[PATCH] D107897: [FuncSpec] Don't specialize function which are easy to inline

Mon Aug 16 04:41:35 PDT 2021

ChuanqiXu added a comment.

In D107897#2944565 <https://reviews.llvm.org/D107897#2944565>, @snehasish wrote:

>> Let me sure if I understand your words correctly. It looks like that you are asking: with function specialization, how the compile-time, code-sizes and performance changes?
>> There are results in `D93838`. Simply, the compile-time and code-size change is not aggressive. And the performance change mainly good for 500.mcf_r by 10%.
>
> I was asking if there is a broader characterization <https://reviews.llvm.org/D36432#:~:text=Benchmark,%23%20Specialized%20Funcs> for this work like the 2017 patch contained.

Here is the result:

| benchamrk       | specialized number before this patch | specialized number after this patch |
| --------------- | ------------------------------------ |                                     |
| 500.perlbench_r | 7                                    | 5                                   |
| 502.gcc_r       | 45                                   | 28                                  |
| 505.mcf_r       | 2                                    | 2                                   |
| 525.x264_r      | 2                                    | 0                                   |
| 557.xz_r        | 4                                    | 4                                   |

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D107897/new/

https://reviews.llvm.org/D107897