Reland "[turbofan] inline %StringIteratorPrototype%.next in JSBuiltinReducer"

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 8f1ecfc21ef7ce57cb7ce3677e6cd2de6956fe36..a90439131011406432e261fe4ad10779483bfac9 100644
--- a/src/compiler/simplified-operator.h
+++ b/src/compiler/simplified-operator.h
@@ -185,6 +185,8 @@ NumberOperationHint NumberOperationHintOf(const Operator* op)
 
 PretenureFlag PretenureFlagOf(const Operator* op) WARN_UNUSED_RESULT;
 
+UnicodeEncoding UnicodeEncodingOf(const Operator*) WARN_UNUSED_RESULT;
+
 // Interface for building simplified operators, which represent the
 // medium-level operations of V8, including adding numbers, allocating objects,
 // indexing into objects and arrays, etc.
@@ -289,6 +291,7 @@ class SimplifiedOperatorBuilder final : public ZoneObject {
   const Operator* StringLessThanOrEqual();
   const Operator* StringCharCodeAt();
   const Operator* StringFromCharCode();
+  const Operator* StringFromCodePoint(UnicodeEncoding encoding);
 
   const Operator* PlainPrimitiveToNumber();
   const Operator* PlainPrimitiveToWord32();