llvm-6502/tools/llvm-ld/llvm-ld.cpp
Owen Anderson 081c34b725 Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which
must be called in the pass's constructor.  This function uses static dependency declarations to recursively initialize
the pass's dependencies.

Clients that only create passes through the createFooPass() APIs will require no changes.  Clients that want to use the
CommandLine options for passes will need to manually call the appropriate initialization functions in PassInitialization.h
before parsing commandline arguments.

I have tested this with all standard configurations of clang and llvm-gcc on Darwin.  It is possible that there are problems
with the static dependencies that will only be visible with non-standard options.  If you encounter any crash in pass
registration/creation, please send the testcase to me directly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116820 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-19 17:21:58 +00:00

736 lines
26 KiB
C++

//===- llvm-ld.cpp - LLVM 'ld' compatible linker --------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file 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
// system 'ld' conventions. As such, the default output file is ./a.out.
// Additionally, this program outputs a shell script that is used to invoke LLI
// to execute the program. In this manner, the generated executable (a.out for
// example), is directly executable, whereas the bitcode file actually lives in
// the a.out.bc file generated by this program.
//
// Note that if someone (or a script) deletes the executable program generated,
// the .bc file will be left around. Considering that this is a temporary hack,
// I'm not too worried about this.
//
//===----------------------------------------------------------------------===//
#include "llvm/LinkAllVMCore.h"
#include "llvm/Linker.h"
#include "llvm/LLVMContext.h"
#include "llvm/System/Program.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileUtilities.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/SystemUtils.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/System/Signals.h"
#include "llvm/Config/config.h"
#include <memory>
#include <cstring>
using namespace llvm;
// Rightly this should go in a header file but it just seems such a waste.
namespace llvm {
extern void Optimize(Module*);
}
// Input/Output Options
static cl::list<std::string> InputFilenames(cl::Positional, cl::OneOrMore,
cl::desc("<input bitcode files>"));
static cl::opt<std::string> OutputFilename("o", cl::init("a.out"),
cl::desc("Override output filename"),
cl::value_desc("filename"));
static cl::opt<std::string> BitcodeOutputFilename("b", cl::init(""),
cl::desc("Override bitcode output filename"),
cl::value_desc("filename"));
static cl::opt<bool> Verbose("v",
cl::desc("Print information about actions taken"));
static cl::list<std::string> LibPaths("L", cl::Prefix,
cl::desc("Specify a library search path"),
cl::value_desc("directory"));
static cl::list<std::string> FrameworkPaths("F", cl::Prefix,
cl::desc("Specify a framework search path"),
cl::value_desc("directory"));
static cl::list<std::string> Libraries("l", cl::Prefix,
cl::desc("Specify libraries to link to"),
cl::value_desc("library prefix"));
static cl::list<std::string> Frameworks("framework",
cl::desc("Specify frameworks to link to"),
cl::value_desc("framework"));
// Options to control the linking, optimization, and code gen processes
static cl::opt<bool> 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<bool> Native("native",
cl::desc("Generate a native binary instead of a shell script"));
static cl::opt<bool>NativeCBE("native-cbe",
cl::desc("Generate a native binary with the C backend and GCC"));
static cl::list<std::string> PostLinkOpts("post-link-opts",
cl::value_desc("path"),
cl::desc("Run one or more optimization programs after linking"));
static cl::list<std::string> XLinker("Xlinker", cl::value_desc("option"),
cl::desc("Pass options to the system linker"));
// Compatibility options that llvm-ld ignores but are supported for
// compatibility with LD
static cl::opt<std::string> CO3("soname", cl::Hidden,
cl::desc("Compatibility option: ignored"));
static cl::opt<std::string> CO4("version-script", cl::Hidden,
cl::desc("Compatibility option: ignored"));
static cl::opt<bool> CO5("eh-frame-hdr", cl::Hidden,
cl::desc("Compatibility option: ignored"));
static cl::opt<std::string> CO6("h", cl::Hidden,
cl::desc("Compatibility option: ignored"));
static cl::opt<bool> CO7("start-group", cl::Hidden,
cl::desc("Compatibility option: ignored"));
static cl::opt<bool> CO8("end-group", cl::Hidden,
cl::desc("Compatibility option: ignored"));
static cl::opt<std::string> CO9("m", 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;
/// FileRemover objects to clean up output files in the event of an error.
static FileRemover OutputRemover;
static FileRemover BitcodeOutputRemover;
/// PrintAndExit - Prints a message to standard error and exits with error code
///
/// Inputs:
/// Message - The message to print to standard error.
