change MCContext to work on the doInitialization/doFinalization model

reviewed by Evan Cheng <evan.cheng@apple.com>



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169456 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineModuleInfo.cpp b/lib/CodeGen/MachineModuleInfo.cpp
index 4fbbb05..c5fd4a1 100644
--- a/lib/CodeGen/MachineModuleInfo.cpp
+++ b/lib/CodeGen/MachineModuleInfo.cpp
@@ -270,6 +270,9 @@
 }
 
 bool MachineModuleInfo::doInitialization(Module &M) {
+  
+  Context.doInitialization();
+
   ObjFileMMI = 0;
   CompactUnwindEncoding = 0;
   CurCallSite = 0;
@@ -291,6 +294,8 @@
   delete AddrLabelSymbols;
   AddrLabelSymbols = 0;
 
+  Context.doFinalization();
+
   return false;
 }