xref: /llvm-project/flang/lib/Frontend/CompilerInvocation.cpp (revision 8e14c6c172b122203f46a9ad114d51c74535cbb7) 
1 //===- CompilerInvocation.cpp ---------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // Coding style: https://mlir.llvm.org/getting_started/DeveloperGuide/
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "flang/Frontend/CompilerInvocation.h"
14 #include "flang/Common/Fortran-features.h"
15 #include "flang/Common/OpenMP-features.h"
16 #include "flang/Common/Version.h"
17 #include "flang/Frontend/CodeGenOptions.h"
18 #include "flang/Frontend/PreprocessorOptions.h"
19 #include "flang/Frontend/TargetOptions.h"
20 #include "flang/Semantics/semantics.h"
21 #include "flang/Tools/TargetSetup.h"
22 #include "flang/Version.inc"
23 #include "clang/Basic/AllDiagnostics.h"
24 #include "clang/Basic/DiagnosticDriver.h"
25 #include "clang/Basic/DiagnosticOptions.h"
26 #include "clang/Driver/DriverDiagnostic.h"
27 #include "clang/Driver/OptionUtils.h"
28 #include "clang/Driver/Options.h"
29 #include "llvm/ADT/StringRef.h"
30 #include "llvm/ADT/StringSwitch.h"
31 #include "llvm/Frontend/Debug/Options.h"
32 #include "llvm/Option/Arg.h"
33 #include "llvm/Option/ArgList.h"
34 #include "llvm/Option/OptTable.h"
35 #include "llvm/Support/CodeGen.h"
36 #include "llvm/Support/FileSystem.h"
37 #include "llvm/Support/FileUtilities.h"
38 #include "llvm/Support/Path.h"
39 #include "llvm/Support/Process.h"
40 #include "llvm/Support/raw_ostream.h"
41 #include "llvm/TargetParser/Host.h"
42 #include "llvm/TargetParser/Triple.h"
43 #include <algorithm>
44 #include <cstdlib>
45 #include <memory>
46 #include <optional>
47 
48 using namespace Fortran::frontend;
49 
50 //===----------------------------------------------------------------------===//
51 // Initialization.
52 //===----------------------------------------------------------------------===//
53 CompilerInvocationBase::CompilerInvocationBase()
54     : diagnosticOpts(new clang::DiagnosticOptions()),
55       preprocessorOpts(new PreprocessorOptions()) {}
56 
57 CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &x)
58     : diagnosticOpts(new clang::DiagnosticOptions(x.getDiagnosticOpts())),
59       preprocessorOpts(new PreprocessorOptions(x.getPreprocessorOpts())) {}
60 
61 CompilerInvocationBase::~CompilerInvocationBase() = default;
62 
63 //===----------------------------------------------------------------------===//
64 // Deserialization (from args)
65 //===----------------------------------------------------------------------===//
66 static bool parseShowColorsArgs(const llvm::opt::ArgList &args,
67                                 bool defaultColor = true) {
68   // Color diagnostics default to auto ("on" if terminal supports) in the
69   // compiler driver `flang` but default to off in the frontend driver
70   // `flang -fc1`, needing an explicit OPT_fdiagnostics_color.
71   // Support both clang's -f[no-]color-diagnostics and gcc's
72   // -f[no-]diagnostics-colors[=never|always|auto].
73   enum {
74     Colors_On,
75     Colors_Off,
76     Colors_Auto
77   } showColors = defaultColor ? Colors_Auto : Colors_Off;
78 
79   for (auto *a : args) {
80     const llvm::opt::Option &opt = a->getOption();
81     if (opt.matches(clang::driver::options::OPT_fcolor_diagnostics)) {
82       showColors = Colors_On;
83     } else if (opt.matches(clang::driver::options::OPT_fno_color_diagnostics)) {
84       showColors = Colors_Off;
85     } else if (opt.matches(clang::driver::options::OPT_fdiagnostics_color_EQ)) {
86       llvm::StringRef value(a->getValue());
87       if (value == "always")
88         showColors = Colors_On;
89       else if (value == "never")
90         showColors = Colors_Off;
91       else if (value == "auto")
92         showColors = Colors_Auto;
93     }
94   }
95 
96   return showColors == Colors_On ||
97          (showColors == Colors_Auto &&
98           llvm::sys::Process::StandardErrHasColors());
99 }
100 
101 /// Extracts the optimisation level from \a args.
102 static unsigned getOptimizationLevel(llvm::opt::ArgList &args,
103                                      clang::DiagnosticsEngine &diags) {
104   unsigned defaultOpt = 0;
105 
106   if (llvm::opt::Arg *a =
107           args.getLastArg(clang::driver::options::OPT_O_Group)) {
108     if (a->getOption().matches(clang::driver::options::OPT_O0))
109       return 0;
110 
111     assert(a->getOption().matches(clang::driver::options::OPT_O));
112 
113     return getLastArgIntValue(args, clang::driver::options::OPT_O, defaultOpt,
114                               diags);
115   }
116 
117   return defaultOpt;
118 }
119 
120 bool Fortran::frontend::parseDiagnosticArgs(clang::DiagnosticOptions &opts,
121                                             llvm::opt::ArgList &args) {
122   opts.ShowColors = parseShowColorsArgs(args);
123 
124   return true;
125 }
126 
127 static bool parseDebugArgs(Fortran::frontend::CodeGenOptions &opts,
128                            llvm::opt::ArgList &args,
129                            clang::DiagnosticsEngine &diags) {
130   using DebugInfoKind = llvm::codegenoptions::DebugInfoKind;
131   if (llvm::opt::Arg *arg =
132           args.getLastArg(clang::driver::options::OPT_debug_info_kind_EQ)) {
133     std::optional<DebugInfoKind> val =
134         llvm::StringSwitch<std::optional<DebugInfoKind>>(arg->getValue())
135             .Case("line-tables-only", llvm::codegenoptions::DebugLineTablesOnly)
136             .Case("line-directives-only",
137                   llvm::codegenoptions::DebugDirectivesOnly)
138             .Case("constructor", llvm::codegenoptions::DebugInfoConstructor)
139             .Case("limited", llvm::codegenoptions::LimitedDebugInfo)
140             .Case("standalone", llvm::codegenoptions::FullDebugInfo)
141             .Case("unused-types", llvm::codegenoptions::UnusedTypeInfo)
142             .Default(std::nullopt);
143     if (!val.has_value()) {
144       diags.Report(clang::diag::err_drv_invalid_value)
145           << arg->getAsString(args) << arg->getValue();
146       return false;
147     }
148     opts.setDebugInfo(val.value());
149     if (val != llvm::codegenoptions::DebugLineTablesOnly &&
150         val != llvm::codegenoptions::FullDebugInfo &&
151         val != llvm::codegenoptions::NoDebugInfo) {
152       const auto debugWarning = diags.getCustomDiagID(
153           clang::DiagnosticsEngine::Warning, "Unsupported debug option: %0");
154       diags.Report(debugWarning) << arg->getValue();
155     }
156   }
157   return true;
158 }
159 
160 static bool parseVectorLibArg(Fortran::frontend::CodeGenOptions &opts,
161                               llvm::opt::ArgList &args,
162                               clang::DiagnosticsEngine &diags) {
163   llvm::opt::Arg *arg = args.getLastArg(clang::driver::options::OPT_fveclib);
164   if (!arg)
165     return true;
166 
167   using VectorLibrary = llvm::driver::VectorLibrary;
168   std::optional<VectorLibrary> val =
169       llvm::StringSwitch<std::optional<VectorLibrary>>(arg->getValue())
170           .Case("Accelerate", VectorLibrary::Accelerate)
171           .Case("LIBMVEC", VectorLibrary::LIBMVEC)
172           .Case("MASSV", VectorLibrary::MASSV)
173           .Case("SVML", VectorLibrary::SVML)
174           .Case("SLEEF", VectorLibrary::SLEEF)
175           .Case("Darwin_libsystem_m", VectorLibrary::Darwin_libsystem_m)
176           .Case("ArmPL", VectorLibrary::ArmPL)
177           .Case("NoLibrary", VectorLibrary::NoLibrary)
178           .Default(std::nullopt);
179   if (!val.has_value()) {
180     diags.Report(clang::diag::err_drv_invalid_value)
181         << arg->getAsString(args) << arg->getValue();
182     return false;
183   }
184   opts.setVecLib(val.value());
185   return true;
186 }
187 
188 // Generate an OptRemark object containing info on if the -Rgroup
189 // specified is enabled or not.
