//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
-//
+//
//===----------------------------------------------------------------------===//
//
-// This file implements the Link Time Optimization library. This library is
+// This file implements the Link Time Optimization library. This library is
// intended to be used by linker to optimize code at link time.
//
//===----------------------------------------------------------------------===//
#include "llvm-c/lto.h"
#include "llvm-c/Core.h"
-
-#include "LTOModule.h"
-#include "LTOCodeGenerator.h"
-
-
-// holds most recent error string
-// *** not thread safe ***
+#include "llvm-c/Target.h"
+#include "llvm/CodeGen/CommandFlags.h"
+#include "llvm/LTO/LTOCodeGenerator.h"
+#include "llvm/LTO/LTOModule.h"
+
+// extra command-line flags needed for LTOCodeGenerator
+static cl::opt<bool>
+DisableOpt("disable-opt", cl::init(false),
+ cl::desc("Do not run any optimization passes"));
+
+static cl::opt<bool>
+DisableInline("disable-inlining", cl::init(false),
+ cl::desc("Do not run the inliner pass"));
+
+static cl::opt<bool>
+DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
+ cl::desc("Do not run the GVN load PRE pass"));
+
+// Holds most recent error string.
+// *** Not thread safe ***
static std::string sLastErrorString;
-
-
-//
-// returns a printable string
-//
-extern const char* lto_get_version()
-{
- return LTOCodeGenerator::getVersionString();
+// Holds the initialization state of the LTO module.
+// *** Not thread safe ***
+static bool initialized = false;
+
+// Holds the command-line option parsing state of the LTO module.
+static bool parsedOptions = false;
+
+// Initialize the configured targets if they have not been initialized.
+static void lto_initialize() {
+ if (!initialized) {
+ LLVMInitializeAllTargetInfos();
+ LLVMInitializeAllTargets();
+ LLVMInitializeAllTargetMCs();
+ LLVMInitializeAllAsmParsers();
+ LLVMInitializeAllAsmPrinters();
+ LLVMInitializeAllDisassemblers();
+ initialized = true;
+ }
}
-//
-// returns the last error string or NULL if last operation was successful
-//
-const char* lto_get_error_message()
-{
- return sLastErrorString.c_str();
+static void lto_set_target_options(llvm::TargetOptions &Options) {
+ Options.LessPreciseFPMADOption = EnableFPMAD;
+ Options.NoFramePointerElim = DisableFPElim;
+ Options.AllowFPOpFusion = FuseFPOps;
+ Options.UnsafeFPMath = EnableUnsafeFPMath;
+ Options.NoInfsFPMath = EnableNoInfsFPMath;
+ Options.NoNaNsFPMath = EnableNoNaNsFPMath;
+ Options.HonorSignDependentRoundingFPMathOption =
+ EnableHonorSignDependentRoundingFPMath;
+ Options.UseSoftFloat = GenerateSoftFloatCalls;
+ if (FloatABIForCalls != llvm::FloatABI::Default)
+ Options.FloatABIType = FloatABIForCalls;
+ Options.NoZerosInBSS = DontPlaceZerosInBSS;
+ Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
+ Options.DisableTailCalls = DisableTailCalls;
+ Options.StackAlignmentOverride = OverrideStackAlignment;
+ Options.TrapFuncName = TrapFuncName;
+ Options.PositionIndependentExecutable = EnablePIE;
+ Options.EnableSegmentedStacks = SegmentedStacks;
+ Options.UseInitArray = UseInitArray;
}
-
-
-//
-// validates if a file is a loadable object file
-//
-bool lto_module_is_object_file(const char* path)
-{
- return LTOModule::isBitcodeFile(path);
+/// lto_get_version - Returns a printable string.
+extern const char* lto_get_version() {
+ return LTOCodeGenerator::getVersionString();
}
-
-//
-// validates if a file is a loadable object file compilable for requested target
-//
-bool lto_module_is_object_file_for_target(const char* path,
- const char* target_triplet_prefix)
-{
- return LTOModule::isBitcodeFileForTarget(path, target_triplet_prefix);
+/// lto_get_error_message - Returns the last error string or NULL if last
+/// operation was successful.