///
static void PrintAndExit(const std::string &Message, Module *M, int errcode = 1) {
errs() << progname << ": " << Message << "\n";
delete M;
llvm_shutdown();
exit(errcode);
}
static void PrintCommand(const std::vector<const char*> &args) {
std::vector<const char*>::const_iterator I = args.begin(), E = args.end();
for (; I != E; ++I)
if (*I)
errs() << "'" << *I << "'" << " ";
errs() << "\n";
}
/// 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) {
size_t len = strlen(envp[entries]) + 1;
newenv[entries] = new char[len];
memcpy(newenv[entries], envp[entries], len);
++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;
}
/// GenerateBitcode - generates a bitcode file from the module provided
void GenerateBitcode(Module* M, const std::string& FileName) {
if (Verbose)
errs() << "Generating Bitcode To " << FileName << '\n';
// Create the output file.
std::string ErrorInfo;
tool_output_file Out(FileName.c_str(), ErrorInfo,
raw_fd_ostream::F_Binary);
if (!ErrorInfo.empty()) {
PrintAndExit(ErrorInfo, M);
return;
}
// Write it out
WriteBitcodeToFile(M, Out.os());
Out.keep();
}
/// GenerateAssembly - generates a native assembly language source file from the
/// specified bitcode file.
///
/// Inputs:
/// InputFilename - The name of the input bitcode 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 bitcode file into assembly code.
std::vector<const char*> args;
args.push_back(llc.c_str());
// We will use GCC to assemble the program so set the assembly syntax to AT&T,
// regardless of what the target in the bitcode file is.
args.push_back("-x86-asm-syntax=att");
args.push_back("-o");
args.push_back(OutputFilename.c_str());
args.push_back(InputFilename.c_str());
args.push_back(0);
if (Verbose) {
errs() << "Generating Assembly With: \n";
PrintCommand(args);
}
return sys::Program::ExecuteAndWait(llc, &args[0], 0, 0, 0, 0, &ErrMsg);
}
/// GenerateCFile - generates a C source file from the specified bitcode file.
static int GenerateCFile(const std::string &OutputFile,
const std::string &InputFile,
const sys::Path &llc,
std::string& ErrMsg) {
// Run LLC to convert the bitcode file into C.
std::vector<const char*> args;
args.push_back(llc.c_str());
args.push_back("-march=c");
args.push_back("-o");
args.push_back(OutputFile.c_str());
args.push_back(InputFile.c_str());
args.push_back(0);
if (Verbose) {
errs() << "Generating C Source With: \n";
PrintCommand(args);
}
return sys::Program::ExecuteAndWait(llc, &args[0], 0, 0, 0, 0, &ErrMsg);
}
/// GenerateNative - generates a native object file from the
/// specified bitcode file.
///
/// Inputs:
/// InputFilename - The name of the input bitcode file.
/// OutputFilename - The name of the file to generate.
/// NativeLinkItems - The native libraries, files, code with which to link
/// LibPaths - The list of directories in which to find libraries.
/// FrameworksPaths - The list of directories in which to find frameworks.
/// Frameworks - The list of frameworks (dynamic 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<std::string> 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);
args.push_back(InputFilename);
// Add in the library and framework paths
for (unsigned index = 0; index < LibPaths.size(); index++) {
args.push_back("-L" + LibPaths[index]);
}
for (unsigned index = 0; index < FrameworkPaths.size(); index++) {
args.push_back("-F" + FrameworkPaths[index]);
}
// Add the requested options
for (unsigned index = 0; index < XLinker.size(); index++)
args.push_back(XLinker[index]);
// Add in the libraries to link.
for (unsigned index = 0; index < LinkItems.size(); index++)
if (LinkItems[index].first != "crtend") {
if (LinkItems[index].second)
args.push_back("-l" + LinkItems[index].first);
else
args.push_back(LinkItems[index].first);
}
// Add in frameworks to link.
for (unsigned index = 0; index < Frameworks.size(); index++) {
args.push_back("-framework");
args.push_back(Frameworks[index]);
}
// Now that "args" owns all the std::strings for the arguments, call the c_str
// method to get the underlying string array. We do this game so that the
// std::string array is guaranteed to outlive the const char* array.
std::vector<const char *> Args;
for (unsigned i = 0, e = args.size(); i != e; ++i)
Args.push_back(args[i].c_str());
Args.push_back(0);
if (Verbose) {
errs() << "Generating Native Executable With:\n";
PrintCommand(Args);
}
// Run the compiler to assembly and link together the program.
int R = sys::Program::ExecuteAndWait(
gcc, &Args[0], const_cast<const char **>(clean_env), 0, 0, 0, &ErrMsg);
delete [] clean_env;
return R;
}
/// EmitShellScript - Output the wrapper file that invokes the JIT on the LLVM
/// bitcode file for the program.
