1 files changed, 31 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/tsan/aligned_vs_unaligned_race.C b/gcc/testsuite/g++.dg/tsan/aligned_vs_unaligned_race.C
new file mode 100644
index 00000000000..ccac527e1d4
--- /dev/null
+++ b/gcc/testsuite/g++.dg/tsan/aligned_vs_unaligned_race.C
@@ -0,0 +1,31 @@
+/* { dg-do run { target { x86_64-*-linux* } } } */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdint.h>
+
+uint64_t Global[2];
+
+void *Thread1(void *x) {
+  Global[1]++;
+  return NULL;
+}
+
+void *Thread2(void *x) {
+  char *p1 = reinterpret_cast<char *>(&Global[0]);
+  uint64_t *p4 = reinterpret_cast<uint64_t *>(p1 + 1);
+  (*p4)++;
+  return NULL;
+}
+
+int main() {
+  pthread_t t[2];
+  pthread_create(&t[0], NULL, Thread1, NULL);
+  pthread_create(&t[1], NULL, Thread2, NULL);
+  pthread_join(t[0], NULL);
+  pthread_join(t[1], NULL);
+  printf("Pass\n");
+  /* { dg-prune-output "ThreadSanitizer: data race.*(\n|\r\n|\r)" } */
+  /* { dg-output "Pass.*" } */
+  return 0;
+}