--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr51695.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,52 @@
+/* PR debug/51695 */
+/* { dg-do compile { target { int32plus } } } */
+/* { dg-options "-O2 -g" } */
+
+typedef struct
+{
+  struct { unsigned int t1, t2, t3, t4, t5, t6; } t;
+  int p;
+  struct { double X, Y, Z; } r;
+} T;
+typedef struct { T *h; } S;
+
+static unsigned int v = 0x12345678;
+
+int
+foo (void)
+{
+  v = (v & 0x80000000) ? ((v << 1) ^ 0xa398655d) : (v << 1);
+  return 0;
+}
+
+double
+bar (void)
+{
+  unsigned int o;
+  v = (v & 0x80000000) ? ((v << 1) ^ 0xa398655d) : (v << 1);
+  o = v & 0xffff;
+  return (double) o / 32768.0;
+}
+
+int
+baz (void)
+{
+  foo ();
+  return 0;
+}
+
+void
+test (S *x)
+{
+  T *t = x->h;
+  t->t.t1 = foo ();
+  t->t.t2 = foo ();
+  t->t.t3 = foo ();
+  t->t.t4 = foo ();
+  t->t.t5 = foo ();
+  t->t.t6 = foo ();
+  t->p = baz ();
+  t->r.X = bar ();
+  t->r.Y = bar ();
+  t->r.Z = bar ();
+}