include/llvm-c/LinkTimeOptimizer.h

   1 //===-- llvm/LinkTimeOptimizer.h - LTO Public C Interface -------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This header provides a C API to use the LLVM link time optimization
  11 // library. This is inteded to be used by linkers which are C-only in
  12 // their implementation for performing LTO.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #ifndef __LTO_CAPI_H__
  17 #define __LTO_CAPI_H__
  18
  19 #ifdef __cplusplus
  20 extern "C" {
  21 #endif
  22
  23   /// This provides a dummy type for pointers to the LTO object.
  24   typedef void* llvm_lto_t;
  25
  26   /// This provides a C-visible enumerator to manage status codes.
  27   /// This should map exactly onto the C++ enumerator LTOStatus.
  28   typedef enum llvm_lto_status {
  29     LLVM_LTO_UNKNOWN,
  30     LLVM_LTO_OPT_SUCCESS,
  31     LLVM_LTO_READ_SUCCESS,
  32     LLVM_LTO_READ_FAILURE,
  33     LLVM_LTO_WRITE_FAILURE,
  34     LLVM_LTO_NO_TARGET,
  35     LLVM_LTO_NO_WORK,
  36     LLVM_LTO_MODULE_MERGE_FAILURE,
  37     LLVM_LTO_ASM_FAILURE,
  38
  39     //  Added C-specific error codes
  40     LLVM_LTO_NULL_OBJECT
  41   } llvm_lto_status_t;
  42
  43   /// This provides C interface to initialize link time optimizer. This allows
  44   /// linker to use dlopen() interface to dynamically load LinkTimeOptimizer.
  45   /// extern "C" helps, because dlopen() interface uses name to find the symbol.
  46   extern llvm_lto_t llvm_create_optimizer(void);
  47   extern void llvm_destroy_optimizer(llvm_lto_t lto);
  48
  49   extern llvm_lto_status_t llvm_read_object_file
  50     (llvm_lto_t lto, const char* input_filename);
  51   extern llvm_lto_status_t llvm_optimize_modules
  52     (llvm_lto_t lto, const char* output_filename);
  53
  54 #ifdef __cplusplus
  55 }
  56 #endif
  57
  58 #endif