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

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/constant_propagator.h"
 #include "vm/cpu.h"
 #include "vm/dart_entry.h"
@@ skipping 10 matching lines @@
 #include "vm/regexp_assembler.h"
 #include "vm/resolver.h"
 #include "vm/scopes.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 
 #include "vm/il_printer.h"
 
 namespace dart {
 
+DEFINE_FLAG(bool, ic_range_profiling, true,
+    "Generate special IC stubs collecting range information "
+    "for binary and unary arithmetic operations");
 DEFINE_FLAG(bool, propagate_ic_data, true,
     "Propagate IC data from unoptimized to optimized IC calls.");
 DEFINE_FLAG(bool, two_args_smi_icd, true,
     "Generate special IC stubs for two args Smi operations");
-DEFINE_FLAG(bool, ic_range_profiling, true,
-    "Generate special IC stubs collecting range information "
-    "for binary and unary arithmetic operations");
 DEFINE_FLAG(bool, unbox_numeric_fields, true,
     "Support unboxed double and float32x4 fields.");
 DECLARE_FLAG(bool, eliminate_type_checks);
 DECLARE_FLAG(bool, trace_optimization);
 DECLARE_FLAG(bool, throw_on_javascript_int_overflow);
 
 Definition::Definition(intptr_t deopt_id)
     : Instruction(deopt_id),
       range_(NULL),
       type_(NULL),
@@ skipping 3003 matching lines @@
   for (intptr_t i = 0; i < ic_data().NumberOfChecks(); ++i) {
     const Function& target = Function::Handle(ic_data().GetTargetAt(i));
     if (!target.IsNoSuchMethodDispatcher() &&
         !target.IsInvokeFieldDispatcher()) {
       return false;
     }
   }
   return true;
 }
 
+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;
+  }
+
+  compiler->EmitPolymorphicInstanceCall(ic_data(),
+                                        instance_call()->ArgumentCount(),
+                                        instance_call()->argument_names(),
+                                        deopt_id(),
+                                        instance_call()->token_pos(),
+                                        locs());
+}
+
 
 LocationSummary* StaticCallInstr::MakeLocationSummary(Zone* zone,
                                                       bool optimizing) const {
   return MakeCallSummary(zone);
 }
 
 
 void StaticCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   const ICData* call_ic_data = NULL;
   if (!FLAG_propagate_ic_data || !compiler->is_optimizing() ||
@@ skipping 542 matching lines @@
     case Token::kTRUNCDIV: return 0;
     case Token::kMOD: return 1;
     default: UNIMPLEMENTED(); return -1;
   }
 }
 
 
 #undef __
 
 }  // namespace dart