MCSection.h revision eb40a0fd98c44ecc6360e7fab33cf9e9911bed4f
1//===- MCSection.h - Machine Code Sections ----------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file declares the MCSection class. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_MC_MCSECTION_H 15#define LLVM_MC_MCSECTION_H 16 17#include <string> 18#include "llvm/ADT/StringRef.h" 19#include "llvm/MC/SectionKind.h" 20 21namespace llvm { 22 class MCContext; 23 class MCAsmInfo; 24 class raw_ostream; 25 26 /// MCSection - Instances of this class represent a uniqued identifier for a 27 /// section in the current translation unit. The MCContext class uniques and 28 /// creates these. 29 class MCSection { 30 MCSection(const MCSection&); // DO NOT IMPLEMENT 31 void operator=(const MCSection&); // DO NOT IMPLEMENT 32 protected: 33 MCSection(SectionKind K) : Kind(K) {} 34 SectionKind Kind; 35 public: 36 virtual ~MCSection(); 37 38 SectionKind getKind() const { return Kind; } 39 40 virtual void PrintSwitchToSection(const MCAsmInfo &MAI, 41 raw_ostream &OS) const = 0; 42 43 /// isBaseAddressKnownZero - Return true if we know that this section will 44 /// get a base address of zero. In cases where we know that this is true we 45 /// can emit section offsets as direct references to avoid a subtraction 46 /// from the base of the section, saving a relocation. 47 virtual bool isBaseAddressKnownZero() const { 48 return false; 49 } 50 }; 51 52} // end namespace llvm 53 54#endif 55