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

runtime/vm/intermediate_language_arm64.cc

Index: runtime/vm/intermediate_language_arm64.cc
diff --git a/runtime/vm/intermediate_language_arm64.cc b/runtime/vm/intermediate_language_arm64.cc
index a7e6ce27b5c234d1c1283f8ac06b5c24d6712a09..e0c0e81e413e4dc6d4860695e2d15d05fb2174aa 100644
--- a/runtime/vm/intermediate_language_arm64.cc
+++ b/runtime/vm/intermediate_language_arm64.cc
@@ -2888,12 +2888,8 @@ 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);
@@ -3034,12 +3030,8 @@ 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);