1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/genmatch.c b/gcc/genmatch.c
index 5621aa05b59..3527e499cbf 100644
--- a/gcc/genmatch.c
+++ b/gcc/genmatch.c
@@ -2054,7 +2054,11 @@ capture_info::walk_match (operand *o, unsigned toplevel_arg,
       if (c->what
 	  && (e = dyn_cast <expr *> (c->what)))
 	{
-	  info[where].expr_p = true;
+	  /* Zero-operand expression captures like ADDR_EXPR@0 are
+	     similar as predicates -- if they are not mentioned in
+	     the result we have to force them to have no side-effects.  */
+	  if (e->ops.length () != 0)
+	    info[where].expr_p = true;
 	  info[where].force_single_use |= e->force_single_use;
 	}
     }