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Re: [PATCH 09/25] Elide repeated RTL elements.
On 9/12/18 2:46 AM, Andrew Stubbs wrote:
> On 11/09/18 23:45, Jeff Law wrote:
>> Does this need a corresponding change to the RTL front-end so that it
>> can read the new form?
>
> There's an RTL front-end? When did that happen... clearly I've not been
> paying attention.
Within the last couple years. It's primarily for testing purposes so
that we can take RTL, feed it back into a pass and then look at the
results. There's some tests in the testsuite you can poke at to see how
it works -- they're probably also a good starting point for a test that
we can properly reconstruct RTL with elided elements.
>
> If it's expected that dumps can be fed back in unmodified then yes, it
> needs to recognise the new output.
I don't think it goes in strictly unmodified, but ISTM we need to be
able to handle this case.
Thanks,
Jeff