static void EmitShellScript(char **argv, Module *M) {
if (Verbose)
errs() << "Emitting Shell Script\n";
#if defined(_WIN32) || defined(__CYGWIN__)
// 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 ErrMsg;
sys::Path llvmstub = FindExecutable("llvm-stub.exe", argv[0],
(void *)(intptr_t)&Optimize);
if (llvmstub.isEmpty())
PrintAndExit("Could not find llvm-stub.exe executable!", M);
if (0 != sys::CopyFile(sys::Path(OutputFilename), llvmstub, &ErrMsg))
PrintAndExit(ErrMsg, M);
return;
#endif
// Output the script to start the program...
std::string ErrorInfo;
tool_output_file Out2(OutputFilename.c_str(), ErrorInfo);
if (!ErrorInfo.empty())
PrintAndExit(ErrorInfo, M);
Out2.os() << "#!/bin/sh\n";
// Allow user to setenv LLVMINTERP if lli is not in their PATH.
Out2.os() << "lli=${LLVMINTERP-lli}\n";
Out2.os() << "exec $lli \\\n";
// gcc accepts -l<lib> and implicitly searches /lib and /usr/lib.
LibPaths.push_back("/lib");
LibPaths.push_back("/usr/lib");
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<std::string>::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<std::string>::iterator i = Libraries.begin(),
e = Libraries.end(); i != e; ++i) {
// try explicit -L arguments first:
sys::Path FullLibraryPath;
for (cl::list<std::string>::const_iterator P = LibPaths.begin(),
E = LibPaths.end(); P != E; ++P) {
FullLibraryPath = *P;
FullLibraryPath.appendComponent("lib" + *i);
FullLibraryPath.appendSuffix(&(LTDL_SHLIB_EXT[1]));
if (!FullLibraryPath.isEmpty()) {
if (!FullLibraryPath.isDynamicLibrary()) {
// Not a native shared library; mark as invalid
FullLibraryPath = sys::Path();
} else break;
}
}
if (FullLibraryPath.isEmpty())
FullLibraryPath = sys::Path::FindLibrary(*i);
if (!FullLibraryPath.isEmpty())
Out2.os() << " -load=" << FullLibraryPath.str() << " \\\n";
}
Out2.os() << " " << BitcodeOutputFilename << " ${1+\"$@\"}\n";
Out2.keep();
}
// 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<std::string>& Files,
const cl::list<std::string>& Libraries) {
// Build the list of linkage items for LinkItems.
cl::list<std::string>::const_iterator fileIt = Files.begin();
cl::list<std::string>::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));
}
}
}
int main(int argc, char **argv, char **envp) {
// Print a stack trace if we signal out.
sys::PrintStackTraceOnErrorSignal();
PrettyStackTraceProgram X(argc, argv);
LLVMContext &Context = getGlobalContext();
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
// Initialize passes
PassRegistry &Registry = *PassRegistry::getPassRegistry();
initializeCore(Registry);
initializeScalarOpts(Registry);
initializeIPO(Registry);
initializeAnalysis(Registry);
initializeIPA(Registry);
initializeTransformUtils(Registry);
initializeInstCombine(Registry);
initializeTarget(Registry);
// 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");
#if defined(_WIN32) || defined(__CYGWIN__)
if (!LinkAsLibrary) {
// Default to "a.exe" instead of "a.out".
if (OutputFilename.getNumOccurrences() == 0)
OutputFilename = "a.exe";
// If there is no suffix add an "exe" one.
sys::Path ExeFile( OutputFilename );
if (ExeFile.getSuffix() == "") {
ExeFile.appendSuffix("exe");
OutputFilename = ExeFile.str();
}
}
#endif
// Generate the bitcode for the optimized module.
// If -b wasn't specified, use the name specified
// with -o to construct BitcodeOutputFilename.
if (BitcodeOutputFilename.empty()) {
BitcodeOutputFilename = OutputFilename;
if (!LinkAsLibrary) BitcodeOutputFilename += ".bc";
}
// Arrange for the bitcode output file to be deleted on any errors.
BitcodeOutputRemover.setFile(sys::Path(BitcodeOutputFilename));
sys::RemoveFileOnSignal(sys::Path(BitcodeOutputFilename));
// Arrange for the output file to be deleted on any errors.
if (!LinkAsLibrary) {
OutputRemover.setFile(sys::Path(OutputFilename));
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
// Construct a Linker (now that Verbose is set)
Linker TheLinker(progname, OutputFilename, Context, Verbose);
// Keep track of the native link items (versus the bitcode items)
Linker::ItemList NativeLinkItems;
// 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<sys::Path> 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<std::string>::const_iterator I = Libraries.begin(),
E = Libraries.end(); I != E ; ++I) {
TheLinker.getModule()->addLibrary(*I);
}
} else {
// 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, NativeLinkItems) )
return 1; // Error already printed
}
std::auto_ptr<Module> Composite(TheLinker.releaseModule());
// Optimize the module
Optimize(Composite.get());
// Generate the bitcode output.
