WebSVN – QNX 8.QNX8 LLVM/Clang compiler suite – Blame – //llvm-build/x86_64/include/llvm-c/lto.h

Rev	Author	Line No.	Line
14	pmbaty	1	/===-- llvm-c/lto.h - LTO Public C Interface ---------------------- C --===\
		2	\|* *\|
		3	\|* Part of the LLVM Project, under the Apache License v2.0 with LLVM *\|
		4	\|* Exceptions. *\|
		5	\|* See https://llvm.org/LICENSE.txt for license information. *\|
		6	\|* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception *\|
		7	\|* *\|
		8	\|===----------------------------------------------------------------------===\|
		9	\|* *\|
		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. *\|
		13	\|* *\|
		14	\===----------------------------------------------------------------------===/
		15
		16	#ifndef LLVM_C_LTO_H
		17	#define LLVM_C_LTO_H
		18
		19	#include "llvm-c/ExternC.h"
		20
		21	#ifdef __cplusplus
		22	#include <cstddef>
		23	#else
		24	#include <stddef.h>
		25	#endif
		26	#include <sys/types.h>
		27
		28	#ifndef __cplusplus
		29	#if !defined(_MSC_VER)
		30	#include <stdbool.h>
		31	typedef bool lto_bool_t;
		32	#else
		33	/* MSVC in particular does not have anything like _Bool or bool in C, but we can
		34	at least make sure the type is the same size. The implementation side will
		35	use C++ bool. */
		36	typedef unsigned char lto_bool_t;
		37	#endif
		38	#else
		39	typedef bool lto_bool_t;
		40	#endif
		41
		42	/**
		43	* @defgroup LLVMCLTO LTO
		44	* @ingroup LLVMC
		45	*
		46	* @{
		47	*/
		48
		49	#define LTO_API_VERSION 29
		50
		51	/**
		52	* \since prior to LTO_API_VERSION=3
		53	*/
		54	typedef enum {
		55	LTO_SYMBOL_ALIGNMENT_MASK = 0x0000001F, /* log2 of alignment */
		56	LTO_SYMBOL_PERMISSIONS_MASK = 0x000000E0,
		57	LTO_SYMBOL_PERMISSIONS_CODE = 0x000000A0,
		58	LTO_SYMBOL_PERMISSIONS_DATA = 0x000000C0,
		59	LTO_SYMBOL_PERMISSIONS_RODATA = 0x00000080,
		60	LTO_SYMBOL_DEFINITION_MASK = 0x00000700,
		61	LTO_SYMBOL_DEFINITION_REGULAR = 0x00000100,
		62	LTO_SYMBOL_DEFINITION_TENTATIVE = 0x00000200,
		63	LTO_SYMBOL_DEFINITION_WEAK = 0x00000300,
		64	LTO_SYMBOL_DEFINITION_UNDEFINED = 0x00000400,
		65	LTO_SYMBOL_DEFINITION_WEAKUNDEF = 0x00000500,
		66	LTO_SYMBOL_SCOPE_MASK = 0x00003800,
		67	LTO_SYMBOL_SCOPE_INTERNAL = 0x00000800,
		68	LTO_SYMBOL_SCOPE_HIDDEN = 0x00001000,
		69	LTO_SYMBOL_SCOPE_PROTECTED = 0x00002000,
		70	LTO_SYMBOL_SCOPE_DEFAULT = 0x00001800,
		71	LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN = 0x00002800,
		72	LTO_SYMBOL_COMDAT = 0x00004000,
		73	LTO_SYMBOL_ALIAS = 0x00008000
		74	} lto_symbol_attributes;
		75
		76	/**
		77	* \since prior to LTO_API_VERSION=3
		78	*/
		79	typedef enum {
		80	LTO_DEBUG_MODEL_NONE = 0,
		81	LTO_DEBUG_MODEL_DWARF = 1
		82	} lto_debug_model;
		83
		84	/**
		85	* \since prior to LTO_API_VERSION=3
		86	*/
		87	typedef enum {
		88	LTO_CODEGEN_PIC_MODEL_STATIC = 0,
		89	LTO_CODEGEN_PIC_MODEL_DYNAMIC = 1,
		90	LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC = 2,
		91	LTO_CODEGEN_PIC_MODEL_DEFAULT = 3
		92	} lto_codegen_model;
		93
		94	/** opaque reference to a loaded object module */
		95	typedef struct LLVMOpaqueLTOModule *lto_module_t;
		96
		97	/** opaque reference to a code generator */
		98	typedef struct LLVMOpaqueLTOCodeGenerator *lto_code_gen_t;
		99
		100	/** opaque reference to a thin code generator */
		101	typedef struct LLVMOpaqueThinLTOCodeGenerator *thinlto_code_gen_t;
		102
		103	LLVM_C_EXTERN_C_BEGIN
		104
		105	/**
		106	* Returns a printable string.
