X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Fllvm-ld%2Fllvm-ld.cpp;h=fe825f9fed6efd1bcd0ab195cf7dc675d39e4a02;hb=68fe61d6a165ea6090008e281330895a21607daf;hp=5f36f9e801f965722eb0434f6db7fa8759321fb4;hpb=605b9e2c5bd1b0c151a0b15d01e6df3aba93d52f;p=oota-llvm.git diff --git a/tools/llvm-ld/llvm-ld.cpp b/tools/llvm-ld/llvm-ld.cpp index 5f36f9e801f..fe825f9fed6 100644 --- a/tools/llvm-ld/llvm-ld.cpp +++ b/tools/llvm-ld/llvm-ld.cpp @@ -1,10 +1,10 @@ //===- llvm-ld.cpp - LLVM 'ld' compatible linker --------------------------===// -// +// // The LLVM Compiler Infrastructure // // This file was developed by the LLVM research group and is distributed under // the University of Illinois Open Source License. See LICENSE.TXT for details. -// +// //===----------------------------------------------------------------------===// // // This utility is intended to be compatible with GCC, and follows standard @@ -20,109 +20,86 @@ // //===----------------------------------------------------------------------===// -#include "llvm-ld.h" +#include "llvm/LinkAllVMCore.h" #include "llvm/Linker.h" +#include "llvm/System/Program.h" #include "llvm/Module.h" #include "llvm/PassManager.h" #include "llvm/Bytecode/Reader.h" -#include "llvm/Bytecode/WriteBytecodePass.h" +#include "llvm/Bytecode/Writer.h" #include "llvm/Target/TargetData.h" #include "llvm/Target/TargetMachine.h" #include "llvm/Target/TargetMachineRegistry.h" -#include "llvm/Transforms/IPO.h" -#include "llvm/Transforms/Scalar.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/FileUtilities.h" -#include "llvm/System/Signals.h" +#include "llvm/Support/Streams.h" #include "llvm/Support/SystemUtils.h" +#include "llvm/System/Signals.h" #include #include using namespace llvm; -enum OptimizationLevels { - OPT_FAST_COMPILE, - OPT_SIMPLE, - OPT_AGGRESSIVE, - OPT_LINK_TIME, - OPT_AGGRESSIVE_LINK_TIME -}; - -namespace { - cl::list - InputFilenames(cl::Positional, cl::desc(""), - cl::OneOrMore); - - cl::opt - OutputFilename("o", cl::desc("Override output filename"), cl::init("a.out"), - cl::value_desc("filename")); - - cl::opt - Verbose("v", cl::desc("Print information about actions taken")); - - cl::list - LibPaths("L", cl::desc("Specify a library search path"), cl::Prefix, - cl::value_desc("directory")); - - cl::list - Libraries("l", cl::desc("Specify libraries to link to"), cl::Prefix, - cl::value_desc("library prefix")); - - cl::opt - Strip("s", cl::desc("Strip symbol info from executable")); - - cl::opt - NoInternalize("disable-internalize", - cl::desc("Do not mark all symbols as internal")); - cl::alias - ExportDynamic("export-dynamic", cl::desc("Alias for -disable-internalize"), - cl::aliasopt(NoInternalize)); - - cl::opt - LinkAsLibrary("link-as-library", cl::desc("Link the .bc files together as a" - " library, not an executable")); - cl::alias - Relink("r", cl::desc("Alias for -link-as-library"), - cl::aliasopt(LinkAsLibrary)); - - cl::opt +// Input/Output Options +static cl::list InputFilenames(cl::Positional, cl::OneOrMore, + cl::desc("")); + +static cl::opt OutputFilename("o", cl::init("a.out"), + cl::desc("Override output filename"), + cl::value_desc("filename")); + +static cl::opt Verbose("v", + cl::desc("Print information about actions taken")); + +static cl::list LibPaths("L", cl::Prefix, + cl::desc("Specify a library search path"), + cl::value_desc("directory")); + +static cl::list Libraries("l", cl::Prefix, + cl::desc("Specify libraries to link to"), + cl::value_desc("library prefix")); + +static cl::opt LinkAsLibrary("link-as-library", + cl::desc("Link