92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
#include "llvm/Bitcode/ReaderWriter.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/ErrorOr.h"
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#include "llvm/Support/ToolOutputFile.h"
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#include "llvm/Config/llvm-config.h"
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#include <system_error>
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using namespace llvm;
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static cl::opt<std::string>
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InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
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static cl::opt<std::string>
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OutputFilename("o", cl::desc("Output filename"),
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cl::value_desc("filename"));
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int main(int argc, char **argv) {
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LLVMContext &Context = getGlobalContext();
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llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
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cl::ParseCommandLineOptions(argc, argv, "libclc builtin preparation tool\n");
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std::string ErrorMessage;
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Module *M = nullptr;
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{
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ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
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MemoryBuffer::getFile(InputFilename);
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std::unique_ptr<MemoryBuffer> &BufferPtr = BufferOrErr.get();
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if (std::error_code ec = BufferOrErr.getError())
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ErrorMessage = ec.message();
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else {
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ErrorOr<std::unique_ptr<Module>> ModuleOrErr =
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parseBitcodeFile(BufferPtr.get()->getMemBufferRef(), Context);
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if (std::error_code ec = ModuleOrErr.getError())
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ErrorMessage = ec.message();
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M = ModuleOrErr.get().release();
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}
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}
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if (!M) {
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errs() << argv[0] << ": ";
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if (ErrorMessage.size())
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errs() << ErrorMessage << "\n";
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else
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errs() << "bitcode didn't read correctly.\n";
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return 1;
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}
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// Set linkage of every external definition to linkonce_odr.
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for (Module::iterator i = M->begin(), e = M->end(); i != e; ++i) {
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if (!i->isDeclaration() && i->getLinkage() == GlobalValue::ExternalLinkage)
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i->setLinkage(GlobalValue::LinkOnceODRLinkage);
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}
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for (Module::global_iterator i = M->global_begin(), e = M->global_end();
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i != e; ++i) {
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if (!i->isDeclaration() && i->getLinkage() == GlobalValue::ExternalLinkage)
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i->setLinkage(GlobalValue::LinkOnceODRLinkage);
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}
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if (OutputFilename.empty()) {
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errs() << "no output file\n";
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return 1;
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}
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std::error_code EC;
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std::unique_ptr<tool_output_file> Out
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(new tool_output_file(OutputFilename, EC, sys::fs::F_None));
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if (EC) {
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errs() << EC.message() << '\n';
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exit(1);
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}
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WriteBitcodeToFile(M, Out->os());
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// Declare success.
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Out->keep();
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return 0;
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}
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