jansvoboda11 created this revision. jansvoboda11 added reviewers: Bigcheese, dexonsmith. jansvoboda11 requested review of this revision. Herald added a project: clang. Herald added a subscriber: cfe-commits.
This patch extracts the mapping between command line option and frontend::ActionKind into a table. The table can be reused when parsing and also generating command line options. Repository: rG LLVM Github Monorepo https://reviews.llvm.org/D96269 Files: clang/lib/Frontend/CompilerInvocation.cpp
Index: clang/lib/Frontend/CompilerInvocation.cpp =================================================================== --- clang/lib/Frontend/CompilerInvocation.cpp +++ clang/lib/Frontend/CompilerInvocation.cpp @@ -2151,19 +2151,84 @@ return false; } +/// Return a table that associates command line option specifiers with the +/// frontend action. Note: The pair {frontend::PluginAction, OPT_plugin} is +/// intentionally missing, as this case is handled separately from other +/// frontend options. +static const auto &getFrontendActionTable() { + static const std::pair<frontend::ActionKind, OptSpecifier> Table[] = { + {frontend::ASTDeclList, OPT_ast_list}, + + {frontend::ASTDump, OPT_ast_dump_all_EQ}, + {frontend::ASTDump, OPT_ast_dump_all}, + {frontend::ASTDump, OPT_ast_dump_EQ}, + {frontend::ASTDump, OPT_ast_dump}, + {frontend::ASTDump, OPT_ast_dump_lookups}, + {frontend::ASTDump, OPT_ast_dump_decl_types}, + + {frontend::ASTPrint, OPT_ast_print}, + {frontend::ASTView, OPT_ast_view}, + {frontend::DumpCompilerOptions, OPT_compiler_options_dump}, + {frontend::DumpRawTokens, OPT_dump_raw_tokens}, + {frontend::DumpTokens, OPT_dump_tokens}, + {frontend::EmitAssembly, OPT_S}, + {frontend::EmitBC, OPT_emit_llvm_bc}, + {frontend::EmitHTML, OPT_emit_html}, + {frontend::EmitLLVM, OPT_emit_llvm}, + {frontend::EmitLLVMOnly, OPT_emit_llvm_only}, + {frontend::EmitCodeGenOnly, OPT_emit_codegen_only}, + {frontend::EmitCodeGenOnly, OPT_emit_codegen_only}, + {frontend::EmitObj, OPT_emit_obj}, + + {frontend::FixIt, OPT_fixit_EQ}, + {frontend::FixIt, OPT_fixit}, + + {frontend::GenerateModule, OPT_emit_module}, + {frontend::GenerateModuleInterface, OPT_emit_module_interface}, + {frontend::GenerateHeaderModule, OPT_emit_header_module}, + {frontend::GeneratePCH, OPT_emit_pch}, + {frontend::GenerateInterfaceStubs, OPT_emit_interface_stubs}, + {frontend::InitOnly, OPT_init_only}, + {frontend::ParseSyntaxOnly, OPT_fsyntax_only}, + {frontend::ModuleFileInfo, OPT_module_file_info}, + {frontend::VerifyPCH, OPT_verify_pch}, + {frontend::PrintPreamble, OPT_print_preamble}, + {frontend::PrintPreprocessedInput, OPT_E}, + {frontend::TemplightDump, OPT_templight_dump}, + {frontend::RewriteMacros, OPT_rewrite_macros}, + {frontend::RewriteObjC, OPT_rewrite_objc}, + {frontend::RewriteTest, OPT_rewrite_test}, + {frontend::RunAnalysis, OPT_analyze}, + {frontend::MigrateSource, OPT_migrate}, + {frontend::RunPreprocessorOnly, OPT_Eonly}, + {frontend::PrintDependencyDirectivesSourceMinimizerOutput, + OPT_print_dependency_directives_minimized_source}, + }; + + return Table; +} + +/// Maps command line option to frontend action. +static Optional<frontend::ActionKind> getFrontendAction(OptSpecifier &Opt) { + for (const auto &ActionOpt : getFrontendActionTable()) + if (ActionOpt.second == Opt) + return ActionOpt.first; + + return None; +} + static bool ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, DiagnosticsEngine &Diags, bool &IsHeaderFile) { unsigned NumErrorsBefore = Diags.getNumErrors(); Opts.ProgramAction = frontend::ParseSyntaxOnly; if (const Arg *A = Args.getLastArg(OPT_Action_Group)) { - switch (A->getOption().getID()) { - default: - llvm_unreachable("Invalid option in group!"); - case OPT_ast_list: - Opts.ProgramAction = frontend::ASTDeclList; break; - case OPT_ast_dump_all_EQ: - case OPT_ast_dump_EQ: { + OptSpecifier Opt = OptSpecifier(A->getOption().getID()); + Optional<frontend::ActionKind> ProgramAction = getFrontendAction(Opt); + assert(ProgramAction && "Option specifier not in Action_Group."); + + if (ProgramAction == frontend::ASTDump && + (Opt == OPT_ast_dump_all_EQ || Opt == OPT_ast_dump_EQ)) { unsigned Val = llvm::StringSwitch<unsigned>(A->getValue()) .CaseLower("default", ADOF_Default) .CaseLower("json", ADOF_JSON) @@ -2176,51 +2241,12 @@ << A->getAsString(Args) << A->getValue(); Opts.ASTDumpFormat = ADOF_Default; } - LLVM_FALLTHROUGH; } - case OPT_ast_dump: - case OPT_ast_dump_all: - case OPT_ast_dump_lookups: - case OPT_ast_dump_decl_types: - Opts.ProgramAction = frontend::ASTDump; break; - case OPT_ast_print: - Opts.ProgramAction = frontend::ASTPrint; break; - case OPT_ast_view: - Opts.ProgramAction = frontend::ASTView; break; - case OPT_compiler_options_dump: - Opts.ProgramAction = frontend::DumpCompilerOptions; break; - case OPT_dump_raw_tokens: - Opts.ProgramAction = frontend::DumpRawTokens; break; - case OPT_dump_tokens: - Opts.ProgramAction = frontend::DumpTokens; break; - case OPT_S: - Opts.ProgramAction = frontend::EmitAssembly; break; - case OPT_emit_llvm_bc: - Opts.ProgramAction = frontend::EmitBC; break; - case OPT_emit_html: - Opts.ProgramAction = frontend::EmitHTML; break; - case OPT_emit_llvm: - Opts.ProgramAction = frontend::EmitLLVM; break; - case OPT_emit_llvm_only: - Opts.ProgramAction = frontend::EmitLLVMOnly; break; - case OPT_emit_codegen_only: - Opts.ProgramAction = frontend::EmitCodeGenOnly; break; - case OPT_emit_obj: - Opts.ProgramAction = frontend::EmitObj; break; - case OPT_fixit_EQ: + + if (ProgramAction == frontend::FixIt && Opt == OPT_fixit_EQ) Opts.FixItSuffix = A->getValue(); - LLVM_FALLTHROUGH; - case OPT_fixit: - Opts.ProgramAction = frontend::FixIt; break; - case OPT_emit_module: - Opts.ProgramAction = frontend::GenerateModule; break; - case OPT_emit_module_interface: - Opts.ProgramAction = frontend::GenerateModuleInterface; break; - case OPT_emit_header_module: - Opts.ProgramAction = frontend::GenerateHeaderModule; break; - case OPT_emit_pch: - Opts.ProgramAction = frontend::GeneratePCH; break; - case OPT_emit_interface_stubs: { + + if (ProgramAction == frontend::GenerateInterfaceStubs) { StringRef ArgStr = Args.hasArg(OPT_interface_stub_version_EQ) ? Args.getLastArgValue(OPT_interface_stub_version_EQ) @@ -2235,6 +2261,7 @@ << "Must specify a valid interface stub format type, ie: " "-interface-stub-version=experimental-ifs-v2" << ErrorMessage; + ProgramAction = frontend::ParseSyntaxOnly; } else if (!ArgStr.startswith("experimental-ifs-")) { std::string ErrorMessage = "Invalid interface stub format: " + ArgStr.str() + "."; @@ -2242,42 +2269,11 @@ << "Must specify a valid interface stub format type, ie: " "-interface-stub-version=experimental-ifs-v2" << ErrorMessage; - } else { - Opts.ProgramAction = frontend::GenerateInterfaceStubs; + ProgramAction = frontend::ParseSyntaxOnly; } - break; - } - case OPT_init_only: - Opts.ProgramAction = frontend::InitOnly; break; - case OPT_fsyntax_only: - Opts.ProgramAction = frontend::ParseSyntaxOnly; break; - case OPT_module_file_info: - Opts.ProgramAction = frontend::ModuleFileInfo; break; - case OPT_verify_pch: - Opts.ProgramAction = frontend::VerifyPCH; break; - case OPT_print_preamble: - Opts.ProgramAction = frontend::PrintPreamble; break; - case OPT_E: - Opts.ProgramAction = frontend::PrintPreprocessedInput; break; - case OPT_templight_dump: - Opts.ProgramAction = frontend::TemplightDump; break; - case OPT_rewrite_macros: - Opts.ProgramAction = frontend::RewriteMacros; break; - case OPT_rewrite_objc: - Opts.ProgramAction = frontend::RewriteObjC; break; - case OPT_rewrite_test: - Opts.ProgramAction = frontend::RewriteTest; break; - case OPT_analyze: - Opts.ProgramAction = frontend::RunAnalysis; break; - case OPT_migrate: - Opts.ProgramAction = frontend::MigrateSource; break; - case OPT_Eonly: - Opts.ProgramAction = frontend::RunPreprocessorOnly; break; - case OPT_print_dependency_directives_minimized_source: - Opts.ProgramAction = - frontend::PrintDependencyDirectivesSourceMinimizerOutput; - break; } + + Opts.ProgramAction = *ProgramAction; } if (const Arg* A = Args.getLastArg(OPT_plugin)) {
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