re PR c/69900 (Unhelpful diagnostic about Ignored options)

	PR c/69900
	* common.opt (Wunreachable-code): Add Warning flag.

	* gcc.dg/pr69900.c: New test.

From-SVN: r233630

gcc/ChangeLog

+2016-02-23  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/69900
+	* common.opt (Wunreachable-code): Add Warning flag.
+
 2016-02-23  Mark Wielaard  <mjw@redhat.com>
 	    Jakub Jelinek  <jakub@redhat.com>
 

gcc/common.opt

@@ -728,7 +728,7 @@ Common Var(warn_maybe_uninitialized) Warning EnabledBy(Wuninitialized)
 Warn about maybe uninitialized automatic variables.
 
 Wunreachable-code
-Common Ignore
+Common Ignore Warning
 Does nothing. Preserved for backward compatibility.
 
 Wunused

gcc/testsuite/ChangeLog

+2016-02-23  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/69900
+	* gcc.dg/pr69900.c: New test.
+
 2016-02-23  Martin Jambor  <mjambor@suse.cz>
 
 	PR tree-optimization/69666

gcc/testsuite/gcc.dg/pr69900.c

+/* PR c/69900 */
+/* { dg-do compile } */
+
+#pragma GCC diagnostic error "-Wunreachable-code"	/* { dg-bogus "is not an option that controls warnings" } */
+#pragma GCC diagnostic warning "-Wunreachable-code"	/* { dg-bogus "is not an option that controls warnings" } */
+#pragma GCC diagnostic ignored "-Wunreachable-code"	/* { dg-bogus "is not an option that controls warnings" } */