From 537d9c3aa684b3ef7e8fcbeb8139af6038cd0eaf Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu@google.com>
Date: Thu, 28 Jan 2021 22:21:16 -0800
Subject: [PATCH] [MustExecute] Use ListSeparator (NFC)

---
 lib/Analysis/MustExecute.cpp | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/lib/Analysis/MustExecute.cpp b/lib/Analysis/MustExecute.cpp
index 1e7626013ee..5ca72f5f362 100644
--- a/lib/Analysis/MustExecute.cpp
+++ b/lib/Analysis/MustExecute.cpp
@@ -8,6 +8,7 @@
 
 #include "llvm/Analysis/MustExecute.h"
 #include "llvm/ADT/PostOrderIterator.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/Analysis/CFG.h"
 #include "llvm/Analysis/InstructionSimplify.h"
 #include "llvm/Analysis/LoopInfo.h"
@@ -451,13 +452,9 @@ public:
     else
       OS << " ; (mustexec in: ";
 
-    bool first = true;
-    for (const Loop *L : Loops) {
-      if (!first)
-        OS << ", ";
-      first = false;
-      OS << L->getHeader()->getName();
-    }
+    ListSeparator LS;
+    for (const Loop *L : Loops)
+      OS << LS << L->getHeader()->getName();
     OS << ")";
   }
 };