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438900938c
Generalize the API so we can distinguish symbols that are needed just for a DSO symbol table from those that are used from some native .o. The symbols that are only wanted for the dso symbol table can be dropped if llvm can prove every other dso has a copy (linkonce_odr) and the address is not important (unnamed_addr). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191922 91177308-0d34-0410-b5e6-96231b3b80d8
320 lines
8.9 KiB
C
320 lines
8.9 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 LLVM_C_LTO_H
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#define LLVM_C_LTO_H
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#ifndef __cplusplus
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#include <stdbool.h>
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#endif
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#include <stddef.h>
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#include <sys/types.h>
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/**
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* @defgroup LLVMCLTO LTO
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* @ingroup LLVMC
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*
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* @{
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*/
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#define LTO_API_VERSION 5
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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_DEFINITION_WEAKUNDEF = 0x00000500,
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LTO_SYMBOL_SCOPE_MASK = 0x00003800,
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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_PROTECTED = 0x00002000,
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LTO_SYMBOL_SCOPE_DEFAULT = 0x00001800,
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LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN = 0x00002800
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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 successful.
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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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* Loads an object file from disk. The seek point of fd is not preserved.
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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_fd(int fd, const char *path, size_t file_size);
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/**
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* Loads an object file from disk. The seek point of fd is not preserved.
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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_fd_at_offset(int fd, const char *path, size_t file_size,
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size_t map_size, off_t offset);
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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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* Sets triple string with which the object will be codegened.
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*/
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extern void
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lto_module_set_target_triple(lto_module_t mod, const char *triple);
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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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* Sets the cpu to generate code for.
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*/
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extern void
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lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu);
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/**
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* Sets the location of the assembler tool to run. If not set, libLTO
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* will use gcc to invoke the assembler.
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*/
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extern void
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lto_codegen_set_assembler_path(lto_code_gen_t cg, const char* path);
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/**
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* Sets extra arguments that libLTO should pass to the assembler.
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*/
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extern void
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lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
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int nargs);
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/**
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* Tells LTO optimization passes that this symbol must be preserved
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* because it is referenced by native code or a command line option.
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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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* Tells LTO optimization passes that a dynamic shared library is being
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* built and this symbol may be exported. Unless IR semantics allow the symbol
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* to be made local to the library, it should remain so it can be exported by
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* the shared library.
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*/
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extern void lto_codegen_add_dso_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 success 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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/**
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* Generates code for all added modules into one native object file.
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* The name of the file is written to name. Returns true on error.
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*/
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extern bool
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lto_codegen_compile_to_file(lto_code_gen_t cg, const char** name);
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/**
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* Sets options to help debug codegen bugs.
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*/
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extern void
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lto_codegen_debug_options(lto_code_gen_t cg, const char *);
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/**
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* Initializes LLVM disassemblers.
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* FIXME: This doesn't really belong here.
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*/
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extern void
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lto_initialize_disassembler(void);
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#ifdef __cplusplus
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}
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#endif
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/**
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* @}
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*/
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#endif
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