Use three-address form of imul

src/IceTargetLoweringX86Base.h

 //===- subzero/src/IceTargetLoweringX86Base.h - x86 lowering ----*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 410 matching lines @@
   template <typename T = Traits>
   typename std::enable_if<!T::UsesX87, void>::type _fstp(Variable *) {
     llvm::report_fatal_error("fstp is not available in x86-64");
   }
   void _idiv(Variable *Dest, Operand *Src0, Operand *Src1) {
     Context.insert(Traits::Insts::Idiv::create(Func, Dest, Src0, Src1));
   }
   void _imul(Variable *Dest, Operand *Src0) {
     Context.insert(Traits::Insts::Imul::create(Func, Dest, Src0));
   }
+  void _imul_imm(Variable *Dest, Operand *Src0, Constant *Imm) {
+    Context.insert(Traits::Insts::ImulImm::create(Func, Dest, Src0, Imm));
+  }
   void _insertps(Variable *Dest, Operand *Src0, Operand *Src1) {
     Context.insert(Traits::Insts::Insertps::create(Func, Dest, Src0, Src1));
   }
   void _jmp(Operand *Target) {
     Context.insert(Traits::Insts::Jmp::create(Func, Target));
   }
   void _lea(Variable *Dest, Operand *Src0) {
     Context.insert(Traits::Insts::Lea::create(Func, Dest, Src0));
   }
   void _mfence() { Context.insert(Traits::Insts::Mfence::create(Func)); }
@@ skipping 278 matching lines @@
                     Operand *Src1Lo, Variable *DestLo, Variable *DestHi);
 
   BoolFolding FoldingInfo;
 };
 } // end of namespace X86Internal
 } // end of namespace Ice
 
 #include "IceTargetLoweringX86BaseImpl.h"
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGX86BASE_H