Index: llvm/trunk/include/llvm/Demangle/Compiler.h =================================================================== --- llvm/trunk/include/llvm/Demangle/Compiler.h +++ llvm/trunk/include/llvm/Demangle/Compiler.h @@ -503,4 +503,22 @@ #define LLVM_ENABLE_EXCEPTIONS 1 #endif +/// \macro LLVM_PLUGIN_IMPORT +/// \brief Used to import the well-known entry point for registering loaded pass +/// plugins +#ifdef WIN32 +#define LLVM_PLUGIN_IMPORT __declspec(dllimport) +#else +#define LLVM_PLUGIN_IMPORT +#endif + +/// \macro LLVM_PLUGIN_EXPORT +/// \brief Used to export the well-known entry point for registering loaded pass +/// plugins +#ifdef WIN32 +#define LLVM_PLUGIN_EXPORT __declspec(dllexport) +#else +#define LLVM_PLUGIN_EXPORT +#endif + #endif Index: llvm/trunk/include/llvm/Passes/PassPlugin.h =================================================================== --- llvm/trunk/include/llvm/Passes/PassPlugin.h +++ llvm/trunk/include/llvm/Passes/PassPlugin.h @@ -0,0 +1,114 @@ +//===- llvm/Passes/PassPlugin.h - Public Plugin API -----------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This defines the public entry point for new-PM pass plugins. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_PASSES_PASSPLUGIN_H +#define LLVM_PASSES_PASSPLUGIN_H + +#include "llvm/ADT/StringRef.h" +#include "llvm/Support/Compiler.h" +#include "llvm/Support/DynamicLibrary.h" +#include "llvm/Support/Error.h" +#include +#include + +namespace llvm { +class PassBuilder; + +/// \macro LLVM_PLUGIN_API_VERSION +/// Identifies the API version understood by this plugin. +/// +/// When a plugin is loaded, the driver will check it's supported plugin version +/// against that of the plugin. A mismatch is an error. The supported version +/// will be incremented for ABI-breaking changes to the \c PassPluginLibraryInfo +/// struct, i.e. when callbacks are added, removed, or reordered. +#define LLVM_PLUGIN_API_VERSION 1 + +extern "C" { +/// Information about the plugin required to load its passes +/// +/// This struct defines the core interface for pass plugins and is supposed to +/// be filled out by plugin implementors. LLVM-side users of a plugin are +/// expected to use the \c PassPlugin class below to interface with it. +struct PassPluginLibraryInfo { + /// The API version understood by this plugin, usually \c + /// LLVM_PLUGIN_API_VERSION + uint32_t APIVersion; + /// A meaningful name of the plugin. + const char *PluginName; + /// The version of the plugin. + const char *PluginVersion; + + /// The callback for registering plugin passes with a \c PassBuilder + /// instance + void (*RegisterPassBuilderCallbacks)(PassBuilder &); +}; +} + +/// A loaded pass plugin. +/// +/// An instance of this class wraps a loaded pass plugin and gives access to +/// its interface defined by the \c PassPluginLibraryInfo it exposes. +class PassPlugin { +public: + /// Attempts to load a pass plugin from a given file. + /// + /// \returns Returns an error if either the library cannot be found or loaded, + /// there is no public entry point, or the plugin implements the wrong API + /// version. + static Expected Load(const std::string &Filename); + + /// Get the filename of the loaded plugin. + StringRef getFilename() const { return Filename; } + + /// Get the plugin name + StringRef getPluginName() const { return Info.PluginName; } + + /// Get the plugin version + StringRef getPluginVersion() const { return Info.PluginVersion; } + + /// Get the plugin API version + uint32_t getAPIVersion() const { return Info.APIVersion; } + + /// Invoke the PassBuilder callback registration + void registerPassBuilderCallbacks(PassBuilder &PB) const { + Info.RegisterPassBuilderCallbacks(PB); + } + +private: + PassPlugin(const std::string &Filename, const sys::DynamicLibrary &Library) + : Filename(Filename), Library(Library), Info() {} + + std::string Filename; + sys::DynamicLibrary Library; + PassPluginLibraryInfo Info; +}; +} + +/// The public entry point for a pass plugin. +/// +/// When a plugin is loaded by the driver, it will call this entry point to +/// obtain information about this plugin and about how to register its passes. +/// This function needs to be implemented by the plugin, see