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Re: [PATCH] Restrict LOOP_ALIGN to loop headers only.
On July 9, 2019 3:10:19 PM GMT+02:00, Michael Matz <matz@suse.de> wrote:
>Hi,
>
>On Tue, 9 Jul 2019, Richard Biener wrote:
>
>> > So a "backedge" in this sense would be e->dest->index <
>e->src->index.
>> > No?
>>
>> To me the following would make sense.
>
>The basic block index is not a DFS index, so no, that's not a test for
>backedge.
I think in CFG RTL mode the BB index designates the order of the BBs in the object file? So this is a way to identify backwards jumps?
Richard.
>
>Ciao,
>Michael.