From 656838bb7178d51544ff85e9b925e2b43433a6df Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Thu, 13 May 2021 13:19:13 +0100
Subject: [PATCH] [X86] VZeroUpperInserter::insertVZeroUpper - avoid DebugLoc
 creation by embedding in the BuildMI calls. NFCI.

Try to pass DebugLoc by const-ref to avoid costly TrackingMDNodeRef copies.
---
 lib/Target/X86/X86VZeroUpper.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/Target/X86/X86VZeroUpper.cpp b/lib/Target/X86/X86VZeroUpper.cpp
index c188c744362..c3031b69855 100644
--- a/lib/Target/X86/X86VZeroUpper.cpp
+++ b/lib/Target/X86/X86VZeroUpper.cpp
@@ -182,8 +182,7 @@ static bool callHasRegMask(MachineInstr &MI) {
 /// Insert a vzeroupper instruction before I.
 void VZeroUpperInserter::insertVZeroUpper(MachineBasicBlock::iterator I,
                                           MachineBasicBlock &MBB) {
-  DebugLoc dl = I->getDebugLoc();
-  BuildMI(MBB, I, dl, TII->get(X86::VZEROUPPER));
+  BuildMI(MBB, I, I->getDebugLoc(), TII->get(X86::VZEROUPPER));
   ++NumVZU;
   EverMadeChange = true;
 }