From db23f27786d9cea6f3d947d877b6b3a301e795ea Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Fri, 17 Sep 2021 13:35:59 +0100
Subject: [PATCH] [X86] X86PreTileConfig - Use const-ref iterator in for-range
 loop. NFCI.

Avoid unnecessary copies, reported by MSVC static analyzer.
---
 llvm/lib/Target/X86/X86PreTileConfig.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Target/X86/X86PreTileConfig.cpp b/llvm/lib/Target/X86/X86PreTileConfig.cpp
index b85a0b6..53aa8f9 100644
--- a/llvm/lib/Target/X86/X86PreTileConfig.cpp
+++ b/llvm/lib/Target/X86/X86PreTileConfig.cpp
@@ -323,7 +323,7 @@ bool X86PreTileConfig::runOnMachineFunction(MachineFunction &MF) {
       ST.getTileConfigSize(), ST.getTileConfigAlignment(), false);
 
   // Try to insert for the tile config live in points.
-  for (auto I : CfgNeedInsert) {
+  for (const auto &I : CfgNeedInsert) {
     SmallSet<MIRef, 8> InsertPoints;
     SmallVector<MIRef, 8> WorkList({I});
     while (!WorkList.empty()) {
-- 
2.7.4