Link to rustc-guide update docs
diff --git a/README.md b/README.md
index 5783594..53204a6 100644
--- a/README.md
+++ b/README.md
@@ -8,3 +8,7 @@
Despite this being a "fork" it's more of just a place where we can easily tweak
the LLVM source for Rust's own build. All patches should by default go upstream
first, and then we can cherry-pick them onto our branches if necessary.
+
+To learn more about updating LLVM in the Rust compiler, consult the
+[documentation for doing so in
+`rustc-guide`](https://rust-lang.github.io/rustc-guide/codegen/updating-llvm.html)
