llvm.org GIT mirror llvm / release_34 include / llvm-c / lto.h
release_34

Tree @release_34 (Download .tar.gz)

lto.h @release_34

77595fc
 
 
 
 
 
 
 
 
 
 
 
 
 
 
674be02
 
77595fc
 
e8a665f
77595fc
07d5aef
 
 
 
 
c7ef7c2
 
 
07d5aef
 
 
 
 
 
6244b51
 
 
 
 
 
 
4389009
cbad586
77595fc
7afea0c
168f142
 
 
 
 
 
 
 
 
7afea0c
168f142
 
 
 
7afea0c
 
77595fc
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
16c1f44
77595fc
 
 
7a2bdde
77595fc
 
16c1f44
77595fc
 
 
 
07d5aef
77595fc
 
 
 
 
 
07d5aef
168f142
b454eab
77595fc
 
 
 
 
07d5aef
77595fc
 
 
 
 
 
07d5aef
168f142
ca3ca13
77595fc
 
 
 
 
 
 
0e7a546
77595fc
 
 
 
 
 
 
0e7a546
77595fc
b4cc031
 
 
 
 
f21b105
 
 
 
 
 
 
 
 
b4cc031
77595fc
 
 
 
 
 
 
 
 
 
 
 
 
 
 
cbb170d
 
 
 
 
 
77595fc
 
 
 
6a6623c
77595fc
 
 
 
 
 
 
6a6623c
77595fc
 
 
 
 
 
6a6623c
77595fc
 
 
 
 
 
 
0e7a546
77595fc
 
 
 
 
 
 
 
 
 
 
 
 
 
 
07d5aef
77595fc
 
 
 
 
 
 
 
07d5aef
77595fc
 
 
 
 
 
 
07d5aef
77595fc
 
 
 
2d643ef
 
 
 
 
 
 
cbad586
 
 
 
 
 
98197e5
 
 
 
 
 
cbad586
 
4389009
 
77595fc
 
 
 
 
 
 
 
 
07d5aef
77595fc
 
 
 
7a2bdde
168f142
ef194ed
 
77595fc
 
ef194ed
77595fc
 
6421a88
 
 
 
07d5aef
6421a88
 
77595fc
a93ae71
 
 
 
 
168f142
8a2ce5d
 
 
 
 
 
 
77595fc
 
 
 
6244b51
 
 
77595fc
 
/*===-- llvm-c/lto.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 public interface to an abstract link time optimization*|
|* library.  LLVM provides an implementation of this interface for use with   *|
|* llvm bitcode files.                                                        *|
|*                                                                            *|
\*===----------------------------------------------------------------------===*/

#ifndef LLVM_C_LTO_H
#define LLVM_C_LTO_H

#include <stddef.h>
#include <sys/types.h>

#ifndef __cplusplus
#if !defined(_MSC_VER)
#include <stdbool.h>
typedef bool lto_bool_t;
#else
/* MSVC in particular does not have anything like _Bool or bool in C, but we can
   at least make sure the type is the same size.  The implementation side will
   use C++ bool. */
typedef unsigned char lto_bool_t;
#endif
#else
typedef bool lto_bool_t;
#endif

/**
 * @defgroup LLVMCLTO LTO
 * @ingroup LLVMC
 *
 * @{
 */

#define LTO_API_VERSION 5

typedef enum {
    LTO_SYMBOL_ALIGNMENT_MASK              = 0x0000001F, /* log2 of alignment */
    LTO_SYMBOL_PERMISSIONS_MASK            = 0x000000E0,
    LTO_SYMBOL_PERMISSIONS_CODE            = 0x000000A0,
    LTO_SYMBOL_PERMISSIONS_DATA            = 0x000000C0,
    LTO_SYMBOL_PERMISSIONS_RODATA          = 0x00000080,
    LTO_SYMBOL_DEFINITION_MASK             = 0x00000700,
    LTO_SYMBOL_DEFINITION_REGULAR          = 0x00000100,
    LTO_SYMBOL_DEFINITION_TENTATIVE        = 0x00000200,
    LTO_SYMBOL_DEFINITION_WEAK             = 0x00000300,
    LTO_SYMBOL_DEFINITION_UNDEFINED        = 0x00000400,
    LTO_SYMBOL_DEFINITION_WEAKUNDEF        = 0x00000500,
    LTO_SYMBOL_SCOPE_MASK                  = 0x00003800,
    LTO_SYMBOL_SCOPE_INTERNAL              = 0x00000800,
    LTO_SYMBOL_SCOPE_HIDDEN                = 0x00001000,
    LTO_SYMBOL_SCOPE_PROTECTED             = 0x00002000,
    LTO_SYMBOL_SCOPE_DEFAULT               = 0x00001800,
    LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN = 0x00002800
} lto_symbol_attributes;

typedef enum {
    LTO_DEBUG_MODEL_NONE         = 0,
    LTO_DEBUG_MODEL_DWARF        = 1
} lto_debug_model;

typedef enum {
    LTO_CODEGEN_PIC_MODEL_STATIC         = 0,
    LTO_CODEGEN_PIC_MODEL_DYNAMIC        = 1,
    LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC = 2
} lto_codegen_model;


/** opaque reference to a loaded object module */
typedef struct LTOModule*         lto_module_t;

/** opaque reference to a code generator */
typedef struct LTOCodeGenerator*  lto_code_gen_t;

