Pull in r183926 from LLVM trunk:

  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.

This allows us to build the __clear_cache function in compiler-rt.

1 files changed, 2 insertions, 1 deletions

diff --git a/contrib/llvm/tools/clang/lib/Sema/SemaDecl.cpp b/contrib/llvm/tools/clang/lib/Sema/SemaDecl.cpp
index e0e8bd6..f72bec0 100644
--- a/contrib/llvm/tools/clang/lib/Sema/SemaDecl.cpp
+++ b/contrib/llvm/tools/clang/lib/Sema/SemaDecl.cpp
@@ -8671,7 +8671,8 @@ Decl *Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Decl *D) {
 
   // Builtin functions cannot be defined.
   if (unsigned BuiltinID = FD->getBuiltinID()) {
-    if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) {
+    if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID) &&
+        !Context.BuiltinInfo.isPredefinedRuntimeFunction(BuiltinID)) {
       Diag(FD->getLocation(), diag::err_builtin_definition) << FD;
       FD->setInvalidDecl();
     }