Hi! On Sat, Jul 05, 2025 at 11:10:05PM +0800, Xi Ruoyao wrote: > Possibly this is https://gcc.gnu.org/PR101882. Specifically comment 5 > from Segher: > > "The LRA change is correct AFAICS. But combine makes a change that > violates the earlyclobber... I need to do something about that, too."
See my comment in that PR. The loongarch machine description explicitly allows operand 1 to be the same as operand 0. combine has notyhing to do with this, the pattern it ended up with is recognised by recog(), exactly as it should be (according to the pattern here, is that "<optab>_alsl_reversesi_extended"?) Segher
