On Fri, Nov 16, 2018 at 01:33:58PM -0600, Peter Bergner wrote: > On 11/16/18 11:06 AM, Segher Boessenkool wrote: > > Why does the "r" have a "*"? Should it have been just a "?"? > > Maybe Mike remembers why he added it? I'd guess it was probably to > try and steer the vector modes away from GPRs. However, since that > alternative was also suppose to handle TImode, "*" is probably not > what we want for that. The constraint for the new combines alternative > uses a mode iterator so that the vector modes use "??r" while TImode > uses "r". I think that is what we want.
I imagine when I made the original change we had a different move for TImode (and the -mvsx-timode hack) than for vector modes. And it was likely pre-LRA also. -- Michael Meissner, IBM IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA email: meiss...@linux.ibm.com, phone: +1 (978) 899-4797
