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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53249 91177308-0d34-0410-b5e6-96231b3b80d8
252 lines
5.8 KiB
C++
252 lines
5.8 KiB
C++
//===-lto.cpp - LLVM Link Time Optimizer ----------------------------------===//
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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 file implements the Link Time Optimization library. This library is
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// intended to be used by linker to optimize code at link time.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm-c/lto.h"
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#include "LTOModule.h"
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#include "LTOCodeGenerator.h"
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// holds most recent error string
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// *** not thread safe ***
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static std::string sLastErrorString;
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//
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// returns a printable string
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//
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extern const char* lto_get_version()
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{
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return LTOCodeGenerator::getVersionString();
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}
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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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const char* lto_get_error_message()
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{
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return sLastErrorString.c_str();
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}
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//
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// validates if a file is a loadable object file
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//
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bool lto_module_is_object_file(const char* path)
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{
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return LTOModule::isBitcodeFile(path);
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}
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//
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// validates if a file is a loadable object file compilable for requested target
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//
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bool lto_module_is_object_file_for_target(const char* path,
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const char* target_triplet_prefix)
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{
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return LTOModule::isBitcodeFileForTarget(path, target_triplet_prefix);
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}
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//
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// validates if a buffer is a loadable object file
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//
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bool lto_module_is_object_file_in_memory(const void* mem, size_t length)
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{
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return LTOModule::isBitcodeFile(mem, length);
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}
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//
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// validates if a buffer is a loadable object file compilable for the target
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//
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bool lto_module_is_object_file_in_memory_for_target(const void* mem,
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size_t length, const char* target_triplet_prefix)
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{
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return LTOModule::isBitcodeFileForTarget(mem, length, target_triplet_prefix);
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}
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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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lto_module_t lto_module_create(const char* path)
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{
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return LTOModule::makeLTOModule(path, sLastErrorString);
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}
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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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lto_module_t lto_module_create_from_memory(const void* mem, size_t length)
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{
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return LTOModule::makeLTOModule(mem, length, sLastErrorString);
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}
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//
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// frees all memory for a module
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// upon return the lto_module_t is no longer valid
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//
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void lto_module_dispose(lto_module_t mod)
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{
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delete mod;
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}
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//
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// returns triplet string which the object module was compiled under
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//
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const char* lto_module_get_target_triple(lto_module_t mod)
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{
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return mod->getTargetTriple();
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}
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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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uint32_t lto_module_get_num_symbols(lto_module_t mod)
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{
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return mod->getSymbolCount();
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}
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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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const char* lto_module_get_symbol_name(lto_module_t mod, uint32_t index)
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{
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return mod->getSymbolName(index);
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}
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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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lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
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uint32_t index)
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{
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return mod->getSymbolAttributes(index);
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}
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//
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// instantiates a code generator
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// returns NULL if there is an error
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//
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lto_code_gen_t lto_codegen_create()
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{
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return new LTOCodeGenerator();
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}
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//
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// frees all memory for a code generator
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// upon return the lto_code_gen_t is no longer valid
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//
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void lto_codegen_dispose(lto_code_gen_t cg)
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{
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delete cg;
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}
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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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bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod)
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{
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return cg->addModule(mod, sLastErrorString);
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}
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//
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// sets what if any format of 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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bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug)
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{
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return cg->setDebugInfo(debug, sLastErrorString);
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}
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//
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// sets what 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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bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model)
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{
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return cg->setCodePICModel(model, sLastErrorString);
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}
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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 there, it might be
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// inlined into every usage and optimized away.
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//
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void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg, const char* symbol)
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{
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cg->addMustPreserveSymbol(symbol);
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}
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//
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// writes a new 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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bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char* path)
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{
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return cg->writeMergedModules(path, sLastErrorString);
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}
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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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{
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return cg->compile(length, sLastErrorString);
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}
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//
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// Used to pass extra options to the code generator
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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 * opt)
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{
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cg->setCodeGenDebugOptions(opt);
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}
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