On 22 May 2017 at 22:51, Johan Engelen via Digitalmars-d-announce
<digitalmars-d-announce@puremagic.com> wrote:
> On Monday, 22 May 2017 at 15:05:24 UTC, Andrei Alexandrescu wrote:
>>
>> http://dlang.org/blog/2017/05/22/introspection-introspection-everywhere/
>> -- Andrei
>
>
> A fun read!
>
> "(Late at night, I double checked. Mozilla’s CheckedInt is just as bad as I
> remembered. They do a division to test for multiplication overflow. Come on,
> put a line of assembler in there! Portability is worth a price, just not any
> price.)"
>
> Shocked: do you use assembly in Checked and cripple the optimizer?!?!
> Luckily, no. But LDC and GDC do create the `seto` instruction I think you
> were hinting at:
> https://godbolt.org/g/0jUhgs
>

So for LDC to be as good as GDC, you need to need to compile with
-enable-ldc-amazing-feature-cross-module-inlining?

> (LDC doesn't do as good as it could,
> https://github.com/ldc-developers/ldc/issues/2131)
>

If you want a hint (though it's not my place to say), LLVM I'm told is
a reasonably OK compiler, and any reasonably OK compiler should come
with overflow intrinsics - try using them directly.

(Turning off mild morning sarcasm).

Iain.

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