re PR tree-optimization/40052 (missed optimizations on (extended) logical types: (x | 1) --> 1)

2011-04-28  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/40052
	PR tree-optimization/15347
	* gcc.dg/tree-ssa/vrp57.c: New testcase.
	* gcc.dg/pr15347.c: Likewise.

From-SVN: r173064

gcc/testsuite/ChangeLog

+2011-04-28  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/40052
+	PR tree-optimization/15347
+	* gcc.dg/tree-ssa/vrp57.c: New testcase.
+	* gcc.dg/pr15347.c: Likewise.
+
 2011-04-28  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/48530

gcc/testsuite/gcc.dg/pr15347.c

+/* { dg-do link } */
+
+extern void link_error (void);
+int
+main ()
+{
+  if ("<12ers" + 1 == 0)
+    link_error ();
+  return 0;
+}

gcc/testsuite/gcc.dg/tree-ssa/vrp57.c

+/* PR40052 */
+/* { dg-do compile } */
+/* { dg-options "-O -ftree-vrp -fdump-tree-optimized" } */
+
+int foo(_Bool b)
+{
+    return b | 1;
+}
+
+int bar(_Bool b)
+{
+    return b & -2;
+}
+
+/* { dg-final { scan-tree-dump "return 0;" "optimized" } } */
+/* { dg-final { scan-tree-dump "return 1;" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */