Alias/template for value

[bearophile]

Joseph Rushton Wakeling:

> Now, I noticed that if instead of declaring the variables 
> start, end, I instead
> manually write out these expressions in the code, I get a small 
> but consistent
> speedup in the program.
>
> So, I'm curious (i) Why?  As I'd have assumed the compiler 
> could optimize away unnecessary variables like this,

Take a look at the asm. And try to compile with ldc2 too.

If gdc is missing such small optimization then I suggest to write 
a small program that shows the problem, and write a gdc bug 
report (that also contains the resulting asm).

Bye,
bearophile