return after trap

[Ulrich Weigand via llvm-commits]

Jonas Paulsson <paulsson at linux.vnet.ibm.com> wrote on 09.06.2017 15:40:03:

> At -O1 and higher these are both optimized to have the ret removed:
>
> *** IR Dump After Simplify the CFG ***
> ; Function Attrs: nounwind
> define void @test0() #0 {
> entry:
>   call void @llvm.trap()
>   unreachable
> }
>
> , so only at -O0 is there a ret remaining.

So if we run the whole thing through clang at -O0 (with expensive
checks), do we still get errors?

Bye,
Ulrich
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