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//===-- llvm/LinkTimeOptimizer.h - LTO Public C Interface -------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This header provides a C API to use the LLVM link time optimization
// library. This is intended to be used by linkers which are C-only in
// their implementation for performing LTO.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_C_LINKTIMEOPTIMIZER_H
#define LLVM_C_LINKTIMEOPTIMIZER_H
#include "llvm-c/ExternC.h"
LLVM_C_EXTERN_C_BEGIN
/**
* @defgroup LLVMCLinkTimeOptimizer Link Time Optimization
* @ingroup LLVMC
*
* @{
*/
/// 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);
/**
* @}
*/
LLVM_C_EXTERN_C_END
#endif
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