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Re: [PATCH] Remove dead labels to increase superblock scope
On Fri, Nov 25, 2011 at 2:03 PM, Michael Matz <matz@suse.de> wrote:
> Hi,
>
> On Fri, 25 Nov 2011, Tom de Vries wrote:
>
>> > Note that you actually can remove labels also if they are
>> > !can_delete_label_p, if you use delete_insn (which you do). ?It will
>> > replace such undeletable labels by a DELETED_LABEL note.
>>
>> I tried that as well but ran into these errors in rtl_verify_flow_info_1:
>> ...
>> libquadmath/printf/cmp.c:56:1: error: NOTE_INSN_BASIC_BLOCK is missing for block 6
>> libquadmath/printf/cmp.c:56:1: error: NOTE_INSN_BASIC_BLOCK 79 in middle of
>> basic block 6
>
> Hmpf, probably bitrotted over time. ?Oh well, so be it.
No, DELETED_LABEL notes still work just fine. It depends on how you
remove the label and replace it with a note, and Tom isn't showing
what he did, so...
Ciao!
Steven