X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FLinker.h;h=1ebcd6b53863541d6207cc8877219e7152419c2a;hb=829c8bd98db63bc57f2e6c21bfcd5464f08ef548;hp=2d0c2cd96b76473369afe8d9c8ebae30ccea257f;hpb=4434ed44c45c87a72b7a0bf2f91211f895022b91;p=oota-llvm.git diff --git a/include/llvm/Linker.h b/include/llvm/Linker.h index 2d0c2cd96b7..1ebcd6b5386 100644 --- a/include/llvm/Linker.h +++ b/include/llvm/Linker.h @@ -14,14 +14,16 @@ #ifndef LLVM_LINKER_H #define LLVM_LINKER_H -#include "llvm/System/Path.h" #include +#include #include namespace llvm { + namespace sys { class Path; } class Module; class LLVMContext; +class StringRef; /// This class provides the core functionality of linking in LLVM. It retains a /// Module object which is the composite of the modules and libraries linked @@ -32,7 +34,7 @@ class LLVMContext; /// The Linker can link Modules from memory, bitcode files, or bitcode /// archives. It retains a set of search paths in which to find any libraries /// presented to it. By default, the linker will generate error and warning -/// messages to std::cerr but this capability can be turned off with the +/// messages to stderr but this capability can be turned off with the /// QuietWarnings and QuietErrors flags. It can also be instructed to verbosely /// print out the linking actions it is taking with the Verbose flag. /// @brief The LLVM Linker. @@ -52,11 +54,16 @@ class Linker { /// This enumeration is used to control various optional features of the /// linker. enum ControlFlags { - Verbose = 1, ///< Print to std::cerr what steps the linker is taking - QuietWarnings = 2, ///< Don't print warnings to std::cerr. - QuietErrors = 4 ///< Don't print errors to std::cerr. + Verbose = 1, ///< Print to stderr what steps the linker is taking + QuietWarnings = 2, ///< Don't print warnings to stderr. + QuietErrors = 4 ///< Don't print errors to stderr. }; - + + enum LinkerMode { + DestroySource = 0, // Allow source module to be destroyed. + PreserveSource = 1 // Preserve the source module. + }; + /// @} /// @name Constructors /// @{ @@ -64,17 +71,16 @@ class Linker { /// Construct the Linker with an empty module which will be given the /// name \p progname. \p progname will also be used for error messages. /// @brief Construct with empty module - Linker( - const std::string& progname, ///< name of tool running linker - const std::string& modulename, ///< name of linker's end-result module - LLVMContext& C, ///< Context for global info - unsigned Flags = 0 ///< ControlFlags (one or more |'d together) + Linker(StringRef progname, ///< name of tool running linker + StringRef modulename, ///< name of linker's end-result module + LLVMContext &C, ///< Context for global info + unsigned Flags = 0 ///< ControlFlags (one or more |'d together) ); /// Construct the Linker with a previously defined module, \p aModule. Use /// \p progname for the name of the program in error messages. /// @brief Construct with existing module - Linker(const std::string& progname, Module* aModule, unsigned Flags = 0); + Linker(StringRef progname, Module* aModule, unsigned Flags = 0); /// Destruct the Linker. /// @brief Destructor @@ -114,9 +120,9 @@ class Linker { /// true, indicating an error occurred. At most one error is retained so /// this function always returns the last error that occurred. Note that if /// the Quiet control flag is not set, the error string will have already - /// been printed to std::cerr. + /// been printed to stderr. /// @brief Get the text of the last error that occurred. - const std::string& getLastError() const { return Error; } + const std::string &getLastError() const { return Error; } /// @} /// @name Mutators @@ -158,7 +164,6 @@ class Linker { /// @returns true if an error occurred, false otherwise /// @see LinkItemKind /// @see getLastError - /// @throws nothing bool LinkInItems ( const ItemList& Items, ///< Set of libraries/files to link in ItemList& NativeItems ///< Output list of native files/libs @@ -214,8 +219,8 @@ class Linker { /// @returns true if an error occurs, false otherwise /// @brief Link one library into the module bool LinkInLibrary ( - const std::string& Library, ///< The library to link in - bool& is_native ///< Indicates if lib a native library + StringRef Library, ///< The library to link in + bool& is_native ///< Indicates if lib a native library ); /// This function links one bitcode archive, \p Filename, into the module. @@ -223,7 +228,7 @@ class Linker { /// the archive that resolve outstanding symbols will be linked in. The /// library is searched repeatedly until no more modules that resolve /// symbols can be found. If an error occurs, the error string is set. - /// To speed up this function, ensure the the archive has been processed + /// To speed up this function, ensure the archive has been processed /// llvm-ranlib or the S option was given to llvm-ar when the archive was /// created. These tools add a symbol table to the archive which makes the /// search for undefined symbols much faster. @@ -246,7 +251,7 @@ class Linker { Module* Src, ///< Module linked into \p Dest std::string* ErrorMsg = 0 /// Error/diagnostic string ) { - return LinkModules(Composite, Src, ErrorMsg ); + return LinkModules(Composite, Src, Linker::DestroySource, ErrorMsg ); } /// This is the heart of the linker. This method will take unconditional @@ -260,14 +265,15 @@ class Linker { /// error. /// @returns True if an error occurs, false otherwise. /// @brief Generically link two modules together. - static bool LinkModules(Module* Dest, Module* Src, std::string* ErrorMsg); + static bool LinkModules(Module* Dest, Module* Src, unsigned Mode, + std::string* ErrorMsg); /// This function looks through the Linker's LibPaths to find a library with /// the name \p Filename. If the library cannot be found, the returned path /// will be empty (i.e. sys::Path::isEmpty() will return true). /// @returns A sys::Path to the found library /// @brief Find a library from its short name. - sys::Path FindLib(const std::string &Filename); + sys::Path FindLib(StringRef Filename); /// @} /// @name Implementation @@ -277,9 +283,9 @@ class Linker { /// Module it contains (wrapped in an auto_ptr), or 0 if an error occurs. std::auto_ptr LoadObject(const sys::Path& FN); - bool warning(const std::string& message); - bool error(const std::string& message); - void verbose(const std::string& message); + bool warning(StringRef message); + bool error(StringRef message); + void verbose(StringRef message); /// @} /// @name Data