clang tries to follow gcc's implementation for message dispatch (which is based on the document list below). Note that, gcc's implementation may have since diverted from the document (gcc-4.2 on Leopard). If you find cases that does notmatch from that (or is plain wrong), please file bug report.
- Thanks, Fariborz On Apr 29, 2009, at 2:32 PM, Eli Friedman wrote: > On Wed, Apr 29, 2009 at 1:54 PM, Fariborz Jahanian <[email protected] > > wrote: >> 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. > > I assume you don't mean that %rax *always* gets set to 0? It should > depend on the number of floating-point arguments. > > On a side note, the handling for floating-point return values looks > seriously broken; see > http://lists.apple.com/archives/cocoa-dev/2008/Feb/msg02338.html . > > -Eli _______________________________________________ cfe-commits mailing list [email protected] http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
