From aa5c49cf2f5425344b7859de73b6d347b851f694 Mon Sep 17 00:00:00 2001
From: bjorn3 <bjorn3@users.noreply.github.com>
Date: Sat, 18 Jan 2020 18:31:01 +0100
Subject: [PATCH] Make unused stack slots zero sized in stack2reg

---
 src/optimize/stack2reg.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/optimize/stack2reg.rs b/src/optimize/stack2reg.rs
index b1afa9ab8bb..8fa5fb13c2e 100644
--- a/src/optimize/stack2reg.rs
+++ b/src/optimize/stack2reg.rs
@@ -237,7 +237,7 @@ pub(super) fn optimize_function<T: std::fmt::Debug>(
         }
 
         if users.stack_store.is_empty() && users.stack_load.is_empty() {
-            // FIXME make stack_slot zero sized.
+            opt_ctx.ctx.func.stack_slots[stack_slot.0].size = 0;
         }
     }