the example below: +/// +/// ``` +/// extern "C" ::llvm::PassPluginLibraryInfo LLVM_ATTRIBUTE_WEAK +/// LLVM_PLUGIN_EXPORT llvmGetPassPluginInfo() { +/// return { +/// LLVM_PLUGIN_API_VERSION, "MyPlugin", "v0.1", [](PassBuilder &PB) { ... } +/// }; +/// } +/// ``` +extern "C" ::llvm::PassPluginLibraryInfo LLVM_ATTRIBUTE_WEAK LLVM_PLUGIN_IMPORT +llvmGetPassPluginInfo(); + +#endif /* LLVM_PASSES_PASSPLUGIN_H */ Index: llvm/trunk/include/llvm/Support/Compiler.h =================================================================== --- llvm/trunk/include/llvm/Support/Compiler.h +++ llvm/trunk/include/llvm/Support/Compiler.h @@ -16,4 +16,5 @@ // //===----------------------------------------------------------------------===// + #include "llvm/Demangle/Compiler.h" Index: llvm/trunk/lib/Passes/CMakeLists.txt =================================================================== --- llvm/trunk/lib/Passes/CMakeLists.txt +++ llvm/trunk/lib/Passes/CMakeLists.txt @@ -1,5 +1,6 @@ add_llvm_library(LLVMPasses PassBuilder.cpp + PassPlugin.cpp ADDITIONAL_HEADER_DIRS ${LLVM_MAIN_INCLUDE_DIR}/llvm/Passes Index: llvm/trunk/lib/Passes/PassPlugin.cpp =================================================================== --- llvm/trunk/lib/Passes/PassPlugin.cpp +++ llvm/trunk/lib/Passes/PassPlugin.cpp @@ -0,0 +1,50 @@ +//===- lib/Passes/PassPluginLoader.cpp - Load Plugins for New PM Passes ---===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "llvm/Passes/PassPlugin.h" +#include "llvm/Support/raw_ostream.h" + +using namespace llvm; + +Expected PassPlugin::Load(const std::string &Filename) { + std::string Error; + auto Library = + sys::DynamicLibrary::getPermanentLibrary(Filename.c_str(), &Error); + if (!Library.isValid()) + return make_error(Twine("Could not load library '") + + Filename + "': " + Error, + inconvertibleErrorCode()); + + PassPlugin P{Filename, Library}; + auto *getDetailsFn = + Library.SearchForAddressOfSymbol("llvmGetPassPluginInfo"); + + if (!getDetailsFn) + // If the symbol isn't found, this is probably a legacy plugin, which is an + // error + return make_error(Twine("Plugin entry point not found in '") + + Filename + "'. Is this a legacy plugin?", + inconvertibleErrorCode()); + + P.Info = reinterpret_cast(getDetailsFn)(); + + if (P.Info.APIVersion != LLVM_PLUGIN_API_VERSION) + return make_error( + Twine("Wrong API version on plugin '") + Filename + "'. Got version " + + Twine(P.Info.APIVersion) + ", supported version is " + + Twine(LLVM_PLUGIN_API_VERSION) + ".", + inconvertibleErrorCode()); + + if (!P.Info.RegisterPassBuilderCallbacks) + return make_error(Twine("Empty entry callback in plugin '") + + Filename + "'.'", + inconvertibleErrorCode()); + + return P; +} Index: llvm/trunk/tools/opt/NewPMDriver.cpp =================================================================== --- llvm/trunk/tools/opt/NewPMDriver.cpp +++ llvm/trunk/tools/opt/NewPMDriver.cpp @@ -27,6 +27,7 @@ #include "llvm/IR/PassManager.h" #include "llvm/IR/Verifier.h" #include "llvm/Passes/PassBuilder.h" +#include "llvm/Passes/PassPlugin.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/ToolOutputFile.h" @@ -41,6 +42,10 @@ DebugPM("debug-pass-manager", cl::Hidden, cl::desc("Print pass management debugging information")); +static cl::list + PassPlugins("load-pass-plugin", + cl::desc("Load passes from plugin library")); + // This flag specifies a textual description of the alias analysis pipeline to // use when querying for aliasing information. It only works in concert with // the "passes" flag above. @@ -210,6 +215,18 @@ PassBuilder PB(TM, P); registerEPCallbacks(PB, VerifyEachPass, DebugPM); + // Load requested pass plugins and let them register pass builder callbacks + for (auto &PluginFN : PassPlugins) { + auto PassPlugin = PassPlugin::Load(PluginFN); + if (!PassPlugin) { + errs() << "Failed to load passes from '" << PluginFN + << "'. Request ignored.