DMD backend quality (Was: Re: DIP 1031--Deprecate Brace-Style Struct Initializers--Community Review Round 1 Discussion)

[Walter Bright]

On 2/16/2020 2:52 AM, NaN wrote:
> I was seeing worse than that last time i used DMD, it was mostly int code, no 
> fpu, and it was around 60% slower with DMD than LDC. Haven't used it since. SIMD 
> support with DMD was awful at the time too, dont know if thats improved.

The SIMD code was substantially improved a year or two ago. I added common 
subexpression support and improved the register allocator for it.

The main problem is I made a mistake in putting the inliner in the DMD front 
end. It should be in the back end, where it'll be a lot more effective.