int main(int argc, char **argv) {
// 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.
cl::ParseCommandLineOptions(argc, argv, "llvm extractor\n");
// Use lazy loading, since we only care about selected global values.
SMDiagnostic Err;
std::auto_ptr<Module> M;
M.reset(getLazyIRFileModule(InputFilename, Err, Context));
if (M.get() == 0) {
Err.print(argv[0], errs());
return 1;
}
// Use SetVector to avoid duplicates.
SetVector<GlobalValue *> GVs;
// Figure out which globals we should extract.
for (size_t i = 0, e = ExtractGlobals.size(); i != e; ++i) {
GlobalValue *GV = M.get()->getNamedGlobal(ExtractGlobals[i]);
if (!GV) {
errs() << argv[0] << ": program doesn't contain global named '"
<< ExtractGlobals[i] << "'!\n";
return 1;
}
GVs.insert(GV);
}
// Extract globals via regular expression matching.
for (size_t i = 0, e = ExtractRegExpGlobals.size(); i != e; ++i) {
std::string Error;
Regex RegEx(ExtractRegExpGlobals[i]);
if (!RegEx.isValid(Error)) {
errs() << argv[0] << ": '" << ExtractRegExpGlobals[i] << "' "
"invalid regex: " << Error;
}
bool match = false;
for (Module::global_iterator GV = M.get()->global_begin(),
E = M.get()->global_end(); GV != E; GV++) {
if (RegEx.match(GV->getName())) {
GVs.insert(&*GV);
match = true;
}
}
if (!match) {
errs() << argv[0] << ": program doesn't contain global named '"
<< ExtractRegExpGlobals[i] << "'!\n";
return 1;
}
}
// Figure out which functions we should extract.
for (size_t i = 0, e = ExtractFuncs.size(); i != e; ++i) {
GlobalValue *GV = M.get()->getFunction(ExtractFuncs[i]);
if (!GV) {
errs() << argv[0] << ": program doesn't contain function named '"
<< ExtractFuncs[i] << "'!\n";
return 1;
}
GVs.insert(GV);
}
// Extract functions via regular expression matching.
for (size_t i = 0, e = ExtractRegExpFuncs.size(); i != e; ++i) {
std::string Error;
StringRef RegExStr = ExtractRegExpFuncs[i];
Regex RegEx(RegExStr);
if (!RegEx.isValid(Error)) {
errs() << argv[0] << ": '" << ExtractRegExpFuncs[i] << "' "
"invalid regex: " << Error;
}
bool match = false;
for (Module::iterator F = M.get()->begin(), E = M.get()->end(); F != E;
F++) {
if (RegEx.match(F->getName())) {
GVs.insert(&*F);
match = true;
}
}
if (!match) {
errs() << argv[0] << ": program doesn't contain global named '"
<< ExtractRegExpFuncs[i] << "'!\n";
return 1;
}
}
// Materialize requisite global values.
if (!DeleteFn)
for (size_t i = 0, e = GVs.size(); i != e; ++i) {
GlobalValue *GV = GVs[i];
if (GV->isMaterializable()) {
std::string ErrInfo;
if (GV->Materialize(&ErrInfo)) {
errs() << argv[0] << ": error reading input: " << ErrInfo << "\n";
return 1;
}
}
}
else {
// Deleting. Materialize every GV that's *not* in GVs.
SmallPtrSet<GlobalValue *, 8> GVSet(GVs.begin(), GVs.end());
for (Module::global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) {
GlobalVariable *G = I;
if (!GVSet.count(G) && G->isMaterializable()) {
std::string ErrInfo;
if (G->Materialize(&ErrInfo)) {
errs() << argv[0] << ": error reading input: " << ErrInfo << "\n";
return 1;
}
}
}
for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I) {
Function *F = I;
if (!GVSet.count(F) && F->isMaterializable()) {
std::string ErrInfo;
if (F->Materialize(&ErrInfo)) {
errs() << argv[0] << ": error reading input: " << ErrInfo << "\n";
return 1;
}
}
}
}
// In addition to deleting all other functions, we also want to spiff it
// up a little bit. Do this now.
PassManager Passes;
Passes.add(new TargetData(M.get())); // Use correct TargetData
std::vector<GlobalValue*> Gvs(GVs.begin(), GVs.end());
Passes.add(createGVExtractionPass(Gvs, DeleteFn));
if (!DeleteFn)
Passes.add(createGlobalDCEPass()); // Delete unreachable globals
Passes.add(createStripDeadDebugInfoPass()); // Remove dead debug info
Passes.add(createStripDeadPrototypesPass()); // Remove dead func decls
std::string ErrorInfo;
tool_output_file Out(OutputFilename.c_str(), ErrorInfo,
raw_fd_ostream::F_Binary);
if (!ErrorInfo.empty()) {
errs() << ErrorInfo << '\n';
return 1;
}
if (OutputAssembly)
Passes.add(createPrintModulePass(&Out.os()));
else if (Force || !CheckBitcodeOutputToConsole(Out.os(), true))
Passes.add(createBitcodeWriterPass(Out.os()));
Passes.run(*M.get());
// Declare success.
Out.keep();
return 0;
}
