diff --git a/compiler-rt/test/msan/libatomic.c b/compiler-rt/test/msan/libatomic.c
--- a/compiler-rt/test/msan/libatomic.c
+++ b/compiler-rt/test/msan/libatomic.c
@@ -1,6 +1,6 @@
-// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -latomic -DTEST_STORE -O0 %s -o %t && %run %t 2>&1
-// RUN: %clangxx_msan -fsanitize-memory-track-origins=0 -latomic -DTEST_LOAD -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK
-// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -latomic -DTEST_LOAD -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-SHADOW
+// RUN: %clangxx_msan -xc -fsanitize-memory-track-origins=2 -latomic -DTEST_STORE -O0 %s -o %t && %run %t 2>&1
+// RUN: %clangxx_msan -xc -fsanitize-memory-track-origins=0 -latomic -DTEST_LOAD -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK
+// RUN: %clangxx_msan -xc -fsanitize-memory-track-origins=2 -latomic -DTEST_LOAD -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-SHADOW
 
 #include <sanitizer/msan_interface.h>
 #include <stdatomic.h>