Fix deoptimization for out-of-line constant pool.

src/a64/frames-a64.cc

Index: src/a64/frames-a64.cc
diff --git a/src/a64/frames-a64.cc b/src/a64/frames-a64.cc
index 56d2e26b7200ec67b9a866cfe0bd493a6ad22e9c..ca5be3a58512bd7d04f69b36f2ec0f8f8303cad0 100644
--- a/src/a64/frames-a64.cc
+++ b/src/a64/frames-a64.cc
@@ -40,10 +40,18 @@ namespace internal {
 
 Register JavaScriptFrame::fp_register() { return v8::internal::fp; }
 Register JavaScriptFrame::context_register() { return cp; }
+Register JavaScriptFrame::constant_pool_pointer_register() {
+  UNREACHABLE();
+  return no_reg;
+}
 
 
 Register StubFailureTrampolineFrame::fp_register() { return v8::internal::fp; }
 Register StubFailureTrampolineFrame::context_register() { return cp; }
+Register StubFailureTrampolineFrame::constant_pool_pointer_register() {
+  UNREACHABLE();
+  return no_reg;
+}
 
 
 Object*& ExitFrame::constant_pool_slot() const {