190 static CodeGenOptions::OptRemark
191 parseOptimizationRemark(clang::DiagnosticsEngine &diags,
192                         llvm::opt::ArgList &args, llvm::opt::OptSpecifier optEq,
193                         llvm::StringRef remarkOptName) {
194   assert((remarkOptName == "pass" || remarkOptName == "pass-missed" ||
195           remarkOptName == "pass-analysis") &&
196          "Unsupported remark option name provided.");
197   CodeGenOptions::OptRemark result;
198 
199   for (llvm::opt::Arg *a : args) {
200     if (a->getOption().matches(clang::driver::options::OPT_R_Joined)) {
201       llvm::StringRef value = a->getValue();
202 
203       if (value == remarkOptName) {
204         result.Kind = CodeGenOptions::RemarkKind::RK_Enabled;
205         // Enable everything
206         result.Pattern = ".*";
207         result.Regex = std::make_shared<llvm::Regex>(result.Pattern);
208 
209       } else if (value.split('-') ==
210                  std::make_pair(llvm::StringRef("no"), remarkOptName)) {
211         result.Kind = CodeGenOptions::RemarkKind::RK_Disabled;
212         // Disable everything
213         result.Pattern = "";
214         result.Regex = nullptr;
215       }
216     } else if (a->getOption().matches(optEq)) {
217       result.Kind = CodeGenOptions::RemarkKind::RK_WithPattern;
218       result.Pattern = a->getValue();
219       result.Regex = std::make_shared<llvm::Regex>(result.Pattern);
220       std::string regexError;
221 
222       if (!result.Regex->isValid(regexError)) {
223         diags.Report(clang::diag::err_drv_optimization_remark_pattern)
224             << regexError << a->getAsString(args);
225         return CodeGenOptions::OptRemark();
226       }
227     }
228   }
229   return result;
230 }
231 
232 static void parseCodeGenArgs(Fortran::frontend::CodeGenOptions &opts,
233                              llvm::opt::ArgList &args,
234                              clang::DiagnosticsEngine &diags) {
235   opts.OptimizationLevel = getOptimizationLevel(args, diags);
236 
237   if (args.hasFlag(clang::driver::options::OPT_fdebug_pass_manager,
238                    clang::driver::options::OPT_fno_debug_pass_manager, false))
239     opts.DebugPassManager = 1;
240 
241   if (args.hasFlag(clang::driver::options::OPT_fstack_arrays,
242                    clang::driver::options::OPT_fno_stack_arrays, false))
243     opts.StackArrays = 1;
244 
245   if (args.hasFlag(clang::driver::options::OPT_floop_versioning,
246                    clang::driver::options::OPT_fno_loop_versioning, false))
247     opts.LoopVersioning = 1;
248 
249   opts.AliasAnalysis = opts.OptimizationLevel > 0;
250 
251   // -mframe-pointer=none/non-leaf/all option.
252   if (const llvm::opt::Arg *a =
253           args.getLastArg(clang::driver::options::OPT_mframe_pointer_EQ)) {
254     std::optional<llvm::FramePointerKind> val =
255         llvm::StringSwitch<std::optional<llvm::FramePointerKind>>(a->getValue())
256             .Case("none", llvm::FramePointerKind::None)
257             .Case("non-leaf", llvm::FramePointerKind::NonLeaf)
258             .Case("all", llvm::FramePointerKind::All)
259             .Default(std::nullopt);
260 
261     if (!val.has_value()) {
262       diags.Report(clang::diag::err_drv_invalid_value)
263           << a->getAsString(args) << a->getValue();
264     } else
265       opts.setFramePointer(val.value());
266   }
267 
268   for (auto *a : args.filtered(clang::driver::options::OPT_fpass_plugin_EQ))
269     opts.LLVMPassPlugins.push_back(a->getValue());
270 
271   // -fembed-offload-object option
272   for (auto *a :
273        args.filtered(clang::driver::options::OPT_fembed_offload_object_EQ))
274     opts.OffloadObjects.push_back(a->getValue());
275 
276   // -flto=full/thin option.
277   if (const llvm::opt::Arg *a =
278           args.getLastArg(clang::driver::options::OPT_flto_EQ)) {
279     llvm::StringRef s = a->getValue();
280     assert((s == "full" || s == "thin") && "Unknown LTO mode.");
281     if (s == "full")
282       opts.PrepareForFullLTO = true;
283     else
284       opts.PrepareForThinLTO = true;
285   }
286 
287   if (const llvm::opt::Arg *a = args.getLastArg(
288           clang::driver::options::OPT_mcode_object_version_EQ)) {
289     llvm::StringRef s = a->getValue();
290     if (s == "6")
291       opts.CodeObjectVersion = llvm::CodeObjectVersionKind::COV_6;
292     if (s == "5")
293       opts.CodeObjectVersion = llvm::CodeObjectVersionKind::COV_5;
294     if (s == "4")
295       opts.CodeObjectVersion = llvm::CodeObjectVersionKind::COV_4;
296     if (s == "none")
297       opts.CodeObjectVersion = llvm::CodeObjectVersionKind::COV_None;
298   }
299 
300   // -f[no-]save-optimization-record[=<format>]
301   if (const llvm::opt::Arg *a =
302           args.getLastArg(clang::driver::options::OPT_opt_record_file))
303     opts.OptRecordFile = a->getValue();
304 
305   // Optimization file format. Defaults to yaml
306   if (const llvm::opt::Arg *a =
307           args.getLastArg(clang::driver::options::OPT_opt_record_format))
308     opts.OptRecordFormat = a->getValue();
309 
310   // Specifies, using a regex, which successful optimization passes(middle and
311   // backend), to include in the final optimization record file generated. If
312   // not provided -fsave-optimization-record will include all passes.
313   if (const llvm::opt::Arg *a =
314           args.getLastArg(clang::driver::options::OPT_opt_record_passes))
315     opts.OptRecordPasses = a->getValue();
316 
317   // Create OptRemark that allows printing of all successful optimization
318   // passes applied.
319   opts.OptimizationRemark =
320       parseOptimizationRemark(diags, args, clang::driver::options::OPT_Rpass_EQ,
321                               /*remarkOptName=*/"pass");
322 
323   // Create OptRemark that allows all missed optimization passes to be printed.
324   opts.OptimizationRemarkMissed = parseOptimizationRemark(
325       diags, args, clang::driver::options::OPT_Rpass_missed_EQ,
326       /*remarkOptName=*/"pass-missed");
327 
328   // Create OptRemark that allows all optimization decisions made by LLVM
329   // to be printed.
330   opts.OptimizationRemarkAnalysis = parseOptimizationRemark(
331       diags, args, clang::driver::options::OPT_Rpass_analysis_EQ,
332       /*remarkOptName=*/"pass-analysis");
333 
334   if (opts.getDebugInfo() == llvm::codegenoptions::NoDebugInfo) {
335     // If the user requested a flag that requires source locations available in
336     // the backend, make sure that the backend tracks source location
337     // information.
338     bool needLocTracking = !opts.OptRecordFile.empty() ||
339                            !opts.OptRecordPasses.empty() ||
340                            !opts.OptRecordFormat.empty() ||
341                            opts.OptimizationRemark.hasValidPattern() ||
342                            opts.OptimizationRemarkMissed.hasValidPattern() ||
343                            opts.OptimizationRemarkAnalysis.hasValidPattern();
344 
345     if (needLocTracking)
346       opts.setDebugInfo(llvm::codegenoptions::LocTrackingOnly);
347   }
348 
349   if (auto *a = args.getLastArg(clang::driver::options::OPT_save_temps_EQ))
350     opts.SaveTempsDir = a->getValue();
351 
352   // -record-command-line option.
353   if (const llvm::opt::Arg *a =
354           args.getLastArg(clang::driver::options::OPT_record_command_line)) {
355     opts.RecordCommandLine = a->getValue();
356   }
357 
358   // -mlink-builtin-bitcode
359   for (auto *a :
360        args.filtered(clang::driver::options::OPT_mlink_builtin_bitcode))
361     opts.BuiltinBCLibs.push_back(a->getValue());
362 
363   // -mrelocation-model option.
364   if (const llvm::opt::Arg *a =
365           args.getLastArg(clang::driver::options::OPT_mrelocation_model)) {
366     llvm::StringRef modelName = a->getValue();
367     auto relocModel =
368         llvm::StringSwitch<std::optional<llvm::Reloc::Model>>(modelName)
369             .Case("static", llvm::Reloc::Static)
370             .Case("pic", llvm::Reloc::PIC_)
371             .Case("dynamic-no-pic", llvm::Reloc::DynamicNoPIC)
372             .Case("ropi", llvm::Reloc::ROPI)
373             .Case("rwpi", llvm::Reloc::RWPI)
374             .Case("ropi-rwpi", llvm::Reloc::ROPI_RWPI)
375             .Default(std::nullopt);
376     if (relocModel.has_value())
377       opts.setRelocationModel(*relocModel);
378     else
379       diags.Report(clang::diag::err_drv_invalid_value)
380           << a->getAsString(args) << modelName;
381   }
382 
383   // -pic-level and -pic-is-pie option.
384   if (int picLevel = getLastArgIntValue(
385           args, clang::driver::options::OPT_pic_level, 0, diags)) {
386     if (picLevel > 2)
387       diags.Report(clang::diag::err_drv_invalid_value)
388           << args.getLastArg(clang::driver::options::OPT_pic_level)
389                  ->getAsString(args)
390           << picLevel;
391 
392     opts.PICLevel = picLevel;
393     if (args.hasArg(clang::driver::options::OPT_pic_is_pie))
394       opts.IsPIE = 1;
395   }
396 
397   // -mcmodel option.
398   if (const llvm::opt::Arg *a =
399           args.getLastArg(clang::driver::options::OPT_mcmodel_EQ)) {
400     llvm::StringRef modelName = a->getValue();
401     std::optional<llvm::CodeModel::Model> codeModel = getCodeModel(modelName);
402 
403     if (codeModel.has_value())
404       opts.CodeModel = modelName;
405     else
406       diags.Report(clang::diag::err_drv_invalid_value)
407           << a->getAsString(args) << modelName;
408   }
409 
410   if (const llvm::opt::Arg *arg = args.getLastArg(
411           clang::driver::options::OPT_mlarge_data_threshold_EQ)) {
412     uint64_t LDT;
413     if (llvm::StringRef(arg->getValue()).getAsInteger(/*Radix=*/10, LDT)) {
414       diags.Report(clang::diag::err_drv_invalid_value)
415           << arg->getSpelling() << arg->getValue();
416     }
417     opts.LargeDataThreshold = LDT;
418   }
419 
420   // This option is compatible with -f[no-]underscoring in gfortran.
