[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

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@248299 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 19 insertions, 2 deletions

diff --git a/include/clang/Basic/Builtins.h b/include/clang/Basic/Builtins.h
index 87e2ac7079..27dc615400 100644
--- a/include/clang/Basic/Builtins.h
+++ b/include/clang/Basic/Builtins.h
@@ -56,15 +56,23 @@ struct Info {
 
 /// \brief Holds information about both target-independent and
 /// target-specific builtins, allowing easy queries by clients.
+///
+/// Builtins from an optional auxiliary target are stored in
+/// AuxTSRecords. Their IDs are shifted up by NumTSRecords and need to
+/// be translated back with getAuxBuiltinID() before use.
 class Context {
   const Info *TSRecords;
+  const Info *AuxTSRecords;
   unsigned NumTSRecords;
+  unsigned NumAuxTSRecords;
+
 public:
   Context();
 
   /// \brief Perform target-specific initialization
-  void initializeTarget(const TargetInfo &Target);
-  
+  /// \param AuxTarget Target info to incorporate builtins from. May be nullptr.
+  void InitializeTarget(const TargetInfo &Target, const TargetInfo *AuxTarget);
+
   /// \brief Mark the identifiers for all the builtins with their
   /// appropriate builtin ID # and mark any non-portable builtin identifiers as
   /// such.
@@ -176,6 +184,15 @@ public:
     return getRecord(ID).Features;
   }
 
+  /// \brief Return true if builtin ID belongs to AuxTarget.
+  bool isAuxBuiltinID(unsigned ID) const {
+    return ID >= (Builtin::FirstTSBuiltin + NumTSRecords);
+  }
+
+  /// Return real buitin ID (i.e. ID it would have furing compilation
+  /// for AuxTarget).
+  unsigned getAuxBuiltinID(unsigned ID) const { return ID - NumTSRecords; }
+
 private:
   const Info &getRecord(unsigned ID) const;