From 73996c5cb87e986913e5131f2efed69de3caf1c4 Mon Sep 17 00:00:00 2001
From: Mehdi Amini <mehdi.amini@apple.com>
Date: Tue, 6 Jan 2015 20:05:02 +0000
Subject: [PATCH] Use a Factory Method for MachineFunctionInfo Creation

The goal is to allows MachineFunctionInfo to override this create
function to customize the creation.
No change intended in existing backend in this patch.

llvm-svn: 225292
---
 llvm/include/llvm/CodeGen/MachineFunction.h | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/llvm/include/llvm/CodeGen/MachineFunction.h b/llvm/include/llvm/CodeGen/MachineFunction.h
index 3271410..4e9ff9e 100644
--- a/llvm/include/llvm/CodeGen/MachineFunction.h
+++ b/llvm/include/llvm/CodeGen/MachineFunction.h
@@ -72,6 +72,15 @@ private:
 /// MachineFunction is destroyed.
 struct MachineFunctionInfo {
   virtual ~MachineFunctionInfo();
+
+  /// \brief Factory function: default behavior is to call new using the
+  /// supplied allocator.
+  ///
+  /// This function can be overridden in a derive class.
+  template<typename Ty>
+  static Ty *create(BumpPtrAllocator &Allocator, MachineFunction &MF) {
+    return new (Allocator.Allocate<Ty>()) Ty(MF);
+  }
 };
 
 class MachineFunction {
@@ -239,7 +248,7 @@ public:
   template<typename Ty>
   Ty *getInfo() {
     if (!MFInfo)
-      MFInfo = new (Allocator.Allocate<Ty>()) Ty(*this);
+      MFInfo = Ty::template create<Ty>(Allocator, *this);
     return static_cast<Ty*>(MFInfo);
   }
 
-- 
2.7.4