Introduce command line option -error-on-deserialized-decl that is accompanied by a name

and emits an error if a declaration with this name is deserialized from PCH.

This is for testing, to make sure that we don't deserialize stuff needlessly.

llvm-svn: 116505

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 8f0cb089ee6..3a928a520da 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1409,7 +1409,13 @@ static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
   Opts.UsePredefines = !Args.hasArg(OPT_undef);
   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
+
   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
+  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
+         ie = Args.filtered_end(); it != ie; ++it) {
+    const Arg *A = *it;
+    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
+  }
 
   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
     llvm::StringRef Value(A->getValue(Args));