[cfe-dev] How to interpret the option `-finline-hint-functions`?

[Reid Kleckner via cfe-dev]

I believe you are correct. I think [1] is implied by most -O levels, and it
mainly exists so that users can use the negative version of it,
-fno-inline-functions. I think [2] exists to give users an in between level
when the user finds the compiler's decisions to be too aggressive, either
for performance or debugging reasons.

On Thu, Jan 30, 2020 at 9:35 AM Mahesha S via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> Hi-
>
> We have following clang options which are related to function inlining.
>
> [1].  -finline-functions:      Inline suitable functions
> [2].  -finline-hint-functions:      Inline functions which are (explicitly
> or implicitly) marked inline
>
> My interpretation of [1] is that we inform the compiler - to take a
> decision about function inlining on its own discretion, that way, it may
> chose to inline few functions which are not explicitly marked with the
> `inline` keyword and may chose *not *to inline few functions which
> are explicitly marked with `inline` keyword.
>
> Again, my interpretation of [2] is that we inform the compiler - to take
> a decision about function inlining on its own discretion, but, in this
> case, about *only *the functions which are explicitly marked with the
> `inline` keyword, nothing else.
>
> Am I correct with my above understanding?
>
> --
> Thanks,
> Mahesha
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