eliminate InvalidateLabel and LabelIDList from MMI and replace
them with a counter.

llvm-svn: 98462
diff --git a/llvm/lib/CodeGen/MachineModuleInfo.cpp b/llvm/lib/CodeGen/MachineModuleInfo.cpp
index 27c1387..42c6a7f 100644
--- a/llvm/lib/CodeGen/MachineModuleInfo.cpp
+++ b/llvm/lib/CodeGen/MachineModuleInfo.cpp
@@ -41,8 +41,8 @@
 
 MachineModuleInfo::MachineModuleInfo(const MCAsmInfo &MAI)
 : ImmutablePass(&ID), Context(MAI),
-  ObjFileMMI(0), CurCallSite(0), CallsEHReturn(0), CallsUnwindInit(0),
-  DbgInfoAvailable(false) {
+  ObjFileMMI(0), NextLabelIDToReturn(1), 
+  CurCallSite(0), CallsEHReturn(0), CallsUnwindInit(0), DbgInfoAvailable(false){
   // Always emit some info, by default "no personality" info.
   Personalities.push_back(NULL);
 }