From 49f01413748f536f49b3d14845dbe5dd717b6b84 Mon Sep 17 00:00:00 2001
From: Santiago Pastorino <spastorino@gmail.com>
Date: Thu, 2 May 2019 01:07:44 +0200
Subject: [PATCH] Implement base_local iteratively

---
 src/librustc/mir/mod.rs | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/librustc/mir/mod.rs b/src/librustc/mir/mod.rs
index 0dc23f5ce47..f23ff47b5ff 100644
--- a/src/librustc/mir/mod.rs
+++ b/src/librustc/mir/mod.rs
@@ -2055,10 +2055,13 @@ pub fn local(&self) -> Option<Local> {
 
     /// Finds the innermost `Local` from this `Place`.
     pub fn base_local(&self) -> Option<Local> {
-        match self {
-            Place::Base(PlaceBase::Local(local)) => Some(*local),
-            Place::Projection(box Projection { base, elem: _ }) => base.base_local(),
-            Place::Base(PlaceBase::Static(..)) => None,
+        let mut place = self;
+        loop {
+            match place {
+                Place::Projection(proj) => place = &proj.base,
+                Place::Base(PlaceBase::Static(_)) => return None,
+                Place::Base(PlaceBase::Local(local)) => return Some(*local),
+            }
         }
     }
 
-- 
2.44.0