Use movss to implement insertelement when elements = 4 and index = 0.

src/IceInstX8632.cpp

 //===- subzero/src/IceInstX8632.cpp - X86-32 instruction implementation ---===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the InstX8632 and OperandX8632 classes,
@@ skipping 444 matching lines @@
 
 
 // In-place ops
 template <> const char *InstX8632Bswap::Opcode = "bswap";
 template <> const char *InstX8632Neg::Opcode = "neg";
 // Unary ops
 template <> const char *InstX8632Bsf::Opcode = "bsf";
 template <> const char *InstX8632Bsr::Opcode = "bsr";
 template <> const char *InstX8632Lea::Opcode = "lea";
 template <> const char *InstX8632Movd::Opcode = "movd";
-template <> const char *InstX8632Movss::Opcode = "movss";
 template <> const char *InstX8632Sqrtss::Opcode = "sqrtss";
 // Binary ops
 template <> const char *InstX8632Add::Opcode = "add";
 template <> const char *InstX8632Addps::Opcode = "addps";
 template <> const char *InstX8632Adc::Opcode = "adc";
 template <> const char *InstX8632Addss::Opcode = "addss";
 template <> const char *InstX8632Padd::Opcode = "padd";
 template <> const char *InstX8632Sub::Opcode = "sub";
 template <> const char *InstX8632Subps::Opcode = "subps";
 template <> const char *InstX8632Subss::Opcode = "subss";
@@ skipping 16 matching lines @@
 template <> const char *InstX8632Idiv::Opcode = "idiv";
 template <> const char *InstX8632Divss::Opcode = "divss";
 template <> const char *InstX8632Rol::Opcode = "rol";
 template <> const char *InstX8632Shl::Opcode = "shl";
 template <> const char *InstX8632Psll::Opcode = "psll";
 template <> const char *InstX8632Shr::Opcode = "shr";
 template <> const char *InstX8632Sar::Opcode = "sar";
 template <> const char *InstX8632Psra::Opcode = "psra";
 template <> const char *InstX8632Pcmpeq::Opcode = "pcmpeq";
 template <> const char *InstX8632Pcmpgt::Opcode = "pcmpgt";
+template <> const char *InstX8632Movss::Opcode = "movss";
 // Ternary ops
 template <> const char *InstX8632Shufps::Opcode = "shufps";
 template <> const char *InstX8632Pinsrw::Opcode = "pinsrw";
 // Three address ops
 template <> const char *InstX8632Pextrw::Opcode = "pextrw";
 template <> const char *InstX8632Pshufd::Opcode = "pshufd";
 
 template <> void InstX8632Sqrtss::emit(const Cfg *Func) const {
   Ostream &Str = Func->getContext()->getStrEmit();
   assert(getSrcSize() == 1);
@@ skipping 896 matching lines @@
   default:
     Str << "???";
     break;
   }
   Str << "(";
   Var->dump(Func);
   Str << ")";
 }
 
 } // end of namespace Ice