re PR tree-optimization/59924 (uninit memory hog)

	PR tree-optimization/59924
	* gcc.dg/pr59924.c: New test.

From-SVN: r207446

gcc/testsuite/ChangeLog

+2014-02-04  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/59924
+	* gcc.dg/pr59924.c: New test.
+
 2014-02-03  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR ipa/59831

gcc/testsuite/gcc.dg/pr59924.c

+/* PR tree-optimization/59924 */
+/* { dg-do compile } */
+/* { dg-options "-O1 -Wall" } */
+
+struct S { struct T *a; double b; struct S *c; };
+struct T { struct S *d; };
+extern void bar (double);
+
+void
+foo (struct S * x, int y, int z, int w)
+{
+  int e;
+  struct S *f;
+  for (f = x->a->d; f; f = f->c)
+    {
+      if (5 < w)
+	{
+	  e = -w;
+	  z = w;
+	}
+    }
+  if (y != 0 || z != 0)
+    {
+      double g = x->b + (double) e * (double) y; /* { dg-warning "may be used uninitialized in this function" } */
+      bar (g * g);
+    }
+}