Subzero: Use cmov to improve lowering for the select instruction.

src/IceInstX8632.h

 //===- subzero/src/IceInstX8632.h - x86-32 machine instructions -*- 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 InstX8632 and OperandX8632 classes and
@@ skipping 247 matching lines @@
     Test,
     Ucomiss,
     UD2,
     Xadd,
     Xchg,
     Xor
   };
 
   static const char *getWidthString(Type Ty);
   static const char *getFldString(Type Ty);
+  static CondX86::BrCond getOppositeCondition(CondX86::BrCond Cond);
   void dump(const Cfg *Func) const override;
 
 protected:
   InstX8632(Cfg *Func, InstKindX8632 Kind, SizeT Maxsrcs, Variable *Dest)
       : InstTarget(Func, static_cast<InstKind>(Kind), Maxsrcs, Dest) {}
   ~InstX8632() override {}
   static bool isClassof(const Inst *Inst, InstKindX8632 MyKind) {
     return Inst->getKind() == static_cast<InstKind>(MyKind);
   }
   // Most instructions that operate on vector arguments require vector
@@ skipping 1424 matching lines @@
 template <> void InstX8632Pinsr::emitIAS(const Cfg *Func) const;
 template <> void InstX8632Movsx::emitIAS(const Cfg *Func) const;
 template <> void InstX8632Movzx::emitIAS(const Cfg *Func) const;
 template <> void InstX8632Pmull::emitIAS(const Cfg *Func) const;
 template <> void InstX8632Pshufd::emitIAS(const Cfg *Func) const;
 template <> void InstX8632Shufps::emitIAS(const Cfg *Func) const;
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEINSTX8632_H