diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 4351007c3a4bcfc8da4c9980abc67583f74a0912..f5ba72f73495d9c36ee169381da9ee51074371a7 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2010-04-26  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR tree-optimization/43904
+	* gcc.dg/tree-ssa/tailcall-6.c: New.
+
 2010-04-26  Iain Sandoe  <iain.sandoe@sandoe-acoustics.co.uk>
 
 	PR testsuite/35165
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/tailcall-6.c b/gcc/testsuite/gcc.dg/tree-ssa/tailcall-6.c
new file mode 100644
index 0000000000000000000000000000000000000000..4997f9b8355b927c5488fbc09ca0fc7d9acbf336
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/tailcall-6.c
@@ -0,0 +1,33 @@
+/* PR tree-optimization/43904.  */
+/* { dg-do run } */
+/* { dg-options "-O1 -foptimize-sibling-calls" } */
+
+typedef __SIZE_TYPE__ size_t;
+extern void abort(void);
+
+void *memcpy(void *dest, const void *src, size_t n);
+
+void
+buggy_init(void *ptr, size_t size)
+{
+  const char *str = "Hello world!";
+  memcpy(ptr, &str, size);
+}
+
+void
+expose_bug(void *ptr, size_t size)
+{
+  const char *str;
+  memcpy(&str, ptr, size);
+  if (*str != 'H')
+    abort ();
+}
+
+int
+main()
+{
+  const char *ptr;
+  buggy_init(&ptr, sizeof(ptr));
+  expose_bug(&ptr, sizeof(ptr));
+  return 0;
+}