LookupCache: Add L1 entry on shrink

If we're shrinking the L1 cache then we just deleted the entry that we
just looked up. Add it back to ensure we don't get yet another lookup
for this entry.

FEXCore/Source/Interface/Core/LookupCache.h

@@ -220,7 +220,7 @@ public:
     }
 
     if (HostPtr && DynamicL1Cache()) {
-      UpdateDynamicL1Stats(Thread);
+      UpdateDynamicL1Stats(Thread, Address, HostPtr);
     }
 
     FEXCORE_PROFILE_INSTANT_INCREMENT(Thread, AccumulatedCacheMissCount, 1);
@@ -228,7 +228,7 @@ public:
     return HostPtr;
   }
 
-  void UpdateDynamicL1Stats(FEXCore::Core::InternalThreadState* Thread) {
+  void UpdateDynamicL1Stats(FEXCore::Core::InternalThreadState* Thread, uint64_t GuestAddress, uint64_t HostCode) {
     // If host pointer was found in L2 or L3, then add it to the counter.
     // Keeping track not L1 misses, but specifically L2/L3 hits.
     ++L2L3CacheHits;
@@ -251,6 +251,9 @@ public:
           // Update the thread's L1 pointer mask to increase how much cache it uses.
           // Since we're in C-code, this is safe to update here.
           Thread->CurrentFrame->State.L1Mask = GetScaledL1PointerMask();
+
+          // If L1 was just shrunk, then we just removed our cached entry. Add it back.
+          AddL1Entry(GuestAddress, HostCode);
         }
       } else if (AveragePerSecond < DynamicL1CacheDecreaseCountHeuristic()) {
         if (CurrentL1Entries > MIN_L1_ENTRIES) {
@@ -383,15 +386,19 @@ public:
   }
 
 private:
+  void AddL1Entry(uint64_t GuestAddress, uint64_t HostCode) {
+    auto& L1Entry = reinterpret_cast<LookupCacheEntry*>(L1Pointer)[GuestAddress & L1PointerMask];
+    L1Entry.GuestCode = GuestAddress;
+    L1Entry.HostCode = HostCode;
+  }
+
   void CacheBlockMapping(uint64_t Address, const GuestToHostMap::BlockEntry& Entry, bool L1Only, const LookupCacheBaseLockToken& lk) {
     for (const auto& CodePage : Entry.CodePages) {
       CachedCodePages[CodePage >> 12].insert(Address);
     }
 
     // Do L1
-    auto& L1Entry = reinterpret_cast<LookupCacheEntry*>(L1Pointer)[Address & L1PointerMask];
-    L1Entry.GuestCode = Address;
-    L1Entry.HostCode = Entry.HostCode;
+    AddL1Entry(Address, Entry.HostCode);
 
     if (!DisableL2Cache() && !L1Only) {
       // Do ful map