From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Fri, 7 May 2021 13:48:10 +0000 (+0100)
Subject: [CodeGen] Ensure UserValue::getDebugLoc() and UserLabel::getDebugLoc() consistently... 
X-Git-Tag: llvmorg-14-init~7329
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c9d4b4173b56c5a56d32d07be660f872b9746f87;p=platform%2Fupstream%2Fllvm.git

[CodeGen] Ensure UserValue::getDebugLoc() and UserLabel::getDebugLoc() consistently return a const reference NFCI.

Avoids a lot of unnecessary tracking increments/decrements of the underlying TrackingMDNodeRef.
---

diff --git a/llvm/lib/CodeGen/LiveDebugVariables.cpp b/llvm/lib/CodeGen/LiveDebugVariables.cpp
index ce898cd..100dacb 100644
--- a/llvm/lib/CodeGen/LiveDebugVariables.cpp
+++ b/llvm/lib/CodeGen/LiveDebugVariables.cpp
@@ -473,7 +473,7 @@ public:
                        BlockSkipInstsMap &BBSkipInstsMap);
 
   /// Return DebugLoc of this UserValue.
-  DebugLoc getDebugLoc() { return dl;}
+  const DebugLoc &getDebugLoc() { return dl; }
 
   void print(raw_ostream &, const TargetRegisterInfo *);
 };
@@ -506,7 +506,7 @@ public:
                       BlockSkipInstsMap &BBSkipInstsMap);
 
   /// Return DebugLoc of this UserLabel.
-  DebugLoc getDebugLoc() { return dl; }
+  const DebugLoc &getDebugLoc() { return dl; }
 
   void print(raw_ostream &, const TargetRegisterInfo *);
 };