421   if (args.hasFlag(clang::driver::options::OPT_fno_underscoring,
422                    clang::driver::options::OPT_funderscoring, false)) {
423     opts.Underscoring = 0;
424   }
425 }
426 
427 /// Parses all target input arguments and populates the target
428 /// options accordingly.
429 ///
430 /// \param [in] opts The target options instance to update
431 /// \param [in] args The list of input arguments (from the compiler invocation)
432 static void parseTargetArgs(TargetOptions &opts, llvm::opt::ArgList &args) {
433   if (const llvm::opt::Arg *a =
434           args.getLastArg(clang::driver::options::OPT_triple))
435     opts.triple = a->getValue();
436 
437   if (const llvm::opt::Arg *a =
438           args.getLastArg(clang::driver::options::OPT_target_cpu))
439     opts.cpu = a->getValue();
440 
441   if (const llvm::opt::Arg *a =
442           args.getLastArg(clang::driver::options::OPT_tune_cpu))
443     opts.cpuToTuneFor = a->getValue();
444 
445   for (const llvm::opt::Arg *currentArg :
446        args.filtered(clang::driver::options::OPT_target_feature))
447     opts.featuresAsWritten.emplace_back(currentArg->getValue());
448 
449   if (args.hasArg(clang::driver::options::OPT_fdisable_real_10))
450     opts.disabledRealKinds.push_back(10);
451 
452   if (args.hasArg(clang::driver::options::OPT_fdisable_real_3))
453     opts.disabledRealKinds.push_back(3);
454 
455   if (args.hasArg(clang::driver::options::OPT_fdisable_integer_2))
456     opts.disabledIntegerKinds.push_back(2);
457 
458   if (args.hasArg(clang::driver::options::OPT_fdisable_integer_16))
459     opts.disabledIntegerKinds.push_back(16);
460 
461   if (const llvm::opt::Arg *a =
462           args.getLastArg(clang::driver::options::OPT_mabi_EQ)) {
463     llvm::StringRef V = a->getValue();
464     if (V == "vec-extabi") {
465       opts.EnableAIXExtendedAltivecABI = true;
466     } else if (V == "vec-default") {
467       opts.EnableAIXExtendedAltivecABI = false;
468     }
469   }
470 }
471 // Tweak the frontend configuration based on the frontend action
472 static void setUpFrontendBasedOnAction(FrontendOptions &opts) {
473   if (opts.programAction == DebugDumpParsingLog)
474     opts.instrumentedParse = true;
475 
476   if (opts.programAction == DebugDumpProvenance ||
477       opts.programAction == Fortran::frontend::GetDefinition)
478     opts.needProvenanceRangeToCharBlockMappings = true;
479 }
480 
481 /// Parse the argument specified for the -fconvert=<value> option
482 static std::optional<const char *> parseConvertArg(const char *s) {
483   return llvm::StringSwitch<std::optional<const char *>>(s)
484       .Case("unknown", "UNKNOWN")
485       .Case("native", "NATIVE")
486       .Case("little-endian", "LITTLE_ENDIAN")
487       .Case("big-endian", "BIG_ENDIAN")
488       .Case("swap", "SWAP")
489       .Default(std::nullopt);
490 }
491 
492 static bool parseFrontendArgs(FrontendOptions &opts, llvm::opt::ArgList &args,
493                               clang::DiagnosticsEngine &diags) {
494   unsigned numErrorsBefore = diags.getNumErrors();
495 
496   // By default the frontend driver creates a ParseSyntaxOnly action.
497   opts.programAction = ParseSyntaxOnly;
498 
499   // Treat multiple action options as an invocation error. Note that `clang
500   // -cc1` does accept multiple action options, but will only consider the
501   // rightmost one.
502   if (args.hasMultipleArgs(clang::driver::options::OPT_Action_Group)) {
503     const unsigned diagID = diags.getCustomDiagID(
504         clang::DiagnosticsEngine::Error, "Only one action option is allowed");
505     diags.Report(diagID);
506     return false;
507   }
508 
509   // Identify the action (i.e. opts.ProgramAction)
510   if (const llvm::opt::Arg *a =
511           args.getLastArg(clang::driver::options::OPT_Action_Group)) {
512     switch (a->getOption().getID()) {
513     default: {
514       llvm_unreachable("Invalid option in group!");
515     }
516     case clang::driver::options::OPT_test_io:
517       opts.programAction = InputOutputTest;
518       break;
519     case clang::driver::options::OPT_E:
520       opts.programAction = PrintPreprocessedInput;
521       break;
522     case clang::driver::options::OPT_fsyntax_only:
523       opts.programAction = ParseSyntaxOnly;
524       break;
525     case clang::driver::options::OPT_emit_fir:
526       opts.programAction = EmitFIR;
527       break;
528     case clang::driver::options::OPT_emit_hlfir:
529       opts.programAction = EmitHLFIR;
530       break;
531     case clang::driver::options::OPT_emit_llvm:
532       opts.programAction = EmitLLVM;
533       break;
534     case clang::driver::options::OPT_emit_llvm_bc:
535       opts.programAction = EmitLLVMBitcode;
536       break;
537     case clang::driver::options::OPT_emit_obj:
538       opts.programAction = EmitObj;
539       break;
540     case clang::driver::options::OPT_S:
541       opts.programAction = EmitAssembly;
542       break;
543     case clang::driver::options::OPT_fdebug_unparse:
544       opts.programAction = DebugUnparse;
545       break;
546     case clang::driver::options::OPT_fdebug_unparse_no_sema:
547       opts.programAction = DebugUnparseNoSema;
548       break;
549     case clang::driver::options::OPT_fdebug_unparse_with_symbols:
550       opts.programAction = DebugUnparseWithSymbols;
551       break;
552     case clang::driver::options::OPT_fdebug_unparse_with_modules:
553       opts.programAction = DebugUnparseWithModules;
554       break;
555     case clang::driver::options::OPT_fdebug_dump_symbols:
556       opts.programAction = DebugDumpSymbols;
557       break;
558     case clang::driver::options::OPT_fdebug_dump_parse_tree:
559       opts.programAction = DebugDumpParseTree;
560       break;
561     case clang::driver::options::OPT_fdebug_dump_pft:
562       opts.programAction = DebugDumpPFT;
563       break;
564     case clang::driver::options::OPT_fdebug_dump_all:
565       opts.programAction = DebugDumpAll;
566       break;
567     case clang::driver::options::OPT_fdebug_dump_parse_tree_no_sema:
568       opts.programAction = DebugDumpParseTreeNoSema;
569       break;
570     case clang::driver::options::OPT_fdebug_dump_provenance:
571       opts.programAction = DebugDumpProvenance;
572       break;
573     case clang::driver::options::OPT_fdebug_dump_parsing_log:
574       opts.programAction = DebugDumpParsingLog;
575       break;
576     case clang::driver::options::OPT_fdebug_measure_parse_tree:
577       opts.programAction = DebugMeasureParseTree;
578       break;
579     case clang::driver::options::OPT_fdebug_pre_fir_tree:
580       opts.programAction = DebugPreFIRTree;
581       break;
582     case clang::driver::options::OPT_fget_symbols_sources:
583       opts.programAction = GetSymbolsSources;
584       break;
585     case clang::driver::options::OPT_fget_definition:
586       opts.programAction = GetDefinition;
587       break;
588     case clang::driver::options::OPT_init_only:
589       opts.programAction = InitOnly;
590       break;
591 
592       // TODO:
593       // case clang::driver::options::OPT_emit_llvm:
594       // case clang::driver::options::OPT_emit_llvm_only:
595       // case clang::driver::options::OPT_emit_codegen_only:
596       // case clang::driver::options::OPT_emit_module:
597       // (...)
598     }
599 
600     // Parse the values provided with `-fget-definition` (there should be 3
601     // integers)
602     if (llvm::opt::OptSpecifier(a->getOption().getID()) ==
603         clang::driver::options::OPT_fget_definition) {
604       unsigned optVals[3] = {0, 0, 0};
605 
606       for (unsigned i = 0; i < 3; i++) {
607         llvm::StringRef val = a->getValue(i);
608 
609         if (val.getAsInteger(10, optVals[i])) {
610           // A non-integer was encountered - that's an error.
611           diags.Report(clang::diag::err_drv_invalid_value)
612               << a->getOption().getName() << val;
613           break;
614         }
615       }
616       opts.getDefVals.line = optVals[0];
617       opts.getDefVals.startColumn = optVals[1];
618       opts.getDefVals.endColumn = optVals[2];
619     }
620   }
621 
622   // Parsing -load <dsopath> option and storing shared object path
623   if (llvm::opt::Arg *a = args.getLastArg(clang::driver::options::OPT_load)) {
624     opts.plugins.push_back(a->getValue());
625   }
626 
627   // Parsing -plugin <name> option and storing plugin name and setting action
628   if (const llvm::opt::Arg *a =
629           args.getLastArg(clang::driver::options::OPT_plugin)) {
630     opts.programAction = PluginAction;
631     opts.actionName = a->getValue();
632   }
633 
634   opts.outputFile = args.getLastArgValue(clang::driver::options::OPT_o);
635   opts.showHelp = args.hasArg(clang::driver::options::OPT_help);
636   opts.showVersion = args.hasArg(clang::driver::options::OPT_version);
637 
638   // Get the input kind (from the value passed via `-x`)
639   InputKind dashX(Language::Unknown);
640   if (const llvm::opt::Arg *a =
641           args.getLastArg(clang::driver::options::OPT_x)) {
642     llvm::StringRef xValue = a->getValue();
643     // Principal languages.
