Sink codegen optimization level into MCCodeGenInfo along side relocation model
and code model. This eliminates the need to pass OptLevel flag all over the
place and makes it possible for any codegen pass to use this information.

llvm-svn: 144788
diff --git a/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp b/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp
index 054c750..35591e1 100644
--- a/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp
+++ b/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp
@@ -19,9 +19,8 @@
 
 char MachineFunctionAnalysis::ID = 0;
 
-MachineFunctionAnalysis::MachineFunctionAnalysis(const TargetMachine &tm,
-                                                 CodeGenOpt::Level OL) :
-  FunctionPass(ID), TM(tm), OptLevel(OL), MF(0) {
+MachineFunctionAnalysis::MachineFunctionAnalysis(const TargetMachine &tm) :
+  FunctionPass(ID), TM(tm), MF(0) {
   initializeMachineModuleInfoPass(*PassRegistry::getPassRegistry());
 }