available_externall linkage is not local, this was confusing the codegenerator,

and it wasn't generating calls through @PLT for these functions.
hasLocalLinkage() is now false for available_externally,
I attempted to fix the inliner and dce to handle available_externally properly.
It passed make check.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72328 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/BasicInliner.cpp

@@ -130,7 +130,8 @@ void BasicInlinerImpl::inlineFunctions() {
         
         // Inline
         if (InlineFunction(CS, NULL, TD)) {
-          if (Callee->use_empty() && Callee->hasLocalLinkage())
+          if (Callee->use_empty() && (Callee->hasLocalLinkage() ||
+                                      Callee->hasAvailableExternallyLinkage()))
             DeadFunctions.insert(Callee);
           Changed = true;
           CallSites.erase(CallSites.begin() + index);