Clean up enableSiblingPrerendering flag (#32319)

DiffTrain build for [4ca97e4](4ca97e4)

Author: jackpope

compiled-rn/VERSION_NATIVE_FB

@@ -1 +1 @@
-19.2.0-native-fb-9b79292a-20250508
+19.2.0-native-fb-4ca97e48-20250508

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/react-dom/cjs/ReactDOM-dev.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<52ff017ed5093ae8c5981421a6e71f4b>>
+ * @generated SignedSource<<6be1231f0a2cf5263e09a1bc1ecddf64>>
  */
 
 "use strict";
@@ -404,5 +404,5 @@ __DEV__ &&
     exports.useFormStatus = function () {
       return resolveDispatcher().useHostTransitionStatus();
     };
-    exports.version = "19.2.0-native-fb-9b79292a-20250508";
+    exports.version = "19.2.0-native-fb-4ca97e48-20250508";
   })();

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/react-dom/cjs/ReactDOM-prod.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<77db10b684b9429e6f14fc2fe20c105a>>
+ * @generated SignedSource<<90bf4ce482387e50d0dc3389b4019c01>>
  */
 
 "use strict";
@@ -203,4 +203,4 @@ exports.useFormState = function (action, initialState, permalink) {
 exports.useFormStatus = function () {
   return ReactSharedInternals.H.useHostTransitionStatus();
 };
-exports.version = "19.2.0-native-fb-9b79292a-20250508";
+exports.version = "19.2.0-native-fb-4ca97e48-20250508";

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/react-dom/cjs/ReactDOM-profiling.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<77db10b684b9429e6f14fc2fe20c105a>>
+ * @generated SignedSource<<90bf4ce482387e50d0dc3389b4019c01>>
  */
 
 "use strict";
@@ -203,4 +203,4 @@ exports.useFormState = function (action, initialState, permalink) {
 exports.useFormStatus = function () {
   return ReactSharedInternals.H.useHostTransitionStatus();
 };
-exports.version = "19.2.0-native-fb-9b79292a-20250508";
+exports.version = "19.2.0-native-fb-4ca97e48-20250508";

compiled-rn/facebook-fbsource/xplat/js/RKJSModules/vendor/react/react-dom/cjs/ReactDOMClient-dev.js

@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<fdc173e3e84cf7e0c28555b54d7382d6>>
+ * @generated SignedSource<<43b19660149a48f857a91e01876b46dd>>
  */
 
