; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=aarch64-unknown-unknown -global-isel | FileCheck %s --check-prefixes=GISEL

; fold (sub -1, a) -> (xor a, -1)
define i64 @sub_minus_one(i64 %a) {
; GISEL-LABEL: sub_minus_one:
; GISEL:       // %bb.0: // %entry
; GISEL-NEXT:    mvn x0, x0
; GISEL-NEXT:    ret
entry:
  %sub1 = sub i64 -1, %a
  ret i64 %sub1
}

define <8 x i16> @sub_minus_one_vec(<8 x i16> %x) {
; GISEL-LABEL: sub_minus_one_vec:
; GISEL:       // %bb.0:
; GISEL-NEXT:    mvn v0.16b, v0.16b
; GISEL-NEXT:    ret
  %sub1 = sub <8 x i16> <i16 -1, i16 -1, i16 -1, i16 -1, i16 -1, i16 -1, i16 -1, i16 -1>, %x
  ret <8 x i16> %sub1
}

define i64 @sub_one_from_sub(i64 %a, i64 %b) {
; GISEL-LABEL: sub_one_from_sub:
; GISEL:       // %bb.0: // %entry
; GISEL-NEXT:    mvn x8, x1
; GISEL-NEXT:    add x0, x8, x0
; GISEL-NEXT:    ret
entry:
; fold (A - B) - 1  ->  add (xor B, -1), A
  %sub1 = sub i64 %a, %b
  %sub2 = sub i64 %sub1, 1
  ret i64 %sub2
}

; fold (A - B) - 1  ->  add (xor B, -1), A
define i64 @sub_one_from_sub_one_use(i64 %a, i64 %b) {
; GISEL-LABEL: sub_one_from_sub_one_use:
; GISEL:       // %bb.0: // %entry
; GISEL-NEXT:    sub x8, x0, x1
; GISEL-NEXT:    sub x9, x8, #1
; GISEL-NEXT:    mul x0, x8, x9
; GISEL-NEXT:    ret
entry:
; fold (A - (0 - B)) to (A + B)
  %sub1 = sub i64 %a, %b
  %sub2 = sub i64 %sub1, 1
  %mul = mul i64 %sub1, %sub2
  ret i64 %mul
}