; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=aarch64-unknown-linux-gnu -mattr=+sve2 < %s | FileCheck %s --check-prefixes=CHECK

define <vscale x 4 x i32> @bsl(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b) {
; CHECK-LABEL: bsl:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov z2.s, #0x7fffffff
; CHECK-NEXT:    bsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %1 = and <vscale x 4 x i32> %a, splat(i32 2147483647)
  %2 = and <vscale x 4 x i32> %b, splat(i32 -2147483648)
  %c = or <vscale x 4 x i32> %1, %2
  ret <vscale x 4 x i32> %c
}

define <vscale x 4 x i32> @bsl_add_sub(<vscale x 4 x i32> %pre_cond, <vscale x 4 x i32> %left, <vscale x 4 x i32> %right) #0 {
; CHECK-LABEL: bsl_add_sub:
; CHECK:       // %bb.0:
; CHECK-NEXT:    movprfx z3, z0
; CHECK-NEXT:    subr z3.s, z3.s, #0 // =0x0
; CHECK-NEXT:    mov z0.d, z1.d
; CHECK-NEXT:    bsl z0.d, z0.d, z2.d, z3.d
; CHECK-NEXT:    ret
  %neg_cond = sub <vscale x 4 x i32> zeroinitializer, %pre_cond
  %min_cond = add <vscale x 4 x i32> %pre_cond, splat(i32 -1)
  %left_bits_0 = and <vscale x 4 x i32> %neg_cond, %left
  %right_bits_0 = and <vscale x 4 x i32> %min_cond, %right
  %bsl0000 = or <vscale x 4 x i32> %right_bits_0, %left_bits_0
  ret <vscale x 4 x i32> %bsl0000
}

; we are not expecting bsl instruction here. the constants do not match to fold to bsl.
define <vscale x 4 x i32> @no_bsl_fold(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b) {
; CHECK-LABEL: no_bsl_fold:
; CHECK:       // %bb.0:
; CHECK-NEXT:    and z0.s, z0.s, #0x7fffffff
; CHECK-NEXT:    and z1.s, z1.s, #0x7ffffffe
; CHECK-NEXT:    orr z0.d, z0.d, z1.d
; CHECK-NEXT:    ret
  %1 = and <vscale x 4 x i32> %a, splat(i32 2147483647)
  %2 = and <vscale x 4 x i32> %b, splat(i32 2147483646)
  %c = or <vscale x 4 x i32> %1, %2
  ret <vscale x 4 x i32> %c
}

define <vscale x 16 x i8> @nbsl_i8(<vscale x 16 x i8> %a, <vscale x 16 x i8> %b) {
; CHECK-LABEL: nbsl_i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov z2.b, #127 // =0x7f
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %1 = and <vscale x 16 x i8> %a, splat(i8 127)
  %2 = and <vscale x 16 x i8> %b, splat(i8 -128)
  %3 = or <vscale x 16 x i8> %1, %2
  %4 = xor <vscale x 16 x i8> %3, splat(i8 -1)
  ret <vscale x 16 x i8> %4
}

define <vscale x 8 x i16> @nbsl_i16(<vscale x 8 x i16> %a, <vscale x 8 x i16> %b) {
; CHECK-LABEL: nbsl_i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov z2.h, #32767 // =0x7fff
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %1 = and <vscale x 8 x i16> %a, splat(i16 32767)
  %2 = and <vscale x 8 x i16> %b, splat(i16 -32768)
  %3 = or <vscale x 8 x i16> %1, %2
  %4 = xor <vscale x 8 x i16> %3, splat(i16 -1)
  ret <vscale x 8 x i16> %4
}

define <vscale x 4 x i32> @nbsl_i32(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b) {
; CHECK-LABEL: nbsl_i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov z2.s, #0x7fffffff
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %1 = and <vscale x 4 x i32> %a, splat(i32 2147483647)
  %2 = and <vscale x 4 x i32> %b, splat(i32 -2147483648)
  %3 = or <vscale x 4 x i32> %1, %2
  %4 = xor <vscale x 4 x i32> %3, splat(i32 -1)
  ret <vscale x 4 x i32> %4
}

define <vscale x 2 x i64> @nbsl_i64(<vscale x 2 x i64> %a, <vscale x 2 x i64> %b) {
; CHECK-LABEL: nbsl_i64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov z2.d, #0x7fffffffffffffff
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %1 = and <vscale x 2 x i64> %a, splat(i64 9223372036854775807)
  %2 = and <vscale x 2 x i64> %b, splat(i64 -9223372036854775808)
  %3 = or <vscale x 2 x i64> %1, %2
  %4 = xor <vscale x 2 x i64> %3, splat(i64 -1)
  ret <vscale x 2 x i64> %4
}

