Allow clang to build __clear_cache on ARM.

__clear_cache is special. It needs no signature, but is a real function in
compiler_rt or libgcc.

Patch by Andrew Turner.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@183926 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/include/clang/Basic/Builtins.h b/include/clang/Basic/Builtins.h
index 77c0461f10..eb156519ae 100644
--- a/include/clang/Basic/Builtins.h
+++ b/include/clang/Basic/Builtins.h
@@ -130,6 +130,13 @@ public:
     return strchr(GetRecord(ID).Attributes, 'f') != 0;
   }
 
+  /// \brief Determines whether this builtin is a predefined compiler-rt/libgcc
+  /// function, such as "__clear_cache", where we know the signature a
+  /// priori.
+  bool isPredefinedRuntimeFunction(unsigned ID) const {
+    return strchr(GetRecord(ID).Attributes, 'i') != 0;
+  }
+
   /// \brief Determines whether this builtin has custom typechecking.
   bool hasCustomTypechecking(unsigned ID) const {
     return strchr(GetRecord(ID).Attributes, 't') != 0;