--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/20070725-1.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,64 @@
+/* This used to fail due to a ifcombine problem wrecking 64bit
+   checks.  Fixed with rev. 126876.  */
+/* { dg-do run } */
+/* { dg-options "-O1" } */
+
+struct tree_base
+{
+  unsigned code:16;
+
+  unsigned side_effects_flag:1;
+  unsigned constant_flag:1;
+  unsigned addressable_flag:1;
+  unsigned volatile_flag:1;
+  unsigned readonly_flag:1;
+  unsigned unsigned_flag:1;
+  unsigned asm_written_flag:1;
+  unsigned nowarning_flag:1;
+
+  unsigned used_flag:1;
+  unsigned nothrow_flag:1;
+  unsigned static_flag:1;
+  unsigned public_flag:1;
+  unsigned private_flag:1;
+  unsigned protected_flag:1;
+  unsigned deprecated_flag:1;
+  unsigned invariant_flag:1;
+
+  unsigned lang_flag_0:1;
+  unsigned lang_flag_1:1;
+  unsigned lang_flag_2:1;
+  unsigned lang_flag_3:1;
+  unsigned lang_flag_4:1;
+  unsigned lang_flag_5:1;
+  unsigned lang_flag_6:1;
+  unsigned visited:1;
+
+  unsigned spare1:16;
+  unsigned spare2:8;
+  unsigned long  a;
+};
+
+int
+foo (struct tree_base *rhs)
+{
+  if (({const struct tree_base* __t = (rhs);  __t;})->readonly_flag
+      && (rhs)->static_flag)
+    return 1;
+
+  return 0;
+}
+
+extern void abort (void);
+
+int
+main ()
+{
+  struct tree_base t;
+
+  t.readonly_flag = t.static_flag = 0;
+  if (foo (&t))
+    abort ();
+
+  return 0;
+}