mirror of
https://github.com/c64scene-ar/llvm-6502.git
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bd26e6a006
When debugging LTO issues with ld64, we use -save-temps to save the merged optimized bitcode file, then invoke ld64 again on the single bitcode file to speed up debugging code generation passes and ld64 stuff after code generation. llvm linking a single bitcode file via lto_codegen_add_module will generate a different bitcode file from the single input. With the newly-added lto_codegen_set_module, we can make sure the destination module is the same as the input. lto_codegen_set_module will transfer the ownship of the module to code generator. rdar://19024554 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230290 91177308-0d34-0410-b5e6-96231b3b80d8
560 lines
15 KiB
C
560 lines
15 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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#include <stddef.h>
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#include <sys/types.h>
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#ifndef __cplusplus
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#if !defined(_MSC_VER)
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#include <stdbool.h>
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typedef bool lto_bool_t;
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#else
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/* MSVC in particular does not have anything like _Bool or bool in C, but we can
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at least make sure the type is the same size. The implementation side will
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use C++ bool. */
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typedef unsigned char lto_bool_t;
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#endif
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#else
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typedef bool lto_bool_t;
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#endif
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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 13
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/**
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* \since prior to LTO_API_VERSION=3
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*/
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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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/**
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* \since prior to LTO_API_VERSION=3
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*/
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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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/**
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* \since prior to LTO_API_VERSION=3
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*/
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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_PIC_MODEL_DEFAULT = 3
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} lto_codegen_model;
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/** opaque reference to a loaded object module */
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typedef struct LLVMOpaqueLTOModule *lto_module_t;
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/** opaque reference to a code generator */
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typedef struct LLVMOpaqueLTOCodeGenerator *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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* \since prior to LTO_API_VERSION=3
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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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* \since prior to LTO_API_VERSION=3
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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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* \since prior to LTO_API_VERSION=3
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*/
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extern lto_bool_t
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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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* \since prior to LTO_API_VERSION=3
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*/
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extern lto_bool_t
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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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* \since prior to LTO_API_VERSION=3
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*/
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extern lto_bool_t
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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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* \since prior to LTO_API_VERSION=3
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*/
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extern lto_bool_t
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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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* \since prior to LTO_API_VERSION=3
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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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* \since prior to LTO_API_VERSION=3
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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 memory with an extra path argument.
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* Returns NULL on error (check lto_get_error_message() for details).
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*
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* \since prior to LTO_API_VERSION=9
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*/
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extern lto_module_t
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lto_module_create_from_memory_with_path(const void* mem, size_t length,
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const char *path);
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/**
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* \brief Loads an object file in its own context.
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*
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* Loads an object file in its own LLVMContext. This function call is
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* thread-safe. However, modules created this way should not be merged into an
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* lto_code_gen_t using \a lto_codegen_add_module().
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*
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* Returns NULL on error (check lto_get_error_message() for details).
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*
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* \since LTO_API_VERSION=11
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*/
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extern lto_module_t
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lto_module_create_in_local_context(const void *mem, size_t length,
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const char *path);
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/**
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* \brief Loads an object file in the codegen context.
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*
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* Loads an object file into the same context as \c cg. The module is safe to
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* add using \a lto_codegen_add_module().
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*
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* Returns NULL on error (check lto_get_error_message() for details).
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*
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* \since LTO_API_VERSION=11
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*/
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extern lto_module_t
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lto_module_create_in_codegen_context(const void *mem, size_t length,
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const char *path, lto_code_gen_t cg);
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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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* \since LTO_API_VERSION=5
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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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* \since LTO_API_VERSION=5
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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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* \since prior to LTO_API_VERSION=3
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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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* \since prior to LTO_API_VERSION=3
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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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* \since LTO_API_VERSION=4
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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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* \since prior to LTO_API_VERSION=3
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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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* \since prior to LTO_API_VERSION=3
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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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* \since prior to LTO_API_VERSION=3
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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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* Returns the number of dependent libraries in the object module.
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*
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* \since LTO_API_VERSION=8
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*/
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extern unsigned int
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lto_module_get_num_deplibs(lto_module_t mod);
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/**
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* Returns the ith dependent library in the module.
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*
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* \since LTO_API_VERSION=8
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*/
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extern const char*
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lto_module_get_deplib(lto_module_t mod, unsigned int index);
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/**
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* Returns the number of linker options in the object module.
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*
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* \since LTO_API_VERSION=8
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*/
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extern unsigned int
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lto_module_get_num_linkeropts(lto_module_t mod);
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/**
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* Returns the ith linker option in the module.
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*
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* \since LTO_API_VERSION=8
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*/
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extern const char*
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lto_module_get_linkeropt(lto_module_t mod, unsigned int index);
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/**
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* Diagnostic severity.
