//===-- llvm/LinkTimeOptimizer.h - LTO Public C Interface -------*- C++ -*-===//

//

//                     The LLVM Compiler Infrastructure

//

// This file is distributed under the University of Illinois Open Source

// License. See LICENSE.TXT for details.

// 

//===----------------------------------------------------------------------===//

//

// This header provides a C API to use the LLVM link time optimization

// library. This is inteded to be used by linkers which are C-only in

// their implementation for performing LTO.

//

//===----------------------------------------------------------------------===//

#ifndef __LTO_CAPI_H__

#define __LTO_CAPI_H__

#ifdef __cplusplus

extern "C" {

#endif

  /// This provides a dummy type for pointers to the LTO object.

  typedef void* llvm_lto_t;

  /// This provides a C-visible enumerator to manage status codes.

  /// This should map exactly onto the C++ enumerator LTOStatus.

  typedef enum llvm_lto_status {

    LLVM_LTO_UNKNOWN,

    LLVM_LTO_OPT_SUCCESS,

    LLVM_LTO_READ_SUCCESS,

    LLVM_LTO_READ_FAILURE,

    LLVM_LTO_WRITE_FAILURE,

    LLVM_LTO_NO_TARGET,

    LLVM_LTO_NO_WORK,

    LLVM_LTO_MODULE_MERGE_FAILURE,

    LLVM_LTO_ASM_FAILURE,

    //  Added C-specific error codes

    LLVM_LTO_NULL_OBJECT

  } llvm_lto_status_t;

  /// This provides C interface to initialize link time optimizer. This allows

  /// linker to use dlopen() interface to dynamically load LinkTimeOptimizer.

  /// extern "C" helps, because dlopen() interface uses name to find the symbol.

  extern llvm_lto_t llvm_create_optimizer(void);

  extern void llvm_destroy_optimizer(llvm_lto_t lto);

  extern llvm_lto_status_t llvm_read_object_file

    (llvm_lto_t lto, const char* input_filename);

  extern llvm_lto_status_t llvm_optimize_modules

    (llvm_lto_t lto, const char* output_filename);

#ifdef __cplusplus

}

#endif

#endif