 /*
@@ -1182,8 +1182,7 @@ __DEV__ &&
             : ((pingedLanes &= nonIdlePendingLanes),
               0 !== pingedLanes
                 ? (nextLanes = getHighestPriorityLanes(pingedLanes))
-                : enableSiblingPrerendering &&
-                  !rootHasPendingCommit &&
+                : rootHasPendingCommit ||
                   ((rootHasPendingCommit = nonIdlePendingLanes & ~root),
                   0 !== rootHasPendingCommit &&
                     (nextLanes =
@@ -1193,8 +1192,7 @@ __DEV__ &&
             ? (nextLanes = getHighestPriorityLanes(nonIdlePendingLanes))
             : 0 !== pingedLanes
               ? (nextLanes = getHighestPriorityLanes(pingedLanes))
-              : enableSiblingPrerendering &&
-                !rootHasPendingCommit &&
+              : rootHasPendingCommit ||
                 ((rootHasPendingCommit = pendingLanes & ~root),
                 0 !== rootHasPendingCommit &&
                   (nextLanes = getHighestPriorityLanes(rootHasPendingCommit))));
@@ -1329,8 +1327,7 @@ __DEV__ &&
         remainingLanes &= ~lane;
       }
       0 !== spawnedLane && markSpawnedDeferredLane(root, spawnedLane, 0);
-      enableSiblingPrerendering &&
-        0 !== suspendedRetryLanes &&
+      0 !== suspendedRetryLanes &&
         0 === updatedLanes &&
         (root.suspendedLanes |=
           suspendedRetryLanes & ~(previouslyPendingLanes & ~finishedLanes));
@@ -11809,8 +11806,7 @@ __DEV__ &&
         ((retryQueue =
           22 !== workInProgress.tag ? claimNextRetryLane() : 536870912),
         (workInProgress.lanes |= retryQueue),
-        enableSiblingPrerendering &&
-          (workInProgressSuspendedRetryLanes |= retryQueue));
+        (workInProgressSuspendedRetryLanes |= retryQueue));
     }
     function cutOffTailIfNeeded(renderState, hasRenderedATailFallback) {
       if (!isHydrating)
@@ -15709,15 +15705,14 @@ __DEV__ &&
           (!forceSync &&
             0 === (lanes & 124) &&
             0 === (lanes & root.expiredLanes)) ||
-          (enableSiblingPrerendering && checkIfRootIsPrerendering(root, lanes)),
+          checkIfRootIsPrerendering(root, lanes),
         exitStatus = shouldTimeSlice
           ? renderRootConcurrent(root, lanes)
           : renderRootSync(root, lanes, !0),
         renderWasConcurrent = shouldTimeSlice;
       do {
         if (exitStatus === RootInProgress) {
-          enableSiblingPrerendering &&
-            workInProgressRootIsPrerendering &&
+          workInProgressRootIsPrerendering &&
             !shouldTimeSlice &&
             markRootSuspended(root, lanes, 0, !1);
           break;
@@ -16003,9 +15998,7 @@ __DEV__ &&
       suspendedLanes &= ~workInProgressRootInterleavedUpdatedLanes;
       root.suspendedLanes |= suspendedLanes;
       root.pingedLanes &= ~suspendedLanes;
-      enableSiblingPrerendering &&
-        didAttemptEntireTree &&
-        (root.warmLanes |= suspendedLanes);
+      didAttemptEntireTree && (root.warmLanes |= suspendedLanes);
       didAttemptEntireTree = root.expirationTimes;
       for (var lanes = suspendedLanes; 0 < lanes; ) {
         var index = 31 - clz32(lanes),
@@ -16095,15 +16088,7 @@ __DEV__ &&
       thrownValue === SuspenseException ||
       thrownValue === SuspenseActionException
         ? ((thrownValue = getSuspendedThenable()),
-          (workInProgressSuspendedReason =
-            !enableSiblingPrerendering &&
-            shouldRemainOnPreviousScreen() &&
-            0 === (workInProgressRootSkippedLanes & 134217727) &&
-            0 === (workInProgressRootInterleavedUpdatedLanes & 134217727)
-              ? thrownValue === SuspenseActionException
-                ? SuspendedOnAction
-                : SuspendedOnData
-              : SuspendedOnImmediate))
+          (workInProgressSuspendedReason = SuspendedOnImmediate))
         : thrownValue === SuspenseyCommitException
           ? ((thrownValue = getSuspendedThenable()),
             (workInProgressSuspendedReason = SuspendedOnInstance))
@@ -16242,7 +16227,6 @@ __DEV__ &&
                 workInProgressThrownValue = null;
                 throwAndUnwindWorkLoop(root, unitOfWork, thrownValue, reason);
                 if (
-                  enableSiblingPrerendering &&
                   shouldYieldForPrerendering &&
                   workInProgressRootIsPrerendering
                 ) {
