From daccd1709ef1913e23d1b2f15dfeb16ac6e70ed8 Mon Sep 17 00:00:00 2001
From: est31 <MTest31@outlook.com>
Date: Thu, 17 Sep 2020 17:20:22 +0200
Subject: [PATCH] Replace loop with drop_in_place call

---
 compiler/rustc_arena/src/lib.rs | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/compiler/rustc_arena/src/lib.rs b/compiler/rustc_arena/src/lib.rs
index 2edf822cdb1..0d0b1efd2de 100644
--- a/compiler/rustc_arena/src/lib.rs
+++ b/compiler/rustc_arena/src/lib.rs
@@ -66,12 +66,7 @@ impl<T> TypedArenaChunk<T> {
         // The branch on needs_drop() is an -O1 performance optimization.
         // Without the branch, dropping TypedArena<u8> takes linear time.
         if mem::needs_drop::<T>() {
-            let mut start = self.start();
-            // Destroy all allocated objects.
-            for _ in 0..len {
-                ptr::drop_in_place(start);
-                start = start.offset(1);
-            }
+            ptr::drop_in_place(MaybeUninit::slice_assume_init_mut(&mut self.storage[..len]));
         }
     }