644     dashX = llvm::StringSwitch<InputKind>(xValue)
645                 // Flang does not differentiate between pre-processed and not
646                 // pre-processed inputs.
647                 .Case("f95", Language::Fortran)
648                 .Case("f95-cpp-input", Language::Fortran)
649                 // CUDA Fortran
650                 .Case("cuda", Language::Fortran)
651                 .Default(Language::Unknown);
652 
653     // Flang's intermediate representations.
654     if (dashX.isUnknown())
655       dashX = llvm::StringSwitch<InputKind>(xValue)
656                   .Case("ir", Language::LLVM_IR)
657                   .Case("fir", Language::MLIR)
658                   .Case("mlir", Language::MLIR)
659                   .Default(Language::Unknown);
660 
661     if (dashX.isUnknown())
662       diags.Report(clang::diag::err_drv_invalid_value)
663           << a->getAsString(args) << a->getValue();
664   }
665 
666   // Collect the input files and save them in our instance of FrontendOptions.
667   std::vector<std::string> inputs =
668       args.getAllArgValues(clang::driver::options::OPT_INPUT);
669   opts.inputs.clear();
670   if (inputs.empty())
671     // '-' is the default input if none is given.
672     inputs.push_back("-");
673   for (unsigned i = 0, e = inputs.size(); i != e; ++i) {
674     InputKind ik = dashX;
675     if (ik.isUnknown()) {
676       ik = FrontendOptions::getInputKindForExtension(
677           llvm::StringRef(inputs[i]).rsplit('.').second);
678       if (ik.isUnknown())
679         ik = Language::Unknown;
680       if (i == 0)
681         dashX = ik;
682     }
683 
684     opts.inputs.emplace_back(std::move(inputs[i]), ik);
685   }
686 
687   // Set fortranForm based on options -ffree-form and -ffixed-form.
688   if (const auto *arg =
689           args.getLastArg(clang::driver::options::OPT_ffixed_form,
690                           clang::driver::options::OPT_ffree_form)) {
691     opts.fortranForm =
692         arg->getOption().matches(clang::driver::options::OPT_ffixed_form)
693             ? FortranForm::FixedForm
694             : FortranForm::FreeForm;
695   }
696 
697   // Set fixedFormColumns based on -ffixed-line-length=<value>
698   if (const auto *arg =
699           args.getLastArg(clang::driver::options::OPT_ffixed_line_length_EQ)) {
700     llvm::StringRef argValue = llvm::StringRef(arg->getValue());
701     std::int64_t columns = -1;
702     if (argValue == "none") {
703       columns = 0;
704     } else if (argValue.getAsInteger(/*Radix=*/10, columns)) {
705       columns = -1;
706     }
707     if (columns < 0) {
708       diags.Report(clang::diag::err_drv_negative_columns)
709           << arg->getOption().getName() << arg->getValue();
710     } else if (columns == 0) {
711       opts.fixedFormColumns = 1000000;
712     } else if (columns < 7) {
713       diags.Report(clang::diag::err_drv_small_columns)
714           << arg->getOption().getName() << arg->getValue() << "7";
715     } else {
716       opts.fixedFormColumns = columns;
717     }
718   }
719 
720   // Set conversion based on -fconvert=<value>
721   if (const auto *arg =
722           args.getLastArg(clang::driver::options::OPT_fconvert_EQ)) {
723     const char *argValue = arg->getValue();
724     if (auto convert = parseConvertArg(argValue))
725       opts.envDefaults.push_back({"FORT_CONVERT", *convert});
726     else
727       diags.Report(clang::diag::err_drv_invalid_value)
728           << arg->getAsString(args) << argValue;
729   }
730 
731   // -f{no-}implicit-none
732   opts.features.Enable(
733       Fortran::common::LanguageFeature::ImplicitNoneTypeAlways,
734       args.hasFlag(clang::driver::options::OPT_fimplicit_none,
735                    clang::driver::options::OPT_fno_implicit_none, false));
736 
737   // -f{no-}backslash
738   opts.features.Enable(Fortran::common::LanguageFeature::BackslashEscapes,
739                        args.hasFlag(clang::driver::options::OPT_fbackslash,
740                                     clang::driver::options::OPT_fno_backslash,
741                                     false));
742 
743   // -f{no-}logical-abbreviations
744   opts.features.Enable(
745       Fortran::common::LanguageFeature::LogicalAbbreviations,
746       args.hasFlag(clang::driver::options::OPT_flogical_abbreviations,
747                    clang::driver::options::OPT_fno_logical_abbreviations,
748                    false));
749 
750   // -f{no-}xor-operator
751   opts.features.Enable(
752       Fortran::common::LanguageFeature::XOROperator,
753       args.hasFlag(clang::driver::options::OPT_fxor_operator,
754                    clang::driver::options::OPT_fno_xor_operator, false));
755 
756   // -fno-automatic
757   if (args.hasArg(clang::driver::options::OPT_fno_automatic)) {
758     opts.features.Enable(Fortran::common::LanguageFeature::DefaultSave);
759   }
760 
761   if (args.hasArg(
762           clang::driver::options::OPT_falternative_parameter_statement)) {
763     opts.features.Enable(Fortran::common::LanguageFeature::OldStyleParameter);
764   }
765   if (const llvm::opt::Arg *arg =
766           args.getLastArg(clang::driver::options::OPT_finput_charset_EQ)) {
767     llvm::StringRef argValue = arg->getValue();
768     if (argValue == "utf-8") {
769       opts.encoding = Fortran::parser::Encoding::UTF_8;
770     } else if (argValue == "latin-1") {
771       opts.encoding = Fortran::parser::Encoding::LATIN_1;
772     } else {
773       diags.Report(clang::diag::err_drv_invalid_value)
774           << arg->getAsString(args) << argValue;
775     }
776   }
777 
778   setUpFrontendBasedOnAction(opts);
779   opts.dashX = dashX;
780 
781   return diags.getNumErrors() == numErrorsBefore;
782 }
783 
784 // Generate the path to look for intrinsic modules
785 static std::string getIntrinsicDir(const char *argv) {
786   // TODO: Find a system independent API
787   llvm::SmallString<128> driverPath;
788   driverPath.assign(llvm::sys::fs::getMainExecutable(argv, nullptr));
789   llvm::sys::path::remove_filename(driverPath);
790   driverPath.append("/../include/flang/");
791   return std::string(driverPath);
792 }
793 
794 // Generate the path to look for OpenMP headers
795 static std::string getOpenMPHeadersDir(const char *argv) {
796   llvm::SmallString<128> includePath;
797   includePath.assign(llvm::sys::fs::getMainExecutable(argv, nullptr));
798   llvm::sys::path::remove_filename(includePath);
799   includePath.append("/../include/flang/OpenMP/");
800   return std::string(includePath);
801 }
802 
803 /// Parses all preprocessor input arguments and populates the preprocessor
804 /// options accordingly.
805 ///
806 /// \param [in] opts The preprocessor options instance
807 /// \param [out] args The list of input arguments
808 static void parsePreprocessorArgs(Fortran::frontend::PreprocessorOptions &opts,
809                                   llvm::opt::ArgList &args) {
810   // Add macros from the command line.
811   for (const auto *currentArg : args.filtered(clang::driver::options::OPT_D,
812                                               clang::driver::options::OPT_U)) {
813     if (currentArg->getOption().matches(clang::driver::options::OPT_D)) {
814       opts.addMacroDef(currentArg->getValue());
815     } else {
816       opts.addMacroUndef(currentArg->getValue());
817     }
818   }
819 
820   // Add the ordered list of -I's.
821   for (const auto *currentArg : args.filtered(clang::driver::options::OPT_I))
822     opts.searchDirectoriesFromDashI.emplace_back(currentArg->getValue());
823 
824   // Prepend the ordered list of -intrinsic-modules-path
825   // to the default location to search.
826   for (const auto *currentArg :
827        args.filtered(clang::driver::options::OPT_fintrinsic_modules_path))
828     opts.searchDirectoriesFromIntrModPath.emplace_back(currentArg->getValue());
829 
830   // -cpp/-nocpp
831   if (const auto *currentArg = args.getLastArg(
832           clang::driver::options::OPT_cpp, clang::driver::options::OPT_nocpp))
833     opts.macrosFlag =
834         (currentArg->getOption().matches(clang::driver::options::OPT_cpp))
835             ? PPMacrosFlag::Include
836             : PPMacrosFlag::Exclude;
837 
838   opts.noReformat = args.hasArg(clang::driver::options::OPT_fno_reformat);
839   opts.preprocessIncludeLines =
840       args.hasArg(clang::driver::options::OPT_fpreprocess_include_lines);
841   opts.noLineDirectives = args.hasArg(clang::driver::options::OPT_P);
842   opts.showMacros = args.hasArg(clang::driver::options::OPT_dM);
843 }
844 
845 /// Parses all semantic related arguments and populates the variables
846 /// options accordingly. Returns false if new errors are generated.
