[Driver] Add support for -fno-builtin-foo options.

Addresses PR4941 and rdar://6756912.
http://reviews.llvm.org/D15195

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@256937 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/include/clang/Basic/LangOptions.h b/include/clang/Basic/LangOptions.h
index bb2d315a6a..736d4e0930 100644
--- a/include/clang/Basic/LangOptions.h
+++ b/include/clang/Basic/LangOptions.h
@@ -109,6 +109,9 @@ public:
   /// \brief Options for parsing comments.
   CommentOptions CommentOpts;
 
+  /// \brief A list of all -fno-builtin-* function names (e.g., memset).
+  std::vector<std::string> NoBuiltinFuncs;
+
   /// \brief Triples of the OpenMP targets that the host code codegen should
   /// take into account in order to generate accurate offloading descriptors.
   std::vector<llvm::Triple> OMPTargetTriples;
@@ -142,6 +145,10 @@ public:
   /// \brief Reset all of the options that are not considered when building a
   /// module.
   void resetNonModularOptions();
+
+  /// \brief Is this a libc/libm function that is no longer recognized as a
+  /// builtin because a -fno-builtin-* option has been specified?
+  bool isNoBuiltinFunc(const char *Name) const;
 };
 
 /// \brief Floating point control options