So as of tip of tree, even w/o the patch we no longer see the pattern "beq
<reg>, 0, .L12 "
They are replaced with reg anyways, so the test won't even show issue, even w/o
the fix.
beq a1,a5,.L12
beq a6,t0,.L12
beq a7,t3,.L12
I think a better proxy of improvement would be to grep for vsetvls with null
output VL.
orig
vsetvli a5,a1,e8,mf4,ta,ma
vsetvli t0,a6,e8,mf4,ta,ma
vsetvli zero,a5,e32,m1,tu,ma
vsetvli zero,t0,e32,m1,ta,ma
vsetvli t3,a7,e8,mf4,ta,ma
vsetvli t4,t1,e8,mf4,ta,ma
vsetvli zero,t0,e32,m1,tu,ma
vsetvli zero,t3,e32,m1,tu,ma
vsetvli zero,t4,e32,m1,tu,ma
patch
vsetvli a5,a1,e32,m1,tu,ma
vsetvli t1,t0,e32,m1,tu,ma
vsetvli a2,a1,e32,m1,tu,ma
vsetvli t4,t3,e32,m1,tu,ma
