re PR rtl-optimization/16536 (Incorrect __restrict__ optimization in -O2)

	PR rtl-optimization/16536
	* gcc.c-torture/execute/restrict-1.c: New test.

From-SVN: r84791

gcc/testsuite/ChangeLog

+2004-07-16  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
+
+	PR rtl-optimization/16536
+	* gcc.c-torture/execute/restrict-1.c: New test.
+
 2004-07-15  Tobias Schlueter  <tobias.schlueter@physik.uni-muenchen.de>
 
 	PR fortran/15324

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

+/*  PR rtl-optimization/16536
+    Origin:  Jeremy Denise      <jeremy.denise@libertysurf.fr>
+    Reduced: Wolfgang Bangerth  <bangerth@dealii.org>
+             Volker Reichelt    <reichelt@igpm.rwth-aachen.de>  */
+
+extern void abort ();
+
+typedef struct
+{
+  int i, dummy;
+} A;
+
+inline A foo (const A* p, const A* q)
+{
+  return (A){p->i+q->i};
+}
+
+void bar (A* __restrict__ p)
+{
+  *p=foo(p,p);
+  if (p->i!=2)
+    abort();
+}
+
+int main ()
+{
+  A a={1};
+  bar(&a);
+  return 0;
+}