1 /*===-- llvm-c/lto.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 public interface to an abstract link time optimization*|
11 |* library. LLVM provides an implementation of this interface for use with *|
12 |* llvm bitcode files. *|
14 \*===----------------------------------------------------------------------===*/
20 #include <sys/types.h>
23 #if !defined(_MSC_VER)
25 typedef bool lto_bool_t;
27 /* MSVC in particular does not have anything like _Bool or bool in C, but we can
28 at least make sure the type is the same size. The implementation side will
30 typedef unsigned char lto_bool_t;
33 typedef bool lto_bool_t;
37 * @defgroup LLVMCLTO LTO
43 #define LTO_API_VERSION 11
46 * \since prior to LTO_API_VERSION=3
49 LTO_SYMBOL_ALIGNMENT_MASK = 0x0000001F, /* log2 of alignment */
50 LTO_SYMBOL_PERMISSIONS_MASK = 0x000000E0,
51 LTO_SYMBOL_PERMISSIONS_CODE = 0x000000A0,
52 LTO_SYMBOL_PERMISSIONS_DATA = 0x000000C0,
53 LTO_SYMBOL_PERMISSIONS_RODATA = 0x00000080,
54 LTO_SYMBOL_DEFINITION_MASK = 0x00000700,
55 LTO_SYMBOL_DEFINITION_REGULAR = 0x00000100,
56 LTO_SYMBOL_DEFINITION_TENTATIVE = 0x00000200,
57 LTO_SYMBOL_DEFINITION_WEAK = 0x00000300,
58 LTO_SYMBOL_DEFINITION_UNDEFINED = 0x00000400,
59 LTO_SYMBOL_DEFINITION_WEAKUNDEF = 0x00000500,
60 LTO_SYMBOL_SCOPE_MASK = 0x00003800,
61 LTO_SYMBOL_SCOPE_INTERNAL = 0x00000800,
62 LTO_SYMBOL_SCOPE_HIDDEN = 0x00001000,
63 LTO_SYMBOL_SCOPE_PROTECTED = 0x00002000,
64 LTO_SYMBOL_SCOPE_DEFAULT = 0x00001800,
65 LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN = 0x00002800
66 } lto_symbol_attributes;
69 * \since prior to LTO_API_VERSION=3
72 LTO_DEBUG_MODEL_NONE = 0,
73 LTO_DEBUG_MODEL_DWARF = 1
77 * \since prior to LTO_API_VERSION=3
80 LTO_CODEGEN_PIC_MODEL_STATIC = 0,
81 LTO_CODEGEN_PIC_MODEL_DYNAMIC = 1,
82 LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC = 2,
83 LTO_CODEGEN_PIC_MODEL_DEFAULT = 3
86 /** opaque reference to a loaded object module */
87 typedef struct LTOModule* lto_module_t;
89 /** opaque reference to a code generator */
90 typedef struct LTOCodeGenerator* lto_code_gen_t;
97 * Returns a printable string.
99 * \since prior to LTO_API_VERSION=3
102 lto_get_version(void);
106 * Returns the last error string or NULL if last operation was successful.
108 * \since prior to LTO_API_VERSION=3
111 lto_get_error_message(void);
114 * Checks if a file is a loadable object file.
116 * \since prior to LTO_API_VERSION=3
119 lto_module_is_object_file(const char* path);
123 * Checks if a file is a loadable object compiled for requested target.
125 * \since prior to LTO_API_VERSION=3
128 lto_module_is_object_file_for_target(const char* path,
129 const char* target_triple_prefix);
133 * Checks if a buffer is a loadable object file.
135 * \since prior to LTO_API_VERSION=3
138 lto_module_is_object_file_in_memory(const void* mem, size_t length);
142 * Checks if a buffer is a loadable object compiled for requested target.
144 * \since prior to LTO_API_VERSION=3
147 lto_module_is_object_file_in_memory_for_target(const void* mem, size_t length,
148 const char* target_triple_prefix);
152 * Loads an object file from disk.
153 * Returns NULL on error (check lto_get_error_message() for details).
155 * \since prior to LTO_API_VERSION=3
158 lto_module_create(const char* path);
162 * Loads an object file from memory.
163 * Returns NULL on error (check lto_get_error_message() for details).
165 * \since prior to LTO_API_VERSION=3
168 lto_module_create_from_memory(const void* mem, size_t length);
171 * Loads an object file from memory with an extra path argument.
172 * Returns NULL on error (check lto_get_error_message() for details).
174 * \since prior to LTO_API_VERSION=9
177 lto_module_create_from_memory_with_path(const void* mem, size_t length,
181 * Loads an object file from disk. The seek point of fd is not preserved.
182 * Returns NULL on error (check lto_get_error_message() for details).
184 * \since LTO_API_VERSION=5
187 lto_module_create_from_fd(int fd, const char *path, size_t file_size);
190 * Loads an object file from disk. The seek point of fd is not preserved.
191 * Returns NULL on error (check lto_get_error_message() for details).
193 * \since LTO_API_VERSION=5
196 lto_module_create_from_fd_at_offset(int fd, const char *path, size_t file_size,
197 size_t map_size, off_t offset);
200 * Frees all memory internally allocated by the module.
201 * Upon return the lto_module_t is no longer valid.
203 * \since prior to LTO_API_VERSION=3
206 lto_module_dispose(lto_module_t mod);
209 * Returns triple string which the object module was compiled under.
211 * \since prior to LTO_API_VERSION=3
214 lto_module_get_target_triple(lto_module_t mod);
217 * Sets triple string with which the object will be codegened.