the .bc files together as a library, not an executable")); + +static cl::alias Relink("r", cl::aliasopt(LinkAsLibrary), + cl::desc("Alias for -link-as-library")); + +static cl::opt MachineArch("march", cl::desc("Architecture to generate assembly for:")); - cl::opt - Native("native", - cl::desc("Generate a native binary instead of a shell script")); - cl::opt - NativeCBE("native-cbe", - cl::desc("Generate a native binary with the C backend and GCC")); - - // Compatibility options that are ignored but supported by LD - cl::opt - CO3("soname", cl::Hidden, cl::desc("Compatibility option: ignored")); - cl::opt - CO4("version-script", cl::Hidden, cl::desc("Compatibility option: ignored")); - cl::opt - CO5("eh-frame-hdr", cl::Hidden, cl::desc("Compatibility option: ignored")); - cl::opt - CO6("h", cl::Hidden, cl::desc("Compatibility option: ignored")); - - cl::opt OptLevel( - cl::desc("Choose level of optimization to apply:"), - cl::init(OPT_FAST_COMPILE), cl::values( - clEnumValN(OPT_FAST_COMPILE,"O0", - "An alias for the -O1 option."), - clEnumValN(OPT_FAST_COMPILE,"O1", - "Optimize for linking speed, not execution speed."), - clEnumValN(OPT_SIMPLE,"O2", - "Perform only required/minimal optimizations"), - clEnumValN(OPT_AGGRESSIVE,"O3", - "An alias for the -O2 option."), - clEnumValN(OPT_LINK_TIME,"O4", - "Perform standard link time optimizations"), - clEnumValN(OPT_AGGRESSIVE_LINK_TIME,"O5", - "Perform aggressive link time optimizations"), - clEnumValEnd - ) - ); -} +static cl::opt Native("native", + cl::desc("Generate a native binary instead of a shell script")); + +static cl::optNativeCBE("native-cbe", + cl::desc("Generate a native binary with the C backend and GCC")); + +static cl::optDisableCompression("disable-compression",cl::init(false), + cl::desc("Disable writing of compressed bytecode files")); + +static cl::list PostLinkOpts("post-link-opts", + cl::value_desc("path"), + cl::desc("Run one or more optimization programs after linking")); + +static cl::list XLinker("Xlinker", cl::value_desc("option"), + cl::desc("Pass options to the system linker")); + +// Compatibility options that are ignored but supported by LD +static cl::opt CO3("soname", cl::Hidden, + cl::desc("Compatibility option: ignored")); + +static cl::opt CO4("version-script", cl::Hidden, + cl::desc("Compatibility option: ignored")); + +static cl::opt CO5("eh-frame-hdr", cl::Hidden, + cl::desc("Compatibility option: ignored")); + +static cl::opt CO6("h", cl::Hidden, + cl::desc("Compatibility option: ignored")); + + +/// This is just for convenience so it doesn't have to be passed around +/// everywhere. +static std::string progname; /// PrintAndReturn - Prints a message to standard error and returns true. /// @@ -130,11 +107,240 @@ namespace { /// progname - The name of the program (i.e. argv[0]). /// Message - The message to print to standard error. /// -static int PrintAndReturn(const char *progname, const std::string &Message) { - std::cerr << progname << ": " << Message << "\n"; +static int PrintAndReturn(const std::string &Message) { + llvm_cerr << progname << ": " << Message << "\n"; return 1; } +/// CopyEnv - This function takes an array of environment variables and makes a +/// copy of it. This copy can then be manipulated any way the caller likes +/// without affecting the process's real environment. +/// +/// Inputs: +/// envp - An array of C strings containing an environment. +/// +/// Return value: +/// NULL - An error occurred. +/// +/// Otherwise, a pointer to a new array of C strings is