Introduce SpecificBumpPtrAllocator, a wrapper for BumpPtrAllocator which allows
only a single type of object to be allocated. Use it to make VNInfo destruction
typesafe.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99919 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/PreAllocSplitting.cpp b/lib/CodeGen/PreAllocSplitting.cpp
index 70e91aa..2d49beb 100644
--- a/lib/CodeGen/PreAllocSplitting.cpp
+++ b/lib/CodeGen/PreAllocSplitting.cpp
@@ -665,7 +665,7 @@
 
 /// ReconstructLiveInterval - Recompute a live interval from scratch.
 void PreAllocSplitting::ReconstructLiveInterval(LiveInterval* LI) {
-  BumpPtrAllocator& Alloc = LIs->getVNInfoAllocator();
+  VNInfo::Allocator& Alloc = LIs->getVNInfoAllocator();
   
   // Clear the old ranges and valnos;
   LI->clear();