219 * \since LTO_API_VERSION=4
222 lto_module_set_target_triple(lto_module_t mod, const char *triple);
226 * Returns the number of symbols in the object module.
228 * \since prior to LTO_API_VERSION=3
231 lto_module_get_num_symbols(lto_module_t mod);
235 * Returns the name of the ith symbol in the object module.
237 * \since prior to LTO_API_VERSION=3
240 lto_module_get_symbol_name(lto_module_t mod, unsigned int index);
244 * Returns the attributes of the ith symbol in the object module.
246 * \since prior to LTO_API_VERSION=3
248 extern lto_symbol_attributes
249 lto_module_get_symbol_attribute(lto_module_t mod, unsigned int index);
253 * Returns the number of dependent libraries in the object module.
255 * \since LTO_API_VERSION=8
258 lto_module_get_num_deplibs(lto_module_t mod);
262 * Returns the ith dependent library in the module.
264 * \since LTO_API_VERSION=8
267 lto_module_get_deplib(lto_module_t mod, unsigned int index);
271 * Returns the number of linker options in the object module.
273 * \since LTO_API_VERSION=8
276 lto_module_get_num_linkeropts(lto_module_t mod);
280 * Returns the ith linker option in the module.
282 * \since LTO_API_VERSION=8
285 lto_module_get_linkeropt(lto_module_t mod, unsigned int index);
289 * Diagnostic severity.
291 * \since LTO_API_VERSION=7
296 LTO_DS_REMARK = 3, // Added in LTO_API_VERSION=10.
298 } lto_codegen_diagnostic_severity_t;
301 * Diagnostic handler type.
302 * \p severity defines the severity.
303 * \p diag is the actual diagnostic.
304 * The diagnostic is not prefixed by any of severity keyword, e.g., 'error: '.
305 * \p ctxt is used to pass the context set with the diagnostic handler.
307 * \since LTO_API_VERSION=7
309 typedef void (*lto_diagnostic_handler_t)(
310 lto_codegen_diagnostic_severity_t severity, const char *diag, void *ctxt);
313 * Set a diagnostic handler and the related context (void *).
314 * This is more general than lto_get_error_message, as the diagnostic handler
315 * can be called at anytime within lto.
317 * \since LTO_API_VERSION=7
319 extern void lto_codegen_set_diagnostic_handler(lto_code_gen_t,
320 lto_diagnostic_handler_t,
324 * Instantiates a code generator.
325 * Returns NULL on error (check lto_get_error_message() for details).
327 * \since prior to LTO_API_VERSION=3
329 extern lto_code_gen_t
330 lto_codegen_create(void);
333 * Frees all code generator and all memory it internally allocated.
334 * Upon return the lto_code_gen_t is no longer valid.
336 * \since prior to LTO_API_VERSION=3
339 lto_codegen_dispose(lto_code_gen_t);
342 * Add an object module to the set of modules for which code will be generated.
343 * Returns true on error (check lto_get_error_message() for details).
345 * \since prior to LTO_API_VERSION=3
348 lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod);
351 * Sets if debug info should be generated.
352 * Returns true on error (check lto_get_error_message() for details).
354 * \since prior to LTO_API_VERSION=3
357 lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model);
361 * Sets which PIC code model to generated.
362 * Returns true on error (check lto_get_error_message() for details).
364 * \since prior to LTO_API_VERSION=3
367 lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model);
371 * Sets the cpu to generate code for.
373 * \since LTO_API_VERSION=4
376 lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu);
379 * Sets attributes for the cpu to generate code for.
381 * \since LTO_API_VERSION=11
384 lto_codegen_set_attr(lto_code_gen_t cg, const char *attr);
388 * Sets the location of the assembler tool to run. If not set, libLTO
389 * will use gcc to invoke the assembler.
391 * \since LTO_API_VERSION=3
394 lto_codegen_set_assembler_path(lto_code_gen_t cg, const char* path);
397 * Sets extra arguments that libLTO should pass to the assembler.
399 * \since LTO_API_VERSION=4
402 lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
406 * Tells LTO optimization passes that this symbol must be preserved
407 * because it is referenced by native code or a command line option.
409 * \since prior to LTO_API_VERSION=3
412 lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg, const char* symbol);
415 * Writes a new object file at the specified path that contains the
416 * merged contents of all modules added so far.
417 * Returns true on error (check lto_get_error_message() for details).
419 * \since LTO_API_VERSION=5
422 lto_codegen_write_merged_modules(lto_code_gen_t cg, const char* path);
425 * Generates code for all added modules into one native object file.
426 * On success returns a pointer to a generated mach-o/ELF buffer and
427 * length set to the buffer size. The buffer is owned by the
428 * lto_code_gen_t and will be freed when lto_codegen_dispose()
429 * is called, or lto_codegen_compile() is called again.
430 * On failure, returns NULL (check lto_get_error_message() for details).
432 * \since prior to LTO_API_VERSION=3
435 lto_codegen_compile(lto_code_gen_t cg, size_t* length);
438 * Generates code for all added modules into one native object file.
439 * The name of the file is written to name. Returns true on error.
441 * \since LTO_API_VERSION=5
444 lto_codegen_compile_to_file(lto_code_gen_t cg, const char** name);
448 * Sets options to help debug codegen bugs.
450 * \since prior to LTO_API_VERSION=3
453 lto_codegen_debug_options(lto_code_gen_t cg, const char *);
456 * Initializes LLVM disassemblers.
457 * FIXME: This doesn't really belong here.
459 * \since LTO_API_VERSION=5
462 lto_initialize_disassembler(void);