; Test BSL/NBSL/BSL1N/BSL2N code generation for:
;   #define BSL(x,y,z)   (  ((x) & (z)) | ( (y) & ~(z)))
;   #define NBSL(x,y,z)  (~(((x) & (z)) | ( (y) & ~(z))))
;   #define BSL1N(x,y,z) ( (~(x) & (z)) | ( (y) & ~(z)))
;   #define BSL2N(x,y,z) (  ((x) & (z)) | (~(y) & ~(z)))

define <vscale x 16 x i8> @codegen_bsl_i8(<vscale x 16 x i8> %0, <vscale x 16 x i8> %1, <vscale x 16 x i8> %2) {
; CHECK-LABEL: codegen_bsl_i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 16 x i8> %2, %0
  %5 = xor <vscale x 16 x i8> %2, splat (i8 -1)
  %6 = and <vscale x 16 x i8> %1, %5
  %7 = or <vscale x 16 x i8> %4, %6
  ret <vscale x 16 x i8> %7
}

define <vscale x 16 x i8> @codegen_nbsl_i8(<vscale x 16 x i8> %0, <vscale x 16 x i8> %1, <vscale x 16 x i8> %2) {
; CHECK-LABEL: codegen_nbsl_i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 16 x i8> %2, %0
  %5 = xor <vscale x 16 x i8> %2, splat (i8 -1)
  %6 = and <vscale x 16 x i8> %1, %5
  %7 = or <vscale x 16 x i8> %4, %6
  %8 = xor <vscale x 16 x i8> %7, splat (i8 -1)
  ret <vscale x 16 x i8> %8
}

define <vscale x 16 x i8> @codegen_bsl1n_i8(<vscale x 16 x i8> %0, <vscale x 16 x i8> %1, <vscale x 16 x i8> %2) {
; CHECK-LABEL: codegen_bsl1n_i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl1n z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = xor <vscale x 16 x i8> %0, splat (i8 -1)
  %5 = and <vscale x 16 x i8> %2, %4
  %6 = xor <vscale x 16 x i8> %2, splat (i8 -1)
  %7 = and <vscale x 16 x i8> %1, %6
  %8 = or <vscale x 16 x i8> %5, %7
  ret <vscale x 16 x i8> %8
}

define <vscale x 16 x i8> @codegen_bsl2n_i8(<vscale x 16 x i8> %0, <vscale x 16 x i8> %1, <vscale x 16 x i8> %2) {
; CHECK-LABEL: codegen_bsl2n_i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl2n z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 16 x i8> %2, %0
  %5 = or <vscale x 16 x i8> %2, %1
  %6 = xor <vscale x 16 x i8> %5, splat (i8 -1)
  %7 = or <vscale x 16 x i8> %4, %6
  ret <vscale x 16 x i8> %7
}

define <vscale x 8 x i16> @codegen_bsl_i16(<vscale x 8 x i16> %0, <vscale x 8 x i16> %1, <vscale x 8 x i16> %2) {
; CHECK-LABEL: codegen_bsl_i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 8 x i16> %2, %0
  %5 = xor <vscale x 8 x i16> %2, splat (i16 -1)
  %6 = and <vscale x 8 x i16> %1, %5
  %7 = or <vscale x 8 x i16> %4, %6
  ret <vscale x 8 x i16> %7
}

define <vscale x 8 x i16> @codegen_nbsl_i16(<vscale x 8 x i16> %0, <vscale x 8 x i16> %1, <vscale x 8 x i16> %2) {
; CHECK-LABEL: codegen_nbsl_i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 8 x i16> %2, %0
  %5 = xor <vscale x 8 x i16> %2, splat (i16 -1)
  %6 = and <vscale x 8 x i16> %1, %5
  %7 = or <vscale x 8 x i16> %4, %6
  %8 = xor <vscale x 8 x i16> %7, splat (i16 -1)
  ret <vscale x 8 x i16> %8
}

