Added support for the Builtin attribute.

The Builtin attribute is an attribute that can be placed on function call site that signal that even though a function is declared as being a builtin,

rdar://problem/13727199

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185049 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/Instructions.cpp b/lib/IR/Instructions.cpp
index d58877e..5878f77 100644
--- a/lib/IR/Instructions.cpp
+++ b/lib/IR/Instructions.cpp
@@ -346,7 +346,7 @@
   setAttributes(PAL);
 }
 
-bool CallInst::hasFnAttr(Attribute::AttrKind A) const {
+bool CallInst::hasFnAttrImpl(Attribute::AttrKind A) const {
   if (AttributeList.hasAttribute(AttributeSet::FunctionIndex, A))
     return true;
   if (const Function *F = getCalledFunction())
@@ -574,7 +574,7 @@
   return setSuccessor(idx, B);
 }
 
-bool InvokeInst::hasFnAttr(Attribute::AttrKind A) const {
+bool InvokeInst::hasFnAttrImpl(Attribute::AttrKind A) const {
   if (AttributeList.hasAttribute(AttributeSet::FunctionIndex, A))
     return true;
   if (const Function *F = getCalledFunction())