returned. Every string +/// in the array is a duplicate of the one in the original array (i.e. we do +/// not copy the char *'s from one array to another). +/// +static char ** CopyEnv(char ** const envp) { + // Count the number of entries in the old list; + unsigned entries; // The number of entries in the old environment list + for (entries = 0; envp[entries] != NULL; entries++) + /*empty*/; + + // Add one more entry for the NULL pointer that ends the list. + ++entries; + + // If there are no entries at all, just return NULL. + if (entries == 0) + return NULL; + + // Allocate a new environment list. + char **newenv = new char* [entries]; + if ((newenv = new char* [entries]) == NULL) + return NULL; + + // Make a copy of the list. Don't forget the NULL that ends the list. + entries = 0; + while (envp[entries] != NULL) { + newenv[entries] = new char[strlen (envp[entries]) + 1]; + strcpy (newenv[entries], envp[entries]); + ++entries; + } + newenv[entries] = NULL; + + return newenv; +} + + +/// RemoveEnv - Remove the specified environment variable from the environment +/// array. +/// +/// Inputs: +/// name - The name of the variable to remove. It cannot be NULL. +/// envp - The array of environment variables. It cannot be NULL. +/// +/// Notes: +/// This is mainly done because functions to remove items from the environment +/// are not available across all platforms. In particular, Solaris does not +/// seem to have an unsetenv() function or a setenv() function (or they are +/// undocumented if they do exist). +/// +static void RemoveEnv(const char * name, char ** const envp) { + for (unsigned index=0; envp[index] != NULL; index++) { + // Find the first equals sign in the array and make it an EOS character. + char *p = strchr (envp[index], '='); + if (p == NULL) + continue; + else + *p = '\0'; + + // Compare the two strings. If they are equal, zap this string. + // Otherwise, restore it. + if (!strcmp(name, envp[index])) + *envp[index] = '\0'; + else + *p = '='; + } + + return; +} + +/// GenerateBytecode - generates a bytecode file from the module provided +void GenerateBytecode(Module* M, const std::string& FileName) { + + // Create the output file. + std::ios::openmode io_mode = std::ios::out | std::ios::trunc | + std::ios::binary; + std::ofstream Out(FileName.c_str(), io_mode); + if (!Out.good()) { + PrintAndReturn("error opening '" + FileName + "' for writing!"); + return; + } + + // Ensure that the bytecode file gets removed from the disk if we get a + // terminating signal. + sys::RemoveFileOnSignal(sys::Path(FileName)); + + // Write it out + llvm_ostream L(Out); + WriteBytecodeToFile(M, L, !DisableCompression); + + // Close the bytecode file. + Out.close(); +} + +/// GenerateAssembly - generates a native assembly language source file from the +/// specified bytecode file. +/// +/// Inputs: +/// InputFilename - The name of the input bytecode file. +/// OutputFilename - The name of the file to generate. +/// llc - The pathname to use for LLC. +/// envp - The environment to use when running LLC. +/// +/// Return non-zero value on error. +/// +static int GenerateAssembly(const std::string &OutputFilename, + const std::string &InputFilename, + const sys::Path &llc, + std::string &ErrMsg ) { + // Run LLC to convert the bytecode file into assembly code. + std::vector args; + args.push_back(llc.c_str()); + args.push_back("-f"); + args.push_back("-o"); + args.push_back(OutputFilename.c_str()); + args.push_back(InputFilename.c_str()); + args.push_back(0); + + return