Revert of [compiler] Properly guard the speculative optimizations for instanceof.

src/compiler/js-operator.cc

Index: src/compiler/js-operator.cc
diff --git a/src/compiler/js-operator.cc b/src/compiler/js-operator.cc
index f87b34a0af3f543d4265ee7e0549b3e54e2c0b0f..d39f8cdac57c4a0530064297013d30ae17e79516 100644
--- a/src/compiler/js-operator.cc
+++ b/src/compiler/js-operator.cc
@@ -39,14 +39,6 @@
   return base::hash_combine(p.slot(), p.vector().location());
 }
 
-std::ostream& operator<<(std::ostream& os, VectorSlotPair const& p) {
-  if (p.IsValid()) {
-    os << p.index();
-  } else {
-    os << "N/A";
-  }
-  return os;
-}
 
 ConvertReceiverMode ConvertReceiverModeOf(Operator const* op) {
   DCHECK_EQ(IrOpcode::kJSConvertReceiver, op->opcode());
@@ -444,11 +436,6 @@
   return OpParameter<CompareOperationHint>(op);
 }
 
-VectorSlotPair const& VectorSlotPairOf(const Operator* op) {
-  DCHECK_EQ(IrOpcode::kJSInstanceOf, op->opcode());
-  return OpParameter<VectorSlotPair>(op);
-}
-
 #define CACHED_OP_LIST(V)                                   \
   V(ToInteger, Operator::kNoProperties, 1, 1)               \
   V(ToLength, Operator::kNoProperties, 1, 1)                \
@@ -460,6 +447,7 @@
   V(CreateIterResultObject, Operator::kEliminatable, 2, 1)  \
   V(HasProperty, Operator::kNoProperties, 2, 1)             \
   V(TypeOf, Operator::kPure, 1, 1)                          \
+  V(InstanceOf, Operator::kNoProperties, 2, 1)              \
   V(ForInNext, Operator::kNoProperties, 4, 1)               \
   V(ForInPrepare, Operator::kNoProperties, 1, 3)            \
   V(LoadMessage, Operator::kNoThrow, 0, 1)                  \
@@ -777,13 +765,6 @@
       access);                                   // parameter
 }
 
-const Operator* JSOperatorBuilder::InstanceOf(VectorSlotPair const& feedback) {
-  return new (zone()) Operator1<VectorSlotPair>(         // --
-      IrOpcode::kJSInstanceOf, Operator::kNoProperties,  // opcode
-      "JSInstanceOf",                                    // name
-      2, 1, 1, 1, 1, 2,                                  // counts
-      feedback);                                         // parameter
-}
 
 const Operator* JSOperatorBuilder::CreateArguments(CreateArgumentsType type) {
   return new (zone()) Operator1<CreateArgumentsType>(         // --