1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr45991.c b/gcc/testsuite/gcc.dg/pr45991.c
new file mode 100644
index 000000000..eefce4429
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr45991.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fstrict-overflow" } */
+
+struct S
+{
+  int i;
+};
+
+char A[64];
+
+void foo (char **dst, int i)
+{
+  char *p = A + 16;
+  while (i--)
+    {
+      int b = ((struct S *) (&p[i * 16 + 4]))->i;
+      char *c = A + i * 16;
+      dst[i] = c + b;
+    }
+}