1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/opt/vrp2.C b/gcc/testsuite/g++.dg/opt/vrp2.C
new file mode 100644
index 000000000..b2066ae2e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/vrp2.C
@@ -0,0 +1,20 @@
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+/* VRP was miscompiling the following as it thought &a->b was a dereference
+   and therfore a was non-null.  
+   Reduced from Mozilla by Serge Belyshev <belyshev@depni.sinp.msu.ru>.  */
+
+extern "C" void abort (void);
+struct T { int i; } t;
+struct A : T { int j; } *p = __null;
+
+int main (void)
+{
+  if (p == &t)
+    return 0;
+  if (p)
+    abort ();
+  return 0;
+}
+