		107	*
		108	* \since prior to LTO_API_VERSION=3
		109	*/
		110	extern const char*
		111	lto_get_version(void);
		112
		113	/**
		114	* Returns the last error string or NULL if last operation was successful.
		115	*
		116	* \since prior to LTO_API_VERSION=3
		117	*/
		118	extern const char*
		119	lto_get_error_message(void);
		120
		121	/**
		122	* Checks if a file is a loadable object file.
		123	*
		124	* \since prior to LTO_API_VERSION=3
		125	*/
		126	extern lto_bool_t
		127	lto_module_is_object_file(const char* path);
		128
		129	/**
		130	* Checks if a file is a loadable object compiled for requested target.
		131	*
		132	* \since prior to LTO_API_VERSION=3
		133	*/
		134	extern lto_bool_t
		135	lto_module_is_object_file_for_target(const char* path,
		136	const char* target_triple_prefix);
		137
		138	/**
		139	* Return true if \p Buffer contains a bitcode file with ObjC code (category
		140	* or class) in it.
		141	*
		142	* \since LTO_API_VERSION=20
		143	*/
		144	extern lto_bool_t
		145	lto_module_has_objc_category(const void *mem, size_t length);
		146
		147	/**
		148	* Checks if a buffer is a loadable object file.
		149	*
		150	* \since prior to LTO_API_VERSION=3
		151	*/
		152	extern lto_bool_t lto_module_is_object_file_in_memory(const void *mem,
		153	size_t length);
		154
		155	/**
		156	* Checks if a buffer is a loadable object compiled for requested target.
		157	*
		158	* \since prior to LTO_API_VERSION=3
		159	*/
		160	extern lto_bool_t
		161	lto_module_is_object_file_in_memory_for_target(const void* mem, size_t length,
		162	const char* target_triple_prefix);
		163
		164	/**
		165	* Loads an object file from disk.
		166	* Returns NULL on error (check lto_get_error_message() for details).
		167	*
		168	* \since prior to LTO_API_VERSION=3
		169	*/
		170	extern lto_module_t
		171	lto_module_create(const char* path);
		172
		173	/**
		174	* Loads an object file from memory.
		175	* Returns NULL on error (check lto_get_error_message() for details).
		176	*
		177	* \since prior to LTO_API_VERSION=3
		178	*/
		179	extern lto_module_t
		180	lto_module_create_from_memory(const void* mem, size_t length);
		181
		182	/**
		183	* Loads an object file from memory with an extra path argument.
		184	* Returns NULL on error (check lto_get_error_message() for details).
		185	*
		186	* \since LTO_API_VERSION=9
		187	*/
		188	extern lto_module_t
		189	lto_module_create_from_memory_with_path(const void* mem, size_t length,
		190	const char *path);
		191
		192	/**
		193	* Loads an object file in its own context.
		194	*
		195	* Loads an object file in its own LLVMContext. This function call is
		196	* thread-safe. However, modules created this way should not be merged into an
		197	* lto_code_gen_t using \a lto_codegen_add_module().
		198	*
		199	* Returns NULL on error (check lto_get_error_message() for details).
		200	*
		201	* \since LTO_API_VERSION=11
		202	*/
		203	extern lto_module_t
		204	lto_module_create_in_local_context(const void *mem, size_t length,
		205	const char *path);
		206
		207	/**
		208	* Loads an object file in the codegen context.
		209	*
		210	* Loads an object file into the same context as \c cg. The module is safe to
		211	* add using \a lto_codegen_add_module().
		212	*
		213	* Returns NULL on error (check lto_get_error_message() for details).
		214	*
		215	* \since LTO_API_VERSION=11
		216	*/
		217	extern lto_module_t
		218	lto_module_create_in_codegen_context(const void *mem, size_t length,
		219	const char *path, lto_code_gen_t cg);
		220
		221	/**
		222	* Loads an object file from disk. The seek point of fd is not preserved.
		223	* Returns NULL on error (check lto_get_error_message() for details).
		224	*
		225	* \since LTO_API_VERSION=5
		226	*/
		227	extern lto_module_t
		228	lto_module_create_from_fd(int fd, const char *path, size_t file_size);
		229
		230	/**
		231	* Loads an object file from disk. The seek point of fd is not preserved.
