Add flag polymorphic_with_deopt (default true) and handle case when false: use megamorphic instead …

runtime/vm/intermediate_language_x64.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_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 5423 matching lines @@
   UNIMPLEMENTED();
 }
 
 
 LocationSummary* PolymorphicInstanceCallInstr::MakeLocationSummary(
     Zone* zone, bool opt) const {
   return MakeCallSummary(zone);
 }
 
 
-void PolymorphicInstanceCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
-  ASSERT(ic_data().NumArgsTested() == 1);
-  if (!with_checks()) {
-    ASSERT(ic_data().HasOneTarget());
-    const Function& target = Function::ZoneHandle(ic_data().GetTargetAt(0));
-    compiler->GenerateStaticCall(deopt_id(),
-                                 instance_call()->token_pos(),
-                                 target,
-                                 instance_call()->ArgumentCount(),
-                                 instance_call()->argument_names(),
-                                 locs(),
-                                 ICData::Handle());
-    return;
-  }
-
-  Label* deopt = compiler->AddDeoptStub(
-      deopt_id(), ICData::kDeoptPolymorphicInstanceCallTestFail);
-  Label ok;
-  compiler->EmitTestAndCall(ic_data(),
-                            instance_call()->ArgumentCount(),
-                            instance_call()->argument_names(),
-                            deopt,
-                            &ok,
-                            deopt_id(),
-                            instance_call()->token_pos(),
-                            locs());
-  __ Bind(&ok);
-}
-
-
 LocationSummary* BranchInstr::MakeLocationSummary(Zone* zone,
                                                   bool opt) const {
   comparison()->InitializeLocationSummary(zone, opt);
   // Branches don't produce a result.
   comparison()->locs()->set_out(0, Location::NoLocation());
   return comparison()->locs();
 }
 
 
 void BranchInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
@@ skipping 972 matching lines @@
   __ Drop(1);
   __ popq(result);
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64