Turn StoreIC::Megamorphic into a builtin, get rid of the non-monomorphic-cache

src/ic/arm64/ic-arm64.cc

Index: src/ic/arm64/ic-arm64.cc
diff --git a/src/ic/arm64/ic-arm64.cc b/src/ic/arm64/ic-arm64.cc
index 40082bbbecba7c70fce70464d7a5d92abce67ed0..eb52fe8cd1da59b4a816e9d469aeacbb5eef3709 100644
--- a/src/ic/arm64/ic-arm64.cc
+++ b/src/ic/arm64/ic-arm64.cc
@@ -729,14 +729,14 @@ void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
 void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
   Register receiver = StoreDescriptor::ReceiverRegister();
   Register name = StoreDescriptor::NameRegister();
-  DCHECK(!AreAliased(receiver, name, StoreDescriptor::ValueRegister(), x3, x4,
-                     x5, x6));
+  DCHECK(!AreAliased(receiver, name, StoreDescriptor::ValueRegister(), x5, x6,
+                     x7, x8));
 
   // Probe the stub cache.
   Code::Flags flags =
       Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::STORE_IC));
   masm->isolate()->stub_cache()->GenerateProbe(masm, Code::STORE_IC, flags,
-                                               receiver, name, x3, x4, x5, x6);
+                                               receiver, name, x5, x6, x7, x8);
 
   // Cache miss: Jump to runtime.
   GenerateMiss(masm);