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#include "llvm/ADT/OwningPtr.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Function.h"
#include "llvm/GlobalVariable.h"
#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/system_error.h"
#include "llvm/Support/ToolOutputFile.h"
using namespace llvm;
static cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
static cl::opt<std::string>
OutputFilename("o", cl::desc("Output filename"),
cl::value_desc("filename"));
int main(int argc, char **argv) {
LLVMContext &Context = getGlobalContext();
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, "libclc builtin preparation tool\n");
std::string ErrorMessage;
std::auto_ptr<Module> M;
{
OwningPtr<MemoryBuffer> BufferPtr;
if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFilename, BufferPtr))
ErrorMessage = ec.message();
else
M.reset(ParseBitcodeFile(BufferPtr.get(), Context, &ErrorMessage));
}
if (M.get() == 0) {
errs() << argv[0] << ": ";
if (ErrorMessage.size())
errs() << ErrorMessage << "\n";
else
errs() << "bitcode didn't read correctly.\n";
return 1;
}
// Set linkage of every external definition to linkonce_odr.
for (Module::iterator i = M->begin(), e = M->end(); i != e; ++i) {
if (!i->isDeclaration() && i->getLinkage() == GlobalValue::ExternalLinkage)
i->setLinkage(GlobalValue::LinkOnceODRLinkage);
}
for (Module::global_iterator i = M->global_begin(), e = M->global_end();
i != e; ++i) {
if (!i->isDeclaration() && i->getLinkage() == GlobalValue::ExternalLinkage)
i->setLinkage(GlobalValue::LinkOnceODRLinkage);
}
if (OutputFilename.empty()) {
errs() << "no output file\n";
return 1;
}
std::string ErrorInfo;
OwningPtr<tool_output_file> Out
(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
raw_fd_ostream::F_Binary));
if (!ErrorInfo.empty()) {
errs() << ErrorInfo << '\n';
exit(1);
}
WriteBitcodeToFile(M.get(), Out->os());
// Declare success.
Out->keep();
return 0;
}
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