define <vscale x 8 x i16> @codegen_bsl1n_i16(<vscale x 8 x i16> %0, <vscale x 8 x i16> %1, <vscale x 8 x i16> %2) {
; CHECK-LABEL: codegen_bsl1n_i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl1n z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = xor <vscale x 8 x i16> %0, splat (i16 -1)
  %5 = and <vscale x 8 x i16> %2, %4
  %6 = xor <vscale x 8 x i16> %2, splat (i16 -1)
  %7 = and <vscale x 8 x i16> %1, %6
  %8 = or <vscale x 8 x i16> %5, %7
  ret <vscale x 8 x i16> %8
}

define <vscale x 8 x i16> @codegen_bsl2n_i16(<vscale x 8 x i16> %0, <vscale x 8 x i16> %1, <vscale x 8 x i16> %2) {
; CHECK-LABEL: codegen_bsl2n_i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl2n z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 8 x i16> %2, %0
  %5 = or <vscale x 8 x i16> %2, %1
  %6 = xor <vscale x 8 x i16> %5, splat (i16 -1)
  %7 = or <vscale x 8 x i16> %4, %6
  ret <vscale x 8 x i16> %7
}

define <vscale x 4 x i32> @codegen_bsl_i32(<vscale x 4 x i32> %0, <vscale x 4 x i32> %1, <vscale x 4 x i32> %2) {
; CHECK-LABEL: codegen_bsl_i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 4 x i32> %2, %0
  %5 = xor <vscale x 4 x i32> %2, splat (i32 -1)
  %6 = and <vscale x 4 x i32> %1, %5
  %7 = or <vscale x 4 x i32> %4, %6
  ret <vscale x 4 x i32> %7
}

define <vscale x 4 x i32> @codegen_nbsl_i32(<vscale x 4 x i32> %0, <vscale x 4 x i32> %1, <vscale x 4 x i32> %2) {
; CHECK-LABEL: codegen_nbsl_i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 4 x i32> %2, %0
  %5 = xor <vscale x 4 x i32> %2, splat (i32 -1)
  %6 = and <vscale x 4 x i32> %1, %5
  %7 = or <vscale x 4 x i32> %4, %6
  %8 = xor <vscale x 4 x i32> %7, splat (i32 -1)
  ret <vscale x 4 x i32> %8
}

define <vscale x 4 x i32> @codegen_bsl1n_i32(<vscale x 4 x i32> %0, <vscale x 4 x i32> %1, <vscale x 4 x i32> %2) {
; CHECK-LABEL: codegen_bsl1n_i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl1n z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = xor <vscale x 4 x i32> %0, splat (i32 -1)
  %5 = and <vscale x 4 x i32> %2, %4
  %6 = xor <vscale x 4 x i32> %2, splat (i32 -1)
  %7 = and <vscale x 4 x i32> %1, %6
  %8 = or <vscale x 4 x i32> %5, %7
  ret <vscale x 4 x i32> %8
}

define <vscale x 4 x i32> @codegen_bsl2n_i32(<vscale x 4 x i32> %0, <vscale x 4 x i32> %1, <vscale x 4 x i32> %2) {
; CHECK-LABEL: codegen_bsl2n_i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl2n z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 4 x i32> %2, %0
  %5 = or <vscale x 4 x i32> %2, %1
  %6 = xor <vscale x 4 x i32> %5, splat (i32 -1)
  %7 = or <vscale x 4 x i32> %4, %6
  ret <vscale x 4 x i32> %7
}

define <vscale x 2 x i64> @codegen_bsl_i64(<vscale x 2 x i64> %0, <vscale x 2 x i64> %1, <vscale x 2 x i64> %2) {
; CHECK-LABEL: codegen_bsl_i64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 2 x i64> %2, %0
  %5 = xor <vscale x 2 x i64> %2, splat (i64 -1)
  %6 = and <vscale x 2 x i64> %1, %5
  %7 = or <vscale x 2 x i64> %4, %6
  ret <vscale x 2 x i64> %7
}

