[Interpreter] Remove register file register and replace with LoadParentFramePointer.

test/unittests/compiler/node-test-utils.cc

Index: test/unittests/compiler/node-test-utils.cc
diff --git a/test/unittests/compiler/node-test-utils.cc b/test/unittests/compiler/node-test-utils.cc
index 5177344319a2a2245d74abbddd7e3c1733b15f64..f1c42832e6dadf1970a4dce280d84db1b3dffc40 100644
--- a/test/unittests/compiler/node-test-utils.cc
+++ b/test/unittests/compiler/node-test-utils.cc
@@ -2204,6 +2204,10 @@ Matcher<Node*> IsLoadFramePointer() {
   return MakeMatcher(new NodeMatcher(IrOpcode::kLoadFramePointer));
 }
 
+Matcher<Node*> IsLoadParentFramePointer() {
+  return MakeMatcher(new NodeMatcher(IrOpcode::kLoadParentFramePointer));
+}
+
 #define IS_QUADOP_MATCHER(Name)                                               \
   Matcher<Node*> Is##Name(                                                    \
       const Matcher<Node*>& a_matcher, const Matcher<Node*>& b_matcher,       \