Simplify pending message script handling.

src/arm64/full-codegen-arm64.cc

Index: src/arm64/full-codegen-arm64.cc
diff --git a/src/arm64/full-codegen-arm64.cc b/src/arm64/full-codegen-arm64.cc
index 9731f1b62640f12718022319d4e01384d2383fd4..a8f5ed554293af985db1328de7ee5f3e87b7d21f 100644
--- a/src/arm64/full-codegen-arm64.cc
+++ b/src/arm64/full-codegen-arm64.cc
@@ -5348,12 +5348,6 @@ void FullCodeGenerator::EnterFinallyBlock() {
   __ SmiTag(x11);
 
   __ Push(x10, x11);
-
-  ExternalReference pending_message_script =
-      ExternalReference::address_of_pending_message_script(isolate());
-  __ Mov(x10, pending_message_script);
-  __ Ldr(x10, MemOperand(x10));
-  __ Push(x10);
 }
 
 
@@ -5362,23 +5356,18 @@ void FullCodeGenerator::ExitFinallyBlock() {
   DCHECK(!result_register().is(x10));
 
   // Restore pending message from stack.
-  __ Pop(x10, x11, x12);
-  ExternalReference pending_message_script =
-      ExternalReference::address_of_pending_message_script(isolate());
-  __ Mov(x13, pending_message_script);
-  __ Str(x10, MemOperand(x13));
-
-  __ SmiUntag(x11);
+  __ Pop(x10, x11);
+  __ SmiUntag(x10);
   ExternalReference has_pending_message =
       ExternalReference::address_of_has_pending_message(isolate());
   __ Mov(x13, has_pending_message);
   STATIC_ASSERT(sizeof(bool) == 1);   // NOLINT(runtime/sizeof)
-  __ Strb(x11, MemOperand(x13));
+  __ Strb(x10, MemOperand(x13));
 
   ExternalReference pending_message_obj =
       ExternalReference::address_of_pending_message_obj(isolate());
   __ Mov(x13, pending_message_obj);
-  __ Str(x12, MemOperand(x13));
+  __ Str(x11, MemOperand(x13));
 
   // Restore result register and cooked return address from the stack.
   __ Pop(x10, result_register());