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

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

Reviewed By: Bigcheese

Differential Revision: https://reviews.llvm.org/D94674

Author: jansvoboda11

clang/include/clang/Frontend/CompilerInvocation.h

@@ -176,11 +176,12 @@ class CompilerInvocation : public CompilerInvocationBase {
   /// \param Opts - The LangOptions object to set up.
   /// \param IK - The input language.
   /// \param T - The target triple.
-  /// \param PPOpts - The PreprocessorOptions affected.
+  /// \param Includes - The affected list of included files.
   /// \param LangStd - The input language standard.
-  static void setLangDefaults(LangOptions &Opts, InputKind IK,
-                   const llvm::Triple &T, PreprocessorOptions &PPOpts,
-                   LangStandard::Kind LangStd = LangStandard::lang_unspecified);
+  static void
+  setLangDefaults(LangOptions &Opts, InputKind IK, const llvm::Triple &T,
+                  std::vector<std::string> &Includes,
+                  LangStandard::Kind LangStd = LangStandard::lang_unspecified);
 
   /// Retrieve a module hash string that is suitable for uniquely
   /// identifying the conditions under which the module was built.

clang/lib/Frontend/CompilerInvocation.cpp

@@ -1889,7 +1889,7 @@ static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
 
 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
                                          const llvm::Triple &T,
-                                         PreprocessorOptions &PPOpts,
+                                         std::vector<std::string> &Includes,
                                          LangStandard::Kind LangStd) {
   // Set some properties which depend solely on the input kind; it would be nice
   // to move these to the language standard, and have the driver resolve the
@@ -2000,9 +2000,9 @@ void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
     if (Opts.IncludeDefaultHeader) {
       if (Opts.DeclareOpenCLBuiltins) {
         // Only include base header file for builtin types and constants.
-        PPOpts.Includes.push_back("opencl-c-base.h");
+        Includes.push_back("opencl-c-base.h");
       } else {
-        PPOpts.Includes.push_back("opencl-c.h");
+        Includes.push_back("opencl-c.h");
       }
     }
   }
@@ -2138,8 +2138,8 @@ static const StringRef GetInputKindName(InputKind IK) {
 }
 
 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
-                          const TargetOptions &TargetOpts,
-                          PreprocessorOptions &PPOpts,
+                          const llvm::Triple &T,
+                          std::vector<std::string> &Includes,
                           DiagnosticsEngine &Diags) {
   // FIXME: Cleanup per-file based stuff.
   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
@@ -2212,8 +2212,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
 
   Opts.SYCLIsDevice = Opts.SYCL && Args.hasArg(options::OPT_fsycl_is_device);
 
-  llvm::Triple T(TargetOpts.Triple);
-  CompilerInvocation::setLangDefaults(Opts, IK, T, PPOpts, LangStd);
+  CompilerInvocation::setLangDefaults(Opts, IK, T, Includes, LangStd);
 
   // -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
   // This option should be deprecated for CL > 1.0 because
@@ -2490,7 +2489,6 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
       Diags.Report(diag::err_drv_argument_not_allowed_with)
           << A->getSpelling() << "-fdefault-calling-conv";
     else {
-      llvm::Triple T(TargetOpts.Triple);
       if (T.getArch() != llvm::Triple::x86)
         Diags.Report(diag::err_drv_argument_not_allowed_with)
             << A->getSpelling() << T.getTriple();
@@ -2527,8 +2525,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
       // Add unsupported host targets here:
       case llvm::Triple::nvptx:
       case llvm::Triple::nvptx64:
-        Diags.Report(diag::err_drv_omp_host_target_not_supported)
-            << TargetOpts.Triple;
+        Diags.Report(diag::err_drv_omp_host_target_not_supported) << T.str();
         break;
       }
     }
@@ -2960,8 +2957,8 @@ bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
   } else {
     // Other LangOpts are only initialized when the input is not AST or LLVM IR.
     // FIXME: Should we really be calling this for an Language::Asm input?
-    ParseLangArgs(LangOpts, Args, DashX, Res.getTargetOpts(),
-                  Res.getPreprocessorOpts(), Diags);
+    ParseLangArgs(LangOpts, Args, DashX, T, Res.getPreprocessorOpts().Includes,
+                  Diags);
     if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
       LangOpts.ObjCExceptions = 1;
     if (T.isOSDarwin() && DashX.isPreprocessed()) {