1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pr93946-2.c b/gcc/testsuite/gcc.dg/torture/pr93946-2.c
new file mode 100644
index 00000000000..4c73e58f407
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr93946-2.c
@@ -0,0 +1,28 @@
+/* { dg-do run } */
+/* { dg-additional-options "-fno-tree-dse" } */
+
+union U { long long i; long f; };
+struct a {union U u;};
+struct aa {struct a a;};
+struct b {union U u;};
+struct bb {struct b b;};
+
+long __attribute__((noipa))
+foo (struct bb *bv, void *ptr)
+{
+  struct aa *a = ptr;
+  struct bb *b = ptr;
+  bv->b.u.f = 1;
+  a->a.u.i = 0;
+  b->b.u.f = 0;
+  return bv->b.u.f;
+}
+
+int
+main ()
+{
+  union C {struct aa aa; struct bb bb;} v;
+  if (foo (&v.bb, &v) != 0)
+    __builtin_abort ();
+  return 0;
+}