Thread overview
Best way to add templated "intrinsic" functions?
Jan 05
kinke
January 03
I want to add templated functions that always should be inlined, basically templated functions that have special syntax added for it in the parser.

What is the best way to go about this? Is there a better way than adding the functions to object.d in the d-runtime and mark them as "pragma(inline,true"?

Maybe not a LDC specific question.

January 04
On Sunday, 3 January 2021 at 16:54:57 UTC, Ola Fosheim Grøstad wrote:
> I want to add templated functions that always should be inlined, basically templated functions that have special syntax added for it in the parser.
>
> What is the best way to go about this? Is there a better way than adding the functions to object.d in the d-runtime and mark them as "pragma(inline,true"?
>
> Maybe not a LDC specific question.

pragma(inline,true) probably.

If it's worth inlining and you are using LDC, you can have high confidence it will be inlined. There is a bit too much of "forced inlined" in this world, often without any measurements.
January 04
On Monday, 4 January 2021 at 21:52:03 UTC, Guillaume Piolat wrote:
> If it's worth inlining and you are using LDC, you can have high confidence it will be inlined. There is a bit too much of "forced inlined" in this world, often without any measurements.

I am inlining "a < b < c" as "(a<b) && (b<c)" so it is totally worth it. :-)

I got it to work, but haven't checked the asm yet...

January 05
On Sunday, 3 January 2021 at 16:54:57 UTC, Ola Fosheim Grøstad wrote:
> Is there a better way than adding the functions to object.d in the d-runtime and mark them as "pragma(inline,true"?

That's how I would do it, and I don't think it's too bad.

Adding to object.d is in line with other to-template-lowerings; one-liners etc. are probably fine to add directly, more complex functions can be imported and aliased in object.d. [I think object.d needs to be split up to a little library or package at some point...]

And `pragma(inline, true)` is fine for your needs.
January 05
On Tuesday, 5 January 2021 at 17:00:32 UTC, kinke wrote:
> On Sunday, 3 January 2021 at 16:54:57 UTC, Ola Fosheim Grøstad wrote:
>> Is there a better way than adding the functions to object.d in the d-runtime and mark them as "pragma(inline,true"?
>
> That's how I would do it, and I don't think it's too bad.
>
> Adding to object.d is in line with other to-template-lowerings; one-liners etc. are probably fine to add directly, more complex functions can be imported and aliased in object.d. [I think object.d needs to be split up to a little library or package at some point...]

Ok, so if they are marked as always-inline then they won't be generated for linking even though they are present in object.d? Or do I have to mark them in a special way to avoid library-code-gen?

January 05
On Tuesday, 5 January 2021 at 19:51:54 UTC, Ola Fosheim Grøstad wrote:
> Ok, so if they are marked as always-inline then they won't be generated for linking even though they are present in object.d? Or do I have to mark them in a special way to avoid library-code-gen?

Never mind, this was a stupid question. I did not mean library-code-gen as that is not possible for templated code, but code gen for the object file. I guess not, and even if, I guess ldc would prune it away during linkage. So never mind... :-)