847 static bool parseSemaArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
848                           clang::DiagnosticsEngine &diags) {
849   unsigned numErrorsBefore = diags.getNumErrors();
850 
851   // -J/module-dir option
852   std::vector<std::string> moduleDirList =
853       args.getAllArgValues(clang::driver::options::OPT_module_dir);
854   // User can only specify one -J/-module-dir directory, but may repeat
855   // -J/-module-dir as long as the directory is the same each time.
856   // https://gcc.gnu.org/onlinedocs/gfortran/Directory-Options.html
857   std::sort(moduleDirList.begin(), moduleDirList.end());
858   moduleDirList.erase(std::unique(moduleDirList.begin(), moduleDirList.end()),
859                       moduleDirList.end());
860   if (moduleDirList.size() > 1) {
861     const unsigned diagID =
862         diags.getCustomDiagID(clang::DiagnosticsEngine::Error,
863                               "Only one '-module-dir/-J' directory allowed. "
864                               "'-module-dir/-J' may be given multiple times "
865                               "but the directory must be the same each time.");
866     diags.Report(diagID);
867   }
868   if (moduleDirList.size() == 1)
869     res.setModuleDir(moduleDirList[0]);
870 
871   // -fdebug-module-writer option
872   if (args.hasArg(clang::driver::options::OPT_fdebug_module_writer)) {
873     res.setDebugModuleDir(true);
874   }
875 
876   // -fhermetic-module-files option
877   if (args.hasArg(clang::driver::options::OPT_fhermetic_module_files)) {
878     res.setHermeticModuleFileOutput(true);
879   }
880 
881   // -module-suffix
882   if (const auto *moduleSuffix =
883           args.getLastArg(clang::driver::options::OPT_module_suffix)) {
884     res.setModuleFileSuffix(moduleSuffix->getValue());
885   }
886 
887   // -f{no-}analyzed-objects-for-unparse
888   res.setUseAnalyzedObjectsForUnparse(args.hasFlag(
889       clang::driver::options::OPT_fanalyzed_objects_for_unparse,
890       clang::driver::options::OPT_fno_analyzed_objects_for_unparse, true));
891 
892   return diags.getNumErrors() == numErrorsBefore;
893 }
894 
895 /// Parses all diagnostics related arguments and populates the variables
896 /// options accordingly. Returns false if new errors are generated.
897 static bool parseDiagArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
898                           clang::DiagnosticsEngine &diags) {
899   unsigned numErrorsBefore = diags.getNumErrors();
900 
901   // -Werror option
902   // TODO: Currently throws a Diagnostic for anything other than -W<error>,
903   // this has to change when other -W<opt>'s are supported.
904   if (args.hasArg(clang::driver::options::OPT_W_Joined)) {
905     const auto &wArgs =
906         args.getAllArgValues(clang::driver::options::OPT_W_Joined);
907     for (const auto &wArg : wArgs) {
908       if (wArg == "error") {
909         res.setWarnAsErr(true);
910       } else {
911         const unsigned diagID =
912             diags.getCustomDiagID(clang::DiagnosticsEngine::Error,
913                                   "Only `-Werror` is supported currently.");
914         diags.Report(diagID);
915       }
916     }
917   }
918 
919   // Default to off for `flang -fc1`.
920   res.getFrontendOpts().showColors =
921       parseShowColorsArgs(args, /*defaultDiagColor=*/false);
922 
923   // Honor color diagnostics.
924   res.getDiagnosticOpts().ShowColors = res.getFrontendOpts().showColors;
925 
926   return diags.getNumErrors() == numErrorsBefore;
927 }
928 
929 /// Parses all Dialect related arguments and populates the variables
930 /// options accordingly. Returns false if new errors are generated.
931 static bool parseDialectArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
932                              clang::DiagnosticsEngine &diags) {
933   unsigned numErrorsBefore = diags.getNumErrors();
934 
935   // -fdefault* family
936   if (args.hasArg(clang::driver::options::OPT_fdefault_real_8)) {
937     res.getDefaultKinds().set_defaultRealKind(8);
938     res.getDefaultKinds().set_doublePrecisionKind(16);
939   }
940   if (args.hasArg(clang::driver::options::OPT_fdefault_integer_8)) {
941     res.getDefaultKinds().set_defaultIntegerKind(8);
942     res.getDefaultKinds().set_subscriptIntegerKind(8);
943     res.getDefaultKinds().set_sizeIntegerKind(8);
944     res.getDefaultKinds().set_defaultLogicalKind(8);
945   }
946   if (args.hasArg(clang::driver::options::OPT_fdefault_double_8)) {
947     if (!args.hasArg(clang::driver::options::OPT_fdefault_real_8)) {
948       // -fdefault-double-8 has to be used with -fdefault-real-8
949       // to be compatible with gfortran
950       const unsigned diagID = diags.getCustomDiagID(
951           clang::DiagnosticsEngine::Error,
952           "Use of `-fdefault-double-8` requires `-fdefault-real-8`");
953       diags.Report(diagID);
954     }
955     // https://gcc.gnu.org/onlinedocs/gfortran/Fortran-Dialect-Options.html
956     res.getDefaultKinds().set_doublePrecisionKind(8);
957   }
958   if (args.hasArg(clang::driver::options::OPT_flarge_sizes))
959     res.getDefaultKinds().set_sizeIntegerKind(8);
960 
961   // -x cuda
962   auto language = args.getLastArgValue(clang::driver::options::OPT_x);
963   if (language == "cuda") {
964     res.getFrontendOpts().features.Enable(
965         Fortran::common::LanguageFeature::CUDA);
966   }
967 
968   // -fopenacc
969   if (args.hasArg(clang::driver::options::OPT_fopenacc)) {
970     res.getFrontendOpts().features.Enable(
971         Fortran::common::LanguageFeature::OpenACC);
972   }
973 
974   // -pedantic
975   if (args.hasArg(clang::driver::options::OPT_pedantic)) {
976     res.setEnableConformanceChecks();
977     res.setEnableUsageChecks();
978   }
979 
980   // -w
981   if (args.hasArg(clang::driver::options::OPT_w))
982     res.setDisableWarnings();
983 
984   // -std=f2018
985   // TODO: Set proper options when more fortran standards
986   // are supported.
987   if (args.hasArg(clang::driver::options::OPT_std_EQ)) {
988     auto standard = args.getLastArgValue(clang::driver::options::OPT_std_EQ);
989     // We only allow f2018 as the given standard
990     if (standard == "f2018") {
991       res.setEnableConformanceChecks();
992     } else {
993       const unsigned diagID =
994           diags.getCustomDiagID(clang::DiagnosticsEngine::Error,
995                                 "Only -std=f2018 is allowed currently.");
996       diags.Report(diagID);
997     }
998   }
999   return diags.getNumErrors() == numErrorsBefore;
1000 }
1001 
1002 /// Parses all OpenMP related arguments if the -fopenmp option is present,
1003 /// populating the \c res object accordingly. Returns false if new errors are
1004 /// generated.
1005 static bool parseOpenMPArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
1006                             clang::DiagnosticsEngine &diags) {
1007   llvm::opt::Arg *arg = args.getLastArg(clang::driver::options::OPT_fopenmp,
1008                                         clang::driver::options::OPT_fno_openmp);
1009   if (!arg || arg->getOption().matches(clang::driver::options::OPT_fno_openmp))
1010     return true;
1011 
1012   unsigned numErrorsBefore = diags.getNumErrors();
1013   llvm::Triple t(res.getTargetOpts().triple);
1014 
1015   // By default OpenMP is set to 1.1 version
1016   res.getLangOpts().OpenMPVersion = 11;
1017   res.getFrontendOpts().features.Enable(
1018       Fortran::common::LanguageFeature::OpenMP);
1019   if (int Version = getLastArgIntValue(
1020           args, clang::driver::options::OPT_fopenmp_version_EQ,
1021           res.getLangOpts().OpenMPVersion, diags)) {
1022     res.getLangOpts().OpenMPVersion = Version;
1023   }
1024   if (args.hasArg(clang::driver::options::OPT_fopenmp_force_usm)) {
1025     res.getLangOpts().OpenMPForceUSM = 1;
1026   }
1027   if (args.hasArg(clang::driver::options::OPT_fopenmp_is_target_device)) {
1028     res.getLangOpts().OpenMPIsTargetDevice = 1;
1029 
1030     // Get OpenMP host file path if any and report if a non existent file is
1031     // found
1032     if (auto *arg = args.getLastArg(
1033             clang::driver::options::OPT_fopenmp_host_ir_file_path)) {
1034       res.getLangOpts().OMPHostIRFile = arg->getValue();
1035       if (!llvm::sys::fs::exists(res.getLangOpts().OMPHostIRFile))
1036         diags.Report(clang::diag::err_drv_omp_host_ir_file_not_found)
1037             << res.getLangOpts().OMPHostIRFile;
1038     }
1039 
1040     if (args.hasFlag(
1041             clang::driver::options::OPT_fopenmp_assume_teams_oversubscription,
1042             clang::driver::options::
1043                 OPT_fno_openmp_assume_teams_oversubscription,
1044             /*Default=*/false))
1045       res.getLangOpts().OpenMPTeamSubscription = true;
1046 
1047     if (args.hasArg(clang::driver::options::OPT_fopenmp_assume_no_thread_state))
1048       res.getLangOpts().OpenMPNoThreadState = 1;
1049 
1050     if (args.hasArg(
1051             clang::driver::options::OPT_fopenmp_assume_no_nested_parallelism))
1052       res.getLangOpts().OpenMPNoNestedParallelism = 1;
1053 
1054     if (args.hasFlag(
1055             clang::driver::options::OPT_fopenmp_assume_threads_oversubscription,
1056             clang::driver::options::
1057                 OPT_fno_openmp_assume_threads_oversubscription,
1058             /*Default=*/false))
1059       res.getLangOpts().OpenMPThreadSubscription = true;
1060 
1061     if ((args.hasArg(clang::driver::options::OPT_fopenmp_target_debug) ||
1062          args.hasArg(clang::driver::options::OPT_fopenmp_target_debug_EQ))) {
1063       res.getLangOpts().OpenMPTargetDebug = getLastArgIntValue(
1064           args, clang::driver::options::OPT_fopenmp_target_debug_EQ,
1065           res.getLangOpts().OpenMPTargetDebug, diags);
1066 
1067       if (!res.getLangOpts().OpenMPTargetDebug &&
1068           args.hasArg(clang::driver::options::OPT_fopenmp_target_debug))
1069         res.getLangOpts().OpenMPTargetDebug = 1;
1070     }
1071     if (args.hasArg(clang::driver::options::OPT_nogpulib))
1072       res.getLangOpts().NoGPULib = 1;
1073   }
1074 
1075   switch (llvm::Triple(res.getTargetOpts().triple).getArch()) {
1076   case llvm::Triple::nvptx:
1077   case llvm::Triple::nvptx64:
1078   case llvm::Triple::amdgcn:
1079     if (!res.getLangOpts().OpenMPIsTargetDevice) {
1080       const unsigned diagID = diags.getCustomDiagID(
1081           clang::DiagnosticsEngine::Error,
1082           "OpenMP AMDGPU/NVPTX is only prepared to deal with device code.");
1083       diags.Report(diagID);
1084     }
1085     res.getLangOpts().OpenMPIsGPU = 1;
1086     break;
1087   default:
1088     res.getLangOpts().OpenMPIsGPU = 0;
1089     break;
1090   }
1091 
1092   // Get the OpenMP target triples if any.