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*
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* \since LTO_API_VERSION=7
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*/
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typedef enum {
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LTO_DS_ERROR = 0,
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LTO_DS_WARNING = 1,
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LTO_DS_REMARK = 3, // Added in LTO_API_VERSION=10.
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LTO_DS_NOTE = 2
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} lto_codegen_diagnostic_severity_t;
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/**
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* Diagnostic handler type.
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* \p severity defines the severity.
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* \p diag is the actual diagnostic.
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* The diagnostic is not prefixed by any of severity keyword, e.g., 'error: '.
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* \p ctxt is used to pass the context set with the diagnostic handler.
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*
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* \since LTO_API_VERSION=7
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*/
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typedef void (*lto_diagnostic_handler_t)(
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lto_codegen_diagnostic_severity_t severity, const char *diag, void *ctxt);
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/**
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* Set a diagnostic handler and the related context (void *).
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* This is more general than lto_get_error_message, as the diagnostic handler
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* can be called at anytime within lto.
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*
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* \since LTO_API_VERSION=7
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*/
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extern void lto_codegen_set_diagnostic_handler(lto_code_gen_t,
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lto_diagnostic_handler_t,
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void *);
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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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* All modules added using \a lto_codegen_add_module() must have been created
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* in the same context as the codegen.
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*
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* \since prior to LTO_API_VERSION=3
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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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* \brief Instantiate a code generator in its own context.
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*
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* Instantiates a code generator in its own context. Modules added via \a
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* lto_codegen_add_module() must have all been created in the same context,
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* using \a lto_module_create_in_codegen_context().
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*
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* \since LTO_API_VERSION=11
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*/
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extern lto_code_gen_t
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lto_codegen_create_in_local_context(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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* \since prior to LTO_API_VERSION=3
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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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* \c cg and \c mod must both be in the same context. See \a
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* lto_codegen_create_in_local_context() and \a
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* lto_module_create_in_codegen_context().
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*
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* \since prior to LTO_API_VERSION=3
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*/
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extern lto_bool_t
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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 the object module for code generation. This will transfer the ownship of
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* the module to code generator.
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*
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* \c cg and \c mod must both be in the same context.
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*
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* \since prior to LTO_API_VERSION=13
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*/
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extern void
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lto_codegen_set_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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* \since prior to LTO_API_VERSION=3
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*/
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extern lto_bool_t
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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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* \since prior to LTO_API_VERSION=3
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*/
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extern lto_bool_t
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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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* \since LTO_API_VERSION=4
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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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* \since LTO_API_VERSION=3
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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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* \since LTO_API_VERSION=4
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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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* Adds to a list of all global symbols that must exist in the final generated
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* code. If a function is not listed there, it might be inlined into every usage
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* and optimized away.
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*
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* \since prior to LTO_API_VERSION=3
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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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* \since LTO_API_VERSION=5
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*/
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extern lto_bool_t
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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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* This calls lto_codegen_optimize then lto_codegen_compile_optimized.
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*
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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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* \since prior to LTO_API_VERSION=3
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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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* This calls lto_codegen_optimize then lto_codegen_compile_optimized (instead
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* of returning a generated mach-o/ELF buffer, it writes to a file).
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*
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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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* \since LTO_API_VERSION=5
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*/
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extern lto_bool_t
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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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* Runs optimization for the merged module. Returns true on error.
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*
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|
* \since LTO_API_VERSION=12
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|
*/
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|
extern lto_bool_t
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|
lto_codegen_optimize(lto_code_gen_t cg);
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|
|
|
/**
|
|
* Generates code for the optimized merged module into one native object file.
|
|
* It will not run any IR optimizations on the merged module.
|
|
*
|
|
* 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_optimized() is called again. On failure, returns NULL
|
|
* (check lto_get_error_message() for details).
|
|
*
|
|
* \since LTO_API_VERSION=12
|
|
*/
|
|
extern const void*
|
|
lto_codegen_compile_optimized(lto_code_gen_t cg, size_t* length);
|
|
|
|
/**
|
|
* Returns the runtime API version.
|
|
*
|
|
* \since LTO_API_VERSION=12
|
|
*/
|
|
extern unsigned int
|
|
lto_api_version(void);
|
|
|
|
/**
|
|
* Sets options to help debug codegen bugs.
|
|
*
|
|
* \since prior to LTO_API_VERSION=3
|
|
*/
|
|
extern void
|
|
lto_codegen_debug_options(lto_code_gen_t cg, const char *);
|
|
|
|
/**
|
|
* Initializes LLVM disassemblers.
|
|
* FIXME: This doesn't really belong here.
|
|
*
|
|
* \since LTO_API_VERSION=5
|
|
*/
|
|
extern void
|
|
lto_initialize_disassembler(void);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif
|