Load getter from map descriptor instead of embedding it in handler.

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 f434f2e579580fde70bb3a8b5f7ee60fb2788350..53f084b1d406f6c387201ddfa089e7aec8f89f0a 100644
--- a/src/ic/arm64/handler-compiler-arm64.cc
+++ b/src/ic/arm64/handler-compiler-arm64.cc
@@ -263,11 +263,11 @@ void NamedStoreHandlerCompiler::GenerateStoreViaSetter(
 
 void NamedLoadHandlerCompiler::GenerateLoadViaGetter(
     MacroAssembler* masm, Handle<HeapType> type, Register receiver,
-    Handle<JSFunction> getter) {
+    Register holder, int accessor_index, int expected_arguments) {
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
 
-    if (!getter.is_null()) {
+    if (accessor_index >= 0) {
       // Call the JavaScript getter with the receiver on the stack.
       if (IC::TypeToMap(*type, masm->isolate())->IsJSGlobalObjectMap()) {
         // Swap in the global receiver.
@@ -276,9 +276,14 @@ void NamedLoadHandlerCompiler::GenerateLoadViaGetter(
       }
       __ Push(receiver);
       ParameterCount actual(0);
-      ParameterCount expected(getter);
-      __ InvokeFunction(getter, expected, actual, CALL_FUNCTION,
-                        NullCallWrapper());
+      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));
+      __ InvokeFunction(x1, expected, actual, CALL_FUNCTION, NullCallWrapper());
     } else {
       // If we generate a global code snippet for deoptimization only, remember
       // the place to continue after deoptimization.