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We used to always vectorize (slp and loop vectorize) in the LTO pass pipeline. r220345 changed it so that we used the PassManager's fields 'LoopVectorize' and 'SLPVectorize' out of the desire to be able to disable vectorization using the cl::opt flags 'vectorize-loops'/'slp-vectorize' which the before mentioned fields default to. Unfortunately, this turns off vectorization because those fields default to false. This commit adds flags to the LTO library to disable lto vectorization which reconciles the desire to optionally disable vectorization during LTO and the desired behavior of defaulting to enabled vectorization. We really want tools to set PassManager flags directly to enable/disable vectorization and not go the route via cl::opt flags *in* PassManagerBuilder.cpp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220652 91177308-0d34-0410-b5e6-96231b3b80d8
277 lines
9.0 KiB
C++
277 lines
9.0 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 "llvm/CodeGen/CommandFlags.h"
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#include "llvm/LTO/LTOCodeGenerator.h"
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#include "llvm/LTO/LTOModule.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/TargetSelect.h"
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// extra command-line flags needed for LTOCodeGenerator
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static cl::opt<bool>
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DisableOpt("disable-opt", cl::init(false),
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cl::desc("Do not run any optimization passes"));
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static cl::opt<bool>
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DisableInline("disable-inlining", cl::init(false),
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cl::desc("Do not run the inliner pass"));
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static cl::opt<bool>
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DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
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cl::desc("Do not run the GVN load PRE pass"));
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static cl::opt<bool>
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DisableLTOVectorization("disable-lto-vectorization", cl::init(false),
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cl::desc("Do not run loop or slp vectorization during LTO"));
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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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// Holds the initialization state of the LTO module.
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// *** Not thread safe ***
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static bool initialized = false;
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// Holds the command-line option parsing state of the LTO module.
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static bool parsedOptions = false;
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// Initialize the configured targets if they have not been initialized.
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static void lto_initialize() {
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if (!initialized) {
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InitializeAllTargetInfos();
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InitializeAllTargets();
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InitializeAllTargetMCs();
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InitializeAllAsmParsers();
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InitializeAllAsmPrinters();
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InitializeAllDisassemblers();
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initialized = true;
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}
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}
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DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LTOCodeGenerator, lto_code_gen_t)
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DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LTOModule, lto_module_t)
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// Convert the subtarget features into a string to pass to LTOCodeGenerator.
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static void lto_add_attrs(lto_code_gen_t cg) {
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LTOCodeGenerator *CG = unwrap(cg);
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if (MAttrs.size()) {
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std::string attrs;
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for (unsigned i = 0; i < MAttrs.size(); ++i) {
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if (i > 0)
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attrs.append(",");
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attrs.append(MAttrs[i]);
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}
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CG->setAttr(attrs.c_str());
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}
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}
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extern const char* lto_get_version() {
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return LTOCodeGenerator::getVersionString();
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}
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const char* lto_get_error_message() {
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return sLastErrorString.c_str();
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}
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bool lto_module_is_object_file(const char* path) {
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return LTOModule::isBitcodeFile(path);
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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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ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer = MemoryBuffer::getFile(path);
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if (!Buffer)
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return false;
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return LTOModule::isBitcodeForTarget(Buffer->get(), target_triplet_prefix);
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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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return LTOModule::isBitcodeFile(mem, length);
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}
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bool
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lto_module_is_object_file_in_memory_for_target(const void* mem,
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size_t length,
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const char* target_triplet_prefix) {
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std::unique_ptr<MemoryBuffer> buffer(LTOModule::makeBuffer(mem, length));
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if (!buffer)
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return false;
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return LTOModule::isBitcodeForTarget(buffer.get(), target_triplet_prefix);
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}
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lto_module_t lto_module_create(const char* path) {
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lto_initialize();
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llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
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return wrap(LTOModule::createFromFile(path, Options, sLastErrorString));
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}
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lto_module_t lto_module_create_from_fd(int fd, const char *path, size_t size) {
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lto_initialize();
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llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
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return wrap(
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LTOModule::createFromOpenFile(fd, path, size, Options, sLastErrorString));
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}
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lto_module_t lto_module_create_from_fd_at_offset(int fd, const char *path,
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size_t file_size,
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size_t map_size,
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off_t offset) {
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lto_initialize();
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llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
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return wrap(LTOModule::createFromOpenFileSlice(fd, path, map_size, offset,
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Options, sLastErrorString));
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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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lto_initialize();