		232	* Returns NULL on error (check lto_get_error_message() for details).
		233	*
		234	* \since LTO_API_VERSION=5
		235	*/
		236	extern lto_module_t
		237	lto_module_create_from_fd_at_offset(int fd, const char *path, size_t file_size,
		238	size_t map_size, off_t offset);
		239
		240	/**
		241	* Frees all memory internally allocated by the module.
		242	* Upon return the lto_module_t is no longer valid.
		243	*
		244	* \since prior to LTO_API_VERSION=3
		245	*/
		246	extern void
		247	lto_module_dispose(lto_module_t mod);
		248
		249	/**
		250	* Returns triple string which the object module was compiled under.
		251	*
		252	* \since prior to LTO_API_VERSION=3
		253	*/
		254	extern const char*
		255	lto_module_get_target_triple(lto_module_t mod);
		256
		257	/**
		258	* Sets triple string with which the object will be codegened.
		259	*
		260	* \since LTO_API_VERSION=4
		261	*/
		262	extern void
		263	lto_module_set_target_triple(lto_module_t mod, const char *triple);
		264
		265	/**
		266	* Returns the number of symbols in the object module.
		267	*
		268	* \since prior to LTO_API_VERSION=3
		269	*/
		270	extern unsigned int
		271	lto_module_get_num_symbols(lto_module_t mod);
		272
		273	/**
		274	* Returns the name of the ith symbol in the object module.
		275	*
		276	* \since prior to LTO_API_VERSION=3
		277	*/
		278	extern const char*
		279	lto_module_get_symbol_name(lto_module_t mod, unsigned int index);
		280
		281	/**
		282	* Returns the attributes of the ith symbol in the object module.
		283	*
		284	* \since prior to LTO_API_VERSION=3
		285	*/
		286	extern lto_symbol_attributes
		287	lto_module_get_symbol_attribute(lto_module_t mod, unsigned int index);
		288
		289	/**
		290	* Returns the module's linker options.
		291	*
		292	* The linker options may consist of multiple flags. It is the linker's
		293	* responsibility to split the flags using a platform-specific mechanism.
		294	*
		295	* \since LTO_API_VERSION=16
		296	*/
		297	extern const char*
		298	lto_module_get_linkeropts(lto_module_t mod);
		299
		300	/**
		301	* If targeting mach-o on darwin, this function gets the CPU type and subtype
		302	* that will end up being encoded in the mach-o header. These are the values
		303	* that can be found in mach/machine.h.
		304	*
		305	* \p out_cputype and \p out_cpusubtype must be non-NULL.
		306	*
		307	* Returns true on error (check lto_get_error_message() for details).
		308	*
		309	* \since LTO_API_VERSION=27
		310	*/
		311	extern lto_bool_t lto_module_get_macho_cputype(lto_module_t mod,
		312	unsigned int *out_cputype,
		313	unsigned int *out_cpusubtype);
		314
		315	/**
		316	* This function can be used by the linker to check if a given module has
		317	* any constructor or destructor functions.
		318	*
		319	* Returns true if the module has either the @llvm.global_ctors or the
		320	* @llvm.global_dtors symbol. Otherwise returns false.
		321	*
		322	* \since LTO_API_VERSION=29
		323	*/
		324	extern lto_bool_t lto_module_has_ctor_dtor(lto_module_t mod);
		325	/**
		326	* Diagnostic severity.
		327	*
		328	* \since LTO_API_VERSION=7
		329	*/
		330	typedef enum {
		331	LTO_DS_ERROR = 0,
		332	LTO_DS_WARNING = 1,
		333	LTO_DS_REMARK = 3, // Added in LTO_API_VERSION=10.
		334	LTO_DS_NOTE = 2
		335	} lto_codegen_diagnostic_severity_t;
		336
		337	/**
		338	* Diagnostic handler type.
		339	* \p severity defines the severity.
		340	* \p diag is the actual diagnostic.
		341	* The diagnostic is not prefixed by any of severity keyword, e.g., 'error: '.
		342	* \p ctxt is used to pass the context set with the diagnostic handler.
		343	*
		344	* \since LTO_API_VERSION=7
		345	*/
		346	typedef void (*lto_diagnostic_handler_t)(
		347	lto_codegen_diagnostic_severity_t severity, const char diag, void ctxt);
		348
		349	/**
		350	* Set a diagnostic handler and the related context (void *).
		351	* This is more general than lto_get_error_message, as the diagnostic handler
		352	* can be called at anytime within lto.
