On Fri, Mar 2, 2012 at 6:59 PM, Mike Stump <mikest...@comcast.net> wrote:
> On Mar 2, 2012, at 1:33 AM, Richard Guenther wrote:
>>> Interestingly, the C++ frontend also has a pointer_diff function, but
>>> doesn't seem to attempt to optimize. Is there a reason for this?
>> Frontends should not optimize when they are not required to.
> Actually, the frontends should optimize as long as it produces a faster 
> compilation (and they are permitted to).  You're thinking of the rule that 
> proceeded this one, we switch away from many many years back.

Well, I think we should work towards the FEs preserving as much of the
AST that reflects the source program as possible.


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