commoning up template instantiations

[Jay Foad]

I've raised https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68219

Jay.

On 4 November 2015 at 10:43, Jay Foad <jay.foad@gmail.com> wrote:
> Thanks both. Would it be realistic to teach IPA ICF that in this case,
> taking the address of the functions doesn't matter? Should I raise an
> enhancement request?
>
> Thanks,
> Jay.
>
> On 4 November 2015 at 10:41, Alexander Monakov <amonakov@ispras.ru> wrote:
>> Starting from release 5.1, GCC has IPA ICF (identical code folding) that can
>> perform such transform: you can use -fdump-ipa-icf to inspect its log file.
>> However, it doesn't eliminate the functions in your example, because they have
>> their address taken (and the pass does not realize that it doesn't matter).
>> Therefore it creates a wrapper rather than an alias, and then inlining undoes
>> that transform.
>>
>> Alexander