re PR c++/69872 (-Wnarrowing note without warning/errror)

/cp
2016-05-24  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/69872
	* typeck2.c (check_narrowing): Check pedwarn return value.

/testsuite
2016-05-24  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/69872
	* g++.dg/warn/Wno-narrowing1.C: New.

From-SVN: r236651

gcc/cp/ChangeLog

+2016-05-24  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/69872
+	* typeck2.c (check_narrowing): Check pedwarn return value.
+
 2016-05-24  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/71257

gcc/cp/typeck2.c

@@ -950,10 +950,12 @@ check_narrowing (tree type, tree init, tsubst_flags_t complain)
 	{
 	  if (complain & tf_warning_or_error)
 	    {
-	      if (!almost_ok || pedantic)
-		pedwarn (loc, OPT_Wnarrowing, "narrowing conversion of %qE "
-			 "from %qT to %qT inside { }", init, ftype, type);
-	      if (pedantic && almost_ok)
+	      if ((!almost_ok || pedantic)
+		  && pedwarn (loc, OPT_Wnarrowing,
+			      "narrowing conversion of %qE "
+			      "from %qT to %qT inside { }",
+			      init, ftype, type)
+		  && almost_ok)
 		inform (loc, " the expression has a constant value but is not "
 			"a C++ constant-expression");
 	      ok = true;

gcc/testsuite/ChangeLog

+2016-05-24  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/69872
+	* g++.dg/warn/Wno-narrowing1.C: New.
+
 2016-05-24  Marek Polacek  <polacek@redhat.com>
 
 	PR c/71249

gcc/testsuite/g++.dg/warn/Wno-narrowing1.C

+// PR c++/69872
+// { dg-options "-Wall -Wextra -pedantic -Wno-narrowing" }
+
+struct s { int x, y; };
+short offsets[1] = {
+  ((char*) &(((struct s*)16)->y) - (char *)16),  // { dg-bogus "note" }
+};