1093   if (auto *arg =
1094           args.getLastArg(clang::driver::options::OPT_fopenmp_targets_EQ)) {
1095     enum ArchPtrSize { Arch16Bit, Arch32Bit, Arch64Bit };
1096     auto getArchPtrSize = [](const llvm::Triple &triple) {
1097       if (triple.isArch16Bit())
1098         return Arch16Bit;
1099       if (triple.isArch32Bit())
1100         return Arch32Bit;
1101       assert(triple.isArch64Bit() && "Expected 64-bit architecture");
1102       return Arch64Bit;
1103     };
1104 
1105     for (unsigned i = 0; i < arg->getNumValues(); ++i) {
1106       llvm::Triple tt(arg->getValue(i));
1107 
1108       if (tt.getArch() == llvm::Triple::UnknownArch ||
1109           !(tt.getArch() == llvm::Triple::aarch64 || tt.isPPC() ||
1110             tt.getArch() == llvm::Triple::systemz ||
1111             tt.getArch() == llvm::Triple::nvptx ||
1112             tt.getArch() == llvm::Triple::nvptx64 ||
1113             tt.getArch() == llvm::Triple::amdgcn ||
1114             tt.getArch() == llvm::Triple::x86 ||
1115             tt.getArch() == llvm::Triple::x86_64))
1116         diags.Report(clang::diag::err_drv_invalid_omp_target)
1117             << arg->getValue(i);
1118       else if (getArchPtrSize(t) != getArchPtrSize(tt))
1119         diags.Report(clang::diag::err_drv_incompatible_omp_arch)
1120             << arg->getValue(i) << t.str();
1121       else
1122         res.getLangOpts().OMPTargetTriples.push_back(tt);
1123     }
1124   }
1125   return diags.getNumErrors() == numErrorsBefore;
1126 }
1127 
1128 /// Parses signed integer overflow options and populates the
1129 /// CompilerInvocation accordingly.
1130 /// Returns false if new errors are generated.
1131 ///
1132 /// \param [out] invoc Stores the processed arguments
1133 /// \param [in] args The compiler invocation arguments to parse
1134 /// \param [out] diags DiagnosticsEngine to report erros with
1135 static bool parseIntegerOverflowArgs(CompilerInvocation &invoc,
1136                                      llvm::opt::ArgList &args,
1137                                      clang::DiagnosticsEngine &diags) {
1138   Fortran::common::LangOptions &opts = invoc.getLangOpts();
1139 
1140   if (args.getLastArg(clang::driver::options::OPT_fwrapv))
1141     opts.setSignedOverflowBehavior(Fortran::common::LangOptions::SOB_Defined);
1142 
1143   return true;
1144 }
1145 
1146 /// Parses all floating point related arguments and populates the
1147 /// CompilerInvocation accordingly.
1148 /// Returns false if new errors are generated.
1149 ///
1150 /// \param [out] invoc Stores the processed arguments
1151 /// \param [in] args The compiler invocation arguments to parse
1152 /// \param [out] diags DiagnosticsEngine to report erros with
1153 static bool parseFloatingPointArgs(CompilerInvocation &invoc,
1154                                    llvm::opt::ArgList &args,
1155                                    clang::DiagnosticsEngine &diags) {
1156   Fortran::common::LangOptions &opts = invoc.getLangOpts();
1157 
1158   if (const llvm::opt::Arg *a =
1159           args.getLastArg(clang::driver::options::OPT_ffp_contract)) {
1160     const llvm::StringRef val = a->getValue();
1161     enum Fortran::common::LangOptions::FPModeKind fpContractMode;
1162 
1163     if (val == "off")
1164       fpContractMode = Fortran::common::LangOptions::FPM_Off;
1165     else if (val == "fast")
1166       fpContractMode = Fortran::common::LangOptions::FPM_Fast;
1167     else {
1168       diags.Report(clang::diag::err_drv_unsupported_option_argument)
1169           << a->getSpelling() << val;
1170       return false;
1171     }
1172 
1173     opts.setFPContractMode(fpContractMode);
1174   }
1175 
1176   if (args.getLastArg(clang::driver::options::OPT_menable_no_infs)) {
1177     opts.NoHonorInfs = true;
1178   }
1179 
1180   if (args.getLastArg(clang::driver::options::OPT_menable_no_nans)) {
1181     opts.NoHonorNaNs = true;
1182   }
1183 
1184   if (args.getLastArg(clang::driver::options::OPT_fapprox_func)) {
1185     opts.ApproxFunc = true;
1186   }
1187 
1188   if (args.getLastArg(clang::driver::options::OPT_fno_signed_zeros)) {
1189     opts.NoSignedZeros = true;
1190   }
1191 
1192   if (args.getLastArg(clang::driver::options::OPT_mreassociate)) {
1193     opts.AssociativeMath = true;
1194   }
1195 
1196   if (args.getLastArg(clang::driver::options::OPT_freciprocal_math)) {
1197     opts.ReciprocalMath = true;
1198   }
1199 
1200   if (args.getLastArg(clang::driver::options::OPT_ffast_math)) {
1201     opts.NoHonorInfs = true;
1202     opts.NoHonorNaNs = true;
1203     opts.AssociativeMath = true;
1204     opts.ReciprocalMath = true;
1205     opts.ApproxFunc = true;
1206     opts.NoSignedZeros = true;
1207     opts.setFPContractMode(Fortran::common::LangOptions::FPM_Fast);
1208   }
1209 
1210   return true;
1211 }
1212 
1213 /// Parses vscale range options and populates the CompilerInvocation
1214 /// accordingly.
1215 /// Returns false if new errors are generated.
