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March 05, 2017 Phobos and LTO | ||||
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Is Phobos compiled with LTO enabled? |
March 05, 2017 Re: Phobos and LTO | ||||
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Posted in reply to Las | On Sunday, 5 March 2017 at 17:17:13 UTC, Las wrote:
> Is Phobos compiled with LTO enabled?
There is no LTO with D.
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March 05, 2017 Re: Phobos and LTO | ||||
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Posted in reply to Temtaime | Dne 5.3.2017 v 20:31 Temtaime via Digitalmars-d napsal(a): > On Sunday, 5 March 2017 at 17:17:13 UTC, Las wrote: >> Is Phobos compiled with LTO enabled? > > There is no LTO with D. Yes it is https://johanengelen.github.io/ldc/2016/11/10/Link-Time-Optimization-LDC.html |
March 05, 2017 Re: Phobos and LTO | ||||
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Posted in reply to Las | On 3/5/17 6:17 PM, Las wrote:
> Is Phobos compiled with LTO enabled?
LTO is *link* time optimization so I'd say it makes no sense for libraries, as they are not linked.
---
Dmitry Olshansky
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March 05, 2017 Re: Phobos and LTO | ||||
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Posted in reply to Dmitry Olshansky | On Sunday, 5 March 2017 at 21:00:32 UTC, Dmitry Olshansky wrote:
> On 3/5/17 6:17 PM, Las wrote:
>> Is Phobos compiled with LTO enabled?
>
> LTO is *link* time optimization so I'd say it makes no sense for libraries, as they are not linked.
>
> ---
> Dmitry Olshansky
Shared libraries are linked.
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March 05, 2017 Re: Phobos and LTO | ||||
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Posted in reply to Dmitry Olshansky | On Sunday, 5 March 2017 at 21:00:32 UTC, Dmitry Olshansky wrote:
> On 3/5/17 6:17 PM, Las wrote:
>> Is Phobos compiled with LTO enabled?
>
> LTO is *link* time optimization so I'd say it makes no sense for libraries, as they are not linked.
Static libraries _are_ linked into your executable and LTO is very relevant for libraries.
Having druntime and/or Phobos compiled with LTO enabled can provide massive speedups.
I have not worked on it yet, but it'd be awesome if we could ship LDC with LTO versions of druntime and Phobos. PRs with additions to our CMake files are very welcome! :-)
cheers,
Johan
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March 05, 2017 Re: Phobos and LTO | ||||
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Posted in reply to Daniel Kozak | On Sunday, 5 March 2017 at 19:52:12 UTC, Daniel Kozak wrote:
> Dne 5.3.2017 v 20:31 Temtaime via Digitalmars-d napsal(a):
>
>> On Sunday, 5 March 2017 at 17:17:13 UTC, Las wrote:
>>> Is Phobos compiled with LTO enabled?
>>
>> There is no LTO with D.
> Yes it is
> https://johanengelen.github.io/ldc/2016/11/10/Link-Time-Optimization-LDC.html
And it appeared first in the recent LDC 1.1 release.
-Johan
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March 07, 2017 Re: Phobos and LTO | ||||
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Posted in reply to Daniel Kozak | On Sunday, 5 March 2017 at 19:52:12 UTC, Daniel Kozak wrote:
> Dne 5.3.2017 v 20:31 Temtaime via Digitalmars-d napsal(a):
>
>> On Sunday, 5 March 2017 at 17:17:13 UTC, Las wrote:
>>> Is Phobos compiled with LTO enabled?
>>
>> There is no LTO with D.
> Yes it is
> https://johanengelen.github.io/ldc/2016/11/10/Link-Time-Optimization-LDC.html
Being specific only for LDC and only on linux - it's a lie to say simple « yes ».
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March 07, 2017 Re: Phobos and LTO | ||||
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Posted in reply to Temtaime | On Tuesday, 7 March 2017 at 18:15:52 UTC, Temtaime wrote:
> On Sunday, 5 March 2017 at 19:52:12 UTC, Daniel Kozak wrote:
>> Dne 5.3.2017 v 20:31 Temtaime via Digitalmars-d napsal(a):
>>
>>> On Sunday, 5 March 2017 at 17:17:13 UTC, Las wrote:
>>>> Is Phobos compiled with LTO enabled?
>>>
>>> There is no LTO with D.
>> Yes it is
>> https://johanengelen.github.io/ldc/2016/11/10/Link-Time-Optimization-LDC.html
>
> Being specific only for LDC and only on linux - it's a lie to say simple « yes ».
Cheer up, you wrote "there is no LTO with D", which there clearly is. :-)
It works on OS X too.
And OS X is the only platform for which we package the LTO linker binaries in the release.
-Johan
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March 07, 2017 Re: Phobos and LTO | ||||
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Posted in reply to Johan Engelen | On Tuesday, 7 March 2017 at 18:42:40 UTC, Johan Engelen wrote: > > It works on OS X too. > And OS X is the only platform for which we package the LTO linker binaries in the release. Has anybody tried LLD on Windows for D already? https://lld.llvm.org/windows_support.html If LLD works (or another linker that can use the LLVM plugin), then LTO is also available on Windows. -Johan |
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