sys::Program::ExecuteAndWait(llc,&args[0],0,0,0,&ErrMsg); +} + +/// GenerateCFile - generates a C source file from the specified bytecode file. +static int GenerateCFile(const std::string &OutputFile, + const std::string &InputFile, + const sys::Path &llc, + std::string& ErrMsg) { + // Run LLC to convert the bytecode file into C. + std::vector args; + args.push_back(llc.c_str()); + args.push_back("-march=c"); + args.push_back("-f"); + args.push_back("-o"); + args.push_back(OutputFile.c_str()); + args.push_back(InputFile.c_str()); + args.push_back(0); + return sys::Program::ExecuteAndWait(llc, &args[0],0,0,0,&ErrMsg); +} + +/// GenerateNative - generates a native object file from the +/// specified bytecode file. +/// +/// Inputs: +/// InputFilename - The name of the input bytecode file. +/// OutputFilename - The name of the file to generate. +/// LinkItems - The native libraries, files, code with which to link +/// LibPaths - The list of directories in which to find libraries. +/// gcc - The pathname to use for GGC. +/// envp - A copy of the process's current environment. +/// +/// Outputs: +/// None. +/// +/// Returns non-zero value on error. +/// +static int GenerateNative(const std::string &OutputFilename, + const std::string &InputFilename, + const Linker::ItemList &LinkItems, + const sys::Path &gcc, char ** const envp, + std::string& ErrMsg) { + // Remove these environment variables from the environment of the + // programs that we will execute. It appears that GCC sets these + // environment variables so that the programs it uses can configure + // themselves identically. + // + // However, when we invoke GCC below, we want it to use its normal + // configuration. Hence, we must sanitize its environment. + char ** clean_env = CopyEnv(envp); + if (clean_env == NULL) + return 1; + RemoveEnv("LIBRARY_PATH", clean_env); + RemoveEnv("COLLECT_GCC_OPTIONS", clean_env); + RemoveEnv("GCC_EXEC_PREFIX", clean_env); + RemoveEnv("COMPILER_PATH", clean_env); + RemoveEnv("COLLECT_GCC", clean_env); + + + // Run GCC to assemble and link the program into native code. + // + // Note: + // We can't just assemble and link the file with the system assembler + // and linker because we don't know where to put the _start symbol. + // GCC mysteriously knows how to do it. + std::vector args; + args.push_back(gcc.c_str()); + args.push_back("-fno-strict-aliasing"); + args.push_back("-O3"); + args.push_back("-o"); + args.push_back(OutputFilename.c_str()); + args.push_back(InputFilename.c_str()); + + // Add in the library paths + for (unsigned index = 0; index < LibPaths.size(); index++) { + args.push_back("-L"); + args.push_back(LibPaths[index].c_str()); + } + + // Add the requested options + for (unsigned index = 0; index < XLinker.size(); index++) { + args.push_back(XLinker[index].c_str()); + args.push_back(Libraries[index].c_str()); + } + + // Add in the libraries to link. + for (unsigned index = 0; index < LinkItems.size(); index++) + if (LinkItems[index].first != "crtend") { + if (LinkItems[index].second) { + std::string lib_name = "-l" + LinkItems[index].first; + args.push_back(lib_name.c_str()); + } else + args.push_back(LinkItems[index].first.c_str()); + } + + args.push_back(0); + + // Run the compiler to assembly and link together the program. + int R = sys::Program::ExecuteAndWait( + gcc, &args[0], (const char**)clean_env,0,0,&ErrMsg); + delete [] clean_env; + return R; +} + /// EmitShellScript - Output the wrapper file that invokes the JIT on the LLVM /// bytecode file for the program. static void EmitShellScript(char **argv) { @@ -142,23 +348,25 @@ static void EmitShellScript(char **argv) { // Windows doesn't support #!