1 files changed, 9 insertions, 9 deletions
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 2c6ba15..692e685 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -3526,6 +3526,9 @@ void CompilerInvocation::GenerateLangArgs(const LangOptions &Opts,
     GenerateArg(Args, OPT_fexperimental_relative_cxx_abi_vtables, SA);
   else
     GenerateArg(Args, OPT_fno_experimental_relative_cxx_abi_vtables, SA);
+
+  for (const auto &MP : Opts.MacroPrefixMap)
+    GenerateArg(Args, OPT_fmacro_prefix_map_EQ, MP.first + "=" + MP.second, SA);
 }
 
 bool CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
@@ -4036,6 +4039,12 @@ bool CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
                    options::OPT_fno_experimental_relative_cxx_abi_vtables,
                    TargetCXXABI::usesRelativeVTables(T));
 
+  for (const auto &A : Args.getAllArgValues(OPT_fmacro_prefix_map_EQ)) {
+    auto Split = StringRef(A).split('=');
+    Opts.MacroPrefixMap.insert(
+        {std::string(Split.first), std::string(Split.second)});
+  }
+
   return Diags.getNumErrors() == NumErrorsBefore;
 }
 
@@ -4108,9 +4117,6 @@ static void GeneratePreprocessorArgs(PreprocessorOptions &Opts,
   for (const auto &D : Opts.DeserializedPCHDeclsToErrorOn)
     GenerateArg(Args, OPT_error_on_deserialized_pch_decl, D, SA);
 
-  for (const auto &MP : Opts.MacroPrefixMap)
-    GenerateArg(Args, OPT_fmacro_prefix_map_EQ, MP.first + "=" + MP.second, SA);
-
   if (Opts.PrecompiledPreambleBytes != std::make_pair(0u, false))
     GenerateArg(Args, OPT_preamble_bytes_EQ,
                 Twine(Opts.PrecompiledPreambleBytes.first) + "," +
@@ -4179,12 +4185,6 @@ static bool ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
   for (const auto *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
 
-  for (const auto &A : Args.getAllArgValues(OPT_fmacro_prefix_map_EQ)) {
-    auto Split = StringRef(A).split('=');
-    Opts.MacroPrefixMap.insert(
-        {std::string(Split.first), std::string(Split.second)});
-  }
-
   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
     StringRef Value(A->getValue());
     size_t Comma = Value.find(',');