Revert "[clang][cli] Port OpenMP-related LangOpts to marshalling system"

This reverts commit 9ad94c1

It turns out that to correctly generate command line flags for LangOptions::OpenMP and LangOptions::OpenMPSimd, we need the flexibility of C++.

clang/include/clang/Driver/Options.td

@@ -2145,24 +2145,18 @@ def fopenmp_EQ : Joined<["-"], "fopenmp=">, Group<f_Group>;
 def fopenmp_use_tls : Flag<["-"], "fopenmp-use-tls">, Group<f_Group>,
   Flags<[NoArgumentUnused, HelpHidden]>;
 def fnoopenmp_use_tls : Flag<["-"], "fnoopenmp-use-tls">, Group<f_Group>,
-  Flags<[CC1Option, NoArgumentUnused, HelpHidden]>,
-  MarshallingInfoNegativeFlag<LangOpts<"OpenMPUseTLS">, !strconcat("(bool)", fopenmp.KeyPath)>,
-  ShouldParseIf<fopenmp.KeyPath>;
+  Flags<[CC1Option, NoArgumentUnused, HelpHidden]>;
 def fopenmp_targets_EQ : CommaJoined<["-"], "fopenmp-targets=">, Flags<[NoXarchOption, CC1Option]>,
   HelpText<"Specify comma-separated list of triples OpenMP offloading targets to be supported">;
 def fopenmp_relocatable_target : Flag<["-"], "fopenmp-relocatable-target">,
   Group<f_Group>, Flags<[CC1Option, NoArgumentUnused, HelpHidden]>;
 def fnoopenmp_relocatable_target : Flag<["-"], "fnoopenmp-relocatable-target">,
   Group<f_Group>, Flags<[CC1Option, NoArgumentUnused, HelpHidden]>;
-defm openmp_simd : BoolFOption<"openmp-simd",
-  LangOpts<"OpenMPSimd">, DefaultFalse,
-  PosFlag<SetTrue, [], "Emit OpenMP code only for SIMD-based constructs.">,
-  NegFlag<SetFalse>, BothFlags<[CC1Option, NoArgumentUnused]>>,
-  ShouldParseIf<!strconcat("!", fopenmp.KeyPath)>;
+def fopenmp_simd : Flag<["-"], "fopenmp-simd">, Group<f_Group>, Flags<[CC1Option, NoArgumentUnused]>,
+  HelpText<"Emit OpenMP code only for SIMD-based constructs.">;
 def fopenmp_enable_irbuilder : Flag<["-"], "fopenmp-enable-irbuilder">, Group<f_Group>, Flags<[CC1Option, NoArgumentUnused, HelpHidden]>,
-  HelpText<"Use the experimental OpenMP-IR-Builder codegen path.">,
-  MarshallingInfoFlag<LangOpts<"OpenMPIRBuilder">>,
-  ShouldParseIf<fopenmp.KeyPath>;
+  HelpText<"Use the experimental OpenMP-IR-Builder codegen path.">;
+def fno_openmp_simd : Flag<["-"], "fno-openmp-simd">, Group<f_Group>, Flags<[CC1Option, NoArgumentUnused]>;
 def fopenmp_cuda_mode : Flag<["-"], "fopenmp-cuda-mode">, Group<f_Group>,
   Flags<[CC1Option, NoArgumentUnused, HelpHidden]>;
 def fno_openmp_cuda_mode : Flag<["-"], "fno-openmp-cuda-mode">, Group<f_Group>,
@@ -5373,12 +5367,9 @@ def fno_cuda_host_device_constexpr : Flag<["-"], "fno-cuda-host-device-constexpr
 //===----------------------------------------------------------------------===//
 
 def fopenmp_is_device : Flag<["-"], "fopenmp-is-device">,
-  HelpText<"Generate code only for an OpenMP target device.">,
-  MarshallingInfoFlag<LangOpts<"OpenMPIsDevice">>,
-  ShouldParseIf<fopenmp.KeyPath>;
+  HelpText<"Generate code only for an OpenMP target device.">;
 def fopenmp_host_ir_file_path : Separate<["-"], "fopenmp-host-ir-file-path">,
-  HelpText<"Path to the IR file produced by the frontend for the host.">,
-  MarshallingInfoString<LangOpts<"OMPHostIRFile">>;
+  HelpText<"Path to the IR file produced by the frontend for the host.">;
 
 //===----------------------------------------------------------------------===//
 // SYCL Options

clang/lib/Frontend/CompilerInvocation.cpp

@@ -494,12 +494,6 @@ static void FixupInvocation(CompilerInvocation &Invocation,
           << A->getSpelling() << T.getTriple();
   }
 
-  // Report if OpenMP host file does not exist.
-  if (!LangOpts.OMPHostIRFile.empty() &&
-      !llvm::sys::fs::exists(LangOpts.OMPHostIRFile))
-    Diags.Report(diag::err_drv_omp_host_ir_file_not_found)
-        << LangOpts.OMPHostIRFile;
-
   if (!CodeGenOpts.ProfileRemappingFile.empty() && CodeGenOpts.LegacyPassManager)
     Diags.Report(diag::err_drv_argument_only_allowed_with)
         << Args.getLastArg(OPT_fprofile_remapping_file_EQ)->getAsString(Args)
@@ -2437,6 +2431,13 @@ void CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
   bool IsSimdSpecified =
       Args.hasFlag(options::OPT_fopenmp_simd, options::OPT_fno_openmp_simd,
                    /*Default=*/false);
+  Opts.OpenMPSimd = !Opts.OpenMP && IsSimdSpecified;
+  Opts.OpenMPUseTLS =
+      Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
+  Opts.OpenMPIsDevice =
+      Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
+  Opts.OpenMPIRBuilder =
+      Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_enable_irbuilder);
   bool IsTargetSpecified =
       Opts.OpenMPIsDevice || Args.hasArg(options::OPT_fopenmp_targets_EQ);
 
@@ -2510,6 +2511,15 @@ void CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
     }
   }
 
+  // Get OpenMP host file path if any and report if a non existent file is
+  // found
+  if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
+    Opts.OMPHostIRFile = A->getValue();
+    if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
+      Diags.Report(diag::err_drv_omp_host_ir_file_not_found)
+          << Opts.OMPHostIRFile;
+  }
+
   // Set CUDA mode for OpenMP target NVPTX/AMDGCN if specified in options
   Opts.OpenMPCUDAMode = Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN()) &&
                         Args.hasArg(options::OPT_fopenmp_cuda_mode);