efriedma added inline comments.
================
Comment at: clang/lib/CodeGen/CGExpr.cpp:5219
+ // function.
+ else if (!CGF.CurFn->getAttributes().hasFnAttr(AttributeNoBuiltin))
return CGCallee::forBuiltin(builtinID, FD);
----------------
steplong wrote:
> hans wrote:
> > What if CurFn has the "wildcard" no-builtins attribute?
> Hmmm, good question. Currently, "*" generates a warning. I was able to get
> "*" to add the attribute no-builtins to the function, but if I try making it
> affect the calls in the function, I see a compiler crash when compiling
> compiler-rt. It looks like some builtins must be generated even if
> -fno-builtins is called such as __sync_lock_test_and_set_1. I'm not sure how
> to check for that.
I think you're looking for isPredefinedLibFunction()
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D124701/new/
https://reviews.llvm.org/D124701
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