1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr47991.c b/gcc/testsuite/gcc.dg/pr47991.c
new file mode 100644
index 000000000..688be5c02
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr47991.c
@@ -0,0 +1,25 @@
+/* PR debug/47991 */
+/* { dg-do compile } */
+/* { dg-options "-g -Os" } */
+
+typedef __SIZE_TYPE__ size_t;
+extern inline __attribute__ ((__always_inline__))
+void *
+memset (void *x, int y, size_t z)
+{
+  return __builtin___memset_chk (x, y, z, __builtin_object_size (x, 0));
+}
+
+void
+foo (unsigned char *x, unsigned char *y, unsigned char *z,
+     unsigned char *w, unsigned int v, int u, int t)
+{
+  int i;
+  for (i = 0; i < t; i++)
+    {
+      memset (z, x[0], v);
+      memset (w, y[0], v);
+      x += u;
+    }
+  __builtin_memcpy (z, x, u);
+}