Rollup merge of #21550 - FlaPer87:fix-compiletest, r=huonw

Author: flaper87

src/compiletest/common.rs

@@ -12,6 +12,20 @@ pub use self::Mode::*;
 use std::fmt;
 use std::str::FromStr;
 
+#[cfg(stage0)] // NOTE: remove impl after snapshot
+#[derive(Clone, PartialEq, Show)]
+pub enum Mode {
+    CompileFail,
+    RunFail,
+    RunPass,
+    RunPassValgrind,
+    Pretty,
+    DebugInfoGdb,
+    DebugInfoLldb,
+    Codegen
+}
+
+#[cfg(not(stage0))] // NOTE: remove cfg after snapshot
 #[derive(Clone, PartialEq, Debug)]
 pub enum Mode {
     CompileFail,
@@ -24,6 +38,7 @@ pub enum Mode {
     Codegen
 }
 
+
 impl Copy for Mode {}
 
 impl FromStr for Mode {