[committed] Add testcase from PR63804

[Jakub Jelinek]

Hi!

This PR got fixed some time ago, this patch adds a testcase for it.

2014-12-15  Jakub Jelinek  <ja...@redhat.com>

        PR rtl-optimization/63804
        * gcc.dg/pr63804.c: New test.

--- gcc/testsuite/gcc.dg/pr63804.c.jj   2014-12-15 17:35:31.978451234 +0100
+++ gcc/testsuite/gcc.dg/pr63804.c      2014-12-15 17:35:16.000000000 +0100
@@ -0,0 +1,52 @@
+/* PR rtl-optimization/63804 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -g" } */
+
+struct A { int gen; } e;
+int a, d;
+long b;
+enum B { C };
+struct D
+{
+  enum B type : 1;
+  int nr : 1;
+  struct { unsigned ud; } dw1;
+};
+enum B c;
+
+void
+fn1 (int p1)
+{
+  b = p1 & a;
+}
+
+int fn2 ();
+void fn3 ();
+
+void
+fn4 (struct D p1, unsigned p2, int p3)
+{
+  struct D f, g, h, j = p1, l, m = l;
+  struct A i = e;
+  if (i.gen)
+    p2 = 0;
+  j.type = c;
+  g = j;
+  p1 = g;
+  fn3 ();
+  int k = p2, v = p1.nr, p = v;
+  m.dw1.ud = k;
+  f = m;
+  h = f;
+  struct D n = h;
+  fn3 (n);
+  {
+    d = fn2 ();
+    int o = d;
+    fn1 (o);
+  }
+  if (i.gen)
+    fn3 (p1);
+  b = p & a;
+  fn3 (p3);
+}

        Jakub