From 4d1194c31a8548f554212abb8fa724319631e2fc Mon Sep 17 00:00:00 2001
From: Dylan MacKenzie <ecstaticmorse@gmail.com>
Date: Sat, 28 Mar 2020 14:09:34 -0700
Subject: [PATCH] Ensure output dir for dataflow results exists

---
 src/librustc_mir/dataflow/framework/engine.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/librustc_mir/dataflow/framework/engine.rs b/src/librustc_mir/dataflow/framework/engine.rs
index 54263287e022..6d3b453bfc02 100644
--- a/src/librustc_mir/dataflow/framework/engine.rs
+++ b/src/librustc_mir/dataflow/framework/engine.rs
@@ -444,7 +444,12 @@ where
 
     let graphviz = graphviz::Formatter::new(body, def_id, results, &mut *formatter);
     dot::render_opts(&graphviz, &mut buf, &[dot::RenderOption::Monospace])?;
+
+    if let Some(parent) = path.parent() {
+        fs::create_dir_all(parent)?;
+    }
     fs::write(&path, buf)?;
+
     Ok(())
 }