diff --git a/.gitignore b/.gitignore
index 81a472451d7..1c47ed4c024 100644
--- a/.gitignore
+++ b/.gitignore
@@ -52,3 +52,6 @@ config.stamp
 Session.vim
 .cargo
 no_llvm_build
+# Generated when dumping Graphviz output for debugging:
+/mir_dump/
+/*.dot