https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109657
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Ever confirmed|0 |1 Last reconfirmed| |2023-04-28 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md index 022eef80bc1..5109e8abdbe 100644 --- a/gcc/config/aarch64/aarch64.md +++ b/gcc/config/aarch64/aarch64.md @@ -4203,6 +4203,30 @@ (define_insn "*cmovsi_insn_uxtw" [(set_attr "type" "csel, csel, csel, csel, csel, mov_imm, mov_imm")] ) +;; Convert -(cmp) | a into cmp ? -1 : a to be canonical in the backend. +;;(set (reg/i:SI 0 x0) +;; (ior:SI (neg:SI (ne:SI (reg:CC 66 cc) +;; (const_int 0 [0]))) +;; (reg:SI 102))) + + +(define_insn_and_split "*cmov<mode>_insn_m1" + [(set (match_operand:GPI 0 "register_operand" "=r") + (ior:GPI + (neg:GPI + (match_operator:GPI 1 "aarch64_comparison_operator" + [(match_operand 2 "cc_register" "") (const_int 0)])) + (match_operand 3 "register_operand" "r")))] + "" + "#" + "&& true" + [(set (match_dup 0) + (if_then_else:GPI (match_dup 1) + (const_int -1) (match_dup 3)))] + {} + [(set_attr "type" "csel")] +) + (define_insn "*cmovdi_insn_uxtw" [(set (match_operand:DI 0 "register_operand" "=r") (if_then_else:DI Will clean up the comment and add a testcase tomorrow.