From 9295f356bb30f283219b3fd32542f0096cfb9316 Mon Sep 17 00:00:00 2001
From: Louis Dionne <ldionne@apple.com>
Date: Fri, 1 May 2020 11:04:34 -0400
Subject: [PATCH] [libc++] Avoid using GNU extension in test, which triggers a
 warning

---
 libcxx/test/libcxx/atomics/atomics.align/align.pass.sh.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/libcxx/test/libcxx/atomics/atomics.align/align.pass.sh.cpp b/libcxx/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
index 1b2eebc..835475e 100644
--- a/libcxx/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
+++ b/libcxx/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
@@ -28,11 +28,14 @@
 #include <atomic>
 #include <cassert>
 
-template <typename T> struct atomic_test : public std::__atomic_base<T> {
+template <typename T>
+struct atomic_test : public std::__atomic_base<T> {
   atomic_test() {
-    if (this->is_lock_free())
-      assert(alignof(this->__a_) >= sizeof(this->__a_) &&
+    if (this->is_lock_free()) {
+      using AtomicImpl = decltype(this->__a_);
+      assert(alignof(AtomicImpl) >= sizeof(AtomicImpl) &&
              "expected natural alignment for lock-free type");
+    }
   }
 };
 
-- 
2.7.4