1216 ///
1217 /// \param [out] invoc Stores the processed arguments
1218 /// \param [in] args The compiler invocation arguments to parse
1219 /// \param [out] diags DiagnosticsEngine to report erros with
1220 static bool parseVScaleArgs(CompilerInvocation &invoc, llvm::opt::ArgList &args,
1221                             clang::DiagnosticsEngine &diags) {
1222   const auto *vscaleMin =
1223       args.getLastArg(clang::driver::options::OPT_mvscale_min_EQ);
1224   const auto *vscaleMax =
1225       args.getLastArg(clang::driver::options::OPT_mvscale_max_EQ);
1226 
1227   if (!vscaleMin && !vscaleMax)
1228     return true;
1229 
1230   llvm::Triple triple = llvm::Triple(invoc.getTargetOpts().triple);
1231   if (!triple.isAArch64() && !triple.isRISCV()) {
1232     const unsigned diagID =
1233         diags.getCustomDiagID(clang::DiagnosticsEngine::Error,
1234                               "`-mvscale-max` and `-mvscale-min` are not "
1235                               "supported for this architecture: %0");
1236     diags.Report(diagID) << triple.getArchName();
1237     return false;
1238   }
1239 
1240   Fortran::common::LangOptions &opts = invoc.getLangOpts();
1241   if (vscaleMin) {
1242     llvm::StringRef argValue = llvm::StringRef(vscaleMin->getValue());
1243     unsigned vscaleMinVal;
1244     if (argValue.getAsInteger(/*Radix=*/10, vscaleMinVal)) {
1245       diags.Report(clang::diag::err_drv_unsupported_option_argument)
1246           << vscaleMax->getSpelling() << argValue;
1247       return false;
1248     }
1249     opts.VScaleMin = vscaleMinVal;
1250   }
1251 
1252   if (vscaleMax) {
1253     llvm::StringRef argValue = llvm::StringRef(vscaleMax->getValue());
1254     unsigned vscaleMaxVal;
1255     if (argValue.getAsInteger(/*Radix=w*/ 10, vscaleMaxVal)) {
1256       diags.Report(clang::diag::err_drv_unsupported_option_argument)
1257           << vscaleMax->getSpelling() << argValue;
1258       return false;
1259     }
1260     opts.VScaleMax = vscaleMaxVal;
1261   }
1262   return true;
1263 }
1264 
1265 static bool parseLinkerOptionsArgs(CompilerInvocation &invoc,
1266                                    llvm::opt::ArgList &args,
1267                                    clang::DiagnosticsEngine &diags) {
1268   llvm::Triple triple = llvm::Triple(invoc.getTargetOpts().triple);
1269 
1270   // TODO: support --dependent-lib on other platforms when MLIR supports
1271   //       !llvm.dependent.lib
1272   if (args.hasArg(clang::driver::options::OPT_dependent_lib) &&
1273       !triple.isOSWindows()) {
1274     const unsigned diagID =
1275         diags.getCustomDiagID(clang::DiagnosticsEngine::Error,
1276                               "--dependent-lib is only supported on Windows");
1277     diags.Report(diagID);
1278     return false;
1279   }
1280 
1281   invoc.getCodeGenOpts().DependentLibs =
1282       args.getAllArgValues(clang::driver::options::OPT_dependent_lib);
1283   return true;
1284 }
1285 
1286 static bool parseLangOptionsArgs(CompilerInvocation &invoc,
1287                                  llvm::opt::ArgList &args,
1288                                  clang::DiagnosticsEngine &diags) {
1289   bool success = true;
1290 
1291   success &= parseIntegerOverflowArgs(invoc, args, diags);
1292   success &= parseFloatingPointArgs(invoc, args, diags);
1293   success &= parseVScaleArgs(invoc, args, diags);
1294 
1295   return success;
1296 }
1297 
1298 bool CompilerInvocation::createFromArgs(
1299     CompilerInvocation &invoc, llvm::ArrayRef<const char *> commandLineArgs,
1300     clang::DiagnosticsEngine &diags, const char *argv0) {
1301 
1302   bool success = true;
1303 
1304   // Set the default triple for this CompilerInvocation. This might be
1305   // overridden by users with `-triple` (see the call to `ParseTargetArgs`
1306   // below).
1307   // NOTE: Like in Clang, it would be nice to use option marshalling
1308   // for this so that the entire logic for setting-up the triple is in one
1309   // place.
1310   invoc.getTargetOpts().triple =
1311       llvm::Triple::normalize(llvm::sys::getDefaultTargetTriple());
1312 
1313   // Parse the arguments
1314   const llvm::opt::OptTable &opts = clang::driver::getDriverOptTable();
1315   llvm::opt::Visibility visibilityMask(clang::driver::options::FC1Option);
1316   unsigned missingArgIndex, missingArgCount;
1317   llvm::opt::InputArgList args = opts.ParseArgs(
1318       commandLineArgs, missingArgIndex, missingArgCount, visibilityMask);
1319 
1320   // Check for missing argument error.
1321   if (missingArgCount) {
1322     diags.Report(clang::diag::err_drv_missing_argument)
1323         << args.getArgString(missingArgIndex) << missingArgCount;
1324     success = false;
1325   }
1326 
1327   // Issue errors on unknown arguments
1328   for (const auto *a : args.filtered(clang::driver::options::OPT_UNKNOWN)) {
1329     auto argString = a->getAsString(args);
1330     std::string nearest;
1331     if (opts.findNearest(argString, nearest, visibilityMask) > 1)
1332       diags.Report(clang::diag::err_drv_unknown_argument) << argString;
1333     else
1334       diags.Report(clang::diag::err_drv_unknown_argument_with_suggestion)
1335           << argString << nearest;
1336     success = false;
1337   }
1338 
1339   // -flang-experimental-hlfir
1340   if (args.hasArg(clang::driver::options::OPT_flang_experimental_hlfir) ||
1341       args.hasArg(clang::driver::options::OPT_emit_hlfir)) {
1342     invoc.loweringOpts.setLowerToHighLevelFIR(true);
1343   }
1344 
1345   // -flang-deprecated-no-hlfir
1346   if (args.hasArg(clang::driver::options::OPT_flang_deprecated_no_hlfir) &&
1347       !args.hasArg(clang::driver::options::OPT_emit_hlfir)) {
1348     if (args.hasArg(clang::driver::options::OPT_flang_experimental_hlfir)) {
1349       const unsigned diagID = diags.getCustomDiagID(
1350           clang::DiagnosticsEngine::Error,
1351           "Options '-flang-experimental-hlfir' and "
1352           "'-flang-deprecated-no-hlfir' cannot be both specified");
1353       diags.Report(diagID);
1354     }
1355     invoc.loweringOpts.setLowerToHighLevelFIR(false);
1356   }
1357 
1358   // -fno-ppc-native-vector-element-order
1359   if (args.hasArg(clang::driver::options::OPT_fno_ppc_native_vec_elem_order)) {
1360     invoc.loweringOpts.setNoPPCNativeVecElemOrder(true);
1361   }
1362 
1363   // -flang-experimental-integer-overflow
1364   if (args.hasArg(
1365           clang::driver::options::OPT_flang_experimental_integer_overflow)) {
1366     invoc.loweringOpts.setNSWOnLoopVarInc(true);
1367   }
1368 
1369   // Preserve all the remark options requested, i.e. -Rpass, -Rpass-missed or
1370   // -Rpass-analysis. This will be used later when processing and outputting the
1371   // remarks generated by LLVM in ExecuteCompilerInvocation.cpp.
1372   for (auto *a : args.filtered(clang::driver::options::OPT_R_Group)) {
1373     if (a->getOption().matches(clang::driver::options::OPT_R_value_Group))
1374       // This is -Rfoo=, where foo is the name of the diagnostic
1375       // group. Add only the remark option name to the diagnostics. e.g. for
1376       // -Rpass= we will add the string "pass".
1377       invoc.getDiagnosticOpts().Remarks.push_back(
1378           std::string(a->getOption().getName().drop_front(1).rtrim("=-")));
1379     else
1380       // If no regex was provided, add the provided value, e.g. for -Rpass add
1381       // the string "pass".
1382       invoc.getDiagnosticOpts().Remarks.push_back(a->getValue());
1383   }
1384 
1385   success &= parseFrontendArgs(invoc.getFrontendOpts(), args, diags);
1386   parseTargetArgs(invoc.getTargetOpts(), args);
1387   parsePreprocessorArgs(invoc.getPreprocessorOpts(), args);
1388   parseCodeGenArgs(invoc.getCodeGenOpts(), args, diags);
1389   success &= parseDebugArgs(invoc.getCodeGenOpts(), args, diags);
1390   success &= parseVectorLibArg(invoc.getCodeGenOpts(), args, diags);
1391   success &= parseSemaArgs(invoc, args, diags);
1392   success &= parseDialectArgs(invoc, args, diags);
1393   success &= parseOpenMPArgs(invoc, args, diags);
1394   success &= parseDiagArgs(invoc, args, diags);
1395 
1396   // Collect LLVM (-mllvm) and MLIR (-mmlir) options.
1397   // NOTE: Try to avoid adding any options directly to `llvmArgs` or
1398   // `mlirArgs`. Instead, you can use
1399   //    * `-mllvm <your-llvm-option>`, or
1400   //    * `-mmlir <your-mlir-option>`.
1401   invoc.frontendOpts.llvmArgs =
1402       args.getAllArgValues(clang::driver::options::OPT_mllvm);
1403   invoc.frontendOpts.mlirArgs =
1404       args.getAllArgValues(clang::driver::options::OPT_mmlir);
1405 
1406   success &= parseLangOptionsArgs(invoc, args, diags);
1407 
1408   success &= parseLinkerOptionsArgs(invoc, args, diags);
1409 
1410   // Set the string to be used as the return value of the COMPILER_OPTIONS
1411   // intrinsic of iso_fortran_env. This is either passed in from the parent
1412   // compiler driver invocation with an environment variable, or failing that
1413   // set to the command line arguments of the frontend driver invocation.
1414   invoc.allCompilerInvocOpts = std::string();
1415   llvm::raw_string_ostream os(invoc.allCompilerInvocOpts);
1416   char *compilerOptsEnv = std::getenv("FLANG_COMPILER_OPTIONS_STRING");
1417   if (compilerOptsEnv != nullptr) {
1418     os << compilerOptsEnv;
1419   } else {
1420     os << argv0 << ' ';
1421     for (auto it = commandLineArgs.begin(), e = commandLineArgs.end(); it != e;
1422          ++it) {
1423       os << ' ' << *it;
1424     }
1425   }
1426 
1427   invoc.setArgv0(argv0);
1428 
1429   return success;
1430 }
1431 
1432 void CompilerInvocation::collectMacroDefinitions() {
1433   auto &ppOpts = this->getPreprocessorOpts();
1434 
1435   for (unsigned i = 0, n = ppOpts.macros.size(); i != n; ++i) {
1436     llvm::StringRef macro = ppOpts.macros[i].first;
1437     bool isUndef = ppOpts.macros[i].second;
1438 
1439     std::pair<llvm::StringRef, llvm::StringRef> macroPair = macro.split('=');
1440     llvm::StringRef macroName = macroPair.first;
1441     llvm::StringRef macroBody = macroPair.second;
1442 
1443     // For an #undef'd macro, we only care about the name.
