llvm-6502/include/llvm-c/lto.h
Shuxin Yang 00c198042e Revert 189297, the original commit message is following.
----
  Add new API lto_codegen_compile_parallel().

  This API is proposed by Nick Kledzik. The semantic is:

  --------------------------------------------------------------------------
   Generate code for merged module into an array of native object files. On 
   success returns a pointer to an array of NativeObjectFile.  The count 
   parameter returns the number of elements in the array.  Each element is 
   a pointer/length for a generated mach-o/ELF buffer.  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 struct  NativeObjectFile*
   lto_codegen_compile_parallel(lto_code_gen_t cg, size_t *count);
  ---------------------------------------------------------------------------

  This API is currently only called on OSX platform. Linux or other Unixes
using GNU gold are not supposed to call this function, because on these systems, 
object files are fed back to linker via disk file instead of memory buffer.

  In this commit, lto_codegen_compile_parallel() simply calls
lto_codegen_compile() to return a single object file. In the near future,
this function is the entry point for compilation with partition. Linker can
blindly call this function even if partition is turned off; in this case,
compiler will return only one object file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189386 91177308-0d34-0410-b5e6-96231b3b80d8
2013-08-27 17:15:54 +00:00

310 lines
8.5 KiB
C

/*===-- 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 <stdbool.h>
#include <stddef.h>
#include <unistd.h>
/**
* @defgroup LLVMCLTO LTO
* @ingroup LLVMC
*
* @{
*/
#define LTO_API_VERSION 4
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 bool
lto_module_is_object_file(const char* path);
/**
* Checks if a file is a loadable object compiled for requested target.
*/
extern bool
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 bool
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 bool
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 bool
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 bool
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 bool
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);
/**
* Adds to a list of all global symbols that must exist in the final
* generated code. If a function is not listed, it might be
* inlined into every usage and optimized away.
*/
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 bool
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 bool
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