dmd codegen improvements

[Walter Bright via Digitalmars-d]

On 8/18/2015 3:04 PM, deadalnix wrote:
> My understanding is that the inliner is in the front end. This definitively do
> not work the way I describe it here.

But it uses a cost function and runs repeatedly until there is no more inlining 
to be done.


> It stand for 'scalar replacement of aggregate' aka SROA (not SRAO).
> You can find literature on the subject.

I'm aware of the technique, though I didn't know the name for it (I always 
called it "horizontal slicing of aggregates"). It is one optimization that dmd 
could significantly benefit from, and wouldn't be too hard to implement. The 
ubiquitous use of ranges makes it a much more important optimization.

I suspect it would net much more than 0.5%.