[cuda] Driver changes to compile and stitch together host and device-side CUDA code.

  NOTE: reverts r242077 to reinstate r242058, r242065, 242067
        and includes fix for OS X test failures.

  - Changed driver pipeline to compile host and device side of CUDA
    files and incorporate results of device-side compilation into host
    object file.

  - Added a test for cuda pipeline creation in clang driver.

  New clang options:
  --cuda-host-only   - Do host-side compilation only.
  --cuda-device-only - Do device-side compilation only.

  --cuda-gpu-arch=<ARCH> - specify GPU architecture for device-side
    compilation. E.g. sm_35, sm_30. Default is sm_20. May be used more
    than once in which case one device-compilation will be done per
    unique specified GPU architecture.

  Differential Revision: http://reviews.llvm.org/D9509

llvm-svn: 242085

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/tools/libclang/CIndex.cpp b/clang/tools/libclang/CIndex.cpp
index 49b9da23865..6e48bab9f50 100644
--- a/clang/tools/libclang/CIndex.cpp
+++ b/clang/tools/libclang/CIndex.cpp
@@ -3102,6 +3102,12 @@ static void clang_parseTranslationUnit_Impl(void *UserData) {
       /*AllowPCHWithCompilerErrors=*/true, SkipFunctionBodies,
       /*UserFilesAreVolatile=*/true, ForSerialization, &ErrUnit));
 
+  // Early failures in LoadFromCommandLine may return with ErrUnit unset.
+  if (!Unit && !ErrUnit) {
+    PTUI->result = CXError_ASTReadError;
+    return;
+  }
+
   if (NumErrors != Diags->getClient()->getNumErrors()) {
     // Make sure to check that 'Unit' is non-NULL.
     if (CXXIdx->getDisplayDiagnostics())