[APINotes] Upstream APINotesOptions

This upstreams more of the Clang API Notes functionality that is
currently implemented in the Apple fork:
https://github.com/apple/llvm-project/tree/next/clang/lib/APINotes

This adds the first compiler options related to API Notes to the
upstream Clang: `-iapinotes-modules` and `-fapinotes-swift-version=`.
However, this does not add the `-fapinotes` flag that enables API Notes,
since the feature is not fully functional yet.

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index fd6c250..140feb0 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -3261,6 +3261,17 @@ static bool ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
   return Diags.getNumErrors() == NumErrorsBefore;
 }
 
+static void ParseAPINotesArgs(APINotesOptions &Opts, ArgList &Args,
+                              DiagnosticsEngine &diags) {
+  if (const Arg *A = Args.getLastArg(OPT_fapinotes_swift_version)) {
+    if (Opts.SwiftVersion.tryParse(A->getValue()))
+      diags.Report(diag::err_drv_invalid_value)
+          << A->getAsString(Args) << A->getValue();
+  }
+  for (const Arg *A : Args.filtered(OPT_iapinotes_modules))
+    Opts.ModuleSearchPaths.push_back(A->getValue());
+}
+
 /// Check if input file kind and language standard are compatible.
 static bool IsInputCompatibleWithStandard(InputKind IK,
                                           const LangStandard &S) {
@@ -4538,6 +4549,7 @@ bool CompilerInvocation::CreateFromArgsImpl(
   llvm::Triple T(Res.getTargetOpts().Triple);
   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args, Diags,
                         Res.getFileSystemOpts().WorkingDir);
+  ParseAPINotesArgs(Res.getAPINotesOpts(), Args, Diags);
 
   ParseLangArgs(LangOpts, Args, DashX, T, Res.getPreprocessorOpts().Includes,
                 Diags);