[llvm-commits] [patch] Change how we handle mandatory unwind tables

[Rafael Ávila de Espíndola]

> The bit in TargetData would be to allow eh-prune to set nounwind (or
> noehframe if we add it). Thinking about it a bit more, I don't think
> there would ever be the need to set noehframe once the FE is done. I
> will give it a try and see what it looks like.

New version is attached. I added a ehframe attribute. Clang sets it if
the ABI mandates ehframes for all functions. The logic for nounwind
remains the same.

Cheers,
Rafael
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