Subzero: Allow per-method controls.

src/IceCfg.h

 //===- subzero/src/IceCfg.h - Control flow graph ----------------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 22 matching lines @@
 public:
   ~Cfg();
 
   static std::unique_ptr<Cfg> create(GlobalContext *Ctx,
                                      uint32_t SequenceNumber) {
     return std::unique_ptr<Cfg>(new Cfg(Ctx, SequenceNumber));
   }
 
   GlobalContext *getContext() const { return Ctx; }
   uint32_t getSequenceNumber() const { return SequenceNumber; }
+  OptLevel getOptLevel() const { return OptimizationLevel; }
 
   static constexpr VerboseMask defaultVerboseMask() {
     return (IceV_NO_PER_PASS_DUMP_BEYOND << 1) - 1;
   }
   /// Returns true if any of the specified options in the verbose mask are set.
   /// If the argument is omitted, it checks if any verbose options at all are
   /// set.
   bool isVerbose(VerboseMask Mask = defaultVerboseMask()) const {
     return VMask & Mask;
   }
@@ skipping 236 matching lines @@
     BVT_StackPointer,
     BVT_FramePointer,
     BVT_UserPointer
   };
   void sortAndCombineAllocas(CfgVector<Inst *> &Allocas,
                              uint32_t CombinedAlignment, InstList &Insts,
                              AllocaBaseVariableType BaseVariableType);
   void findRematerializable();
 
   GlobalContext *Ctx;
-  uint32_t SequenceNumber;             /// output order for emission
+  uint32_t SequenceNumber; /// output order for emission
+  OptLevel OptimizationLevel = Opt_m1;
   uint32_t ConstantBlindingCookie = 0; /// cookie for constant blinding
   VerboseMask VMask;
   GlobalString FunctionName;
   Type ReturnType = IceType_void;
   bool IsInternalLinkage = false;
   bool HasError = false;
   bool FocusedTiming = false;
   std::string ErrorMessage = "";
   CfgNode *Entry = nullptr; /// entry basic block
   NodeList Nodes;           /// linearized node list; Entry should be first
@@ skipping 38 matching lines @@
   using OwnerType = Cfg;
   static StringPool *getStrings(const OwnerType *PoolOwner) {
     return PoolOwner->getVarStrings();
   }
 };
 using VariableString = StringID<VariableStringPoolTraits>;
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICECFG_H