[llvm] r225292 - Use a Factory Method for MachineFunctionInfo Creation

[Mehdi Amini]

Author: mehdi_amini
Date: Tue Jan  6 14:05:02 2015
New Revision: 225292

URL: http://llvm.org/viewvc/llvm-project?rev=225292&view=rev
Log:
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.


Modified:
    llvm/trunk/include/llvm/CodeGen/MachineFunction.h

Modified: llvm/trunk/include/llvm/CodeGen/MachineFunction.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/CodeGen/MachineFunction.h?rev=225292&r1=225291&r2=225292&view=diff
==============================================================================
--- llvm/trunk/include/llvm/CodeGen/MachineFunction.h (original)
+++ llvm/trunk/include/llvm/CodeGen/MachineFunction.h Tue Jan  6 14:05:02 2015
@@ -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);
   }