define <vscale x 2 x i64> @codegen_nbsl_i64(<vscale x 2 x i64> %0, <vscale x 2 x i64> %1, <vscale x 2 x i64> %2) {
; CHECK-LABEL: codegen_nbsl_i64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 2 x i64> %2, %0
  %5 = xor <vscale x 2 x i64> %2, splat (i64 -1)
  %6 = and <vscale x 2 x i64> %1, %5
  %7 = or <vscale x 2 x i64> %4, %6
  %8 = xor <vscale x 2 x i64> %7, splat (i64 -1)
  ret <vscale x 2 x i64> %8
}

define <vscale x 2 x i64> @codegen_bsl1n_i64(<vscale x 2 x i64> %0, <vscale x 2 x i64> %1, <vscale x 2 x i64> %2) {
; CHECK-LABEL: codegen_bsl1n_i64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl1n z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = xor <vscale x 2 x i64> %0, splat (i64 -1)
  %5 = and <vscale x 2 x i64> %2, %4
  %6 = xor <vscale x 2 x i64> %2, splat (i64 -1)
  %7 = and <vscale x 2 x i64> %1, %6
  %8 = or <vscale x 2 x i64> %5, %7
  ret <vscale x 2 x i64> %8
}

define <vscale x 2 x i64> @codegen_bsl2n_i64(<vscale x 2 x i64> %0, <vscale x 2 x i64> %1, <vscale x 2 x i64> %2) {
; CHECK-LABEL: codegen_bsl2n_i64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl2n z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
  %4 = and <vscale x 2 x i64> %2, %0
  %5 = or <vscale x 2 x i64> %2, %1
  %6 = xor <vscale x 2 x i64> %5, splat (i64 -1)
  %7 = or <vscale x 2 x i64> %4, %6
  ret <vscale x 2 x i64> %7
}

; (A ^ B) & C) ^ B -> (A & C) | (B & !C) when BIC instructions are available.
define <vscale x 4 x i32> @bsl_combine_when_bic_available(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b, <vscale x 4 x i32> %c) {
; CHECK-LABEL: bsl_combine_when_bic_available:
; CHECK:       // %bb.0: // %entry
; CHECK-NEXT:    bsl z0.d, z0.d, z1.d, z2.d
; CHECK-NEXT:    ret
entry:
  %t1 = xor <vscale x 4 x i32> %a, %b
  %t2 = and <vscale x 4 x i32> %t1, %c
  %t3 = xor <vscale x 4 x i32> %t2, %b
  ret <vscale x 4 x i32> %t3
}

; NOT (a) = NBSL (a, a, a) = SUBR (a, -1).
define <vscale x 2 x i64> @not(<vscale x 2 x i64> %0) #0 {
; CHECK-LABEL: not:
; CHECK:       // %bb.0:
; CHECK-NEXT:    subr z0.b, z0.b, #255 // =0xff
; CHECK-NEXT:    ret
  %2 = xor <vscale x 2 x i64> %0, splat (i64 -1)
  ret <vscale x 2 x i64> %2
}

; NAND (a, b) = NBSL (a, b, b) = NBSL (b, a, a).
define <vscale x 2 x i64> @nand(<vscale x 2 x i64> %0, <vscale x 2 x i64> %1) #0 {
; CHECK-LABEL: nand:
; CHECK:       // %bb.0:
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z1.d
; CHECK-NEXT:    ret
  %3 = and <vscale x 2 x i64> %1, %0
  %4 = xor <vscale x 2 x i64> %3, splat (i64 -1)
  ret <vscale x 2 x i64> %4
}

; NOR (a, b) = NBSL (a, b, a) = NBSL (b, a, b).
define <vscale x 2 x i64> @nor(<vscale x 2 x i64> %0, <vscale x 2 x i64> %1) #0 {
; CHECK-LABEL: nor:
; CHECK:       // %bb.0:
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z0.d
; CHECK-NEXT:    ret
  %3 = or <vscale x 2 x i64> %1, %0
  %4 = xor <vscale x 2 x i64> %3, splat (i64 -1)
  ret <vscale x 2 x i64> %4
}

; EON (a, b) = BSL2N (a, a, b) = BSL2N (b, b, a).
define <vscale x 2 x i64> @eon(<vscale x 2 x i64> %0, <vscale x 2 x i64> %1) #0 {
; CHECK-LABEL: eon:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl2n z0.d, z0.d, z0.d, z1.d
; CHECK-NEXT:    ret
  %3 = xor <vscale x 2 x i64> %0, %1
  %4 = xor <vscale x 2 x i64> %3, splat (i64 -1)
  ret <vscale x 2 x i64> %4
}