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llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
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return wrap(LTOModule::createFromBuffer(mem, length, Options, sLastErrorString));
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}
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lto_module_t lto_module_create_from_memory_with_path(const void* mem,
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size_t length,
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const char *path) {
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lto_initialize();
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llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
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return wrap(
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LTOModule::createFromBuffer(mem, length, Options, sLastErrorString, path));
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}
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void lto_module_dispose(lto_module_t mod) { delete unwrap(mod); }
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const char* lto_module_get_target_triple(lto_module_t mod) {
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return unwrap(mod)->getTargetTriple().c_str();
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}
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void lto_module_set_target_triple(lto_module_t mod, const char *triple) {
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return unwrap(mod)->setTargetTriple(triple);
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}
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unsigned int lto_module_get_num_symbols(lto_module_t mod) {
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return unwrap(mod)->getSymbolCount();
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}
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const char* lto_module_get_symbol_name(lto_module_t mod, unsigned int index) {
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return unwrap(mod)->getSymbolName(index);
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}
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lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
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unsigned int index) {
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return unwrap(mod)->getSymbolAttributes(index);
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}
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unsigned int lto_module_get_num_deplibs(lto_module_t mod) {
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return unwrap(mod)->getDependentLibraryCount();
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}
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const char* lto_module_get_deplib(lto_module_t mod, unsigned int index) {
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return unwrap(mod)->getDependentLibrary(index);
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}
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unsigned int lto_module_get_num_linkeropts(lto_module_t mod) {
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return unwrap(mod)->getLinkerOptCount();
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}
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const char* lto_module_get_linkeropt(lto_module_t mod, unsigned int index) {
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return unwrap(mod)->getLinkerOpt(index);
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}
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void lto_codegen_set_diagnostic_handler(lto_code_gen_t cg,
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lto_diagnostic_handler_t diag_handler,
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void *ctxt) {
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unwrap(cg)->setDiagnosticHandler(diag_handler, ctxt);
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}
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lto_code_gen_t lto_codegen_create(void) {
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lto_initialize();
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TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
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LTOCodeGenerator *CodeGen = new LTOCodeGenerator();
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if (CodeGen)
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CodeGen->setTargetOptions(Options);
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return wrap(CodeGen);
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}
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void lto_codegen_dispose(lto_code_gen_t cg) { delete unwrap(cg); }
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bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod) {
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return !unwrap(cg)->addModule(unwrap(mod));
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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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unwrap(cg)->setDebugInfo(debug);
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return false;
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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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unwrap(cg)->setCodePICModel(model);
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return false;
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}
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void lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu) {
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return unwrap(cg)->setCpu(cpu);
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}
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void lto_codegen_set_assembler_path(lto_code_gen_t cg, const char *path) {
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// In here only for backwards compatibility. We use MC now.
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}
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void lto_codegen_set_assembler_args(lto_code_gen_t cg, const char **args,
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int nargs) {
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// In here only for backwards compatibility. We use MC now.
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}
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void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg,
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const char *symbol) {
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unwrap(cg)->addMustPreserveSymbol(symbol);
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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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if (!parsedOptions) {
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unwrap(cg)->parseCodeGenDebugOptions();
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lto_add_attrs(cg);
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parsedOptions = true;
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}
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return !unwrap(cg)->writeMergedModules(path, sLastErrorString);
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}
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const void *lto_codegen_compile(lto_code_gen_t cg, size_t *length) {
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if (!parsedOptions) {
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unwrap(cg)->parseCodeGenDebugOptions();
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lto_add_attrs(cg);
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parsedOptions = true;
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}
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return unwrap(cg)->compile(length, DisableOpt, DisableInline,
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DisableGVNLoadPRE, DisableLTOVectorization,
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sLastErrorString);
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}
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bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
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if (!parsedOptions) {
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unwrap(cg)->parseCodeGenDebugOptions();
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lto_add_attrs(cg);
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parsedOptions = true;
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}
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return !unwrap(cg)->compile_to_file(
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name, DisableOpt, DisableInline, DisableGVNLoadPRE,
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DisableLTOVectorization, sLastErrorString);
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}
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void lto_codegen_debug_options(lto_code_gen_t cg, const char *opt) {
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unwrap(cg)->setCodeGenDebugOptions(opt);
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}
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