1444     if (isUndef) {
1445       parserOpts.predefinitions.emplace_back(macroName.str(),
1446                                              std::optional<std::string>{});
1447       continue;
1448     }
1449 
1450     // For a #define'd macro, figure out the actual definition.
1451     if (macroName.size() == macro.size())
1452       macroBody = "1";
1453     else {
1454       // Note: GCC drops anything following an end-of-line character.
1455       llvm::StringRef::size_type end = macroBody.find_first_of("\n\r");
1456       macroBody = macroBody.substr(0, end);
1457     }
1458     parserOpts.predefinitions.emplace_back(
1459         macroName, std::optional<std::string>(macroBody.str()));
1460   }
1461 }
1462 
1463 void CompilerInvocation::setDefaultFortranOpts() {
1464   auto &fortranOptions = getFortranOpts();
1465 
1466   std::vector<std::string> searchDirectories{"."s};
1467   fortranOptions.searchDirectories = searchDirectories;
1468 
1469   // Add the location of omp_lib.h to the search directories. Currently this is
1470   // identical to the modules' directory.
1471   fortranOptions.searchDirectories.emplace_back(
1472       getOpenMPHeadersDir(getArgv0()));
1473 
1474   fortranOptions.isFixedForm = false;
1475 }
1476 
1477 // TODO: When expanding this method, consider creating a dedicated API for
1478 // this. Also at some point we will need to differentiate between different
1479 // targets and add dedicated predefines for each.
1480 void CompilerInvocation::setDefaultPredefinitions() {
1481   auto &fortranOptions = getFortranOpts();
1482   const auto &frontendOptions = getFrontendOpts();
1483   // Populate the macro list with version numbers and other predefinitions.
1484   fortranOptions.predefinitions.emplace_back("__flang__", "1");
1485   fortranOptions.predefinitions.emplace_back("__flang_major__",
1486                                              FLANG_VERSION_MAJOR_STRING);
1487   fortranOptions.predefinitions.emplace_back("__flang_minor__",
1488                                              FLANG_VERSION_MINOR_STRING);
1489   fortranOptions.predefinitions.emplace_back("__flang_patchlevel__",
1490                                              FLANG_VERSION_PATCHLEVEL_STRING);
1491 
1492   // Add predefinitions based on extensions enabled
1493   if (frontendOptions.features.IsEnabled(
1494           Fortran::common::LanguageFeature::OpenACC)) {
1495     fortranOptions.predefinitions.emplace_back("_OPENACC", "202211");
1496   }
1497   if (frontendOptions.features.IsEnabled(
1498           Fortran::common::LanguageFeature::OpenMP)) {
1499     Fortran::common::setOpenMPMacro(getLangOpts().OpenMPVersion,
1500                                     fortranOptions.predefinitions);
1501   }
1502 
1503   llvm::Triple targetTriple{llvm::Triple(this->targetOpts.triple)};
1504   if (targetTriple.isPPC()) {
1505     // '__powerpc__' is a generic macro for any PowerPC cases. e.g. Max integer
1506     // size.
1507     fortranOptions.predefinitions.emplace_back("__powerpc__", "1");
1508   }
1509   if (targetTriple.isOSLinux()) {
1510     fortranOptions.predefinitions.emplace_back("__linux__", "1");
1511   }
1512 
1513   switch (targetTriple.getArch()) {
1514   default:
1515     break;
1516   case llvm::Triple::ArchType::x86_64:
1517     fortranOptions.predefinitions.emplace_back("__x86_64__", "1");
1518     fortranOptions.predefinitions.emplace_back("__x86_64", "1");
1519     break;
1520   }
1521 }
1522 
1523 void CompilerInvocation::setFortranOpts() {
1524   auto &fortranOptions = getFortranOpts();
1525   const auto &frontendOptions = getFrontendOpts();
1526   const auto &preprocessorOptions = getPreprocessorOpts();
1527   auto &moduleDirJ = getModuleDir();
1528 
1529   if (frontendOptions.fortranForm != FortranForm::Unknown) {
1530     fortranOptions.isFixedForm =
1531         frontendOptions.fortranForm == FortranForm::FixedForm;
1532   }
1533   fortranOptions.fixedFormColumns = frontendOptions.fixedFormColumns;
1534 
1535   // -E
1536   fortranOptions.prescanAndReformat =
1537       frontendOptions.programAction == PrintPreprocessedInput;
1538 
1539   fortranOptions.features = frontendOptions.features;
1540   fortranOptions.encoding = frontendOptions.encoding;
1541 
1542   // Adding search directories specified by -I
1543   fortranOptions.searchDirectories.insert(
1544       fortranOptions.searchDirectories.end(),
1545       preprocessorOptions.searchDirectoriesFromDashI.begin(),
1546       preprocessorOptions.searchDirectoriesFromDashI.end());
1547 
1548   // Add the ordered list of -intrinsic-modules-path
1549   fortranOptions.searchDirectories.insert(
1550       fortranOptions.searchDirectories.end(),
1551       preprocessorOptions.searchDirectoriesFromIntrModPath.begin(),
1552       preprocessorOptions.searchDirectoriesFromIntrModPath.end());
1553 
1554   //  Add the default intrinsic module directory
1555   fortranOptions.intrinsicModuleDirectories.emplace_back(
1556       getIntrinsicDir(getArgv0()));
1557 
1558   // Add the directory supplied through -J/-module-dir to the list of search
1559   // directories
1560   if (moduleDirJ != ".")
1561     fortranOptions.searchDirectories.emplace_back(moduleDirJ);
1562 
1563   if (frontendOptions.instrumentedParse)
1564     fortranOptions.instrumentedParse = true;
1565 
1566   if (frontendOptions.showColors)
1567     fortranOptions.showColors = true;
1568 
1569   if (frontendOptions.needProvenanceRangeToCharBlockMappings)
1570     fortranOptions.needProvenanceRangeToCharBlockMappings = true;
1571 
1572   if (getEnableConformanceChecks())
1573     fortranOptions.features.WarnOnAllNonstandard();
1574 
1575   if (getEnableUsageChecks())
1576     fortranOptions.features.WarnOnAllUsage();
1577 
1578   if (getDisableWarnings()) {
1579     fortranOptions.features.DisableAllNonstandardWarnings();
1580     fortranOptions.features.DisableAllUsageWarnings();
1581   }
1582 }
1583 
1584 std::unique_ptr<Fortran::semantics::SemanticsContext>
1585 CompilerInvocation::getSemanticsCtx(
1586     Fortran::parser::AllCookedSources &allCookedSources,
1587     const llvm::TargetMachine &targetMachine) {
1588   auto &fortranOptions = getFortranOpts();
1589 
1590   auto semanticsContext = std::make_unique<semantics::SemanticsContext>(
1591       getDefaultKinds(), fortranOptions.features, getLangOpts(),
1592       allCookedSources);
1593 
1594   semanticsContext->set_moduleDirectory(getModuleDir())
1595       .set_searchDirectories(fortranOptions.searchDirectories)
1596       .set_intrinsicModuleDirectories(fortranOptions.intrinsicModuleDirectories)
1597       .set_warningsAreErrors(getWarnAsErr())
1598       .set_moduleFileSuffix(getModuleFileSuffix())
1599       .set_underscoring(getCodeGenOpts().Underscoring);
1600 
1601   std::string compilerVersion = Fortran::common::getFlangFullVersion();
1602   Fortran::tools::setUpTargetCharacteristics(
1603       semanticsContext->targetCharacteristics(), targetMachine, getTargetOpts(),
1604       compilerVersion, allCompilerInvocOpts);
1605   return semanticsContext;
1606 }
1607 
1608 /// Set \p loweringOptions controlling lowering behavior based
1609 /// on the \p optimizationLevel.
1610 void CompilerInvocation::setLoweringOptions() {
1611   const CodeGenOptions &codegenOpts = getCodeGenOpts();
1612 
1613   // Lower TRANSPOSE as a runtime call under -O0.
1614   loweringOpts.setOptimizeTranspose(codegenOpts.OptimizationLevel > 0);
1615   loweringOpts.setUnderscoring(codegenOpts.Underscoring);
1616 
1617   const Fortran::common::LangOptions &langOptions = getLangOpts();
1618   loweringOpts.setIntegerWrapAround(langOptions.getSignedOverflowBehavior() ==
1619                                     Fortran::common::LangOptions::SOB_Defined);
1620   Fortran::common::MathOptionsBase &mathOpts = loweringOpts.getMathOptions();
1621   // TODO: when LangOptions are finalized, we can represent
1622   //       the math related options using Fortran::commmon::MathOptionsBase,
1623   //       so that we can just copy it into LoweringOptions.
1624   mathOpts
1625       .setFPContractEnabled(langOptions.getFPContractMode() ==
1626                             Fortran::common::LangOptions::FPM_Fast)
1627       .setNoHonorInfs(langOptions.NoHonorInfs)
1628       .setNoHonorNaNs(langOptions.NoHonorNaNs)
1629       .setApproxFunc(langOptions.ApproxFunc)
1630       .setNoSignedZeros(langOptions.NoSignedZeros)
1631       .setAssociativeMath(langOptions.AssociativeMath)
1632       .setReciprocalMath(langOptions.ReciprocalMath);
1633 }
1634