		353	*
		354	* \since LTO_API_VERSION=7
		355	*/
		356	extern void lto_codegen_set_diagnostic_handler(lto_code_gen_t,
		357	lto_diagnostic_handler_t,
		358	void *);
		359
		360	/**
		361	* Instantiates a code generator.
		362	* Returns NULL on error (check lto_get_error_message() for details).
		363	*
		364	* All modules added using \a lto_codegen_add_module() must have been created
		365	* in the same context as the codegen.
		366	*
		367	* \since prior to LTO_API_VERSION=3
		368	*/
		369	extern lto_code_gen_t
		370	lto_codegen_create(void);
		371
		372	/**
		373	* Instantiate a code generator in its own context.
		374	*
		375	* Instantiates a code generator in its own context. Modules added via \a
		376	* lto_codegen_add_module() must have all been created in the same context,
		377	* using \a lto_module_create_in_codegen_context().
		378	*
		379	* \since LTO_API_VERSION=11
		380	*/
		381	extern lto_code_gen_t
		382	lto_codegen_create_in_local_context(void);
		383
		384	/**
		385	* Frees all code generator and all memory it internally allocated.
		386	* Upon return the lto_code_gen_t is no longer valid.
		387	*
		388	* \since prior to LTO_API_VERSION=3
		389	*/
		390	extern void
		391	lto_codegen_dispose(lto_code_gen_t);
		392
		393	/**
		394	* Add an object module to the set of modules for which code will be generated.
		395	* Returns true on error (check lto_get_error_message() for details).
		396	*
		397	* \c cg and \c mod must both be in the same context. See \a
		398	* lto_codegen_create_in_local_context() and \a
		399	* lto_module_create_in_codegen_context().
		400	*
		401	* \since prior to LTO_API_VERSION=3
		402	*/
		403	extern lto_bool_t
		404	lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod);
		405
		406	/**
		407	* Sets the object module for code generation. This will transfer the ownership
		408	* of the module to the code generator.
		409	*
		410	* \c cg and \c mod must both be in the same context.
		411	*
		412	* \since LTO_API_VERSION=13
		413	*/
		414	extern void
		415	lto_codegen_set_module(lto_code_gen_t cg, lto_module_t mod);
		416
		417	/**
		418	* Sets if debug info should be generated.
		419	* Returns true on error (check lto_get_error_message() for details).
		420	*
		421	* \since prior to LTO_API_VERSION=3
		422	*/
		423	extern lto_bool_t
		424	lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model);
		425
		426	/**
		427	* Sets which PIC code model to generated.
		428	* Returns true on error (check lto_get_error_message() for details).
		429	*
		430	* \since prior to LTO_API_VERSION=3
		431	*/
		432	extern lto_bool_t
		433	lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model);
		434
		435	/**
		436	* Sets the cpu to generate code for.
		437	*
		438	* \since LTO_API_VERSION=4
		439	*/
		440	extern void
		441	lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu);
		442
		443	/**
		444	* Sets the location of the assembler tool to run. If not set, libLTO
		445	* will use gcc to invoke the assembler.
		446	*
		447	* \since LTO_API_VERSION=3
		448	*/
		449	extern void
		450	lto_codegen_set_assembler_path(lto_code_gen_t cg, const char* path);
		451
		452	/**
		453	* Sets extra arguments that libLTO should pass to the assembler.
		454	*
		455	* \since LTO_API_VERSION=4
		456	*/
		457	extern void
		458	lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
		459	int nargs);
		460
		461	/**
		462	* Adds to a list of all global symbols that must exist in the final generated
		463	* code. If a function is not listed there, it might be inlined into every usage
		464	* and optimized away.
		465	*
		466	* \since prior to LTO_API_VERSION=3
		467	*/
		468	extern void
		469	lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg, const char* symbol);
		470
		471	/**
		472	* Writes a new object file at the specified path that contains the
		473	* merged contents of all modules added so far.
		474	* Returns true on error (check lto_get_error_message() for details).
		475	*
		476	* \since LTO_API_VERSION=5
		477	*/
		478	extern lto_bool_t
		479	lto_codegen_write_merged_modules(lto_code_gen_t cg, const char* path);
		480
		481	/**
		482	* Generates code for all added modules into one native object file.
		483	* This calls lto_codegen_optimize then lto_codegen_compile_optimized.
		484	*
		485	* On success returns a pointer to a generated mach-o/ELF buffer and
		486	* length set to the buffer size. The buffer is owned by the
		487	* lto_code_gen_t and will be freed when lto_codegen_dispose()
		488	* is called, or lto_codegen_compile() is called again.
