From 1d4972e0e923bd5fffb11465373c824be109375f Mon Sep 17 00:00:00 2001
From: Hans Kratz <hans@appfour.com>
Date: Mon, 9 Aug 2021 12:59:23 +0000
Subject: [PATCH] Avoid unnecessary allocation.

---
 compiler/rustc_codegen_llvm/src/type_of.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/compiler/rustc_codegen_llvm/src/type_of.rs b/compiler/rustc_codegen_llvm/src/type_of.rs
index 225044c848857..180da1a6046e6 100644
--- a/compiler/rustc_codegen_llvm/src/type_of.rs
+++ b/compiler/rustc_codegen_llvm/src/type_of.rs
@@ -150,8 +150,8 @@ fn struct_llfields<'a, 'tcx>(
     } else {
         debug!("struct_llfields: offset: {:?} stride: {:?}", offset, layout.size);
     }
-
-    (result, packed, padding_used.then_some(Box::new(field_remapping)))
+    let field_remapping = if padding_used { Some(Box::new(field_remapping)) } else { None };
+    (result, packed, field_remapping)
 }
 
 impl<'a, 'tcx> CodegenCx<'a, 'tcx> {