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

runtime/vm/intermediate_language_arm.cc

Index: runtime/vm/intermediate_language_arm.cc
diff --git a/runtime/vm/intermediate_language_arm.cc b/runtime/vm/intermediate_language_arm.cc
index 0fd2ada46bb0c2aecfe4699202b52ec88565efe6..238cfc11bb46cc3c1dc9be5f8770b6886802cbf1 100644
--- a/runtime/vm/intermediate_language_arm.cc
+++ b/runtime/vm/intermediate_language_arm.cc
@@ -3158,12 +3158,8 @@ class CheckedSmiSlowPath : public SlowPathCode {
     }
     __ Push(locs->in(0).reg());
     __ Push(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(
-        selector, argument_names, instruction_->call()->ArgumentCount(),
+        *instruction_->call()->ic_data(), instruction_->call()->ArgumentCount(),
         instruction_->call()->deopt_id(), instruction_->call()->token_pos(),
         locs, try_index_,
         /* slow_path_argument_count = */ 2);
@@ -3301,12 +3297,8 @@ class CheckedSmiComparisonSlowPath : public SlowPathCode {
     }
     __ Push(locs->in(0).reg());
     __ Push(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(
-        selector, argument_names, instruction_->call()->ArgumentCount(),
+        *instruction_->call()->ic_data(), instruction_->call()->ArgumentCount(),
         instruction_->call()->deopt_id(), instruction_->call()->token_pos(),
         locs, try_index_,
         /* slow_path_argument_count = */ 2);