Reland "Use off-heap data for type feedback in PolymorphicInstanceCallInstr"

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/compiler.h"
@@ skipping 2838 matching lines @@
     Register result = locs->out(0).reg();
     locs->live_registers()->Remove(Location::RegisterLocation(result));
 
     compiler->SaveLiveRegisters(locs);
     if (instruction_->env() != NULL) {
       Environment* env = compiler->SlowPathEnvironmentFor(instruction_);
       compiler->pending_deoptimization_env_ = env;
     }
     __ pushq(locs->in(0).reg());
     __ pushq(locs->in(1).reg());
+    const String& selector =
+        String::Handle(instruction_->call()->ic_data()->target_name());
+    const Array& argument_names =
+        Array::Handle(instruction_->call()->ic_data()->arguments_descriptor());
     compiler->EmitMegamorphicInstanceCall(
-        *instruction_->call()->ic_data(), instruction_->call()->ArgumentCount(),
+        selector, argument_names, instruction_->call()->ArgumentCount(),
         instruction_->call()->deopt_id(), instruction_->call()->token_pos(),
         locs, try_index_,
         /* slow_path_argument_count = */ 2);
     __ MoveRegister(result, RAX);
     compiler->RestoreLiveRegisters(locs);
     __ jmp(exit_label());
     compiler->pending_deoptimization_env_ = NULL;
   }
 
  private:
@@ skipping 143 matching lines @@
     Register result = merged_ ? locs->temp(0).reg() : locs->out(0).reg();
     locs->live_registers()->Remove(Location::RegisterLocation(result));
 
     compiler->SaveLiveRegisters(locs);
     if (instruction_->env() != NULL) {
       Environment* env = compiler->SlowPathEnvironmentFor(instruction_);
       compiler->pending_deoptimization_env_ = env;
     }
     __ pushq(locs->in(0).reg());
     __ pushq(locs->in(1).reg());
+    String& selector =
+        String::Handle(instruction_->call()->ic_data()->target_name());
+    Array& argument_names =
+        Array::Handle(instruction_->call()->ic_data()->arguments_descriptor());
     compiler->EmitMegamorphicInstanceCall(
-        *instruction_->call()->ic_data(), instruction_->call()->ArgumentCount(),
+        selector, argument_names, instruction_->call()->ArgumentCount(),
         instruction_->call()->deopt_id(), instruction_->call()->token_pos(),
         locs, try_index_,
         /* slow_path_argument_count = */ 2);
     __ MoveRegister(result, RAX);
     compiler->RestoreLiveRegisters(locs);
     compiler->pending_deoptimization_env_ = NULL;
     if (merged_) {
       __ CompareObject(result, Bool::True());
       __ j(EQUAL, instruction_->is_negated() ? labels_.false_label
                                              : labels_.true_label);
@@ skipping 3766 matching lines @@
   __ Drop(1);
   __ popq(result);
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64