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The linker will call `lto_codegen_add_must_preserve_symbol' on all globals that should be kept around. The linker will pretend that a dylib is being created. <rdar://problem/12528059> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169770 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
//===-LTOCodeGenerator.h - LLVM Link Time Optimizer -----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the LTOCodeGenerator class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LTO_CODE_GENERATOR_H
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#define LTO_CODE_GENERATOR_H
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#include "llvm-c/lto.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/Linker.h"
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#include <string>
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namespace llvm {
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class LLVMContext;
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class GlobalValue;
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class Mangler;
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class MemoryBuffer;
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class TargetMachine;
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class raw_ostream;
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}
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//===----------------------------------------------------------------------===//
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/// LTOCodeGenerator - C++ class which implements the opaque lto_code_gen_t
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/// type.
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///
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struct LTOCodeGenerator {
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static const char *getVersionString();
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LTOCodeGenerator();
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~LTOCodeGenerator();
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bool addModule(struct LTOModule*, std::string &errMsg);
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bool setDebugInfo(lto_debug_model, std::string &errMsg);
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bool setCodePICModel(lto_codegen_model, std::string &errMsg);
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void setCpu(const char* mCpu) { _mCpu = mCpu; }
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void addMustPreserveSymbol(const char* sym) {
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_mustPreserveSymbols[sym] = 1;
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}
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bool writeMergedModules(const char *path, std::string &errMsg);
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bool compile_to_file(const char **name, std::string &errMsg);
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const void *compile(size_t *length, std::string &errMsg);
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void setCodeGenDebugOptions(const char *opts);
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private:
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bool generateObjectFile(llvm::raw_ostream &out, std::string &errMsg);
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void applyScopeRestrictions();
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void applyRestriction(llvm::GlobalValue &GV,
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std::vector<const char*> &mustPreserveList,
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llvm::SmallPtrSet<llvm::GlobalValue*, 8> &asmUsed,
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llvm::Mangler &mangler);
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bool determineTarget(std::string &errMsg);
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typedef llvm::StringMap<uint8_t> StringSet;
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llvm::LLVMContext& _context;
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llvm::Linker _linker;
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llvm::TargetMachine* _target;
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bool _emitDwarfDebugInfo;
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bool _scopeRestrictionsDone;
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lto_codegen_model _codeModel;
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StringSet _mustPreserveSymbols;
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StringSet _asmUndefinedRefs;
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llvm::MemoryBuffer* _nativeObjectFile;
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std::vector<char*> _codegenOptions;
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std::string _mCpu;
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std::string _nativeObjectPath;
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};
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#endif // LTO_CODE_GENERATOR_H
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