Reapply "Fix regression in behavior of clang -x c++-header -fmodule-name=XXX"
This reverts commit r345963. We have a path forward now.
Original commit message:
The driver accidentally stopped passing the input filenames on to -cc1
in this mode due to confusion over what action was being requested.
This change also fixes a couple of crashes I encountered when passing
multiple files to such a -cc1 invocation.
llvm-svn: 346130
diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index a9c51d4..719474d 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -372,6 +372,9 @@
void CompilerInstance::createPreprocessor(TranslationUnitKind TUKind) {
const PreprocessorOptions &PPOpts = getPreprocessorOpts();
+ // The module manager holds a reference to the old preprocessor (if any).
+ ModuleManager.reset();
+
// Create a PTH manager if we are using some form of a token cache.
PTHManager *PTHMgr = nullptr;
if (!PPOpts.TokenCache.empty())