emitIAS for push -- simplify push since it's not used for args passing anymore

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 365 matching lines @@
   }
   void _psll(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Psll::create(Func, Dest, Src0));
   }
   void _psra(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Psra::create(Func, Dest, Src0));
   }
   void _psub(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Psub::create(Func, Dest, Src0));
   }
-  void _push(Operand *Src0, bool SuppressStackAdjustment = false) {
-    Context.insert(InstX8632Push::create(Func, Src0, SuppressStackAdjustment));
+  void _push(Variable *Src0) {
+    Context.insert(InstX8632Push::create(Func, Src0));
   }
   void _pxor(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Pxor::create(Func, Dest, Src0));
   }
   void _ret(Variable *Src0 = NULL) {
     Context.insert(InstX8632Ret::create(Func, Src0));
   }
   void _rol(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Rol::create(Func, Dest, Src0));
   }
@@ skipping 102 matching lines @@
 };
 
 template <> void ConstantInteger32::emit(GlobalContext *Ctx) const;
 template <> void ConstantInteger64::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