1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/torture/pr81249.C b/gcc/testsuite/g++.dg/torture/pr81249.C
new file mode 100644
index 00000000000..7bf617b0421
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr81249.C
@@ -0,0 +1,25 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-mavx2 -mprefer-avx128" { target x86_64-*-* i?86-*-* } } */
+
+typedef struct rtx_def *rtx;
+union rtunion {
+    rtx rt_rtx;
+};
+struct rtx_def {
+    struct {
+	rtunion fld[0];
+    } u;
+    rtx elem[];
+} a;
+int b, c, d;
+rtx e;
+int main() {
+    for (;;) {
+	d = 0;
+	for (; d < b; d++)
+	  if (a.elem[d])
+	    e = a.elem[d]->u.fld[1].rt_rtx;
+	if (e)
+	  c = 0;
+    }
+}