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#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Config/llvm-config.h"
#include <system_error>
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;
Module *M = nullptr;
{
ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
MemoryBuffer::getFile(InputFilename);
std::unique_ptr<MemoryBuffer> &BufferPtr = BufferOrErr.get();
if (std::error_code ec = BufferOrErr.getError())
ErrorMessage = ec.message();
else {
ErrorOr<std::unique_ptr<Module>> ModuleOrErr =
parseBitcodeFile(BufferPtr.get()->getMemBufferRef(), Context);
if (std::error_code ec = ModuleOrErr.getError())
ErrorMessage = ec.message();
M = ModuleOrErr.get().release();
}
}
if (!M) {
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::error_code EC;
std::unique_ptr<tool_output_file> Out
(new tool_output_file(OutputFilename, EC, sys::fs::F_None));
if (EC) {
errs() << EC.message() << '\n';
exit(1);
}
WriteBitcodeToFile(M, Out->os());
// Declare success.
Out->keep();
return 0;
}
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