/bin/sh style shell scripts in .exe files. To // support windows systems, we copy the llvm-stub.exe executable from the // build tree to the destination file. - std::string llvmstub = FindExecutable("llvm-stub.exe", argv[0]); - if (llvmstub.empty()) { - std::cerr << "Could not find llvm-stub.exe executable!\n"; + std::string ErrMsg; + sys::Path llvmstub = FindExecutable("llvm-stub.exe", argv[0]); + if (llvmstub.isEmpty()) { + llvm_cerr << "Could not find llvm-stub.exe executable!\n"; exit(1); } - if (CopyFile(OutputFilename, llvmstub)) { - std::cerr << "Could not copy the llvm-stub.exe executable!\n"; - exit(1); + + if (0 != sys::CopyFile(sys::Path(OutputFilename), llvmstub, &ErrMsg)) { + llvm_cerr << argv[0] << ": " << ErrMsg << "\n"; + exit(1); } + return; #endif // Output the script to start the program... std::ofstream Out2(OutputFilename.c_str()); if (!Out2.good()) - exit(PrintAndReturn(argv[0], "error opening '" + OutputFilename + - "' for writing!")); + exit(PrintAndReturn("error opening '" + OutputFilename + "' for writing!")); Out2 << "#!/bin/sh\n"; // Allow user to setenv LLVMINTERP if lli is not in their PATH. @@ -170,138 +378,262 @@ static void EmitShellScript(char **argv) { LibPaths.push_back("/usr/X11R6/lib"); // We don't need to link in libc! In fact, /usr/lib/libc.so may not be a // shared object at all! See RH 8: plain text. - std::vector::iterator libc = + std::vector::iterator libc = std::find(Libraries.begin(), Libraries.end(), "c"); if (libc != Libraries.end()) Libraries.erase(libc); // List all the shared object (native) libraries this executable will need // on the command line, so that we don't have to do this manually! - for (std::vector::iterator i = Libraries.begin(), + for (std::vector::iterator i = Libraries.begin(), e = Libraries.end(); i != e; ++i) { - std::string FullLibraryPath = FindLib(*i, LibPaths, true); - if (!FullLibraryPath.empty() && IsSharedObject(FullLibraryPath)) - Out2 << " -load=" << FullLibraryPath << " \\\n"; + sys::Path FullLibraryPath = sys::Path::FindLibrary(*i); + if (!FullLibraryPath.isEmpty() && FullLibraryPath.isDynamicLibrary()) + Out2 << " -load=" << FullLibraryPath.toString() << " \\\n"; } Out2 << " $0.bc ${1+\"$@\"}\n"; Out2.close(); } -int main(int argc, char **argv, char **envp) { - cl::ParseCommandLineOptions(argc, argv, " llvm linker for GCC\n"); - sys::PrintStackTraceOnErrorSignal(); - - std::string ModuleID("llvm-ld-output"); - std::auto_ptr Composite(new Module(ModuleID)); - - // We always look first in the current directory when searching for libraries. - LibPaths.insert(LibPaths.begin(), "."); - - // If the user specified an extra search path in their environment, respect - // it. - if (char *SearchPath = getenv("LLVM_LIB_SEARCH_PATH")) - LibPaths.push_back(SearchPath); - - // Remove any consecutive duplicates of the same library... - Libraries.erase(std::unique(Libraries.begin(), Libraries.end()), - Libraries.end()); - - // Link in all of the files - if (LinkFiles(argv[0], Composite.get(), InputFilenames, Verbose)) - return 1; // Error already printed - - // Link in all of the libraries next... - if (!LinkAsLibrary) - LinkLibraries(argv[0], Composite.get(), Libraries, LibPaths, - Verbose, Native); - - // Create the output file. - std::string RealBytecodeOutput = OutputFilename; - if (!LinkAsLibrary) RealBytecodeOutput += ".bc"; - std::ofstream Out(RealBytecodeOutput.c_str()); - if (!Out.good()) - return