Merge remote-tracking branch 'origin/main' into rebranch

Author: swift-ci

include/swift/Runtime/Concurrent.h

@@ -881,7 +881,7 @@ struct ConcurrentReadableHashMap {
     auto *newElements = ElementStorage::allocate(newCapacity);
 
     if (elements) {
-      if constexpr (std::is_trivially_copyable<ElemTy>::value) {
+      if (std::is_trivially_copyable<ElemTy>::value) {
         memcpy(newElements->data(), elements->data(),
                elementCount * sizeof(ElemTy));
       } else {