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236 lines
6.6 KiB
C
236 lines
6.6 KiB
C
/*===-- llvm-c/lto.h - LTO Public C Interface ---------------------*- C -*-===*\
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|* *|
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|* The LLVM Compiler Infrastructure *|
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|* *|
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|* This file is distributed under the University of Illinois Open Source *|
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|* License. See LICENSE.TXT for details. *|
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|* *|
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|*===----------------------------------------------------------------------===*|
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|* *|
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|* This header provides public interface to an abstract link time optimization*|
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|* library. LLVM provides an implementation of this interface for use with *|
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|* llvm bitcode files. *|
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|* *|
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\*===----------------------------------------------------------------------===*/
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#ifndef LTO_H
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#define LTO_H 1
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#include <stdbool.h>
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#include <stddef.h>
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typedef enum {
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LTO_SYMBOL_ALIGNMENT_MASK = 0x0000001F, /* log2 of alignment */
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LTO_SYMBOL_PERMISSIONS_MASK = 0x000000E0,
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LTO_SYMBOL_PERMISSIONS_CODE = 0x000000A0,
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LTO_SYMBOL_PERMISSIONS_DATA = 0x000000C0,
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LTO_SYMBOL_PERMISSIONS_RODATA = 0x00000080,
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LTO_SYMBOL_DEFINITION_MASK = 0x00000700,
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LTO_SYMBOL_DEFINITION_REGULAR = 0x00000100,
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LTO_SYMBOL_DEFINITION_TENTATIVE = 0x00000200,
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LTO_SYMBOL_DEFINITION_WEAK = 0x00000300,
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LTO_SYMBOL_DEFINITION_UNDEFINED = 0x00000400,
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LTO_SYMBOL_SCOPE_MASK = 0x00001800,
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LTO_SYMBOL_SCOPE_INTERNAL = 0x00000800,
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LTO_SYMBOL_SCOPE_HIDDEN = 0x00001000,
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LTO_SYMBOL_SCOPE_DEFAULT = 0x00001800
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} lto_symbol_attributes;
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typedef enum {
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LTO_DEBUG_MODEL_NONE = 0,
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LTO_DEBUG_MODEL_DWARF = 1
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} lto_debug_model;
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typedef enum {
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LTO_CODEGEN_PIC_MODEL_STATIC = 0,
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LTO_CODEGEN_PIC_MODEL_DYNAMIC = 1,
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LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC = 2
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} lto_codegen_model;
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/** opaque reference to a loaded object module */
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typedef struct LTOModule* lto_module_t;
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/** opaque reference to a code generator */
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typedef struct LTOCodeGenerator* lto_code_gen_t;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Returns a printable string.
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*/
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extern const char*
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lto_get_version(void);
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/**
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* Returns the last error string or NULL if last operation was sucessful.
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*/
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extern const char*
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lto_get_error_message(void);
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/**
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* Checks if a file is a loadable object file.
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*/
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extern bool
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lto_module_is_object_file(const char* path);
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/**
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* Checks if a file is a loadable object compiled for requested target.
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*/
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extern bool
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lto_module_is_object_file_for_target(const char* path,
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const char* target_triple_prefix);
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/**
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* Checks if a buffer is a loadable object file.
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*/
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extern bool
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lto_module_is_object_file_in_memory(const void* mem, size_t length);
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/**
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* Checks if a buffer is a loadable object compiled for requested target.
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*/
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extern bool
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lto_module_is_object_file_in_memory_for_target(const void* mem, size_t length,
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const char* target_triple_prefix);
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/**
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* Loads an object file from disk.
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* Returns NULL on error (check lto_get_error_message() for details).
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*/
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extern lto_module_t
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lto_module_create(const char* path);
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/**
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* Loads an object file from memory.
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* Returns NULL on error (check lto_get_error_message() for details).
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*/
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extern lto_module_t
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lto_module_create_from_memory(const void* mem, size_t length);
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/**
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* Frees all memory internally allocated by the module.
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* Upon return the lto_module_t is no longer valid.
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*/
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extern void
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lto_module_dispose(lto_module_t mod);
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/**
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* Returns triple string which the object module was compiled under.
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*/
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extern const char*
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lto_module_get_target_triple(lto_module_t mod);
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/**
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* Returns the number of symbols in the object module.
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*/
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extern unsigned int
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lto_module_get_num_symbols(lto_module_t mod);
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/**
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* Returns the name of the ith symbol in the object module.
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*/
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extern const char*
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lto_module_get_symbol_name(lto_module_t mod, unsigned int index);
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/**
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* Returns the attributes of the ith symbol in the object module.
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*/
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extern lto_symbol_attributes
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lto_module_get_symbol_attribute(lto_module_t mod, unsigned int index);
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/**
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* Instantiates a code generator.
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* Returns NULL on error (check lto_get_error_message() for details).
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*/
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extern lto_code_gen_t
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lto_codegen_create(void);
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/**
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* Frees all code generator and all memory it internally allocated.
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* Upon return the lto_code_gen_t is no longer valid.
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*/
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extern void
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lto_codegen_dispose(lto_code_gen_t);
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/**
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* Add an object module to the set of modules for which code will be generated.
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* Returns true on error (check lto_get_error_message() for details).
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*/
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extern bool
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lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod);
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/**
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* Sets if debug info should be generated.
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* Returns true on error (check lto_get_error_message() for details).
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*/
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extern bool
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lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model);
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/**
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* Sets which PIC code model to generated.
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* Returns true on error (check lto_get_error_message() for details).
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*/
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extern bool
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lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model);
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/**
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* Adds to a list of all global symbols that must exist in the final
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* generated code. If a function is not listed, it might be
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* inlined into every usage and optimized away.
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*/
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extern void
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lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg, const char* symbol);
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/**
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* Writes a new object file at the specified path that contains the
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* merged contents of all modules added so far.
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* Returns true on error (check lto_get_error_message() for details).
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*/
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extern bool
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lto_codegen_write_merged_modules(lto_code_gen_t cg, const char* path);
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/**
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* Generates code for all added modules into one native object file.
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* On sucess returns a pointer to a generated mach-o/ELF buffer and
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* length set to the buffer size. The buffer is owned by the
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* lto_code_gen_t and will be freed when lto_codegen_dispose()
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* is called, or lto_codegen_compile() is called again.
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* On failure, returns NULL (check lto_get_error_message() for details).
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*/
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extern const void*
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lto_codegen_compile(lto_code_gen_t cg, size_t* length);
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#ifdef __cplusplus
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}
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#endif
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#endif
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