dmd codegen improvements

[Dicebot via Digitalmars-d]

On Tuesday, 18 August 2015 at 12:37:37 UTC, Vladimir Panteleev 
wrote:
> I think stability of the DMD backend is a goal of much higher 
> value than the performance of the code it emits. DMD is never 
> going to match the code generation quality of LLVM and GCC, 
> which have had many, many man-years invested in them. Working 
> on DMD optimizations is essentially duplicating this work, and 
> IMHO I think it's not only a waste of time, but harmful to D 
> because of the risk of regressions.

+1