From 4ce9c65cfbebcab0b0c409d4573e4a3ccca5be93 Mon Sep 17 00:00:00 2001
From: MerryMage <MerryMage@users.noreply.github.com>
Date: Fri, 26 Jan 2018 01:51:04 +0000
Subject: [PATCH] reg_alloc: Use std::exchange

---
 src/backend_x64/reg_alloc.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/backend_x64/reg_alloc.cpp b/src/backend_x64/reg_alloc.cpp
index b9e492b2..86c9dbf8 100644
--- a/src/backend_x64/reg_alloc.cpp
+++ b/src/backend_x64/reg_alloc.cpp
@@ -6,6 +6,7 @@
 
 #include <algorithm>
 #include <numeric>
+#include <utility>
 
 #include <xbyak.h>
 
@@ -487,8 +488,7 @@ void RegAlloc::Move(HostLoc to, HostLoc from) {
 
     EmitMove(to, from);
 
-    LocInfo(to) = LocInfo(from);
-    LocInfo(from) = {};
+    LocInfo(to) = std::exchange(LocInfo(from), {});
 }
 
 void RegAlloc::CopyToScratch(HostLoc to, HostLoc from) {