+const char* lto_get_error_message() {
+ return sLastErrorString.c_str();
}
-
-//
-// validates if a buffer is a loadable object file
-//
-bool lto_module_is_object_file_in_memory(const void* mem, size_t length)
-{
- return LTOModule::isBitcodeFile(mem, length);
+/// lto_module_is_object_file - Validates if a file is a loadable object file.
+bool lto_module_is_object_file(const char* path) {
+ return LTOModule::isBitcodeFile(path);
}
-
-//
-// validates if a buffer is a loadable object file compilable for the target
-//
-bool lto_module_is_object_file_in_memory_for_target(const void* mem,
- size_t length, const char* target_triplet_prefix)
-{
- return LTOModule::isBitcodeFileForTarget(mem, length, target_triplet_prefix);
+/// lto_module_is_object_file_for_target - Validates if a file is a loadable
+/// object file compilable for requested target.
+bool lto_module_is_object_file_for_target(const char* path,
+ const char* target_triplet_prefix) {
+ return LTOModule::isBitcodeFileForTarget(path, target_triplet_prefix);
}
-
-
-//
-// loads an object file from disk
-// returns NULL on error (check lto_get_error_message() for details)
-//
-lto_module_t lto_module_create(const char* path)
-{
- return LTOModule::makeLTOModule(path, sLastErrorString);
+/// lto_module_is_object_file_in_memory - Validates if a buffer is a loadable
+/// object file.
+bool lto_module_is_object_file_in_memory(const void* mem, size_t length) {
+ return LTOModule::isBitcodeFile(mem, length);
}
-
-//
-// loads an object file from memory
-// returns NULL on error (check lto_get_error_message() for details)
-//
-lto_module_t lto_module_create_from_memory(const void* mem, size_t length)
-{
- return LTOModule::makeLTOModule(mem, length, sLastErrorString);
+/// lto_module_is_object_file_in_memory_for_target - Validates if a buffer is a
+/// loadable object file compilable for the target.
+bool
+lto_module_is_object_file_in_memory_for_target(const void* mem,
+ size_t length,
+ const char* target_triplet_prefix) {
+ return LTOModule::isBitcodeFileForTarget(mem, length, target_triplet_prefix);
}
-
-//
-// frees all memory for a module
-// upon return the lto_module_t is no longer valid
-//
-void lto_module_dispose(lto_module_t mod)
-{
- delete mod;
+/// lto_module_create - Loads an object file from disk. Returns NULL on error
+/// (check lto_get_error_message() for details).
+lto_module_t lto_module_create(const char* path) {
+ lto_initialize();
+ llvm::TargetOptions Options;
+ lto_set_target_options(Options);
+ return LTOModule::makeLTOModule(path, Options, sLastErrorString);
}
-
-//
-// returns triplet string which the object module was compiled under
-//
-const char* lto_module_get_target_triple(lto_module_t mod)
-{
- return mod->getTargetTriple();
+/// lto_module_create_from_fd - Loads an object file from disk. Returns NULL on
+/// error (check lto_get_error_message() for details).
+lto_module_t lto_module_create_from_fd(int fd, const char *path, size_t size) {
+ lto_initialize();
+ llvm::TargetOptions Options;
+ lto_set_target_options(Options);
+ return LTOModule::makeLTOModule(fd, path, size, Options, sLastErrorString);
}
-//
-// sets triple string with which the object will be codegened.
-//
-void lto_module_set_target_triple(lto_module_t mod, const char *triple)
-{
- return mod->setTargetTriple(triple);
+/// lto_module_create_from_fd_at_offset - Loads an object file from disk.
+/// Returns NULL on error (check lto_get_error_message() for details).
