On Fri, Apr 21, 2023 at 12:38:07PM +0100, Jiaxun Yang wrote: > > > > 2023年4月21日 11:48，Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx> 写道： > > > > On Sun, Apr 09, 2023 at 11:43:06AM +0100, Jiaxun Yang wrote: > >> parse_r helper is used to parse register number from oprand, > >> it only handles oprand which use number to refer register before. > >> > >> However compiler may use $gp and $sp to reference register 29 and > >> 30. Handle this situation by adding relevant match name. > > > > are you sure the compiler is doing that ? Which compiler is this ? > > To me this feels more like missing #defines from asm/regdef.h for > > some inline assembly stuff... > > Yes, clang is doing that, see[1]. > > There is no inline assembly mentioning $fp for cfcmsa but clang is still generating $fp for > cfcmsa. > > I was able to reproduce this by dumping assembly generated by clang, but I’m > unable to reproduce it for now, it seems like clang will only allocate $fp in rare cases. so is this clang miss-behaviour ? If yes fix should be done there. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]
