Subzero: Add basic ELFObjectWriter (text section, symtab, strtab, headers)

src/IceTargetLowering.h

 //===- subzero/src/IceTargetLowering.h - Lowering interface -----*- 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 TargetLowering and LoweringContext
 // classes.  TargetLowering is an abstract class used to drive the
 // translation/lowering process.  LoweringContext maintains a
 // context for lowering each instruction, offering conveniences such
 // as iterating over non-deleted instructions.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICETARGETLOWERING_H
 #define SUBZERO_SRC_ICETARGETLOWERING_H
 
 #include "IceDefs.h"
 #include "IceInst.h" // for the names of the Inst subtypes
 #include "IceTypes.h"
 
 namespace Ice {
 
-typedef uint8_t AsmCodeByte;
-
 class Assembler;
 
 // LoweringContext makes it easy to iterate through non-deleted
 // instructions in a node, and insert new (lowered) instructions at
 // the current point.  Along with the instruction list container and
 // associated iterators, it holds the current node, which is needed
 // when inserting new instructions in order to track whether variables
 // are used as single-block or multi-block.
 class LoweringContext {
   LoweringContext(const LoweringContext &) = delete;
@@ skipping 119 matching lines @@
   // scratch registers as killed by a call.  If a Type is not
   // provided, a target-specific default type is used.
   virtual Variable *getPhysicalRegister(SizeT RegNum,
                                         Type Ty = IceType_void) = 0;
   // Returns a printable name for the register.
   virtual IceString getRegName(SizeT RegNum, Type Ty) const = 0;
 
   virtual bool hasFramePointer() const { return false; }
   virtual SizeT getFrameOrStackReg() const = 0;
   virtual size_t typeWidthInBytesOnStack(Type Ty) const = 0;
-  virtual SizeT getBundleAlignLog2Bytes() const = 0;
-  virtual llvm::ArrayRef<AsmCodeByte> getNonExecBundlePadding() const = 0;
   bool hasComputedFrame() const { return HasComputedFrame; }
   bool shouldDoNopInsertion() const;
   // Returns true if this function calls a function that has the
   // "returns twice" attribute.
   bool callsReturnsTwice() const { return CallsReturnsTwice; }
   void setCallsReturnsTwice(bool RetTwice) {
     CallsReturnsTwice = RetTwice;
   }
   int32_t getStackAdjustment() const { return StackAdjustment; }
   void updateStackAdjustment(int32_t Offset) { StackAdjustment += Offset; }
@@ skipping 83 matching lines @@
   virtual void lower(const VariableDeclaration &Var) = 0;
 
 protected:
   TargetGlobalInitLowering(GlobalContext *Ctx) : Ctx(Ctx) {}
   GlobalContext *Ctx;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERING_H