		489	* On failure, returns NULL (check lto_get_error_message() for details).
		490	*
		491	* \since prior to LTO_API_VERSION=3
		492	*/
		493	extern const void*
		494	lto_codegen_compile(lto_code_gen_t cg, size_t* length);
		495
		496	/**
		497	* Generates code for all added modules into one native object file.
		498	* This calls lto_codegen_optimize then lto_codegen_compile_optimized (instead
		499	* of returning a generated mach-o/ELF buffer, it writes to a file).
		500	*
		501	* The name of the file is written to name. Returns true on error.
		502	*
		503	* \since LTO_API_VERSION=5
		504	*/
		505	extern lto_bool_t
		506	lto_codegen_compile_to_file(lto_code_gen_t cg, const char** name);
		507
		508	/**
		509	* Runs optimization for the merged module. Returns true on error.
		510	*
		511	* \since LTO_API_VERSION=12
		512	*/
		513	extern lto_bool_t
		514	lto_codegen_optimize(lto_code_gen_t cg);
		515
		516	/**
		517	* Generates code for the optimized merged module into one native object file.
		518	* It will not run any IR optimizations on the merged module.
		519	*
		520	* On success returns a pointer to a generated mach-o/ELF buffer and length set
		521	* to the buffer size. The buffer is owned by the lto_code_gen_t and will be
		522	* freed when lto_codegen_dispose() is called, or
		523	* lto_codegen_compile_optimized() is called again. On failure, returns NULL
		524	* (check lto_get_error_message() for details).
		525	*
		526	* \since LTO_API_VERSION=12
		527	*/
		528	extern const void*
		529	lto_codegen_compile_optimized(lto_code_gen_t cg, size_t* length);
		530
		531	/**
		532	* Returns the runtime API version.
		533	*
		534	* \since LTO_API_VERSION=12
		535	*/
		536	extern unsigned int
		537	lto_api_version(void);
		538
		539	/**
		540	* Parses options immediately, making them available as early as possible. For
		541	* example during executing codegen::InitTargetOptionsFromCodeGenFlags. Since
		542	* parsing shud only happen once, only one of lto_codegen_debug_options or
		543	* lto_set_debug_options should be called.
		544	*
		545	* This function takes one or more options separated by spaces.
		546	* Warning: passing file paths through this function may confuse the argument
		547	* parser if the paths contain spaces.
		548	*
		549	* \since LTO_API_VERSION=28
		550	*/
		551	extern void lto_set_debug_options(const char const options, int number);
		552
		553	/**
		554	* Sets options to help debug codegen bugs. Since parsing shud only happen once,
		555	* only one of lto_codegen_debug_options or lto_set_debug_options
		556	* should be called.
		557	*
		558	* This function takes one or more options separated by spaces.
		559	* Warning: passing file paths through this function may confuse the argument
		560	* parser if the paths contain spaces.
		561	*
		562	* \since prior to LTO_API_VERSION=3
		563	*/
		564	extern void
		565	lto_codegen_debug_options(lto_code_gen_t cg, const char *);
		566
		567	/**
		568	* Same as the previous function, but takes every option separately through an
		569	* array.
		570	*
		571	* \since prior to LTO_API_VERSION=26
		572	*/
		573	extern void lto_codegen_debug_options_array(lto_code_gen_t cg,
		574	const char const , int number);
		575
		576	/**
		577	* Initializes LLVM disassemblers.
		578	* FIXME: This doesn't really belong here.
		579	*
		580	* \since LTO_API_VERSION=5
		581	*/
		582	extern void
		583	lto_initialize_disassembler(void);
		584
		585	/**
		586	* Sets if we should run internalize pass during optimization and code
		587	* generation.
		588	*
		589	* \since LTO_API_VERSION=14
		590	*/
		591	extern void
		592	lto_codegen_set_should_internalize(lto_code_gen_t cg,
		593	lto_bool_t ShouldInternalize);
		594
		595	/**
		596	* Set whether to embed uselists in bitcode.
		597	*
		598	* Sets whether \a lto_codegen_write_merged_modules() should embed uselists in
		599	* output bitcode. This should be turned on for all -save-temps output.
		600	*
		601	* \since LTO_API_VERSION=15
		602	*/
		603	extern void
		604	lto_codegen_set_should_embed_uselists(lto_code_gen_t cg,
		605	lto_bool_t ShouldEmbedUselists);
		606
		607	/** Opaque reference to an LTO input file */
		608	typedef struct LLVMOpaqueLTOInput *lto_input_t;
		609
		610	/**
		611	* Creates an LTO input file from a buffer. The path
		612	* argument is used for diagnotics as this function
		613	* otherwise does not know which file the given buffer
		614	* is associated with.
