[PATCH] Allow CodeGen to take advantage of functions that always return arguments

[Chris Lattner]

On Apr 19, 2013, at 10:21 PM, Stephen Lin <swlin at post.harvard.edu> wrote:

>> 
>> Thanks.
>> 
>> Stephen,
>> 
>> The patch didn't apply cleanly. Someone has updated lib/CodeGen/Analysis.cpp. Could you regen your patch? I'll apply it once you send it. :)
>> 
>> -bw
>> 
> 
> Committed as r179925, with additional test for ms-cxx-abi on x86_64
> 'this'-returns.
> 
> Clang patch forthcoming (should be relatively trivial).

Cool.  Have you considered having clang add this attribute for memcpy/memset/strcat and other well known library functions?

-Chris