[turbofan] Type feedback for numeric comparisons.

src/compiler/simplified-operator.h

Index: src/compiler/simplified-operator.h
diff --git a/src/compiler/simplified-operator.h b/src/compiler/simplified-operator.h
index 296f8233478437d309126847166c0d9451ca7a59..dd174f3e5b6ce9f965e8183b3c1d043ccfc4cf50 100644
--- a/src/compiler/simplified-operator.h
+++ b/src/compiler/simplified-operator.h
@@ -107,6 +107,8 @@ Type* TypeOf(const Operator* op) WARN_UNUSED_RESULT;
 
 BinaryOperationHints::Hint BinaryOperationHintOf(const Operator* op);
 
+CompareOperationHints::Hint CompareOperationHintOf(const Operator* op);
+
 // Interface for building simplified operators, which represent the
 // medium-level operations of V8, including adding numbers, allocating objects,
 // indexing into objects and arrays, etc.
@@ -164,6 +166,11 @@ class SimplifiedOperatorBuilder final : public ZoneObject {
   const Operator* SpeculativeNumberAdd(BinaryOperationHints::Hint hint);
   const Operator* SpeculativeNumberSubtract(BinaryOperationHints::Hint hint);
 
+  const Operator* SpeculativeNumberLessThan(CompareOperationHints::Hint hint);
+  const Operator* SpeculativeNumberLessThanOrEqual(
+      CompareOperationHints::Hint hint);
+  const Operator* SpeculativeNumberEqual(CompareOperationHints::Hint hint);
+
   const Operator* ReferenceEqual(Type* type);
 
   const Operator* StringEqual();