https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61586

--- Comment #3 from Richard Henderson <rth at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #2)
> (I also wonder why we have to break the loop for naked USEs and CLOBBERs. We
> should just skip the problematic insn and continue - as proposed in the
> above patch).

Because it's not breaking out of the loop, it's breaking
out of the switch, case INSN.

I don't think we should special-case TRAP_IF, but rather
special-case BARRIER.  Suppose some -O0 test case involving
__builtin_unreachable, which expands to no code at all.

Otherwise, I think the close_shadow_notrapb change is good.

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