+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) {
+ lto_initialize();
+ llvm::TargetOptions Options;
+ lto_set_target_options(Options);
+ return LTOModule::makeLTOModule(fd, path, map_size, offset, Options,
+ sLastErrorString);
}
-
-//
-// returns the number of symbols in the object module
-//
-uint32_t lto_module_get_num_symbols(lto_module_t mod)
-{
- return mod->getSymbolCount();
+/// lto_module_create_from_memory - Loads an object file from memory. Returns
+/// NULL on error (check lto_get_error_message() for details).
+lto_module_t lto_module_create_from_memory(const void* mem, size_t length) {
+ lto_initialize();
+ llvm::TargetOptions Options;
+ lto_set_target_options(Options);
+ return LTOModule::makeLTOModule(mem, length, Options, sLastErrorString);
}
-//
-// returns the name of the ith symbol in the object module
-//
-const char* lto_module_get_symbol_name(lto_module_t mod, uint32_t index)
-{
- return mod->getSymbolName(index);
+/// lto_module_dispose - Frees all memory for a module. Upon return the
+/// lto_module_t is no longer valid.
+void lto_module_dispose(lto_module_t mod) {
+ delete mod;
}
-
-//
-// returns the attributes of the ith symbol in the object module
-//
-lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
- uint32_t index)
-{
- return mod->getSymbolAttributes(index);
+/// lto_module_get_target_triple - Returns triplet string which the object
+/// module was compiled under.
+const char* lto_module_get_target_triple(lto_module_t mod) {
+ return mod->getTargetTriple();
}
-
-
-
-
-//
-// instantiates a code generator
-// returns NULL if there is an error
-//
-lto_code_gen_t lto_codegen_create(void)
-{
- return new LTOCodeGenerator();
+/// lto_module_set_target_triple - Sets triple string with which the object will
+/// be codegened.
+void lto_module_set_target_triple(lto_module_t mod, const char *triple) {
+ return mod->setTargetTriple(triple);
}
+/// lto_module_get_num_symbols - Returns the number of symbols in the object
+/// module.
+unsigned int lto_module_get_num_symbols(lto_module_t mod) {
+ return mod->getSymbolCount();
+}
+/// lto_module_get_symbol_name - Returns the name of the ith symbol in the
+/// object module.
+const char* lto_module_get_symbol_name(lto_module_t mod, unsigned int index) {
+ return mod->getSymbolName(index);
+}
-//
-// frees all memory for a code generator
-// upon return the lto_code_gen_t is no longer valid
-//
-void lto_codegen_dispose(lto_code_gen_t cg)
-{
- delete cg;
+/// lto_module_get_symbol_attribute - Returns the attributes of the ith symbol
+/// in the object module.
+lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
+ unsigned int index) {
+ return mod->getSymbolAttributes(index);
}
+/// lto_codegen_create - Instantiates a code generator. Returns NULL if there
+/// is an error.
+lto_code_gen_t lto_codegen_create(void) {
+ lto_initialize();
+ TargetOptions Options;
+ lto_set_target_options(Options);
-//
-// 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)
-//
-bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod)
-{
- return cg->addModule(mod, sLastErrorString);
+ LTOCodeGenerator *CodeGen = new LTOCodeGenerator();
+ if (CodeGen)
+ CodeGen->setTargetOptions(Options);
+ return CodeGen;
}
+/// lto_codegen_dispose - Frees all memory for a code generator. Upon return the
+/// lto_code_gen_t is no longer valid.
+void lto_codegen_dispose(lto_code_gen_t cg) {
+ delete cg;
+}
-//
-// sets what if any format of debug info should be generated
-// returns true on error (check lto_get_error_message() for details)
-//
-bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug)
-{
- return cg->setDebugInfo(debug, sLastErrorString);
+/// lto_codegen_add_module - 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).
+bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod) {
+ return !cg->addModule(mod, sLastErrorString);
}
+/// lto_codegen_set_debug_model - Sets what if any format of debug info should
+/// be generated. Returns true on error (check lto_get_error_message() for
+/// details).
+bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug) {
+ cg->setDebugInfo(debug);
+ return false;
+}
-//
-// sets what code model to generated
-// returns true on error (check lto_get_error_message() for details)
-//
-bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model)
-{
- return cg->setCodePICModel(model, sLastErrorString);
+/// lto_codegen_set_pic_model - Sets what code model to generated. Returns true
+/// on error (check lto_get_error_message() for details).
+bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model) {
+ cg->setCodePICModel(model);
+ return false;
}
-//
-// sets the cpu to generate code for
-//
-void lto_codegen_set_cpu(lto_code_gen_t cg, const char* cpu)
-{
+/// lto_codegen_set_cpu - Sets the cpu to generate code for.
+void lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu) {
return cg->setCpu(cpu);
}
-//
-// sets the path to the assembler tool
-//
-void lto_codegen_set_assembler_path(lto_code_gen_t cg, const char* path)
-{
- cg->setAssemblerPath(path);
+/// lto_codegen_set_assembler_path - Sets the path to the assembler tool.
+void lto_codegen_set_assembler_path(lto_code_gen_t cg, const char *path) {
+ // In here only for backwards compatibility. We use MC now.
}
-
-//
-// sets extra arguments that libLTO should pass to the assembler
-//
-void lto_codegen_set_assembler_args(lto_code_gen_t cg, const char** args,
- int nargs)
-{
- cg->setAssemblerArgs(args, nargs);
+/// lto_codegen_set_assembler_args - Sets extra arguments that libLTO should
+/// pass to the assembler.
+void lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
+ int nargs) {
+ // In here only for backwards compatibility. We use MC now.
}
-//
-// adds to a list of all global symbols that must exist in the final
-// generated code. If a function is not listed there, it might be
-// inlined into every usage and optimized away.
-//
-void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg, const char* symbol)
-{
+/// lto_codegen_add_must_preserve_symbol - Adds to a list of all global symbols
+/// that must exist in the final generated code. If a function is not listed
+/// there, it might be inlined into every usage and optimized away.
+void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg,
+ const char *symbol) {
cg->addMustPreserveSymbol(symbol);
}
-
-//
-// writes a new 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)
-//
-bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char* path)
-{
- return cg->writeMergedModules(path, sLastErrorString);
+/// lto_codegen_write_merged_modules - Writes a new 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).
+bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char *path) {
+ if (!parsedOptions) {
+ cg->parseCodeGenDebugOptions();
+ parsedOptions = true;
+ }
+ return !cg->writeMergedModules(path, sLastErrorString);
}
-
-//
-// Generates code for all added modules into one native object file.
-// On sucess 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)
-{
- return cg->compile(length, sLastErrorString);
+/// lto_codegen_compile - 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
+/// object 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).
+const void *lto_codegen_compile(lto_code_gen_t cg, size_t *length) {
+ if (!parsedOptions) {
+ cg->parseCodeGenDebugOptions();
+ parsedOptions = true;
+ }
+ return cg->compile(length, DisableOpt, DisableInline, DisableGVNLoadPRE,
+ sLastErrorString);
}
+/// lto_codegen_compile_to_file - Generates code for all added modules into one
+/// native object file. The name of the file is written to name. Returns true on
+/// error.
+bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
+ if (!parsedOptions) {
+ cg->parseCodeGenDebugOptions();
+ parsedOptions = true;
+ }
+ return !cg->compile_to_file(name, DisableOpt, DisableInline, DisableGVNLoadPRE,
+ sLastErrorString);
+}
-//
-// Used to pass extra options to the code generator
-//
-extern void
-lto_codegen_debug_options(lto_code_gen_t cg, const char * opt)
-{
+/// lto_codegen_debug_options - Used to pass extra options to the code
+/// generator.
+void lto_codegen_debug_options(lto_code_gen_t cg, const char *opt) {
cg->setCodeGenDebugOptions(opt);
}
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