[turbofan] Add an operator to access the parent frame pointer

src/compiler/verifier.cc

Index: src/compiler/verifier.cc
diff --git a/src/compiler/verifier.cc b/src/compiler/verifier.cc
index 4a5496967a2d346bd963c158130ba925b29063ee..f97d0c53c11cd6085f0d489209c69a225c8dd8cc 100644
--- a/src/compiler/verifier.cc
+++ b/src/compiler/verifier.cc
@@ -945,6 +945,7 @@ void Verifier::Visitor::Check(Node* node) {
     case IrOpcode::kFloat64InsertHighWord32:
     case IrOpcode::kLoadStackPointer:
     case IrOpcode::kLoadFramePointer:
+    case IrOpcode::kLoadParentFramePointer:
     case IrOpcode::kCheckedLoad:
     case IrOpcode::kCheckedStore:
       // TODO(rossberg): Check.