[CodeGen] Pass objects that are expensive to copy by const ref.

No functionality change. Found by clang-tidy's
performance-unnecessary-value-param.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@287894 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 5 deletions

diff --git a/lib/CodeGen/CGLoopInfo.h b/lib/CodeGen/CGLoopInfo.h
index e2c9770531..15608c105d 100644
--- a/lib/CodeGen/CGLoopInfo.h
+++ b/lib/CodeGen/CGLoopInfo.h
@@ -67,7 +67,7 @@ class LoopInfo {
 public:
   /// \brief Construct a new LoopInfo for the loop with entry Header.
   LoopInfo(llvm::BasicBlock *Header, const LoopAttributes &Attrs,
-           llvm::DebugLoc StartLoc, llvm::DebugLoc EndLoc);
+           const llvm::DebugLoc &StartLoc, const llvm::DebugLoc &EndLoc);
 
   /// \brief Get the loop id metadata for this loop.
   llvm::MDNode *getLoopID() const { return LoopID; }
@@ -99,14 +99,14 @@ public:
 
   /// \brief Begin a new structured loop. The set of staged attributes will be
   /// applied to the loop and then cleared.
-  void push(llvm::BasicBlock *Header, llvm::DebugLoc StartLoc,
-            llvm::DebugLoc EndLoc);
+  void push(llvm::BasicBlock *Header, const llvm::DebugLoc &StartLoc,
+            const llvm::DebugLoc &EndLoc);
 
   /// \brief Begin a new structured loop. Stage attributes from the Attrs list.
   /// The staged attributes are applied to the loop and then cleared.
   void push(llvm::BasicBlock *Header, clang::ASTContext &Ctx,
-            llvm::ArrayRef<const Attr *> Attrs, llvm::DebugLoc StartLoc,
-            llvm::DebugLoc EndLoc);
+            llvm::ArrayRef<const Attr *> Attrs, const llvm::DebugLoc &StartLoc,
+            const llvm::DebugLoc &EndLoc);
 
   /// \brief End the current loop.
   void pop();