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
43