Add scalar lowering for sqrt intrinsic.

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 234 matching lines @@
   }
   void _shld(Variable *Dest, Variable *Src0, Variable *Src1) {
     Context.insert(InstX8632Shld::create(Func, Dest, Src0, Src1));
   }
   void _shr(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Shr::create(Func, Dest, Src0));
   }
   void _shrd(Variable *Dest, Variable *Src0, Variable *Src1) {
     Context.insert(InstX8632Shrd::create(Func, Dest, Src0, Src1));
   }
+  void _sqrtss(Variable *Dest, Operand *Src0) {
+    Context.insert(InstX8632Sqrtss::create(Func, Dest, Src0));
+  }
   void _store(Operand *Value, OperandX8632 *Mem) {
     Context.insert(InstX8632Store::create(Func, Value, Mem));
   }
   void _storeq(Operand *Value, OperandX8632 *Mem) {
     Context.insert(InstX8632StoreQ::create(Func, Value, Mem));
   }
   void _sub(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Sub::create(Func, Dest, Src0));
   }
   void _subss(Variable *Dest, Operand *Src0) {
@@ skipping 56 matching lines @@
   virtual ~TargetGlobalInitX8632() {}
 };
 
 template <> void ConstantInteger::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