Method LoadPreCompiledIR

cpp/src/gandiva/engine.cc:407–428

Handling for pre-compiled IR libraries.

// Handling for pre-compiled IR libraries.
Status Engine::LoadPreCompiledIR() {
  const auto bitcode = llvm::StringRef(reinterpret_cast<const char*>(kPrecompiledBitcode),
                                       kPrecompiledBitcodeSize);

  /// Read from file into memory buffer.
  llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer_or_error =
      llvm::MemoryBuffer::getMemBuffer(bitcode, "precompiled", false);

  ARROW_RETURN_IF(!buffer_or_error,
                  Status::CodeGenError("Could not load module from IR: ",
                                       buffer_or_error.getError().message()));

  std::unique_ptr<llvm::MemoryBuffer> buffer = std::move(buffer_or_error.get());

  /// Parse the IR module.
  llvm::Expected<std::unique_ptr<llvm::Module>> module_or_error =
      llvm::getOwningLazyBitcodeModule(std::move(buffer), *context());
  // NOTE: llvm::handleAllErrors() fails linking with RTTI-disabled LLVM builds
  // (ARROW-5148)
  ARROW_RETURN_NOT_OK(VerifyAndLinkModule(*module_, std::move(module_or_error)));
  return Status::OK();
}

static llvm::MemoryBufferRef AsLLVMMemoryBuffer(const arrow::Buffer& arrow_buffer) {
  const auto data = reinterpret_cast<const char*>(arrow_buffer.data());