[clang] [clang][deps] Skip slow `UNHASHED_CONTROL_BLOCK` records (PR #69975)

[Jan Svoboda via cfe-commits]

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@@ -1212,52 +1212,54 @@ void ASTWriter::writeUnhashedControlBlock(Preprocessor &PP,
     Record.clear();
   }
 
+  const auto &HSOpts = PP.getHeaderSearchInfo().getHeaderSearchOpts();
+
   // Diagnostic options.
   const auto &Diags = Context.getDiagnostics();
   const DiagnosticOptions &DiagOpts = Diags.getDiagnosticOptions();
+  if (!HSOpts.ModulesSkipDiagnosticOptions) {
 #define DIAGOPT(Name, Bits, Default) Record.push_back(DiagOpts.Name);
 #define ENUM_DIAGOPT(Name, Type, Bits, Default)                                \
   Record.push_back(static_cast<unsigned>(DiagOpts.get##Name()));
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jansvoboda11 wrote:

`clang-format` unfortunately does not indent this line.

https://github.com/llvm/llvm-project/pull/69975