[llvm-dev] RFC: Inlining report

[Easwaran Raman via llvm-dev]

This is certainly very useful! My comments are related to determining the
inline reason.

*   -> INLINE: stat (35<=487)*
>
> *      <<Callee is single basic block>>*
>
In the above example, the callee would have been inlined even if the single
BB bonus is not applied to the threshold (since 35 <= 225). The fact that
it is single BB didn't tip the scales. If the stat were, say, (300 <= 487),
then the fact that it is a single BB is crucial. Perhaps, there could be a
way to specify a primary reason and many secondary reasons?


*   -> INLINE: setExit (15<=225)*
>
> *      <<Inlining is profitable>>*
>

I think it is more useful to know why it is profitable. At the minimum it
will be useful to differentiate between a callee that is so small that it
will get inlined at any callsite vs a callee that is profitable to inline
at this callsite due to instruction simplification.


>
> Thanks,
Easwaran
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