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Returns a printable string.
 */
extern const char*
lto_get_version(void);


/**
 * Returns the last error string or NULL if last operation was successful.
 */
extern const char*
lto_get_error_message(void);

/**
 * Checks if a file is a loadable object file.
 */
extern lto_bool_t
lto_module_is_object_file(const char* path);


/**
 * Checks if a file is a loadable object compiled for requested target.
 */
extern lto_bool_t
lto_module_is_object_file_for_target(const char* path,
                                     const char* target_triple_prefix);


/**
 * Checks if a buffer is a loadable object file.
 */
extern lto_bool_t
lto_module_is_object_file_in_memory(const void* mem, size_t length);


/**
 * Checks if a buffer is a loadable object compiled for requested target.
 */
extern lto_bool_t
lto_module_is_object_file_in_memory_for_target(const void* mem, size_t length,
                                              const char* target_triple_prefix);


/**
 * Loads an object file from disk.
 * Returns NULL on error (check lto_get_error_message() for details).
 */
extern lto_module_t
lto_module_create(const char* path);


/**
 * Loads an object file from memory.
 * Returns NULL on error (check lto_get_error_message() for details).
 */
extern lto_module_t
lto_module_create_from_memory(const void* mem, size_t length);

/**
 * Loads an object file from disk. The seek point of fd is not preserved.
 * Returns NULL on error (check lto_get_error_message() for details).
 */
extern lto_module_t
lto_module_create_from_fd(int fd, const char *path, size_t file_size);

/**
 * Loads an object file from disk. The seek point of fd is not preserved.
 * Returns NULL on error (check lto_get_error_message() for details).
 */
extern lto_module_t
lto_module_create_from_fd_at_offset(int fd, const char *path, size_t file_size,
                                    size_t map_size, off_t offset);


/**
 * Frees all memory internally allocated by the module.
 * Upon return the lto_module_t is no longer valid.
 */
extern void
lto_module_dispose(lto_module_t mod);


/**
 * Returns triple string which the object module was compiled under.
 */
extern const char*
lto_module_get_target_triple(lto_module_t mod);

/**
 * Sets triple string with which the object will be codegened.
 */
extern void
lto_module_set_target_triple(lto_module_t mod, const char *triple);


/**
 * Returns the number of symbols in the object module.
 */
extern unsigned int
lto_module_get_num_symbols(lto_module_t mod);


/**
 * Returns the name of the ith symbol in the object module.
 */
extern const char*
lto_module_get_symbol_name(lto_module_t mod, unsigned int index);


/**
 * Returns the attributes of the ith symbol in the object module.
 */
extern lto_symbol_attributes
lto_module_get_symbol_attribute(lto_module_t mod, unsigned int index);


/**
 * Instantiates a code generator.
 * Returns NULL on error (check lto_get_error_message() for details).
 */
extern lto_code_gen_t
lto_codegen_create(void);


/**
 * Frees all code generator and all memory it internally allocated.
 * Upon return the lto_code_gen_t is no longer valid.
 */
extern void
lto_codegen_dispose(lto_code_gen_t);



/**
 * Add an object module to the set of modules for which code will be generated.
 * Returns true on error (check lto_get_error_message() for details).
 */
extern lto_bool_t
lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod);



/**
 * Sets if debug info should be generated.
 * Returns true on error (check lto_get_error_message() for details).
 */
extern lto_bool_t
lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model);


/**
 * Sets which PIC code model to generated.
 * Returns true on error (check lto_get_error_message() for details).
 */
extern lto_bool_t
lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model);


/**
 * Sets the cpu to generate code for.
 */
extern void
lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu);


/**
 * Sets the location of the assembler tool to run. If not set, libLTO
 * will use gcc to invoke the assembler.
 */
extern void
lto_codegen_set_assembler_path(lto_code_gen_t cg, const char* path);

/**
 * Sets extra arguments that libLTO should pass to the assembler.
 */
extern void
lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
                               int nargs);

/**
 * Tells LTO optimization passes that this symbol must be preserved
 * because it is referenced by native code or a command line option.
 */
extern void
lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg, const char* symbol);

/**
 * Writes a new object file at the specified path that contains the
 * merged contents of all modules added so far.
 * Returns true on error (check lto_get_error_message() for details).
 */
extern lto_bool_t
lto_codegen_write_merged_modules(lto_code_gen_t cg, const char* path);

/**
 * Generates code for all added modules into one native object file.
 * On success returns a pointer to a generated mach-o/ELF buffer and
 * length set to the buffer size.  The buffer is owned by the
 * lto_code_gen_t and will be freed when lto_codegen_dispose()
 * is called, or lto_codegen_compile() is called again.
 * On failure, returns NULL (check lto_get_error_message() for details).
 */
extern const void*
lto_codegen_compile(lto_code_gen_t cg, size_t* length);

/**
 * Generates code for all added modules into one native object file.
 * The name of the file is written to name. Returns true on error.
 */
extern lto_bool_t
lto_codegen_compile_to_file(lto_code_gen_t cg, const char** name);


/**
 * Sets options to help debug codegen bugs.
 */
extern void
lto_codegen_debug_options(lto_code_gen_t cg, const char *);

/**
 * Initializes LLVM disassemblers.
 * FIXME: This doesn't really belong here.
 */
extern void
lto_initialize_disassembler(void);

#ifdef __cplusplus
}
#endif

/**
 * @}
 */

#endif