Disable function inlining

[Vishal Sharma]

   Hi,

   How can I force ISPC not to inline certain functions?

   Does it support something like "_attribute__ ((noinline))" which is available in gcc and clang?

   Thanks,
   Vishal

[Dmitry Babokin]

AFAIK, there's no such attribute.

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[Vishal Sharma]

Thanks Dmitry!

In my case, I am trying to implement a transformation pass which looks for call instructions calling one of the functions that I have implemented. These functions don't do anything useful, just a placeholder (which is the reason why they are getting inlined). However, I use these function-calls as identifiers at IR level to identify sections where I should apply my transformation. So it is very important in my case that they don't get inlined.

I would really appreciate if you could provide some pointers for disabling automatic inlining in the ISPC code, thanks!

Vishal

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Thanks
Vishal

[Matt Pharr]

How about declaring your special functions as 'extern' functions (without a definition)? Then they'll survive in the IR...

(ispc does effectively this with scatters and gathers; they are turned into unresolved function calls at first, which later passes try to simplify into simple loads/stores when possible, and are otherwise eventually turned into either native instructions or expanded out into individual loads/stores, depending on the target...)

Thanks,

Matt

[Vishal Sharma]

Great, it works! Thanks, Matt!