[cfe-commits] r70404 - /cfe/trunk/lib/CodeGen/CGObjCMac.cpp

[Fariborz Jahanian]

On Apr 29, 2009, at 12:43 PM, Daniel Dunbar wrote:

> Hi Fariborz,
>
> Can you explain this change?
>
> The function type being constructed has known arguments (it is  
> filled in from the actual arguments), so this change doesn't make  
> much sense to me.

It is not needed for 32bit code gen of  objc_msgSend. But when  
objc_msgSend is used in 64bit API (something I have done locally),
it is necessary for the lower byte of %rax register to get set to 0. I  
thought that I set this unconditionally
for now. After all, objc_msgSend is a vararg function and is declared  
as such. If this causes problem in 32bit mode,  I can set it back
to false.

- Fariborz


>