Add support for passing and returning vectors in accordance with the x86 calling convention.

src/IceInstX8632.h

 //===- subzero/src/IceInstX8632.h - Low-level x86 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 153 matching lines @@
     Push,
     Pxor,
     Ret,
     Sar,
     Sbb,
     Shl,
     Shld,
     Shr,
     Shrd,
     Store,
+    Storep,
     StoreQ,
     Sub,
     Subss,
     Test,
     Ucomiss,
     UD2,
     Xadd,
     Xor
   };
   static const char *getWidthString(Type Ty);
@@ skipping 431 matching lines @@
   virtual void dump(const Cfg *Func) const;
   static bool classof(const Inst *Inst) { return isClassof(Inst, Store); }
 
 private:
   InstX8632Store(Cfg *Func, Operand *Value, OperandX8632 *Mem);
   InstX8632Store(const InstX8632Store &) LLVM_DELETED_FUNCTION;
   InstX8632Store &operator=(const InstX8632Store &) LLVM_DELETED_FUNCTION;
   virtual ~InstX8632Store() {}
 };
 
+// Store packed - wrapper for storing vectors
+class InstX8632Storep : public InstX8632 {
+public:
+  static InstX8632Storep *create(Cfg *Func, Operand *Value, OperandX8632 *Mem) {
+    return new (Func->allocate<InstX8632Storep>())
+        InstX8632Storep(Func, Value, Mem);
+  }
+  virtual void emit(const Cfg *Func) const;
+  virtual void dump(const Cfg *Func) const;
+  static bool classof(const Inst *Inst) { return isClassof(Inst, Storep); }
+
+private:
+  InstX8632Storep(Cfg *Func, Operand *Value, OperandX8632 *Mem);
+  InstX8632Storep(const InstX8632Storep &) LLVM_DELETED_FUNCTION;
+  InstX8632Storep &operator=(const InstX8632Storep &) LLVM_DELETED_FUNCTION;
+  virtual ~InstX8632Storep() {}
+};
+
 // Move/assignment instruction - wrapper for mov/movss/movsd.
 class InstX8632Mov : public InstX8632 {
 public:
   static InstX8632Mov *create(Cfg *Func, Variable *Dest, Operand *Source) {
     return new (Func->allocate<InstX8632Mov>())
         InstX8632Mov(Func, Dest, Source);
   }
   virtual bool isRedundantAssign() const;
   virtual void emit(const Cfg *Func) const;
   virtual void dump(const Cfg *Func) const;
@@ skipping 215 matching lines @@
 
   InstX8632Xadd(Cfg *Func, Operand *Dest, Variable *Source, bool Locked);
   InstX8632Xadd(const InstX8632Xadd &) LLVM_DELETED_FUNCTION;
   InstX8632Xadd &operator=(const InstX8632Xadd &) LLVM_DELETED_FUNCTION;
   virtual ~InstX8632Xadd() {}
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEINSTX8632_H