PrintAndReturn(argv[0], "error opening '" + RealBytecodeOutput + - "' for writing!"); - - // Ensure that the bytecode file gets removed from the disk if we get a - // terminating signal. - sys::RemoveFileOnSignal(sys::Path(RealBytecodeOutput)); - - // Generate the bytecode file. - if (GenerateBytecode(Composite.get(), Strip, !NoInternalize, &Out)) { - Out.close(); - return PrintAndReturn(argv[0], "error generating bytecode"); +// BuildLinkItems -- This function generates a LinkItemList for the LinkItems +// linker function by combining the Files and Libraries in the order they were +// declared on the command line. +static void BuildLinkItems( + Linker::ItemList& Items, + const cl::list& Files, + const cl::list& Libraries) { + + // Build the list of linkage items for LinkItems. + + cl::list::const_iterator fileIt = Files.begin(); + cl::list::const_iterator libIt = Libraries.begin(); + + int libPos = -1, filePos = -1; + while ( libIt != Libraries.end() || fileIt != Files.end() ) { + if (libIt != Libraries.end()) + libPos = Libraries.getPosition(libIt - Libraries.begin()); + else + libPos = -1; + if (fileIt != Files.end()) + filePos = Files.getPosition(fileIt - Files.begin()); + else + filePos = -1; + + if (filePos != -1 && (libPos == -1 || filePos < libPos)) { + // Add a source file + Items.push_back(std::make_pair(*fileIt++, false)); + } else if (libPos != -1 && (filePos == -1 || libPos < filePos)) { + // Add a library + Items.push_back(std::make_pair(*libIt++, true)); + } } +} - // Close the bytecode file. - Out.close(); - - // If we are not linking a library, generate either a native executable - // or a JIT shell script, depending upon what the user wants. - if (!LinkAsLibrary) { - // If the user wants to generate a native executable, compile it from the - // bytecode file. - // - // Otherwise, create a script that will run the bytecode through the JIT. - if (Native) { - // Name of the Assembly Language output file - std::string AssemblyFile = OutputFilename + ".s"; - - // Mark the output files for removal if we get an interrupt. - sys::RemoveFileOnSignal(sys::Path(AssemblyFile)); - sys::RemoveFileOnSignal(sys::Path(OutputFilename)); - - // Determine the locations of the llc and gcc programs. - std::string llc = FindExecutable("llc", argv[0]); - std::string gcc = FindExecutable("gcc", argv[0]); - if (llc.empty()) - return PrintAndReturn(argv[0], "Failed to find llc"); - - if (gcc.empty()) - return PrintAndReturn(argv[0], "Failed to find gcc"); - - // Generate an assembly language file for the bytecode. - if (Verbose) std::cout << "Generating Assembly Code\n"; - GenerateAssembly(AssemblyFile, RealBytecodeOutput, llc, envp); - if (Verbose) std::cout << "Generating Native Code\n"; - GenerateNative(OutputFilename, AssemblyFile, Libraries, LibPaths, - gcc, envp); - - // Remove the assembly language file. - removeFile (AssemblyFile); - } else if (NativeCBE) { - std::string CFile = OutputFilename + ".cbe.c"; - - // Mark the output files for removal if we get an interrupt. - sys::RemoveFileOnSignal(sys::Path(CFile)); - sys::RemoveFileOnSignal(sys::Path(OutputFilename)); - - // Determine the locations of the llc and gcc programs. - std::string llc = FindExecutable("llc", argv[0]); - std::string gcc = FindExecutable("gcc", argv[0]); - if (llc.empty()) - return PrintAndReturn(argv[0], "Failed to find llc"); - if (gcc.empty()) - return PrintAndReturn(argv[0], "Failed to find gcc"); - - // Generate an assembly language file for the bytecode. - if (Verbose) std::cout << "Generating Assembly