		615	*
		616	* \since LTO_API_VERSION=24
		617	*/
		618	extern lto_input_t lto_input_create(const void *buffer,
		619	size_t buffer_size,
		620	const char *path);
		621
		622	/**
		623	* Frees all memory internally allocated by the LTO input file.
		624	* Upon return the lto_module_t is no longer valid.
		625	*
		626	* \since LTO_API_VERSION=24
		627	*/
		628	extern void lto_input_dispose(lto_input_t input);
		629
		630	/**
		631	* Returns the number of dependent library specifiers
		632	* for the given LTO input file.
		633	*
		634	* \since LTO_API_VERSION=24
		635	*/
		636	extern unsigned lto_input_get_num_dependent_libraries(lto_input_t input);
		637
		638	/**
		639	* Returns the ith dependent library specifier
		640	* for the given LTO input file. The returned
		641	* string is not null-terminated.
		642	*
		643	* \since LTO_API_VERSION=24
		644	*/
		645	extern const char * lto_input_get_dependent_library(lto_input_t input,
		646	size_t index,
		647	size_t *size);
		648
		649	/**
		650	* Returns the list of libcall symbols that can be generated by LTO
		651	* that might not be visible from the symbol table of bitcode files.
		652	*
		653	* \since prior to LTO_API_VERSION=25
		654	*/
		655	extern const char const lto_runtime_lib_symbols_list(size_t *size);
		656
		657	/**
		658	* @} // endgoup LLVMCLTO
		659	* @defgroup LLVMCTLTO ThinLTO
		660	* @ingroup LLVMC
		661	*
		662	* @{
		663	*/
		664
		665	/**
		666	* Type to wrap a single object returned by ThinLTO.
		667	*
		668	* \since LTO_API_VERSION=18
		669	*/
		670	typedef struct {
		671	const char *Buffer;
		672	size_t Size;
		673	} LTOObjectBuffer;
		674
		675	/**
		676	* Instantiates a ThinLTO code generator.
		677	* Returns NULL on error (check lto_get_error_message() for details).
		678	*
		679	*
		680	* The ThinLTOCodeGenerator is not intended to be reuse for multiple
		681	* compilation: the model is that the client adds modules to the generator and
		682	* ask to perform the ThinLTO optimizations / codegen, and finally destroys the
		683	* codegenerator.
		684	*
		685	* \since LTO_API_VERSION=18
		686	*/
		687	extern thinlto_code_gen_t thinlto_create_codegen(void);
		688
		689	/**
		690	* Frees the generator and all memory it internally allocated.
		691	* Upon return the thinlto_code_gen_t is no longer valid.
		692	*
		693	* \since LTO_API_VERSION=18
		694	*/
		695	extern void thinlto_codegen_dispose(thinlto_code_gen_t cg);
		696
		697	/**
		698	* Add a module to a ThinLTO code generator. Identifier has to be unique among
		699	* all the modules in a code generator. The data buffer stays owned by the
		700	* client, and is expected to be available for the entire lifetime of the
		701	* thinlto_code_gen_t it is added to.
		702	*
		703	* On failure, returns NULL (check lto_get_error_message() for details).
		704	*
		705	*
		706	* \since LTO_API_VERSION=18
		707	*/
		708	extern void thinlto_codegen_add_module(thinlto_code_gen_t cg,
		709	const char identifier, const char data,
		710	int length);
		711
		712	/**
		713	* Optimize and codegen all the modules added to the codegenerator using
		714	* ThinLTO. Resulting objects are accessible using thinlto_module_get_object().
		715	*
		716	* \since LTO_API_VERSION=18
		717	*/
		718	extern void thinlto_codegen_process(thinlto_code_gen_t cg);
		719
		720	/**
		721	* Returns the number of object files produced by the ThinLTO CodeGenerator.
		722	*
		723	* It usually matches the number of input files, but this is not a guarantee of
		724	* the API and may change in future implementation, so the client should not
		725	* assume it.
		726	*
		727	* \since LTO_API_VERSION=18
		728	*/
		729	extern unsigned int thinlto_module_get_num_objects(thinlto_code_gen_t cg);
		730
		731	/**
		732	* Returns a reference to the ith object file produced by the ThinLTO
		733	* CodeGenerator.
		734	*
		735	* Client should use \p thinlto_module_get_num_objects() to get the number of
		736	* available objects.
