Re: Inlining policy

[Paul Eggert]

On 4/6/20 11:15 AM, Stefan Monnier wrote:

> I haven't checked whether it has the same performance impact, and
> neither do I know how it compares w.r.t. "portability/reliability", but
> judging just from the patch, I really like it.
>
> Paul?

Although I like the idea, it significantly hurts performance with -O0 (GCC 
9.3.1, x86-64) because it causes GCC to emit excess instructions to save and 
restore inline function arguments to the stack.

I'm testing a patch to use the idea for -Og but not -O0. Here it seems to help 
performance. Unfortunately this means we still need to keep those macros, for -O0.