Fix crash in rtl verifier

[Andreas Schwab]

Eric Botcazou <ebotcazou@adacore.com> writes:

>> While hunting down another bug I experienced a crash in
>> rtl_verify_flow_info_1: a BARRIER insn doesn't have a bb pointer.
>> Although the crash does not happen any more with the specific test case
>> I used, this still looks obvious to me, so I checked it in.
>
> That looks questionable to me.  While it's true that a BARRIER insn doesn't 
> have a bb pointer, the opposite holds as well: a BARRIER should not appear in 
> a basic block.  So your change might end up hiding the real problem.

Do you think I should revert it?

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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