; ORN (a, b) = BSL2N (a, b, a).
define <vscale x 2 x i64> @orn(<vscale x 2 x i64> %0, <vscale x 2 x i64> %1) #0 {
; CHECK-LABEL: orn:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl2n z0.d, z0.d, z1.d, z0.d
; CHECK-NEXT:    ret
  %3 = xor <vscale x 2 x i64> %1, splat (i64 -1)
  %4 = or <vscale x 2 x i64> %0, %3
  ret <vscale x 2 x i64> %4
}

; Commute operands of EON idiom to avoid the copy of z0.
define <vscale x 2 x i64> @eon_comm(<vscale x 2 x i1> %m, <vscale x 2 x i64> %a, <vscale x 2 x i64> %b) {
; CHECK-LABEL: eon_comm:
; CHECK:       // %bb.0:
; CHECK-NEXT:    bsl2n z1.d, z1.d, z1.d, z0.d
; CHECK-NEXT:    sel z0.d, p0, z0.d, z1.d
; CHECK-NEXT:    ret
  %xor = xor <vscale x 2 x i64> %a, %b
  %eon = xor <vscale x 2 x i64> %xor, splat (i64 -1)
  %sel = select <vscale x 2 x i1> %m, <vscale x 2 x i64> %a, <vscale x 2 x i64> %eon
  ret <vscale x 2 x i64> %sel
}

; As above for NAND idiom.
define <vscale x 2 x i64> @nand_comm(<vscale x 2 x i1> %m, <vscale x 2 x i64> %a, <vscale x 2 x i64> %b) {
; CHECK-LABEL: nand_comm:
; CHECK:       // %bb.0:
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z1.d
; CHECK-NEXT:    mov z0.d, p0/m, z1.d
; CHECK-NEXT:    ret
  %and = and <vscale x 2 x i64> %a, %b
  %nand = xor <vscale x 2 x i64> %and, splat (i64 -1)
  %sel = select <vscale x 2 x i1> %m, <vscale x 2 x i64> %b, <vscale x 2 x i64> %nand
  ret <vscale x 2 x i64> %sel
}

; As above for NOR idiom.
define <vscale x 2 x i64> @nor_comm(<vscale x 2 x i1> %m, <vscale x 2 x i64> %a, <vscale x 2 x i64> %b) {
; CHECK-LABEL: nor_comm:
; CHECK:       // %bb.0:
; CHECK-NEXT:    nbsl z0.d, z0.d, z1.d, z0.d
; CHECK-NEXT:    mov z0.d, p0/m, z1.d
; CHECK-NEXT:    ret
  %or = or <vscale x 2 x i64> %a, %b
  %nor = xor <vscale x 2 x i64> %or, splat (i64 -1)
  %sel = select <vscale x 2 x i1> %m, <vscale x 2 x i64> %b, <vscale x 2 x i64> %nor
  ret <vscale x 2 x i64> %sel
}

; Neither z0 nor z1 can be clobbered by the EON idiom, so one of them needs copying.
define <vscale x 2 x i64> @eon_needs_mov(<vscale x 2 x i1> %m1, <vscale x 2 x i1> %m2, <vscale x 2 x i64> %a, <vscale x 2 x i64> %b) {
; CHECK-LABEL: eon_needs_mov:
; CHECK:       // %bb.0:
; CHECK-NEXT:    movprfx z2, z0
; CHECK-NEXT:    bsl2n z2.d, z2.d, z0.d, z1.d
; CHECK-NEXT:    sel z0.d, p0, z0.d, z2.d
; CHECK-NEXT:    mov z0.d, p1/m, z1.d
; CHECK-NEXT:    ret
  %xor = xor <vscale x 2 x i64> %a, %b
  %eon = xor <vscale x 2 x i64> %xor, splat (i64 -1)
  %sel1 = select <vscale x 2 x i1> %m1, <vscale x 2 x i64> %a, <vscale x 2 x i64> %eon
  %sel2 = select <vscale x 2 x i1> %m2, <vscale x 2 x i64> %b, <vscale x 2 x i64> %sel1
  ret <vscale x 2 x i64> %sel2
}