This pattern is not strictly necessary and a similar effect could be achieved through the use of a suitable compatibility relation for CC modes; in the meantime, this helps on some benchmarks. --- gcc/config/aarch64/aarch64.md | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md index 13a75d3..60e42af 100644 --- a/gcc/config/aarch64/aarch64.md +++ b/gcc/config/aarch64/aarch64.md @@ -2159,6 +2159,19 @@ [(set_attr "type" "alus_reg,alus_imm,alus_imm")] ) +;; variant that generates a CC_NZ output mode +(define_insn "*cmp<mode>_nz" + [(set (reg:CC_NZ CC_REGNUM) + (compare:CC_NZ (match_operand:GPI 0 "register_operand" "r,r,r") + (match_operand:GPI 1 "aarch64_plus_operand" "r,I,J")))] + "" + "@ + cmp\\t%<w>0, %<w>1 + cmp\\t%<w>0, %<w>1 + cmn\\t%<w>0, #%n1" + [(set_attr "type" "alus_reg,alus_imm,alus_imm")] +) + (define_insn "*cmp<mode>" [(set (reg:CCFP CC_REGNUM) (compare:CCFP (match_operand:GPF 0 "register_operand" "w,w") -- 1.9.0