1 //===-- llvm/LinkTimeOptimizer.h - LTO Public C Interface -------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This header provides a C API to use the LLVM link time optimization
11 // library. This is intended to be used by linkers which are C-only in
12 // their implementation for performing LTO.
14 //===----------------------------------------------------------------------===//
16 #ifndef __LTO_CAPI_H__
17 #define __LTO_CAPI_H__
24 * @defgroup LLVMCLinkTimeOptimizer Link Time Optimization
30 /// This provides a dummy type for pointers to the LTO object.
31 typedef void* llvm_lto_t;
33 /// This provides a C-visible enumerator to manage status codes.
34 /// This should map exactly onto the C++ enumerator LTOStatus.
35 typedef enum llvm_lto_status {
38 LLVM_LTO_READ_SUCCESS,
39 LLVM_LTO_READ_FAILURE,
40 LLVM_LTO_WRITE_FAILURE,
43 LLVM_LTO_MODULE_MERGE_FAILURE,
46 // Added C-specific error codes
50 /// This provides C interface to initialize link time optimizer. This allows
51 /// linker to use dlopen() interface to dynamically load LinkTimeOptimizer.
52 /// extern "C" helps, because dlopen() interface uses name to find the symbol.
53 extern llvm_lto_t llvm_create_optimizer(void);
54 extern void llvm_destroy_optimizer(llvm_lto_t lto);
56 extern llvm_lto_status_t llvm_read_object_file
57 (llvm_lto_t lto, const char* input_filename);
58 extern llvm_lto_status_t llvm_optimize_modules
59 (llvm_lto_t lto, const char* output_filename);