Sketch some 'clang -cc1' support, for testing parts of CompilerInvocation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89333 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/tools/driver/driver.cpp b/tools/driver/driver.cpp
index 43dd36963c..dbfc293655 100644
--- a/tools/driver/driver.cpp
+++ b/tools/driver/driver.cpp
@@ -178,6 +178,9 @@ void ApplyQAOverride(std::vector<const char*> &Args, const char *OverrideStr,
   }
 }
 
+extern int cc1_main(Diagnostic &Diags,
+                    const char **ArgBegin, const char **ArgEnd);
+
 int main(int argc, const char **argv) {
   llvm::sys::PrintStackTraceOnErrorSignal();
   llvm::PrettyStackTraceProgram X(argc, argv);
@@ -187,6 +190,10 @@ int main(int argc, const char **argv) {
 
   Diagnostic Diags(&DiagClient);
 
+  // Dispatch to cc1_main if appropriate.
+  if (argc > 1 && llvm::StringRef(argv[1]) == "-cc1")
+    return cc1_main(Diags, argv+2, argv+argc);
+
 #ifdef CLANG_IS_PRODUCTION
   bool IsProduction = true;
 #else