Code\n"; - GenerateCFile(CFile, RealBytecodeOutput, llc, envp); - if (Verbose) std::cout << "Generating Native Code\n"; - GenerateNative(OutputFilename, CFile, Libraries, LibPaths, gcc, envp); - - // Remove the assembly language file. - removeFile(CFile); +// Rightly this should go in a header file but it just seems such a waste. +namespace llvm { +extern void Optimize(Module*); +} +int main(int argc, char **argv, char **envp) { + try { + // Initial global variable above for convenience printing of program name. + progname = sys::Path(argv[0]).getBasename(); + + // Parse the command line options + cl::ParseCommandLineOptions(argc, argv, " llvm linker\n"); + sys::PrintStackTraceOnErrorSignal(); + + // Construct a Linker (now that Verbose is set) + Linker TheLinker(progname, OutputFilename, Verbose); + // Keep track of the native link items (vice the bytecode items) + Linker::ItemList LinkItems; + + // Add library paths to the linker + TheLinker.addPaths(LibPaths); + TheLinker.addSystemPaths(); + + // Remove any consecutive duplicates of the same library... + Libraries.erase(std::unique(Libraries.begin(), Libraries.end()), + Libraries.end()); + + if (LinkAsLibrary) { + std::vector Files; + for (unsigned i = 0; i < InputFilenames.size(); ++i ) + Files.push_back(sys::Path(InputFilenames[i])); + if (TheLinker.LinkInFiles(Files)) + return 1; // Error already printed + + // The libraries aren't linked in but are noted as "dependent" in the + // module. + for (cl::list::const_iterator I = Libraries.begin(), + E = Libraries.end(); I != E ; ++I) { + TheLinker.getModule()->addLibrary(*I); + } } else { - EmitShellScript(argv); + // Build a list of the items from our command line + Linker::ItemList Items; + BuildLinkItems(Items, InputFilenames, Libraries); + + // Link all the items together + if (TheLinker.LinkInItems(Items,LinkItems) ) + return 1; } - - // Make the script executable... - MakeFileExecutable(OutputFilename); - // Make the bytecode file readable and directly executable in LLEE as well - MakeFileExecutable(RealBytecodeOutput); - MakeFileReadable(RealBytecodeOutput); - } + std::auto_ptr Composite(TheLinker.releaseModule()); + + // Optimize the module + Optimize(Composite.get()); + + // Generate the bytecode for the optimized module. + std::string RealBytecodeOutput = OutputFilename; + if (!LinkAsLibrary) RealBytecodeOutput += ".bc"; + GenerateBytecode(Composite.get(), RealBytecodeOutput); + + // If we are not linking a library, generate either a native executable + // or a JIT shell script, depending upon what the user wants. + if (!LinkAsLibrary) { + // If the user wants to run a post-link optimization, run it now. + if (!PostLinkOpts.empty()) { + std::vector opts = PostLinkOpts; + for (std::vector::iterator I = opts.begin(), + E = opts.end(); I != E; ++I) { + sys::Path prog(*I); + if (!prog.canExecute()) { + prog = sys::Program::FindProgramByName(*I); + if (prog.isEmpty()) + return PrintAndReturn(std::string("Optimization program '") + *I + + "' is not found or not executable."); + } + // Get the program arguments + sys::Path tmp_output("opt_result"); + std::string ErrMsg; + if (tmp_output.createTemporaryFileOnDisk(true, &ErrMsg)) { + return PrintAndReturn(ErrMsg); + } + const char* args[4]; + args[0] = I->c_str(); + args[1] = RealBytecodeOutput.c_str(); + args[2] = tmp_output.c_str(); + args[3] = 0; + if (0 == sys::Program::ExecuteAndWait(prog, args, 0,0,0, &ErrMsg)) { + if (tmp_output.isBytecodeFile()) { + sys::Path target(RealBytecodeOutput); + target.eraseFromDisk(); + if (tmp_output.renamePathOnDisk(target, &ErrMsg)) { + llvm_cerr << argv[0] << ": " << ErrMsg << "\n"; + return 2; + } + } else + return PrintAndReturn( + "Post-link optimization output is not bytecode"); + } else { + llvm_cerr << argv[0] << ": " << ErrMsg << "\n"; + return 2; + } + } + } + + // If the user wants to generate a native executable, compile it from the + // bytecode file. + // + // Otherwise, create a script that will run the bytecode through the JIT. + if (Native) { + // Name of the Assembly Language output file + sys::Path AssemblyFile ( OutputFilename); + AssemblyFile.appendSuffix("s"); + + // Mark the output files for removal if we get an interrupt. + sys::RemoveFileOnSignal(AssemblyFile); + sys::RemoveFileOnSignal(sys::Path(OutputFilename)); + + // Determine the locations of the llc and gcc programs. + sys::Path llc = FindExecutable("llc", argv[0]); + if (llc.isEmpty()) + return PrintAndReturn("Failed to find llc"); + + sys::Path gcc = FindExecutable("gcc", argv[0]); + if (gcc.isEmpty()) + return PrintAndReturn("Failed to find gcc"); + + // Generate an assembly language file for the bytecode. + if (Verbose) llvm_cout << "Generating Assembly Code\n"; + std::string ErrMsg; + if (0 != GenerateAssembly(AssemblyFile.toString(), RealBytecodeOutput, + llc, ErrMsg)) { + llvm_cerr << argv[0] << ": " << ErrMsg << "\n"; + return 1; + } + + if (Verbose) llvm_cout << "Generating Native Code\n"; + if (0 != GenerateNative(OutputFilename, AssemblyFile.toString(), + LinkItems,gcc,envp,ErrMsg)) { + llvm_cerr << argv[0] << ": " << ErrMsg << "\n"; + return 1; + } + + // Remove the assembly language file. + AssemblyFile.eraseFromDisk(); + } else if (NativeCBE) { + sys::Path CFile (OutputFilename); + CFile.appendSuffix("cbe.c"); + + // Mark the output files for removal if we get an interrupt. + sys::RemoveFileOnSignal(CFile); + sys::RemoveFileOnSignal(sys::Path(OutputFilename)); + + // Determine the locations of the llc and gcc programs. + sys::Path llc = FindExecutable("llc", argv[0]); + if (llc.isEmpty()) + return PrintAndReturn("Failed to find llc"); + + sys::Path gcc = FindExecutable("gcc", argv[0]); + if (gcc.isEmpty()) + return PrintAndReturn("Failed to find gcc"); + + // Generate an assembly language file for the bytecode. + if (Verbose) llvm_cout << "Generating Assembly Code\n"; + std::string ErrMsg; + if (0 != GenerateCFile( + CFile.toString(), RealBytecodeOutput, llc, ErrMsg)) { + llvm_cerr << argv[0] << ": " << ErrMsg << "\n"; + return 1; + } + + if (Verbose) llvm_cout << "Generating Native Code\n"; + if (0 != GenerateNative(OutputFilename, CFile.toString(), LinkItems, + gcc, envp, ErrMsg)) { + llvm_cerr << argv[0] << ": " << ErrMsg << "\n"; + return 1; + } + + // Remove the assembly language file. + CFile.eraseFromDisk(); + + } else { + EmitShellScript(argv); + } + + // Make the script executable... + std::string ErrMsg; + if (sys::Path(OutputFilename).makeExecutableOnDisk(&ErrMsg)) { + llvm_cerr << argv[0] << ": " << ErrMsg << "\n"; + return 1; + } + + // Make the bytecode file readable and directly executable in LLEE as well + if (sys::Path(RealBytecodeOutput).makeExecutableOnDisk(&ErrMsg)) { + llvm_cerr << argv[0] << ": " << ErrMsg << "\n"; + return 1; + } + if (sys::Path(RealBytecodeOutput).makeReadableOnDisk(&ErrMsg)) { + llvm_cerr << argv[0] << ": " << ErrMsg << "\n"; + return 1; + } + } - return 0; + return 0; + } catch (const std::string& msg) { + llvm_cerr << argv[0] << ": " << msg << "\n"; + } catch (...) { + llvm_cerr << argv[0] << ": Unexpected unknown exception occurred.\n"; + } + return 1; }