On Tue, 30 May 2023, HAO CHEN GUI via Gcc-patches wrote: > +++ b/gcc/config/rs6000/rs6000.md > @@ -7891,6 +7891,36 @@ (define_insn "*mov<mode>_internal2" > (set_attr "dot" "yes") > (set_attr "length" "4,4,8")]) > > +(define_peephole2 > + [(set (match_operand:CC 2 "cc_reg_operand" "") > + (compare:CC (match_operand:P 1 "int_reg_operand" "") > + (const_int 0))) > + (set (match_operand:P 0 "int_reg_operand" "")
A random comment from the sideline: I'd suggest to remove the (empty) constraints string from your peephole2's. It can be a matter of port-specific-taste but it seems removing them would be consistent with the other peephole2's in rs6000.md. (In this matter, I believe the examples in md.texi are bad.) brgds, H-P