\n"; + continue; + } + + PassPlugin->registerPassBuilderCallbacks(PB); + } + // Register a callback that creates the debugify passes as needed. PB.registerPipelineParsingCallback( [](StringRef Name, ModulePassManager &MPM, Index: llvm/trunk/unittests/CMakeLists.txt =================================================================== --- llvm/trunk/unittests/CMakeLists.txt +++ llvm/trunk/unittests/CMakeLists.txt @@ -22,6 +22,7 @@ add_subdirectory(BinaryFormat) add_subdirectory(ObjectYAML) add_subdirectory(Option) +add_subdirectory(Passes) add_subdirectory(ProfileData) add_subdirectory(Support) add_subdirectory(Target) Index: llvm/trunk/unittests/Passes/CMakeLists.txt =================================================================== --- llvm/trunk/unittests/Passes/CMakeLists.txt +++ llvm/trunk/unittests/Passes/CMakeLists.txt @@ -0,0 +1,21 @@ +set(LLVM_LINK_COMPONENTS Support Passes Core) + +add_llvm_unittest(PluginsTests PluginsTest.cpp) +export_executable_symbols(PluginsTests) + +add_library(TestPlugin SHARED TestPlugin.cxx) + +set_output_directory(TestPlugin + BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR} + LIBRARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR} + ) + +set_target_properties(TestPlugin + PROPERTIES PREFIX "" + SUFFIX ".so" + ) + +llvm_map_components_to_libnames(LLVMDependencies ${LLVM_LINK_COMPONENTS}) +target_link_libraries(TestPlugin ${LLVMDependencies}) + +add_dependencies(PluginsTests TestPlugin) Index: llvm/trunk/unittests/Passes/PluginsTest.cpp =================================================================== --- llvm/trunk/unittests/Passes/PluginsTest.cpp +++ llvm/trunk/unittests/Passes/PluginsTest.cpp @@ -0,0 +1,53 @@ +//===- unittests/Passes/Plugins/PluginsTest.cpp ---------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "llvm/Analysis/CGSCCPassManager.h" +#include "llvm/IR/PassManager.h" +#include "llvm/Passes/PassBuilder.h" +#include "llvm/Passes/PassPlugin.h" +#include "llvm/Support/FileSystem.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/Path.h" +#include "llvm/Transforms/Scalar/LoopPassManager.h" +#include "gtest/gtest.h" + +#include "TestPlugin.h" + +using namespace llvm; + +void anchor() {} + +static std::string LibPath(const std::string Name = "TestPlugin") { + const std::vector &Argvs = + testing::internal::GetArgvs(); + const char *Argv0 = Argvs.size() > 0 ? Argvs[0].c_str() : "PluginsTests"; + void *Ptr = (void *)anchor; + std::string Path = sys::fs::getMainExecutable(Argv0, Ptr); + llvm::SmallString<256> Buf{sys::path::parent_path(Path)}; + sys::path::append(Buf, (Name + ".so").c_str()); + return Buf.str(); +} + +TEST(PluginsTests, LoadPlugin) { + auto PluginPath = LibPath(); + ASSERT_NE("", PluginPath); + + Expected Plugin = PassPlugin::Load(PluginPath); + ASSERT_TRUE(!!Plugin) << "Plugin path: " << PluginPath; + + ASSERT_EQ(TEST_PLUGIN_NAME, Plugin->getPluginName()); + ASSERT_EQ(TEST_PLUGIN_VERSION, Plugin->getPluginVersion()); + + PassBuilder PB; + ModulePassManager PM; + ASSERT_FALSE(PB.parsePassPipeline(PM, "plugin-pass")); + + Plugin->registerPassBuilderCallbacks(PB); + ASSERT_TRUE(PB.parsePassPipeline(PM, "plugin-pass")); +} Index: llvm/trunk/unittests/Passes/TestPlugin.h =================================================================== --- llvm/trunk/unittests/Passes/TestPlugin.h +++ llvm/trunk/unittests/Passes/TestPlugin.h @@ -0,0 +1,2 @@ +#define TEST_PLUGIN_NAME "TestPlugin" +#define TEST_PLUGIN_VERSION "0.1-unit" Index: llvm/trunk/unittests/Passes/TestPlugin.cxx =================================================================== --- llvm/trunk/unittests/Passes/TestPlugin.cxx +++ llvm/trunk/unittests/Passes/TestPlugin.cxx @@ -0,0 +1,39 @@ +//===- unittests/Passes/Plugins/Plugin.cxx --------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "llvm/Passes/PassBuilder.h" +#include "llvm/Passes/PassPlugin.h" + +#include "TestPlugin.h" + +using namespace llvm; + +struct TestModulePass : public PassInfoMixin { + PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM) { + return PreservedAnalyses::all(); + } +}; + +void registerCallbacks(PassBuilder &PB) { + PB.registerPipelineParsingCallback( + [](StringRef Name, ModulePassManager &PM, + ArrayRef InnerPipeline) { + if (Name == "plugin-pass") { + PM.addPass(TestModulePass()); + return true; + } + return false; + }); +} + +extern "C" ::llvm::PassPluginLibraryInfo LLVM_ATTRIBUTE_WEAK LLVM_PLUGIN_EXPORT +llvmGetPassPluginInfo() { + return {LLVM_PLUGIN_API_VERSION, TEST_PLUGIN_NAME, TEST_PLUGIN_VERSION, + registerCallbacks}; +}