Mark optimized code that used CHA for optimization so that lazy class 'finalization' does not inval…

runtime/vm/object.h

Index: runtime/vm/object.h
===================================================================
--- runtime/vm/object.h	(revision 32176)
+++ runtime/vm/object.h	(working copy)
@@ -3204,6 +3204,10 @@
     return AliveBit::decode(raw_ptr()->state_bits_);
   }
   void set_is_alive(bool value) const;
+  bool has_used_cha() const {
+    return UsedCHABit::decode(raw_ptr()->state_bits_);
+  }
+  void set_has_used_cha(bool value) const;
 
   uword EntryPoint() const {
     const Instructions& instr = Instructions::Handle(instructions());
@@ -3386,10 +3390,12 @@
   enum {
     kOptimizedBit = 0,
     kAliveBit = 1,
+    kUsedCHABit = 2,
   };
 
   class OptimizedBit : public BitField<bool, kOptimizedBit, 1> {};
   class AliveBit : public BitField<bool, kAliveBit, 1> {};
+  class UsedCHABit : public BitField<bool, kUsedCHABit, 1> {};
 
   // An object finder visitor interface.
   class FindRawCodeVisitor : public FindObjectVisitor {