--- /dev/null
+/* PR middle-end/100571 - bogus -Wstringop-overflow with VLA of elements
+ larger than byte
+ { dg-do compile }
+ { dg-options "-O2 -Wall" } */
+
+__attribute__ ((access (read_only, 1, 2))) void fro (int *, int);
+__attribute__ ((access (write_only, 1, 2))) void fwo (int *, int);
+__attribute__ ((access (read_write, 1, 2))) void frw (int *, int);
+
+extern __SIZE_TYPE__ n;
+
+void alloca_ro (void)
+{
+ int *a = __builtin_alloca (n * sizeof *a);
+ a[0] = 0;
+ fro (a, n);
+}
+
+void alloca_wo (void)
+{
+ int *a = __builtin_alloca (n * sizeof *a);
+ fwo (a, n);
+}
+
+void alloca_rw (void)
+{
+ int *a = __builtin_alloca (n * sizeof *a);
+ a[0] = 0;
+ frw (a, n);
+}
+
+
+void calloc_ro (void)
+{
+ int *a = __builtin_calloc (n, sizeof *a);
+ fro (a, n);
+}
+
+void calloc_wo (void)
+{
+ int *a = __builtin_calloc (n, sizeof *a);
+ fwo (a, n);
+}
+
+void calloc_rw (void)
+{
+ int *a = __builtin_calloc (n, sizeof *a);
+ a[0] = 0;
+ frw (a, n);
+}
+
+
+void malloc_ro (void)
+{
+ int *a = __builtin_malloc (n * sizeof *a);
+ a[0] = 0;
+ fro (a, n);
+}
+
+void malloc_wo (void)
+{
+ int *a = __builtin_malloc (n * sizeof *a);
+ fwo (a, n);
+}
+
+void malloc_rw (void)
+{
+ int *a = __builtin_malloc (n * sizeof *a);
+ a[0] = 0;
+ frw (a, n);
+}
+
+
+void vla_ro (void)
+{
+ int a[n];
+ a[0] = 0;
+ fro (a, n);
+}
+
+void vla_wo (void)
+{
+ int a[n];
+ fwo (a, n);
+}
+
+void vla_rw (void)
+{
+ int a[n];
+ a[0] = 0;
+ frw (a, n);
+}