[CUDA] Allow parsing of host and device code simultaneously.

 * adds -aux-triple option to specify target triple
 * propagates aux target info to AST context and Preprocessor
 * pulls in target specific preprocessor macros.
 * pulls in target-specific builtins from aux target.
 * sets appropriate host or device attribute on builtins.

Differential Revision: http://reviews.llvm.org/D12917

llvm-svn: 248299

1 files changed, 5 insertions, 5 deletions

diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 22d2d3469f6..9195a060dbf 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -11293,11 +11293,11 @@ void Sema::AddKnownFunctionAttributes(FunctionDecl *FD) {
     if (getLangOpts().CUDA && getLangOpts().CUDATargetOverloads &&
         Context.BuiltinInfo.isTSBuiltin(BuiltinID) &&
         !FD->hasAttr<CUDADeviceAttr>() && !FD->hasAttr<CUDAHostAttr>()) {
-      // Target-specific builtins are assumed to be intended for use
-      // in this particular CUDA compilation mode and should have
-      // appropriate attribute set so we can enforce CUDA function
-      // call restrictions.
-      if (getLangOpts().CUDAIsDevice)
+      // Assign appropriate attribute depending on CUDA compilation
+      // mode and the target builtin belongs to. E.g. during host
+      // compilation, aux builtins are __device__, the rest are __host__.
+      if (getLangOpts().CUDAIsDevice !=
+          Context.BuiltinInfo.isAuxBuiltinID(BuiltinID))
         FD->addAttr(CUDADeviceAttr::CreateImplicit(Context, FD->getLocation()));
       else
         FD->addAttr(CUDAHostAttr::CreateImplicit(Context, FD->getLocation()));