support empty emitter (in contrast to no emitter if you don't specify anything)

diff --git a/ir/be/scripts/generate_emitter.pl b/ir/be/scripts/generate_emitter.pl
index 7edb847..6fe175f 100755 (executable)
--- a/ir/be/scripts/generate_emitter.pl
+++ b/ir/be/scripts/generate_emitter.pl
@@ -43,14 +43,21 @@ foreach my $op (keys(%nodes)) {
        my %n = %{ $nodes{"$op"} };
 
        # skip this node description if no emit information is available
-       next if (!$n{"emit"} || length($n{"emit"}) < 1);
+       next if (!defined($n{"emit"}));
 
        $line = "static void emit_".$arch."_".$op."(const ir_node *n, $arch\_emit_env_t *env)";
+
+       push(@obst_register, "  BE_EMIT($op);\n");
+
+       if($n{"emit"} eq "") {
+               push(@obst_func, $line." {\n");
+               push(@obst_func, "}\n\n");
+               next;
+       }
+
        push(@obst_func, $line." {\n  FILE *F = env->out;\n");
        push(@obst_func, "  char cmd_buf[256], cmnt_buf[256];\n");
        push(@obst_func, "  const lc_arg_env_t *arg_env = $arch\_get_arg_env();\n\n");
-       push(@obst_register, "  BE_EMIT($op);\n");
-
        my @emit = split(/\n/, $n{"emit"});
 
        foreach my $template (@emit) {