Add -fobjc-gc and -fobjc-gc-only options to the driver.

Add corresponding enum in LangOptions.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@50387 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 17 insertions, 5 deletions

diff --git a/include/clang/Basic/LangOptions.h b/include/clang/Basic/LangOptions.h
index 3975c51b9f..589153f47e 100644
--- a/include/clang/Basic/LangOptions.h
+++ b/include/clang/Basic/LangOptions.h
@@ -21,6 +21,7 @@ namespace clang {
 /// LangOptions - This class keeps track of the various options that can be
 /// enabled, which controls the dialect of C that is accepted.
 struct LangOptions {
+  
   unsigned Trigraphs         : 1;  // Trigraphs in source files.
   unsigned BCPLComment       : 1;  // BCPL-style '//' comments.
   unsigned DollarIdents      : 1;  // '$' allowed in identifiers.
@@ -34,23 +35,34 @@ struct LangOptions {
   unsigned NoExtensions      : 1;  // All extensions are disabled, strict mode.
   unsigned CXXOperatorNames  : 1;  // Treat C++ operator names as keywords.
     
-  unsigned ObjC1             : 1;  // Objective C 1 support enabled.
-  unsigned ObjC2             : 1;  // Objective C 2 support enabled.
-  
+  unsigned ObjC1             : 1;  // Objective-C 1 support enabled.
+  unsigned ObjC2             : 1;  // Objective-C 2 support enabled.
+    
   unsigned PascalStrings     : 1;  // Allow Pascal strings
   unsigned Boolean           : 1;  // Allow bool/true/false
   unsigned WritableStrings   : 1;  // Allow writable strings
   unsigned LaxVectorConversions : 1;
-    
+  
+private:
+  unsigned GC : 2; // Objective-C Garbage Collection modes.  We declare
+                   // this enum as unsigned because MSVC insists on making enums
+                   // signed.  Set/Query this value using accessors.  
+public:  
+
+  enum GCMode { NonGC, GCOnly, HybridGC };
+  
   LangOptions() {
     Trigraphs = BCPLComment = DollarIdents = ImplicitInt = Digraphs = 0;
     HexFloats = 0;
-    ObjC1 = ObjC2 = 0;
+    GC = ObjC1 = ObjC2 = 0;
     C99 = Microsoft = CPlusPlus = CPlusPlus0x = NoExtensions = 0;
     CXXOperatorNames = PascalStrings = Boolean = WritableStrings = 0;
     LaxVectorConversions = 0;
   }
   
+  GCMode getGCMode() const { return (GCMode) GC; }
+  void setGCMode(GCMode m) { GC = (unsigned) m; }
+  
   /// Emit - Emit this LangOptions object to bitcode.
   void Emit(llvm::Serializer& S) const;