re PR c++/58950 (Missing "statement has no effect")

2014-01-03  Marc Glisse  <marc.glisse@inria.fr>

	PR c++/58950
gcc/cp/
	* cvt.c (convert_to_void): Handle VEC_PERM_EXPR and VEC_COND_EXPR.
gcc/testsuite/
	* g++.dg/pr58950.C: New file.

From-SVN: r206325

gcc/cp/ChangeLog

+2014-01-03  Marc Glisse  <marc.glisse@inria.fr>
+
+	PR c++/58950
+	* cvt.c (convert_to_void): Handle VEC_PERM_EXPR and VEC_COND_EXPR.
+
 2014-01-03  Tobias Burnus  <burnus@net-b.de>
 
 	PR c++/58567

gcc/cp/cvt.c

@@ -1403,7 +1403,9 @@ convert_to_void (tree expr, impl_conv_void implicit, tsubst_flags_t complain)
 			    || code == PREDECREMENT_EXPR
 			    || code == PREINCREMENT_EXPR
 			    || code == POSTDECREMENT_EXPR
-			    || code == POSTINCREMENT_EXPR)))
+			    || code == POSTINCREMENT_EXPR))
+		   || code == VEC_PERM_EXPR
+		   || code == VEC_COND_EXPR)
                   && (complain & tf_warning))
 		warning_at (loc, OPT_Wunused_value, "value computed is not used");
 	    }

gcc/testsuite/ChangeLog

+2014-01-03  Marc Glisse  <marc.glisse@inria.fr>
+
+	PR c++/58950
+	* g++.dg/pr58950.C: New file.
+
 2014-01-03  Tobias Burnus  <burnus@net-b.de>
 
 	PR c++/58567

gcc/testsuite/g++.dg/pr58950.C

+/* { dg-do compile } */
+/* { dg-options "-Wall" } */
+
+void f(){
+  int i __attribute__((vector_size(2*sizeof(int)))) = { 2, 3 };
+  __builtin_shuffle (i, i); /* { dg-warning "value computed is not used" } */
+  ++i?1:0; /* { dg-warning "value computed is not used" } */
+}