diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_atomic_clang_other.h b/compiler-rt/lib/sanitizer_common/sanitizer_atomic_clang_other.h
--- a/compiler-rt/lib/sanitizer_common/sanitizer_atomic_clang_other.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_atomic_clang_other.h
@@ -53,8 +53,7 @@
     // 64-bit load on 32-bit platform.
     // Gross, but simple and reliable.
     // Assume that it is not in read-only memory.
-    v = __sync_fetch_and_add(
-        const_cast<typename T::Type volatile *>(&a->val_dont_use), 0);
+    __atomic_load(const_cast<typename T::Type volatile *>(&a->val_dont_use), &v, __ATOMIC_SEQ_CST);
   }
   return v;
 }
@@ -81,14 +80,7 @@
   } else {
     // 64-bit store on 32-bit platform.
     // Gross, but simple and reliable.
-    typename T::Type cmp = a->val_dont_use;
-    typename T::Type cur;
-    for (;;) {
-      cur = __sync_val_compare_and_swap(&a->val_dont_use, cmp, v);
-      if (cur == cmp || cur == v)
-        break;
-      cmp = cur;
-    }
+    __atomic_store(&a->val_dont_use, &v, __ATOMIC_SEQ_CST);
   }
 }