Subzero: Use scalar arithmetic when no vector instruction exists.

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 104 matching lines @@
                       Operand *Val);
   void lowerCountZeros(bool Cttz, Type Ty, Variable *Dest, Operand *FirstVal,
                        Operand *SecondVal);
 
   typedef void (TargetX8632::*LowerBinOp)(Variable *, Operand *);
   void expandAtomicRMWAsCmpxchg(LowerBinOp op_lo, LowerBinOp op_hi,
                                 Variable *Dest, Operand *Ptr, Operand *Val);
 
   void eliminateNextVectorSextInstruction(Variable *SignExtendedResult);
 
+  void scalarizeArithmetic(InstArithmetic::OpKind K, Variable *Dest,
+                           Operand *Src0, Operand *Src1);
+
   // Operand legalization helpers.  To deal with address mode
   // constraints, the helpers will create a new Operand and emit
   // instructions that guarantee that the Operand kind is one of those
   // indicated by the LegalMask (a bitmask of allowed kinds).  If the
   // input Operand is known to already meet the constraints, it may be
   // simply returned as the result, without creating any new
   // instructions or operands.
   enum OperandLegalization {
     Legal_None = 0,
     Legal_Reg = 1 << 0, // physical register, not stack location
@@ skipping 78 matching lines @@
   }
   void _bsf(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Bsf::create(Func, Dest, Src0));
   }
   void _bsr(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Bsr::create(Func, Dest, Src0));
   }
   void _bswap(Variable *SrcDest) {
     Context.insert(InstX8632Bswap::create(Func, SrcDest));
   }
-  void _cdq(Variable *Dest, Operand *Src0) {
-    Context.insert(InstX8632Cdq::create(Func, Dest, Src0));
+  void _cbwdq(Variable *Dest, Operand *Src0) {
+    Context.insert(InstX8632Cbwdq::create(Func, Dest, Src0));
   }
   void _cmov(Variable *Dest, Operand *Src0, InstX8632::BrCond Condition) {
     Context.insert(InstX8632Cmov::create(Func, Dest, Src0, Condition));
   }
   void _cmp(Operand *Src0, Operand *Src1) {
     Context.insert(InstX8632Icmp::create(Func, Src0, Src1));
   }
   void _cmpps(Variable *Dest, Operand *Src0,
               InstX8632Cmpps::CmppsCond Condition) {
     Context.insert(InstX8632Cmpps::create(Func, Dest, Src0, Condition));
@@ skipping 248 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