re PR rtl-optimization/10312 (optimizer creates wrong code for loop)

	PR optimization/10312
	* gcc.c-torture/execute/20031214-1.c: New.

From-SVN: r74625

gcc/testsuite/ChangeLog

+2003-12-15  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>
+
+	PR optimization/10312
+	* gcc.c-torture/execute/20031214-1.c: New.
+
 2003-12-14  Mark Mitchell  <mark@codesourcery.com>
 
 	PR c++/10779

gcc/testsuite/gcc.c-torture/execute/20031214-1.c

+/* PR optimization/10312 */
+/* Originator: Peter van Hoof <p dot van-hoof at qub dot ac dot uk> */
+
+/* Verify that the strength reduction pass doesn't find
+   illegitimate givs.  */
+
+struct
+{
+  double a;
+  int n[2];
+} g = { 0., { 1, 2}};
+
+int k = 0;
+
+void
+b (int *j)
+{
+}
+
+int
+main ()
+{
+  int j;
+
+  for (j = 0; j < 2; j++)
+    k = (k > g.n[j]) ? k : g.n[j];
+
+  k++;
+  b (&j);
+
+  return 0;
+}