[llvm-commits] [Review] Attributes Documentation

[Bill Wendling]

On Dec 6, 2012, at 12:55 AM, James Molloy <James.Molloy at arm.com> wrote:

> Hi Bill,
> 
> On Thu, 2012-12-06 at 02:01 +0000, Bill Wendling wrote:
>> In practice, there won't be a large number of differences between
>> functions. The attributes come about in only a few ways:
>> 
>>        - through command line options
>>        - via '__attribute__' declarations
> 
> You forget compiler-added annotations such as
> readonly/readnone/noreturn, which can serve as analysis markers. These
> can get added during optimization passes, so your IR attribute groups
> are going to change during optimization passes (eww).
> 
I forgot about those. But yes, they're changeable. And that's fine. They'll just be given a new attributes object or added onto a list (or set) of attribute objects. The internal representation is still in flux right now. :)

-bw