Subzero: Add branch optimization.

src/IceTargetLoweringX8632.h

 //===- subzero/src/IceTargetLoweringX8632.h - x86-32 lowering ---*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares the TargetLoweringX8632 class, which
@@ skipping 10 matching lines @@
 #include "IceInstX8632.h"
 
 namespace Ice {
 
 class TargetX8632 : public TargetLowering {
 public:
   static TargetX8632 *create(Cfg *Func) { return new TargetX8632(Func); }
 
   virtual void translateOm1();
   virtual void translateO2();
+  virtual bool doBranchOpt(Inst *I, const CfgNode *NextNode);
 
   virtual Variable *getPhysicalRegister(SizeT RegNum);
   virtual IceString getRegName(SizeT RegNum, Type Ty) const;
   virtual llvm::SmallBitVector getRegisterSet(RegSetMask Include,
                                               RegSetMask Exclude) const;
   virtual const llvm::SmallBitVector &getRegisterSetForType(Type Ty) const {
     return TypeToRegisterSet[Ty];
   }
   virtual bool hasFramePointer() const { return IsEbpBasedFrame; }
   virtual SizeT getFrameOrStackReg() const {
@@ skipping 469 matching lines @@
 };
 
 template <> void ConstantInteger32::emit(GlobalContext *Ctx) const;
 template <> void ConstantInteger64::emit(GlobalContext *Ctx) const;
 template <> void ConstantFloat::emit(GlobalContext *Ctx) const;
 template <> void ConstantDouble::emit(GlobalContext *Ctx) const;
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGX8632_H