===================================================================
@@ -1396,21 +1396,23 @@ convert_to_void (tree expr, impl_conv_vo
code = TREE_CODE (e);
tclass = TREE_CODE_CLASS (code);
if ((tclass == tcc_comparison
|| tclass == tcc_unary
|| (tclass == tcc_binary
&& !(code == MODIFY_EXPR
|| code == INIT_EXPR
|| 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");
}
}
expr = build1 (CONVERT_EXPR, void_type_node, expr);
}
if (! TREE_SIDE_EFFECTS (expr))
expr = void_zero_node;
return expr;
}
===================================================================
@@ -0,0 +1,8 @@
+/* { 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" } */
+}
Hello, this is the piece of patch you commented on in the PR. Bootstrap+testsuite on x86_64-unknown-linux-gnu. 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.