[runtime] Port simple String.prototype.indexOf cases to TF Builtin

src/code-stub-assembler.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 #include "src/code-stub-assembler.h"
 #include "src/code-factory.h"
 #include "src/frames-inl.h"
 #include "src/frames.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 4362 matching lines @@
   Node* capacity = IntPtrRoundUpToPowerOfTwo32(
       WordShl(at_least_space_for, IntPtrConstant(1)));
   return IntPtrMax(capacity, IntPtrConstant(HashTableBase::kMinCapacity));
 }
 
 Node* CodeStubAssembler::IntPtrMax(Node* left, Node* right) {
   return SelectConstant(IntPtrGreaterThanOrEqual(left, right), left, right,
                         MachineType::PointerRepresentation());
 }
 
+Node* CodeStubAssembler::IntPtrMin(Node* left, Node* right) {
+  return SelectConstant(IntPtrLessThanOrEqual(left, right), left, right,
+                        MachineType::PointerRepresentation());
+}
+
 template <class Dictionary>
 Node* CodeStubAssembler::GetNumberOfElements(Node* dictionary) {
   return LoadFixedArrayElement(dictionary, Dictionary::kNumberOfElementsIndex);
 }
 
 template <class Dictionary>
 void CodeStubAssembler::SetNumberOfElements(Node* dictionary,
                                             Node* num_elements_smi) {
   StoreFixedArrayElement(dictionary, Dictionary::kNumberOfElementsIndex,
                          num_elements_smi, SKIP_WRITE_BARRIER);
@@ skipping 3896 matching lines @@
                        Heap::kUndefinedValueRootIndex);
   StoreObjectFieldRoot(result, PromiseReactionJobInfo::kDebugNameOffset,
                        Heap::kUndefinedValueRootIndex);
   StoreObjectFieldNoWriteBarrier(result, PromiseReactionJobInfo::kContextOffset,
                                  context);
   return result;
 }
 
 }  // namespace internal
 }  // namespace v8