Forcing inlining of delegates and lazy

[FinalEvilution]

On Tuesday, 1 September 2026 at 17:07:59 UTC, ABrightLight wrote:
> On Tuesday, 1 September 2026 at 15:58:12 UTC, FinalEvilution 
> wrote:
>>
>> If the option doesn't work out would you be able to provide a 
>> reduced test case? I've become rather curious as to what's 
>> going on.
>
> Actually in your sample, if you go over to godbolt.org and 
> compile with LDC and -O5 (or -Oz) you'll see that that 
> `expr();` ends up being:
> ```
>         mov     rdi, r14
>         call    rbx
> ```

-O5 and -O4 are just aliases and are equivalent to -O3.

I just checked myself on goldbolt and ldc inlines and unrolls the 
loop into `_Dmain` without any calls to `times`.
https://godbolt.org/z/sWYzT9sW6
The unused `times` function cannot be eliminated as the binary 
hasn't been linked yet.
Here's another version without the noise of the standard library. 
Uncomment the `//pragma(inline, false)` to see the difference.
https://godbolt.org/z/4Y5q3nv4e
The `foo` function cannot be inlined as there is no function 
body. It is only used for demonstration.