[llvm-dev] Prevent LLVM optimizations from erasing unused basic blocks

[Tim Northover via llvm-dev]

On Tue, 9 Oct 2018 at 21:03, Gleb Popov via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> Won't @llvm.returnaddress() always get me correct location of my inline asm block?

Why would it? That's the address of the callee and there's no reason
it should correlate with anything whatsoever in the current function.
Before now it sounded like you were using that as some way to trick
LLVM into keeping your block around, which would have no effect on its
position.

Cheers.

Tim.