src/llvm/lib/Object/RecordStreamer.h

   1 //===-- RecordStreamer.h - Record asm defined and used symbols ---*- 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 #ifndef LLVM_LIB_OBJECT_RECORDSTREAMER_H
  11 #define LLVM_LIB_OBJECT_RECORDSTREAMER_H
  12
  13 #include "llvm/MC/MCStreamer.h"
  14
  15 namespace llvm {
  16 class RecordStreamer : public MCStreamer {
  17 public:
  18   enum State { NeverSeen, Global, Defined, DefinedGlobal, Used };
  19
  20 private:
  21   StringMap<State> Symbols;
  22   void markDefined(const MCSymbol &Symbol);
  23   void markGlobal(const MCSymbol &Symbol);
  24   void markUsed(const MCSymbol &Symbol);
  25   void visitUsedSymbol(const MCSymbol &Sym) override;
  26
  27 public:
  28   typedef StringMap<State>::const_iterator const_iterator;
  29   const_iterator begin();
  30   const_iterator end();
  31   RecordStreamer(MCContext &Context);
  32   void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
  33   void EmitLabel(MCSymbol *Symbol) override;
  34   void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) override;
  35   bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
  36   void EmitZerofill(const MCSection *Section, MCSymbol *Symbol, uint64_t Size,
  37                     unsigned ByteAlignment) override;
  38   void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
  39                         unsigned ByteAlignment) override;
  40 };
  41 }
  42 #endif