Revert lldb change for Attribute::NoBuiltin

NoBuiltin was introduced after clang/llvm 3.3 and thus does not exist in
FreeBSD.  Thus special handling for the attribute is not needed in lldb.

This reverts lldb r186990 (git eebd175)

Sponsored by:	DARPA, AFRL

1 files changed, 0 insertions, 14 deletions

diff --git a/contrib/llvm/tools/lldb/source/Expression/IRForTarget.cpp b/contrib/llvm/tools/lldb/source/Expression/IRForTarget.cpp
index cac3fdf..dc27b65 100644
--- a/contrib/llvm/tools/lldb/source/Expression/IRForTarget.cpp
+++ b/contrib/llvm/tools/lldb/source/Expression/IRForTarget.cpp
@@ -356,20 +356,6 @@ IRForTarget::ResolveFunctionPointers(llvm::Module &llvm_module)
         
         if (value_ptr)
             *value_ptr = value;
-
-        // If we are replacing a function with the nobuiltin attribute, it may
-        // be called with the builtin attribute on call sites. Remove any such
-        // attributes since it's illegal to have a builtin call to something
-        // other than a nobuiltin function.
-        if (fun->hasFnAttribute(Attribute::NoBuiltin)) {
-            Attribute builtin = Attribute::get(fun->getContext(), Attribute::Builtin);
-
-            for (auto u = fun->use_begin(), e = fun->use_end(); u != e; ++u) {
-                if (auto call = dyn_cast<CallInst>(*u)) {
-                    call->removeAttribute(AttributeSet::FunctionIndex, builtin);
-                }
-            }
-        }
         
         fun->replaceAllUsesWith(value);
     }