GenerateBitcode(Composite.get(), BitcodeOutputFilename);
// 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<std::string> opts = PostLinkOpts;
for (std::vector<std::string>::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())
PrintAndExit(std::string("Optimization program '") + *I +
"' is not found or not executable.", Composite.get());
}
// Get the program arguments
sys::Path tmp_output("opt_result");
std::string ErrMsg;
if (tmp_output.createTemporaryFileOnDisk(true, &ErrMsg))
PrintAndExit(ErrMsg, Composite.get());
const char* args[4];
args[0] = I->c_str();
args[1] = BitcodeOutputFilename.c_str();
args[2] = tmp_output.c_str();
args[3] = 0;
if (0 == sys::Program::ExecuteAndWait(prog, args, 0,0,0,0, &ErrMsg)) {
if (tmp_output.isBitcodeFile()) {
sys::Path target(BitcodeOutputFilename);
target.eraseFromDisk();
if (tmp_output.renamePathOnDisk(target, &ErrMsg))
PrintAndExit(ErrMsg, Composite.get(), 2);
} else
PrintAndExit("Post-link optimization output is not bitcode",
Composite.get());
} else {
PrintAndExit(ErrMsg, Composite.get());
}
}
}
// If the user wants to generate a native executable, compile it from the
// bitcode file.
//
// Otherwise, create a script that will run the bitcode 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.
FileRemover AssemblyFileRemover(AssemblyFile);
sys::RemoveFileOnSignal(AssemblyFile);
// Determine the locations of the llc and gcc programs.
sys::Path llc = FindExecutable("llc", argv[0],
(void *)(intptr_t)&Optimize);
if (llc.isEmpty())
PrintAndExit("Failed to find llc", Composite.get());
sys::Path gcc = sys::Program::FindProgramByName("gcc");
if (gcc.isEmpty())
PrintAndExit("Failed to find gcc", Composite.get());
// Generate an assembly language file for the bitcode.
std::string ErrMsg;
if (0 != GenerateAssembly(AssemblyFile.str(), BitcodeOutputFilename,
llc, ErrMsg))
PrintAndExit(ErrMsg, Composite.get());
if (0 != GenerateNative(OutputFilename, AssemblyFile.str(),
NativeLinkItems, gcc, envp, ErrMsg))
PrintAndExit(ErrMsg, Composite.get());
} else if (NativeCBE) {
sys::Path CFile (OutputFilename);
CFile.appendSuffix("cbe.c");
// Mark the output files for removal.
FileRemover CFileRemover(CFile);
sys::RemoveFileOnSignal(CFile);
// Determine the locations of the llc and gcc programs.
sys::Path llc = FindExecutable("llc", argv[0],
(void *)(intptr_t)&Optimize);
if (llc.isEmpty())
PrintAndExit("Failed to find llc", Composite.get());
sys::Path gcc = sys::Program::FindProgramByName("gcc");
if (gcc.isEmpty())
PrintAndExit("Failed to find gcc", Composite.get());
// Generate an assembly language file for the bitcode.
std::string ErrMsg;
if (GenerateCFile(CFile.str(), BitcodeOutputFilename, llc, ErrMsg))
PrintAndExit(ErrMsg, Composite.get());
if (GenerateNative(OutputFilename, CFile.str(),
NativeLinkItems, gcc, envp, ErrMsg))
PrintAndExit(ErrMsg, Composite.get());
} else {
EmitShellScript(argv, Composite.get());
}
// Make the script executable...
std::string ErrMsg;
if (sys::Path(OutputFilename).makeExecutableOnDisk(&ErrMsg))
PrintAndExit(ErrMsg, Composite.get());
// Make the bitcode file readable and directly executable in LLEE as well
if (sys::Path(BitcodeOutputFilename).makeExecutableOnDisk(&ErrMsg))
PrintAndExit(ErrMsg, Composite.get());
if (sys::Path(BitcodeOutputFilename).makeReadableOnDisk(&ErrMsg))
PrintAndExit(ErrMsg, Composite.get());
}
// Operations which may fail are now complete.
BitcodeOutputRemover.releaseFile();
if (!LinkAsLibrary)
OutputRemover.releaseFile();
// Graceful exit
return 0;
}