Extract LoadAccessor into a masm function.

src/ic/arm64/handler-compiler-arm64.cc

Index: src/ic/arm64/handler-compiler-arm64.cc
diff --git a/src/ic/arm64/handler-compiler-arm64.cc b/src/ic/arm64/handler-compiler-arm64.cc
index 5de315d2e025891595c184ab4bfd456cac8548bc..2444b6918e502c2d9620f105f3bbdc4229006dc5 100644
--- a/src/ic/arm64/handler-compiler-arm64.cc
+++ b/src/ic/arm64/handler-compiler-arm64.cc
@@ -243,12 +243,7 @@ void NamedStoreHandlerCompiler::GenerateStoreViaSetter(
       __ Push(receiver, value());
       ParameterCount actual(1);
       ParameterCount expected(expected_arguments);
-      Register scratch = holder;
-      __ Ldr(scratch, FieldMemOperand(holder, HeapObject::kMapOffset));
-      __ LoadInstanceDescriptors(scratch, scratch);
-      __ Ldr(scratch, FieldMemOperand(scratch, DescriptorArray::GetValueOffset(
-                                                   accessor_index)));
-      __ Ldr(x1, FieldMemOperand(scratch, AccessorPair::kSetterOffset));
+      __ LoadAccessor(x1, holder, accessor_index, ACCESSOR_SETTER);
       __ InvokeFunction(x1, expected, actual, CALL_FUNCTION, NullCallWrapper());
     } else {
       // If we generate a global code snippet for deoptimization only, remember
@@ -282,12 +277,7 @@ void NamedLoadHandlerCompiler::GenerateLoadViaGetter(
       __ Push(receiver);
       ParameterCount actual(0);
       ParameterCount expected(expected_arguments);
-      Register scratch = holder;
-      __ Ldr(scratch, FieldMemOperand(holder, HeapObject::kMapOffset));
-      __ LoadInstanceDescriptors(scratch, scratch);
-      __ Ldr(scratch, FieldMemOperand(scratch, DescriptorArray::GetValueOffset(
-                                                   accessor_index)));
-      __ Ldr(x1, FieldMemOperand(scratch, AccessorPair::kGetterOffset));
+      __ LoadAccessor(x1, holder, accessor_index, ACCESSOR_GETTER);
       __ InvokeFunction(x1, expected, actual, CALL_FUNCTION, NullCallWrapper());
     } else {
       // If we generate a global code snippet for deoptimization only, remember