[csa][cleanup] Remove non-Tnodified IntPtrT version of LoadObjectField

There is an int version that will be TNodified in a follow-up CL.

Bug: v8:9708, v8:6949
Change-Id: I3a47cb352396dfe9dea426b6396216c06e0e3254
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2387963
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69695}

src/codegen/code-stub-assembler.cc

@@ -1381,14 +1381,6 @@ Node* CodeStubAssembler::LoadObjectField(TNode<HeapObject> object, int offset,
   return LoadFromObject(type, object, IntPtrConstant(offset - kHeapObjectTag));
 }
 
-Node* CodeStubAssembler::LoadObjectField(TNode<HeapObject> object,
-                                         TNode<IntPtrT> offset,
-                                         MachineType type) {
-  CSA_ASSERT(this, IsStrong(object));
-  return LoadFromObject(type, object,
-                        IntPtrSub(offset, IntPtrConstant(kHeapObjectTag)));
-}
-
 TNode<IntPtrT> CodeStubAssembler::LoadAndUntagObjectField(
     SloppyTNode<HeapObject> object, int offset) {
   if (SmiValuesAre32Bits()) {
@@ -3060,8 +3052,7 @@ TNode<UintPtrT> CodeStubAssembler::LoadBigIntDigit(TNode<BigInt> bigint,
   TNode<IntPtrT> offset =
       IntPtrAdd(IntPtrConstant(BigInt::kDigitsOffset),
                 IntPtrMul(digit_index, IntPtrConstant(kSystemPointerSize)));
-  return UncheckedCast<UintPtrT>(
-      LoadObjectField(bigint, offset, MachineType::UintPtr()));
+  return LoadObjectField<UintPtrT>(bigint, offset);
 }
 
 TNode<ByteArray> CodeStubAssembler::AllocateByteArray(TNode<UintPtrT> length,

src/codegen/code-stub-assembler.h

@@ -1024,14 +1024,16 @@ class V8_EXPORT_PRIVATE CodeStubAssembler
   TNode<Object> LoadObjectField(TNode<HeapObject> object,
                                 TNode<IntPtrT> offset) {
     return UncheckedCast<Object>(
-        LoadObjectField(object, offset, MachineType::AnyTagged()));
+        LoadFromObject(MachineType::AnyTagged(), object,
+                       IntPtrSub(offset, IntPtrConstant(kHeapObjectTag))));
   }
   template <class T, typename std::enable_if<
                          std::is_convertible<TNode<T>, TNode<UntaggedT>>::value,
                          int>::type = 0>
   TNode<T> LoadObjectField(TNode<HeapObject> object, TNode<IntPtrT> offset) {
     return UncheckedCast<T>(
-        LoadObjectField(object, offset, MachineTypeOf<T>::value));
+        LoadFromObject(MachineTypeOf<T>::value, object,
+                       IntPtrSub(offset, IntPtrConstant(kHeapObjectTag))));
   }
   // Load a SMI field and untag it.
   TNode<IntPtrT> LoadAndUntagObjectField(SloppyTNode<HeapObject> object,
@@ -3618,8 +3620,6 @@ class V8_EXPORT_PRIVATE CodeStubAssembler
                                   TVariable<Smi>* var_feedback = nullptr);
 
   Node* LoadObjectField(TNode<HeapObject> object, int offset, MachineType type);
-  Node* LoadObjectField(TNode<HeapObject> object, TNode<IntPtrT> offset,
-                        MachineType type);
 
   // Low-level accessors for Descriptor arrays.
   template <typename T>

test/mjsunit/mjsunit.status

@@ -538,6 +538,7 @@
 ['arch == arm64 and simulator_run', {
   'compiler/osr-big': [PASS, SLOW],
   'regress/regress-454725': [PASS, SLOW],
+  'json': [PASS, SLOW],
   'try': [PASS, SLOW],
   'non-extensible-array-reduce': [PASS, SLOW],
 }],  # 'arch == arm64 and simulator_run'