[clang][cli] NFC: Decrease the scope of ParseCodeGenArgs parameters

[jansvoboda11]

Summary

Instead of passing the whole TargetOptions and FrontendOptions to ParseCodeGenArgs give it only the necessary members.
This makes tracking the dependencies between various parsers and option groups easier.

[Bigcheese]

LGTM.

clang/lib/Frontend/CompilerInvocation.cpp

static void FixupInvocation(CompilerInvocation &Invocation,
 
   LangOpts.ForceEmitVTables = CodeGenOpts.ForceEmitVTables;
   LangOpts.SpeculativeLoadHardening = CodeGenOpts.SpeculativeLoadHardening;
   LangOpts.CurrentModule = LangOpts.ModuleName;
 
   llvm::Triple T(TargetOpts.Triple);
   llvm::Triple::ArchType Arch = T.getArch();
 
+  CodeGenOpts.CodeModel = TargetOpts.CodeModel;
+
   if (LangOpts.getExceptionHandling() != llvm::ExceptionHandling::None &&
       T.isWindowsMSVCEnvironment())
     Diags.Report(diag::err_fe_invalid_exception_model)
         << static_cast<unsigned>(LangOpts.getExceptionHandling()) << T.str();
 
   if (LangOpts.AppleKext && !LangOpts.CPlusPlus)
     Diags.Report(diag::warn_c_kext);
 
if (PGOReader->hasCSIRLevelProfile())
       Opts.setProfileUse(CodeGenOptions::ProfileCSIRInstr);
     else
       Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
   } else
     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
 }
 
 static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
-                             DiagnosticsEngine &Diags,
-                             const TargetOptions &TargetOpts,
-                             const FrontendOptions &FrontendOpts) {
+                             DiagnosticsEngine &Diags, const llvm::Triple &T,
+                             const std::string &OutputFile) {
   bool Success = true;
-  llvm::Triple Triple = llvm::Triple(TargetOpts.Triple);
 
   unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
   // TODO: This could be done in Driver
   unsigned MaxOptLevel = 3;
   if (OptimizationLevel > MaxOptLevel) {
     // If the optimization level is not supported, fall back on the default
     // optimization
     Diags.Report(diag::warn_drv_optimization_value)
Opts.DebugPrefixMap.insert(
         {std::string(Split.first), std::string(Split.second)});
   }
 
   const llvm::Triple::ArchType DebugEntryValueArchs[] = {
       llvm::Triple::x86, llvm::Triple::x86_64, llvm::Triple::aarch64,
       llvm::Triple::arm, llvm::Triple::armeb, llvm::Triple::mips,
       llvm::Triple::mipsel, llvm::Triple::mips64, llvm::Triple::mips64el};
 
-  llvm::Triple T(TargetOpts.Triple);
   if (Opts.OptimizationLevel > 0 && Opts.hasReducedDebugInfo() &&
       llvm::is_contained(DebugEntryValueArchs, T.getArch()))
     Opts.EmitCallSiteInfo = true;
 
   Opts.NewStructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa) &&
                            Args.hasArg(OPT_new_struct_path_tbaa);
   Opts.OptimizeSize = getOptimizationLevelSize(Args);
   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
Opts.DebugNameTable = static_cast<unsigned>(
           ? llvm::DICompileUnit::DebugNameTableKind::GNU
           : Args.hasArg(OPT_gpubnames)
                 ? llvm::DICompileUnit::DebugNameTableKind::Default
                 : llvm::DICompileUnit::DebugNameTableKind::None);
 
   if (!Opts.ProfileInstrumentUsePath.empty())
     setPGOUseInstrumentor(Opts, Opts.ProfileInstrumentUsePath);
 
-  Opts.CodeModel = TargetOpts.CodeModel;
-
   if (const Arg *A = Args.getLastArg(OPT_ftime_report, OPT_ftime_report_EQ)) {
     Opts.TimePasses = true;
 
     // -ftime-report= is only for new pass manager.
     if (A->getOption().getID() == OPT_ftime_report_EQ) {
       if (Opts.LegacyPassManager)
         Diags.Report(diag::err_drv_argument_only_allowed_with)
             << A->getAsString(Args) << "-fno-legacy-pass-manager";
if (IK.getLanguage() != Language::LLVM_IR)
       Diags.Report(diag::err_drv_argument_only_allowed_with)
           << A->getAsString(Args) << "-x ir";
     Opts.ThinLTOIndexFile =
         std::string(Args.getLastArgValue(OPT_fthinlto_index_EQ));
   }
   if (Arg *A = Args.getLastArg(OPT_save_temps_EQ))
     Opts.SaveTempsFilePrefix =
         llvm::StringSwitch<std::string>(A->getValue())
-            .Case("obj", FrontendOpts.OutputFile)
-            .Default(llvm::sys::path::filename(FrontendOpts.OutputFile).str());
+            .Case("obj", OutputFile)
+            .Default(llvm::sys::path::filename(OutputFile).str());
 
   // The memory profile runtime appends the pid to make this name more unique.
   const char *MemProfileBasename = "memprof.profraw";
   if (Args.hasArg(OPT_fmemory_profile_EQ)) {
     SmallString<128> Path(
         std::string(Args.getLastArgValue(OPT_fmemory_profile_EQ)));
     llvm::sys::path::append(Path, MemProfileBasename);
     Opts.MemoryProfileOutput = std::string(Path);
bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
   }
   Success &= ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
                                  /*DefaultDiagColor=*/false);
   ParseCommentArgs(LangOpts.CommentOpts, Args);
   // FIXME: We shouldn't have to pass the DashX option around here
   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags,
                                       LangOpts.IsHeaderFile);
   ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
-  Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags,
-                              Res.getTargetOpts(), Res.getFrontendOpts());
+  llvm::Triple T(Res.getTargetOpts().Triple);
+  Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags, T,
+                              Res.getFrontendOpts().OutputFile);
   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args,
                         Res.getFileSystemOpts().WorkingDir);
-  llvm::Triple T(Res.getTargetOpts().Triple);
   if (DashX.getFormat() == InputKind::Precompiled ||
       DashX.getLanguage() == Language::LLVM_IR) {
     // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
     // PassManager in BackendUtil.cpp. They need to be initializd no matter
     // what the input type is.
     if (Args.hasArg(OPT_fobjc_arc))
       LangOpts.ObjCAutoRefCount = 1;
     // PIClevel and PIELevel are needed during code generation and this should be