriptor in ICData. Remove loading of arguments descriptor at unoptimized call si…

runtime/vm/flow_graph_optimizer.cc

Index: runtime/vm/flow_graph_optimizer.cc
===================================================================
--- runtime/vm/flow_graph_optimizer.cc	(revision 24193)
+++ runtime/vm/flow_graph_optimizer.cc	(working copy)
@@ -120,6 +120,7 @@
     ICData& ic_data = ICData::ZoneHandle(ICData::New(
         flow_graph_->parsed_function().function(),
         call->function_name(),
+        Array::Handle(),  // Dummy argument descriptor.
         call->deopt_id(),
         class_ids.length()));
     ic_data.AddReceiverCheck(class_ids[0], function);
@@ -141,6 +142,7 @@
   const ICData& new_ic_data = ICData::ZoneHandle(ICData::New(
       Function::Handle(ic_data.function()),
       String::Handle(ic_data.target_name()),
+      Array::Handle(),  // Dummy argument descriptor.
       ic_data.deopt_id(),
       ic_data.num_args_tested()));
 
@@ -2110,6 +2112,7 @@
       // Check that value is always smi.
       value_check = ICData::New(Function::Handle(),
                                 String::Handle(),
+                                Array::Handle(),
                                 Isolate::kNoDeoptId,
                                 1);
       value_check.AddReceiverCheck(kSmiCid, Function::Handle());
@@ -2123,6 +2126,7 @@
       if (call->ic_data()->deopt_reason() == kDeoptUnknown) {
         value_check = ICData::New(Function::Handle(),
                                   String::Handle(),
+                                  Array::Handle(),  // Dummy args. descriptor.
                                   Isolate::kNoDeoptId,
                                   1);
         value_check.AddReceiverCheck(kSmiCid, Function::Handle());
@@ -2133,6 +2137,7 @@
       // Check that value is always double.
       value_check = ICData::New(Function::Handle(),
                                 String::Handle(),
+                                Array::Handle(),  // Dummy arguments descriptor.
                                 Isolate::kNoDeoptId,
                                 1);
       value_check.AddReceiverCheck(kDoubleCid, Function::Handle());
@@ -2142,6 +2147,7 @@
       // Check that value is always Float32x4.
       value_check = ICData::New(Function::Handle(),
                                 String::Handle(),
+                                Array::Handle(),  // Dummy arguments descriptor.
                                 Isolate::kNoDeoptId,
                                 1);
       value_check.AddReceiverCheck(kFloat32x4Cid, Function::Handle());