		737	*
		738	* \since LTO_API_VERSION=18
		739	*/
		740	extern LTOObjectBuffer thinlto_module_get_object(thinlto_code_gen_t cg,
		741	unsigned int index);
		742
		743	/**
		744	* Returns the number of object files produced by the ThinLTO CodeGenerator.
		745	*
		746	* It usually matches the number of input files, but this is not a guarantee of
		747	* the API and may change in future implementation, so the client should not
		748	* assume it.
		749	*
		750	* \since LTO_API_VERSION=21
		751	*/
		752	unsigned int thinlto_module_get_num_object_files(thinlto_code_gen_t cg);
		753
		754	/**
		755	* Returns the path to the ith object file produced by the ThinLTO
		756	* CodeGenerator.
		757	*
		758	* Client should use \p thinlto_module_get_num_object_files() to get the number
		759	* of available objects.
		760	*
		761	* \since LTO_API_VERSION=21
		762	*/
		763	const char *thinlto_module_get_object_file(thinlto_code_gen_t cg,
		764	unsigned int index);
		765
		766	/**
		767	* Sets which PIC code model to generate.
		768	* Returns true on error (check lto_get_error_message() for details).
		769	*
		770	* \since LTO_API_VERSION=18
		771	*/
		772	extern lto_bool_t thinlto_codegen_set_pic_model(thinlto_code_gen_t cg,
		773	lto_codegen_model);
		774
		775	/**
		776	* Sets the path to a directory to use as a storage for temporary bitcode files.
		777	* The intention is to make the bitcode files available for debugging at various
		778	* stage of the pipeline.
		779	*
		780	* \since LTO_API_VERSION=18
		781	*/
		782	extern void thinlto_codegen_set_savetemps_dir(thinlto_code_gen_t cg,
		783	const char *save_temps_dir);
		784
		785	/**
		786	* Set the path to a directory where to save generated object files. This
		787	* path can be used by a linker to request on-disk files instead of in-memory
		788	* buffers. When set, results are available through
		789	* thinlto_module_get_object_file() instead of thinlto_module_get_object().
		790	*
		791	* \since LTO_API_VERSION=21
		792	*/
		793	void thinlto_set_generated_objects_dir(thinlto_code_gen_t cg,
		794	const char *save_temps_dir);
		795
		796	/**
		797	* Sets the cpu to generate code for.
		798	*
		799	* \since LTO_API_VERSION=18
		800	*/
		801	extern void thinlto_codegen_set_cpu(thinlto_code_gen_t cg, const char *cpu);
		802
		803	/**
		804	* Disable CodeGen, only run the stages till codegen and stop. The output will
		805	* be bitcode.
		806	*
		807	* \since LTO_API_VERSION=19
		808	*/
		809	extern void thinlto_codegen_disable_codegen(thinlto_code_gen_t cg,
		810	lto_bool_t disable);
		811
		812	/**
		813	* Perform CodeGen only: disable all other stages.
		814	*
		815	* \since LTO_API_VERSION=19
		816	*/
		817	extern void thinlto_codegen_set_codegen_only(thinlto_code_gen_t cg,
		818	lto_bool_t codegen_only);
		819
		820	/**
		821	* Parse -mllvm style debug options.
		822	*
		823	* \since LTO_API_VERSION=18
		824	*/
		825	extern void thinlto_debug_options(const char const options, int number);
		826
		827	/**
		828	* Test if a module has support for ThinLTO linking.
		829	*
		830	* \since LTO_API_VERSION=18
		831	*/
		832	extern lto_bool_t lto_module_is_thinlto(lto_module_t mod);
		833
		834	/**
		835	* Adds a symbol to the list of global symbols that must exist in the final
		836	* generated code. If a function is not listed there, it might be inlined into
		837	* every usage and optimized away. For every single module, the functions
		838	* referenced from code outside of the ThinLTO modules need to be added here.
		839	*
		840	* \since LTO_API_VERSION=18
		841	*/
		842	extern void thinlto_codegen_add_must_preserve_symbol(thinlto_code_gen_t cg,
		843	const char *name,
		844	int length);
		845
		846	/**
		847	* Adds a symbol to the list of global symbols that are cross-referenced between
		848	* ThinLTO files. If the ThinLTO CodeGenerator can ensure that every
		849	* references from a ThinLTO module to this symbol is optimized away, then
		850	* the symbol can be discarded.
