Revert "[array] Change QuickSort to TimSort for Array.p.sort"

This reverts commit e3229485.

Reason for revert: just landed to gather perf feedback.

Original change's description:
> [array] Change QuickSort to TimSort for Array.p.sort
> 
> R=​jgruber@chromium.org
> 
> Bug: v8:7382
> Change-Id: I95d2187d22c3bea4323789042b3426d65fde4999
> Reviewed-on: https://chromium-review.googlesource.com/1111959
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Commit-Queue: Simon Zünd <szuend@google.com>
> Cr-Commit-Position: refs/heads/master@{#53970}

TBR=jgruber@chromium.org,szuend@google.com

Change-Id: I1e150e856a32039eb241a745bd7e6180f2132430
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7382
Reviewed-on: https://chromium-review.googlesource.com/1112099Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53974}

src/builtins/base.tq

@@ -238,9 +238,7 @@ extern operator '!=' macro WordNotEqual(Object, Object): bool;
 
 extern operator '+' macro SmiAdd(Smi, Smi): Smi;
 extern operator '-' macro SmiSub(Smi, Smi): Smi;
-extern operator '*' macro SmiMul(Smi, Smi): Smi;
 extern operator '&' macro SmiAnd(Smi, Smi): Smi;
-extern operator '|' macro SmiOr(Smi, Smi): Smi;
 extern operator '>>>' macro SmiShr(Smi, constexpr int31): Smi;
 
 extern operator '+' macro IntPtrAdd(intptr, intptr): intptr;
@@ -666,7 +664,6 @@ extern macro IsJSArray(HeapObject): bool;
 extern macro TaggedIsCallable(Object): bool;
 extern macro IsDetachedBuffer(JSArrayBuffer): bool;
 extern macro IsHeapNumber(HeapObject): bool;
-extern macro IsFixedArray(HeapObject): bool;
 extern macro IsExtensibleMap(Map): bool;
 extern macro IsCustomElementsReceiverInstanceType(int32): bool;
 

src/builtins/builtins-array-gen.cc

@@ -381,26 +381,6 @@ Node* ArrayBuiltinsAssembler::FindProcessor(Node* k_value, Node* k) {
 
   void ArrayBuiltinsAssembler::NullPostLoopAction() {}
 
-  void ArrayBuiltinsAssembler::FillFixedArrayWithZero(TNode<FixedArray> array,
-                                                      TNode<Smi> smi_length) {
-    TNode<IntPtrT> length = SmiToIntPtr(smi_length);
-    TNode<WordT> byte_length = WordShl(length, kPointerSizeLog2);
-    CSA_ASSERT(this, UintPtrLessThan(length, byte_length));
-
-    static const int32_t fa_base_data_offset =
-        FixedArray::kHeaderSize - kHeapObjectTag;
-    TNode<IntPtrT> backing_store = IntPtrAdd(
-        BitcastTaggedToWord(array), IntPtrConstant(fa_base_data_offset));
-
-    // Call out to memset to perform initialization.
-    TNode<ExternalReference> memset =
-        ExternalConstant(ExternalReference::libc_memset_function());
-    STATIC_ASSERT(kSizetSize == kIntptrSize);
-    CallCFunction3(MachineType::Pointer(), MachineType::Pointer(),
-                   MachineType::IntPtr(), MachineType::UintPtr(), memset,
-                   backing_store, IntPtrConstant(0), byte_length);
-  }
-
   void ArrayBuiltinsAssembler::ReturnFromBuiltin(Node* value) {
     if (argc_ == nullptr) {
       Return(value);

src/builtins/builtins-array-gen.h

@@ -77,9 +77,6 @@ class ArrayBuiltinsAssembler : public BaseBuiltinsFromDSLAssembler {
     return StoreFixedArrayElement(array, index, value);
   }
 
-  // Uses memset to effectively initialize the given FixedArray with Smi zeroes.
-  void FillFixedArrayWithZero(TNode<FixedArray> array, TNode<Smi> smi_length);
-
  protected:
   TNode<Context> context() { return context_; }
   TNode<Object> receiver() { return receiver_; }