PPC/s390: [super property speed] Add an IC for super property loads

Port 3d40ec8d

R=marja@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: I978aa3a15e9c71e1907f49a5b22b6a01a96c5f1e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2399038Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#69750}

src/codegen/ppc/interface-descriptors-ppc.cc

@@ -52,6 +52,11 @@ const Register LoadDescriptor::SlotRegister() { return r3; }
 
 const Register LoadWithVectorDescriptor::VectorRegister() { return r6; }
 
+const Register
+LoadWithReceiverAndVectorDescriptor::LookupStartObjectRegister() {
+  return r7;
+}
+
 const Register StoreDescriptor::ReceiverRegister() { return r4; }
 const Register StoreDescriptor::NameRegister() { return r5; }
 const Register StoreDescriptor::ValueRegister() { return r3; }

src/codegen/s390/interface-descriptors-s390.cc

@@ -52,6 +52,11 @@ const Register LoadDescriptor::SlotRegister() { return r2; }
 
 const Register LoadWithVectorDescriptor::VectorRegister() { return r5; }
 
+const Register
+LoadWithReceiverAndVectorDescriptor::LookupStartObjectRegister() {
+  return r6;
+}
+
 const Register StoreDescriptor::ReceiverRegister() { return r3; }
 const Register StoreDescriptor::NameRegister() { return r4; }
 const Register StoreDescriptor::ValueRegister() { return r2; }