		851	*
		852	* \since LTO_API_VERSION=18
		853	*/
		854	extern void thinlto_codegen_add_cross_referenced_symbol(thinlto_code_gen_t cg,
		855	const char *name,
		856	int length);
		857
		858	/**
		859	* @} // endgoup LLVMCTLTO
		860	* @defgroup LLVMCTLTO_CACHING ThinLTO Cache Control
		861	* @ingroup LLVMCTLTO
		862	*
		863	* These entry points control the ThinLTO cache. The cache is intended to
		864	* support incremental builds, and thus needs to be persistent across builds.
		865	* The client enables the cache by supplying a path to an existing directory.
		866	* The code generator will use this to store objects files that may be reused
		867	* during a subsequent build.
		868	* To avoid filling the disk space, a few knobs are provided:
		869	* - The pruning interval limits the frequency at which the garbage collector
		870	* will try to scan the cache directory to prune expired entries.
		871	* Setting to a negative number disables the pruning.
		872	* - The pruning expiration time indicates to the garbage collector how old an
		873	* entry needs to be to be removed.
		874	* - Finally, the garbage collector can be instructed to prune the cache until
		875	* the occupied space goes below a threshold.
		876	* @{
		877	*/
		878
		879	/**
		880	* Sets the path to a directory to use as a cache storage for incremental build.
		881	* Setting this activates caching.
		882	*
		883	* \since LTO_API_VERSION=18
		884	*/
		885	extern void thinlto_codegen_set_cache_dir(thinlto_code_gen_t cg,
		886	const char *cache_dir);
		887
		888	/**
		889	* Sets the cache pruning interval (in seconds). A negative value disables the
		890	* pruning. An unspecified default value will be applied, and a value of 0 will
		891	* force prunning to occur.
		892	*
		893	* \since LTO_API_VERSION=18
		894	*/
		895	extern void thinlto_codegen_set_cache_pruning_interval(thinlto_code_gen_t cg,
		896	int interval);
		897
		898	/**
		899	* Sets the maximum cache size that can be persistent across build, in terms of
		900	* percentage of the available space on the disk. Set to 100 to indicate
		901	* no limit, 50 to indicate that the cache size will not be left over half the
		902	* available space. A value over 100 will be reduced to 100, a value of 0 will
		903	* be ignored. An unspecified default value will be applied.
		904	*
		905	* The formula looks like:
		906	* AvailableSpace = FreeSpace + ExistingCacheSize
		907	* NewCacheSize = AvailableSpace * P/100
		908	*
		909	* \since LTO_API_VERSION=18
		910	*/
		911	extern void thinlto_codegen_set_final_cache_size_relative_to_available_space(
		912	thinlto_code_gen_t cg, unsigned percentage);
		913
		914	/**
		915	* Sets the expiration (in seconds) for an entry in the cache. An unspecified
		916	* default value will be applied. A value of 0 will be ignored.
		917	*
		918	* \since LTO_API_VERSION=18
		919	*/
		920	extern void thinlto_codegen_set_cache_entry_expiration(thinlto_code_gen_t cg,
		921	unsigned expiration);
		922
		923	/**
		924	* Sets the maximum size of the cache directory (in bytes). A value over the
		925	* amount of available space on the disk will be reduced to the amount of
		926	* available space. An unspecified default value will be applied. A value of 0
		927	* will be ignored.
		928	*
		929	* \since LTO_API_VERSION=22
		930	*/
		931	extern void thinlto_codegen_set_cache_size_bytes(thinlto_code_gen_t cg,
		932	unsigned max_size_bytes);
		933
		934	/**
		935	* Same as thinlto_codegen_set_cache_size_bytes, except the maximum size is in
		936	* megabytes (2^20 bytes).
		937	*
		938	* \since LTO_API_VERSION=23
		939	*/
		940	extern void
		941	thinlto_codegen_set_cache_size_megabytes(thinlto_code_gen_t cg,
		942	unsigned max_size_megabytes);
		943
		944	/**
		945	* Sets the maximum number of files in the cache directory. An unspecified
		946	* default value will be applied. A value of 0 will be ignored.
		947	*
		948	* \since LTO_API_VERSION=22
		949	*/
		950	extern void thinlto_codegen_set_cache_size_files(thinlto_code_gen_t cg,
		951	unsigned max_size_files);
		952
		953	/**
		954	* @} // endgroup LLVMCTLTO_CACHING
		955	*/
		956
		957	LLVM_C_EXTERN_C_END
		958
		959	#endif /* LLVM_C_LTO_H */

Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

QNX 8.QNX8 LLVM/Clang compiler suite//llvm-build/x86_64/include/llvm-c/lto.h – Rev 14