rjmccall added a comment.
It just occurred to me that there is a way to test this in Clang with the
asm-label extension:
int Foo_class asm("OBJC_CLASS_$_Foo");
Of course, you'll have to actually use it from somewhere, or define it, in
order for it to actually show up in the IR and cause a conflict.
You should probably also test that we do something sane if the caller is making
a definition but one already exists. An error counts as "sane"; just make sure
you return a GlobalVariable of the right type. There's model code for this in
GetOrCreateLLVMFunction, although it's okay for the diagnostic here to be worse
than that one.
Repository:
rL LLVM
http://reviews.llvm.org/D13954
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