1 //===-- llvm/CodeGen/GCMetadataPrinter.h - Prints asm GC tables -*- 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 // The abstract base class GCMetadataPrinter supports writing GC metadata tables 11 // as assembly code. This is a separate class from GCStrategy in order to allow 12 // users of the LLVM JIT to avoid linking with the AsmWriter. 13 // 14 // Subclasses of GCMetadataPrinter must be registered using the 15 // GCMetadataPrinterRegistry. This is separate from the GCStrategy itself 16 // because these subclasses are logically plugins for the AsmWriter. 17 // 18 //===----------------------------------------------------------------------===// 19 20 #ifndef LLVM_CODEGEN_GCMETADATAPRINTER_H 21 #define LLVM_CODEGEN_GCMETADATAPRINTER_H 22 23 #include "llvm/CodeGen/GCMetadata.h" 24 #include "llvm/CodeGen/GCStrategy.h" 25 #include "llvm/Support/Registry.h" 26 27 namespace llvm { 28 29 class GCMetadataPrinter; 30 31 /// GCMetadataPrinterRegistry - The GC assembly printer registry uses all the 32 /// defaults from Registry. 33 typedef Registry<GCMetadataPrinter> GCMetadataPrinterRegistry; 34 35 /// GCMetadataPrinter - Emits GC metadata as assembly code. 36 /// 37 class GCMetadataPrinter { 38 public: 39 typedef GCStrategy::list_type list_type; 40 typedef GCStrategy::iterator iterator; 41 42 private: 43 GCStrategy *S; 44 45 friend class AsmPrinter; 46 47 protected: 48 // May only be subclassed. 49 GCMetadataPrinter(); 50 51 // Do not implement. 52 GCMetadataPrinter(const GCMetadataPrinter &); 53 GCMetadataPrinter &operator=(const GCMetadataPrinter &); 54 55 public: 56 GCStrategy &getStrategy() { return *S; } 57 const Module &getModule() const { return S->getModule(); } 58 59 /// begin/end - Iterate over the collected function metadata. 60 iterator begin() { return S->begin(); } 61 iterator end() { return S->end(); } 62 63 /// beginAssembly/finishAssembly - Emit module metadata as assembly code. 64 virtual void beginAssembly(AsmPrinter &AP); 65 66 virtual void finishAssembly(AsmPrinter &AP); 67 68 virtual ~GCMetadataPrinter(); 69 }; 70 71 } 72 73 #endif 74
