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Re: LTO and the inlining of functions only called once.
> Richard Guenther wrote:
>
> >It'll be in /tmp and named after the first object file, in your case it
> >will
> >be ccGGS24.o.047i.inline (because the first object file will be a
> >tempfile). A minor inconvenience that maybe is going to be fixed.
>
> Now that Richard has pointed out to me where the info is, I can post it
> here. This are the inlining decision on my mini-example (just 5
> subroutines and a "main"):
>
> gemini.f hlprog.f main.f phcall.f phtask.f sl2tim.f
>
>
> Reclaiming functions:
> Deciding on inlining. Starting with size 45477.
>
> Inlining always_inline functions:
>
> Deciding on smaller functions:
> Considering inline candidate phcall_.clone.3.
> Inlining failed: --param max-inline-insns-auto limit reached
> Considering inline candidate phtask_.clone.2.
> Inlining failed: --param max-inline-insns-auto limit reached
> Considering inline candidate gemini_.clone.1.
> Inlining failed: --param max-inline-insns-auto limit reached
> Considering inline candidate sl2tim_.clone.0.
> Inlining failed: --param max-inline-insns-auto limit reached
> Considering inline candidate hlprog.
> Inlining failed: --param max-inline-insns-auto limit reached
>
> Deciding on functions called once:
>
> Considering gemini_.clone.1 size 11443.
> Called once from hlprog 462 insns.
> Inlined into hlprog which now has 10728 size for a net change of
> -12620 size.
>
> Considering hlprog size 10728.
> Called once from main 7 insns.
> Inline limit reached, not inlined.
>
> Inlined 1 calls, eliminated 1 functions, size 45477 turned to 32857 size.
>
>
> The mistake made here is that *all* the above functions are "called
> once", but only GEMINI is considered for some reason (probably simply
> because it's the first one ?).
>
> Jan, if you're interested, I can send you the mini-example so that you
> can see for yourself.
Yes, I would be interested. It seems that for osme reason the other
functions are not considered to be called once, perhaps a visibility
issue. We also should say what limit was reached on inlining hlprog.
Honza
>
> HLPROG calls GEMINI, which calls SL2TIM, which calls PHCALL, which calls
> PHTASK (all "only-once calls").
>
> --
> Toon Moene - e-mail: toon@moene.org - phone: +31 346 214290
> Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
> At home: http://moene.org/~toon/
> Progress of GNU Fortran: http://gcc.gnu.org/gcc-4.5/changes.html