Implement clearing of CompareICs.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 3ec9428ab255d48da40b5537a8961cc559186906..fbd368fb268939381c69996aac4aa9eed3cd8dc0 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -4291,6 +4291,11 @@ class Code: public HeapObject {
   inline byte compare_state();
   inline void set_compare_state(byte value);
 
+  // [compare_operation]: For kind COMPARE_IC tells what compare operation the
+  // stub was generated for.
+  inline byte compare_operation();
+  inline void set_compare_operation(byte value);
+
   // [to_boolean_foo]: For kind TO_BOOLEAN_IC tells what state the stub is in.
   inline byte to_boolean_state();
   inline void set_to_boolean_state(byte value);
@@ -4474,6 +4479,8 @@ class Code: public HeapObject {
 
   static const int kBinaryOpReturnTypeOffset = kBinaryOpTypeOffset + 1;
 
+  static const int kCompareOperationOffset = kCompareStateOffset + 1;
+
   static const int kAllowOSRAtLoopNestingLevelOffset = kFullCodeFlags + 1;
   static const int kProfilerTicksOffset = kAllowOSRAtLoopNestingLevelOffset + 1;