Unify alloca, outgoing arg, and prolog construction

src/IceTargetLoweringX8664Traits.h

 //===- subzero/src/IceTargetLoweringX8664Traits.h - x86-64 traits -*- C++ -*-=//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 714 matching lines @@
     void dump(const Cfg *Func, Ostream &Str) const override;
 
     static bool classof(const Operand *Operand) {
       return Operand->getKind() == static_cast<OperandKind>(kMem);
     }
 
     void setRandomized(bool R) { Randomized = R; }
 
     bool getRandomized() const { return Randomized; }
 
-    void setIgnoreStackAdjust(bool Ignore) { IgnoreStackAdjust = Ignore; }
-    bool getIgnoreStackAdjust() const { return IgnoreStackAdjust; }
-
   private:
     X86OperandMem(Cfg *Func, Type Ty, Variable *Base, Constant *Offset,
                   Variable *Index, uint16_t Shift);
 
     Variable *Base;
     Constant *Offset;
     Variable *Index;
     uint16_t Shift;
     /// A flag to show if this memory operand is a randomized one. Randomized
     /// memory operands are generated in
     /// TargetX86Base::randomizeOrPoolImmediate()
     bool Randomized = false;
-    /// Memory operations involving the stack pointer need to know when the
-    /// stack pointer was moved temporarily.  Ignore that adjustment in
-    /// cases that should be pinned to the stack pointer, such as outgoing
-    /// arguments to calls.
-    bool IgnoreStackAdjust = false;
   };
 
   /// VariableSplit is a way to treat an f64 memory location as a pair of i32
   /// locations (Low and High). This is needed for some cases of the Bitcast
   /// instruction. Since it's not possible for integer registers to access the
   /// XMM registers and vice versa, the lowering forces the f64 to be spilled to
   /// the stack and then accesses through the VariableSplit.
   // TODO(jpp): remove references to VariableSplit from IceInstX86Base as 64bit
   // targets can natively handle these.
   class VariableSplit : public X86Operand {
@@ skipping 83 matching lines @@
 
 } // end of namespace X86Internal
 
 namespace X8664 {
 using Traits = ::Ice::X86Internal::MachineTraits<TargetX8664>;
 } // end of namespace X8664
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGX8664TRAITS_H