React sync for revisions 1c2876d...7a3416f

Reviewed By: bvaughn

Differential Revision: D7526137

fbshipit-source-id: 9f9db8a6b56cb4ae581a7b8d28079ec38de2180f

Author: hramos

Libraries/Renderer/REVISION

@@ -1 +1 @@
-1c2876d5b558b8591feb335d8d7204bc46f7da8a
+7a3416f27532ac25849dfbc505300d469b43bbcc

Libraries/Renderer/ReactFabric-dev.js

@@ -4765,6 +4765,14 @@ var ReactStrictModeWarnings = {
   var didWarnAboutDeprecatedLifecycles = new Set();
   var didWarnAboutUnsafeLifecycles = new Set();
 
+  var setToSortedString = function(set) {
+    var array = [];
+    set.forEach(function(value) {
+      array.push(value);
+    });
+    return array.sort().join(", ");
+  };
+
   ReactStrictModeWarnings.discardPendingWarnings = function() {
     pendingComponentWillMountWarnings = [];
     pendingComponentWillReceivePropsWarnings = [];
@@ -4790,9 +4798,7 @@ var ReactStrictModeWarnings = {
 
           var formatted = lifecycle.replace("UNSAFE_", "");
           var suggestion = LIFECYCLE_SUGGESTIONS[lifecycle];
-          var sortedComponentNames = Array.from(componentNames)
-            .sort()
-            .join(", ");
+          var sortedComponentNames = setToSortedString(componentNames);
 
           lifecyclesWarningMesages.push(
             formatted +
@@ -4844,9 +4850,7 @@ var ReactStrictModeWarnings = {
         didWarnAboutDeprecatedLifecycles.add(fiber.type);
       });
 
-      var sortedNames = Array.from(uniqueNames)
-        .sort()
-        .join(", ");
+      var sortedNames = setToSortedString(uniqueNames);
 
       lowPriorityWarning$1(
         false,
@@ -4869,9 +4873,7 @@ var ReactStrictModeWarnings = {
         didWarnAboutDeprecatedLifecycles.add(fiber.type);
       });
 
-      var _sortedNames = Array.from(_uniqueNames)
-        .sort()
-        .join(", ");
+      var _sortedNames = setToSortedString(_uniqueNames);
 
       lowPriorityWarning$1(
         false,
@@ -4893,9 +4895,7 @@ var ReactStrictModeWarnings = {
         didWarnAboutDeprecatedLifecycles.add(fiber.type);
       });
 
-      var _sortedNames2 = Array.from(_uniqueNames2)
-        .sort()
-        .join(", ");
+      var _sortedNames2 = setToSortedString(_uniqueNames2);
 
       lowPriorityWarning$1(
         false,
@@ -6217,7 +6217,6 @@ var ReactFiberClassComponent = function(
       if (
         typeof instance.getSnapshotBeforeUpdate === "function" &&
         typeof instance.componentDidUpdate !== "function" &&
-        typeof instance.componentDidUpdate !== "function" &&
         !didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate.has(type)
       ) {
         didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate.add(type);
@@ -9199,6 +9198,10 @@ var ReactFiberBeginWork = function(
         changedBits,
         renderExpirationTime
       );
+    } else if (oldProps === newProps) {
+      // Skip over a memoized parent with a bitmask bailout even
+      // if we began working on it because of a deeper matching child.
+      return bailoutOnAlreadyFinishedWork(current, workInProgress);
     }
     // There is no bailout on `children` equality because we expect people
     // to often pass a bound method as a child, but it may reference

Libraries/Renderer/ReactFabric-prod.js

@@ -3656,33 +3656,40 @@ function ReactFiberBeginWork(
             renderExpirationTime
           );
         case 12:
-          fn = workInProgress.type;
-          unmaskedContext = workInProgress.pendingProps;
-          var oldProps = workInProgress.memoizedProps;
-          props = fn._currentValue;
-          updateQueue = fn._changedBits;
-          if (
-            hasLegacyContextChanged() ||
-            0 !== updateQueue ||
-            oldProps !== unmaskedContext
-          ) {
-            workInProgress.memoizedProps = unmaskedContext;
-            oldProps = unmaskedContext.unstable_observedBits;
-            if (void 0 === oldProps || null === oldProps) oldProps = 1073741823;
-            workInProgress.stateNode = oldProps;
-            0 !== (updateQueue & oldProps) &&
-              propagateContextChange(
-                workInProgress,
-                fn,
-                updateQueue,
-                renderExpirationTime
-              );
-            renderExpirationTime = unmaskedContext.children;
-            renderExpirationTime = renderExpirationTime(props);
-            reconcileChildren(current, workInProgress, renderExpirationTime);
-            current = workInProgress.child;
-          } else
-            current = bailoutOnAlreadyFinishedWork(current, workInProgress);
+          a: {
+            fn = workInProgress.type;
+            unmaskedContext = workInProgress.pendingProps;
+            updateQueue = workInProgress.memoizedProps;
+            props = fn._currentValue;
+            var changedBits = fn._changedBits;
+            if (
+              hasLegacyContextChanged() ||
+              0 !== changedBits ||
+              updateQueue !== unmaskedContext
+            ) {
+              workInProgress.memoizedProps = unmaskedContext;
+              var observedBits = unmaskedContext.unstable_observedBits;
+              if (void 0 === observedBits || null === observedBits)
+                observedBits = 1073741823;
+              workInProgress.stateNode = observedBits;
+              if (0 !== (changedBits & observedBits))
+                propagateContextChange(
+                  workInProgress,
+                  fn,
+                  changedBits,
+                  renderExpirationTime
+                );
+              else if (updateQueue === unmaskedContext) {
+                current = bailoutOnAlreadyFinishedWork(current, workInProgress);
+                break a;
+              }
+              renderExpirationTime = unmaskedContext.children;
+              renderExpirationTime = renderExpirationTime(props);
+              reconcileChildren(current, workInProgress, renderExpirationTime);
+              current = workInProgress.child;
+            } else
+              current = bailoutOnAlreadyFinishedWork(current, workInProgress);
+          }
           return current;
         default:
           invariant(