1 files changed, 2 insertions, 0 deletions
diff --git a/gcc/cp/cvt.c b/gcc/cp/cvt.c
index 710bc74..83b35d6 100644
--- a/gcc/cp/cvt.c
+++ b/gcc/cp/cvt.c
@@ -960,6 +960,8 @@ convert_to_void (tree expr, const char *implicit)
 	}
       expr = build1 (CONVERT_EXPR, void_type_node, expr);
     }
+  if (! TREE_SIDE_EFFECTS (expr))
+    expr = void_zero_node;
   return expr;
 }