[LLVMdev] isa and friends as an alternative to dynamic cast?

[Chris Lattner]

On Thu, 21 Apr 2005, Jeff Cohen wrote:
> That's a good point.

I think there are some issues with doing this (e.g. EH doesn't work, so 
the very few places we use it would have to be modified), but other than 
that I fully support the idea.

-Chris

> Evan Jones wrote:
>
>> On Thu, 2005-21-04 at 19:43 -0700, Reid Spencer wrote:
>> 
>>> In case it wasn't obvious from Misha's answer, the main reason for
>>> doing this is speed. RTTI is not very quick.
>>> 
>> 
>> Right. This is why I was somewhat suprized to see the "isa" facilities
>> included in LLVM without also disabling rtti. It will reduce the memory
>> footprint a fair bit if you do disable it, at least based on my
>> experience with other C++ projects.
>> 
>> Evan Jones
>> 
>> 
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-Chris

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