Privatize the VectorType uniquing.

llvm-svn: 78125
diff --git a/llvm/lib/VMCore/LLVMContextImpl.h b/llvm/lib/VMCore/LLVMContextImpl.h
index 5e027cb..a92b571 100644
--- a/llvm/lib/VMCore/LLVMContextImpl.h
+++ b/llvm/lib/VMCore/LLVMContextImpl.h
@@ -129,6 +129,7 @@
   ConstantInt *TheFalseVal;
   
   TypeMap<ArrayValType, ArrayType> ArrayTypes;
+  TypeMap<VectorValType, VectorType> VectorTypes;
   
   LLVMContextImpl() : TheTrueVal(0), TheFalseVal(0) { }
 };