@@ -16566,27 +16550,23 @@ __DEV__ &&
         return;
       }
       if (unitOfWork.flags & 32768) {
-        if (enableSiblingPrerendering)
-          if (isHydrating || suspendedReason === SuspendedOnError) root = !0;
-          else if (
-            workInProgressRootIsPrerendering ||
-            0 !== (workInProgressRootRenderLanes & 536870912)
-          )
-            root = !1;
-          else {
-            if (
-              ((workInProgressRootDidSkipSuspendedSiblings = root = !0),
-              suspendedReason === SuspendedOnData ||
-                suspendedReason === SuspendedOnAction ||
-                suspendedReason === SuspendedOnImmediate ||
-                suspendedReason === SuspendedOnDeprecatedThrowPromise)
-            )
-              (suspendedReason = suspenseHandlerStackCursor.current),
-                null !== suspendedReason &&
-                  13 === suspendedReason.tag &&
-                  (suspendedReason.flags |= 16384);
-          }
-        else root = !0;
+        if (isHydrating || suspendedReason === SuspendedOnError) root = !0;
+        else if (
+          workInProgressRootIsPrerendering ||
+          0 !== (workInProgressRootRenderLanes & 536870912)
+        )
+          root = !1;
+        else if (
+          ((workInProgressRootDidSkipSuspendedSiblings = root = !0),
+          suspendedReason === SuspendedOnData ||
+            suspendedReason === SuspendedOnAction ||
+            suspendedReason === SuspendedOnImmediate ||
+            suspendedReason === SuspendedOnDeprecatedThrowPromise)
+        )
+          (suspendedReason = suspenseHandlerStackCursor.current),
+            null !== suspendedReason &&
+              13 === suspendedReason.tag &&
+              (suspendedReason.flags |= 16384);
         unwindUnitOfWork(unitOfWork, root);
       } else completeUnitOfWork(unitOfWork);
     }
@@ -17588,8 +17568,7 @@ __DEV__ &&
         );
       if (
         0 === (suspendedLanes & 3) ||
-        (enableSiblingPrerendering &&
-          checkIfRootIsPrerendering(root, suspendedLanes))
+        checkIfRootIsPrerendering(root, suspendedLanes)
       ) {
         currentTime = suspendedLanes & -suspendedLanes;
         if (
@@ -23133,7 +23112,6 @@ __DEV__ &&
       enableObjectFiber = dynamicFlagsUntyped.enableObjectFiber,
       enablePersistedModeClonedFlag =
         dynamicFlagsUntyped.enablePersistedModeClonedFlag,
-      enableSiblingPrerendering = dynamicFlagsUntyped.enableSiblingPrerendering,
       renameElementSymbol = dynamicFlagsUntyped.renameElementSymbol,
       enableFragmentRefs = dynamicFlagsUntyped.enableFragmentRefs,
       searchTarget = null,
@@ -26978,11 +26956,11 @@ __DEV__ &&
     };
     (function () {
       var isomorphicReactPackageVersion = React.version;
-      if ("19.2.0-native-fb-9b79292a-20250508" !== isomorphicReactPackageVersion)
+      if ("19.2.0-native-fb-4ca97e48-20250508" !== isomorphicReactPackageVersion)
         throw Error(
           'Incompatible React versions: The "react" and "react-dom" packages must have the exact same version. Instead got:\n  - react:      ' +
             (isomorphicReactPackageVersion +
-              "\n  - react-dom:  19.2.0-native-fb-9b79292a-20250508\nLearn more: https://react.dev/warnings/version-mismatch")
+              "\n  - react-dom:  19.2.0-native-fb-4ca97e48-20250508\nLearn more: https://react.dev/warnings/version-mismatch")
         );
     })();
     ("function" === typeof Map &&
@@ -27019,10 +26997,10 @@ __DEV__ &&
       !(function () {
         var internals = {
           bundleType: 1,
-          version: "19.2.0-native-fb-9b79292a-20250508",
+          version: "19.2.0-native-fb-4ca97e48-20250508",
           rendererPackageName: "react-dom",
           currentDispatcherRef: ReactSharedInternals,
-          reconcilerVersion: "19.2.0-native-fb-9b79292a-20250508"
+          reconcilerVersion: "19.2.0-native-fb-4ca97e48-20250508"
         };
         internals.overrideHookState = overrideHookState;
         internals.overrideHookStateDeletePath = overrideHookStateDeletePath;
@@ -27160,5 +27138,5 @@ __DEV__ &&
       listenToAllSupportedEvents(container);
       return new ReactDOMHydrationRoot(initialChildren);
     };
-    exports.version = "19.2.0-native-fb-9b79292a-20250508";
+    exports.version = "19.2.0-native-fb-4ca97e48-20250508";
   })();