Use off-heap data for type feedback in PolymorphicInstanceCallInstr

runtime/vm/intermediate_language_x64.cc

Index: runtime/vm/intermediate_language_x64.cc
diff --git a/runtime/vm/intermediate_language_x64.cc b/runtime/vm/intermediate_language_x64.cc
index 55f64e92449612c9454afe60c10f167fd61098dc..a5ea9429c95a4a8e540d6a56190420b42e66b0bb 100644
--- a/runtime/vm/intermediate_language_x64.cc
+++ b/runtime/vm/intermediate_language_x64.cc
@@ -2839,8 +2839,12 @@ class CheckedSmiSlowPath : public SlowPathCode {
     }
     __ 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);
@@ -3004,8 +3008,12 @@ class CheckedSmiComparisonSlowPath : public SlowPathCode {
     }
     __ 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);