Merge rerenderSES and updateSES again

This reverts commit 1920123 and does a little cleanup.

Author: sophiebits

packages/react-reconciler/src/ReactFiberHooks.js

@@ -1787,7 +1787,7 @@ function mountSyncExternalStore<T>(
   return nextSnapshot;
 }
 
-function rerenderSyncExternalStore<T>(
+function updateSyncExternalStore<T>(
   subscribe: (() => void) => () => void,
   getSnapshot: () => T,
   getServerSnapshot?: () => T,
@@ -1822,83 +1822,7 @@ function rerenderSyncExternalStore<T>(
       }
     }
   }
-  let snapshotChanged = true;
-  if (currentHook !== null) {
-    const prevSnapshot = currentHook.memoizedState;
-    snapshotChanged = !is(prevSnapshot, nextSnapshot);
-    if (snapshotChanged) {
-      hook.memoizedState = nextSnapshot;
-      markWorkInProgressReceivedUpdate();
-    }
-  }
-  const inst = hook.queue;
-
-  updateEffect(subscribeToStore.bind(null, fiber, inst, subscribe), [
-    subscribe,
-  ]);
-
-  // Whenever getSnapshot or subscribe changes, we need to check in the
-  // commit phase if there was an interleaved mutation. In concurrent mode
-  // this can happen all the time, but even in synchronous mode, an earlier
-  // effect may have mutated the store.
-  if (
-    inst.getSnapshot !== getSnapshot ||
-    snapshotChanged ||
-    // Check if the subscribe function changed. We can save some memory by
-    // checking whether we scheduled a subscription effect above.
-    (workInProgressHook !== null &&
-      workInProgressHook.memoizedState.tag & HookHasEffect)
-  ) {
-    fiber.flags |= PassiveEffect;
-    pushEffect(
-      HookHasEffect | HookPassive,
-      updateStoreInstance.bind(null, fiber, inst, nextSnapshot, getSnapshot),
-      createEffectInstance(),
-      null,
-    );
-
-    // Unless we're rendering a blocking lane, schedule a consistency check.
-    // Right before committing, we will walk the tree and check if any of the
-    // stores were mutated.
-    const root: FiberRoot | null = getWorkInProgressRoot();
-
-    if (root === null) {
-      throw new Error(
-        'Expected a work-in-progress root. This is a bug in React. Please file an issue.',
-      );
-    }
-
-    if (!isHydrating && !includesBlockingLane(root, renderLanes)) {
-      pushStoreConsistencyCheck(fiber, getSnapshot, nextSnapshot);
-    }
-  }
-
-  return nextSnapshot;
-}
-
-function updateSyncExternalStore<T>(
-  subscribe: (() => void) => () => void,
-  getSnapshot: () => T,
-  getServerSnapshot?: () => T,
-): T {
-  const fiber = currentlyRenderingFiber;
-  const hook = updateWorkInProgressHook();
-  // Read the current snapshot from the store on every render. This breaks the
-  // normal rules of React, and only works because store updates are
-  // always synchronous.
-  const nextSnapshot = getSnapshot();
-  if (__DEV__) {
-    if (!didWarnUncachedGetSnapshot) {
-      const cachedSnapshot = getSnapshot();
-      if (!is(nextSnapshot, cachedSnapshot)) {
-        console.error(
-          'The result of getSnapshot should be cached to avoid an infinite loop',
-        );
-        didWarnUncachedGetSnapshot = true;
-      }
-    }
-  }
-  const prevSnapshot = ((currentHook: any): Hook).memoizedState;
+  const prevSnapshot = (currentHook || hook).memoizedState;
   const snapshotChanged = !is(prevSnapshot, nextSnapshot);
   if (snapshotChanged) {
     hook.memoizedState = nextSnapshot;
@@ -1941,7 +1865,7 @@ function updateSyncExternalStore<T>(
       );
     }
 
-    if (!includesBlockingLane(root, renderLanes)) {
+    if (!isHydrating && !includesBlockingLane(root, renderLanes)) {
       pushStoreConsistencyCheck(fiber, getSnapshot, nextSnapshot);
     }
   }
@@ -3392,7 +3316,7 @@ const HooksDispatcherOnRerender: Dispatcher = {
   useDeferredValue: rerenderDeferredValue,
   useTransition: rerenderTransition,
   useMutableSource: updateMutableSource,
-  useSyncExternalStore: rerenderSyncExternalStore,
+  useSyncExternalStore: updateSyncExternalStore,
   useId: updateId,
 };
 if (enableCache) {
@@ -4079,11 +4003,7 @@ if (__DEV__) {
     ): T {
       currentHookNameInDev = 'useSyncExternalStore';
       updateHookTypesDev();
-      return rerenderSyncExternalStore(
-        subscribe,
-        getSnapshot,
-        getServerSnapshot,
-      );
+      return updateSyncExternalStore(subscribe, getSnapshot, getServerSnapshot);
     },
     useId(): string {
       currentHookNameInDev = 'useId';
@@ -4664,11 +4584,7 @@ if (__DEV__) {
       currentHookNameInDev = 'useSyncExternalStore';
       warnInvalidHookAccess();
       updateHookTypesDev();
-      return rerenderSyncExternalStore(
-        subscribe,
-        getSnapshot,
-        getServerSnapshot,
-      );
+      return updateSyncExternalStore(subscribe, getSnapshot, getServerSnapshot);
     },
     useId(): string {
       currentHookNameInDev = 'useId';