; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
; RUN: llc -mtriple=aarch64 -verify-machineinstrs %s -o - 2>&1 | FileCheck %s --check-prefixes=CHECK,CHECK-SD
; RUN: llc -mtriple=aarch64 -global-isel -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-GI

; PR23065: SCALAR_TO_VECTOR implies the top elements 1 to N-1 of the N-element vector are undefined.

define <4 x i16> @foo1(<2 x i32> %a) {
; CHECK-SD-LABEL: foo1:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    movi v0.2d, #0000000000000000
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: foo1:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    mov w8, #58712 // =0xe558
; CHECK-GI-NEXT:    mov v1.s[0], w8
; CHECK-GI-NEXT:    zip1 v0.2s, v1.2s, v0.2s
; CHECK-GI-NEXT:    rev32 v0.4h, v0.4h
; CHECK-GI-NEXT:    ret
  %1 = shufflevector <2 x i32> <i32 58712, i32 undef>, <2 x i32> %a, <2 x i32> <i32 0, i32 2>
; Can't optimize the following bitcast to scalar_to_vector.
  %2 = bitcast <2 x i32> %1 to <4 x i16>
  %3 = shufflevector <4 x i16> %2, <4 x i16> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
  ret <4 x i16> %3
}

define <4 x i16> @foo2(<2 x i32> %a) {
; CHECK-SD-LABEL: foo2:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    movi v0.2d, #0000000000000000
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: foo2:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    mov w8, #712 // =0x2c8
; CHECK-GI-NEXT:    mov v1.s[0], w8
; CHECK-GI-NEXT:    zip1 v0.2s, v1.2s, v0.2s
; CHECK-GI-NEXT:    rev32 v0.4h, v0.4h
; CHECK-GI-NEXT:    ret
  %1 = shufflevector <2 x i32> <i32 712, i32 undef>, <2 x i32> %a, <2 x i32> <i32 0, i32 2>
; Can't optimize the following bitcast to scalar_to_vector.
  %2 = bitcast <2 x i32> %1 to <4 x i16>
  %3 = shufflevector <4 x i16> %2, <4 x i16> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
  ret <4 x i16> %3
}

; ===== To and From Scalar Types =====

define i32 @bitcast_v4i8_i32(<4 x i8> %a, <4 x i8> %b){
; CHECK-SD-LABEL: bitcast_v4i8_i32:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    sub sp, sp, #16
; CHECK-SD-NEXT:    .cfi_def_cfa_offset 16
; CHECK-SD-NEXT:    add v0.4h, v0.4h, v1.4h
; CHECK-SD-NEXT:    uzp1 v0.8b, v0.8b, v0.8b
; CHECK-SD-NEXT:    fmov w0, s0
; CHECK-SD-NEXT:    add sp, sp, #16
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v4i8_i32:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v0.4h, v0.4h, v1.4h
; CHECK-GI-NEXT:    uzp1 v0.8b, v0.8b, v0.8b
; CHECK-GI-NEXT:    fmov w0, s0
; CHECK-GI-NEXT:    ret
  %c = add <4 x i8> %a, %b
  %d = bitcast <4 x i8> %c to i32
  ret i32 %d
}

define <4 x i8> @bitcast_i32_v4i8(i32 %a, i32 %b){
; CHECK-SD-LABEL: bitcast_i32_v4i8:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    add w8, w0, w1
; CHECK-SD-NEXT:    fmov s0, w8
; CHECK-SD-NEXT:    zip1 v0.8b, v0.8b, v0.8b
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_i32_v4i8:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add w8, w0, w1
; CHECK-GI-NEXT:    fmov s0, w8
; CHECK-GI-NEXT:    mov b1, v0.b[1]
; CHECK-GI-NEXT:    mov b2, v0.b[2]
; CHECK-GI-NEXT:    fmov w8, s1
; CHECK-GI-NEXT:    mov b1, v0.b[3]
; CHECK-GI-NEXT:    mov v0.h[1], w8
; CHECK-GI-NEXT:    fmov w8, s2
; CHECK-GI-NEXT:    mov v0.h[2], w8
; CHECK-GI-NEXT:    fmov w8, s1
; CHECK-GI-NEXT:    mov v0.h[3], w8
; CHECK-GI-NEXT:    // kill: def $d0 killed $d0 killed $q0
; CHECK-GI-NEXT:    ret
  %c = add i32 %a, %b
  %d = bitcast i32 %c to <4 x i8>
  ret <4 x i8> %d
}

define i32 @bitcast_v2i16_i32(<2 x i16> %a, <2 x i16> %b){
; CHECK-SD-LABEL: bitcast_v2i16_i32:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    sub sp, sp, #16
; CHECK-SD-NEXT:    .cfi_def_cfa_offset 16
; CHECK-SD-NEXT:    add v0.2s, v0.2s, v1.2s
; CHECK-SD-NEXT:    mov s1, v0.s[1]
; CHECK-SD-NEXT:    str h0, [sp, #12]
; CHECK-SD-NEXT:    str h1, [sp, #14]
; CHECK-SD-NEXT:    ldr w0, [sp, #12]
; CHECK-SD-NEXT:    add sp, sp, #16
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v2i16_i32:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v0.2s, v0.2s, v1.2s
; CHECK-GI-NEXT:    uzp1 v0.4h, v0.4h, v0.4h
; CHECK-GI-NEXT:    fmov w0, s0
; CHECK-GI-NEXT:    ret
  %c = add <2 x i16> %a, %b
  %d = bitcast <2 x i16> %c to i32
  ret i32 %d
}

define <2 x i16> @bitcast_i32_v2i16(i32 %a, i32 %b){
; CHECK-SD-LABEL: bitcast_i32_v2i16:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    add w8, w0, w1
; CHECK-SD-NEXT:    fmov s0, w8
; CHECK-SD-NEXT:    zip1 v0.4h, v0.4h, v0.4h
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_i32_v2i16:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add w8, w0, w1
; CHECK-GI-NEXT:    fmov s0, w8
; CHECK-GI-NEXT:    mov h1, v0.h[1]
; CHECK-GI-NEXT:    mov v0.s[0], w8
; CHECK-GI-NEXT:    fmov w8, s1
; CHECK-GI-NEXT:    mov v0.s[1], w8
; CHECK-GI-NEXT:    // kill: def $d0 killed $d0 killed $q0
; CHECK-GI-NEXT:    ret
  %c = add i32 %a, %b
  %d = bitcast i32 %c to <2 x i16>
  ret <2 x i16> %d
}

define i64 @bitcast_v8i8_i64(<8 x i8> %a, <8 x i8> %b){
; CHECK-LABEL: bitcast_v8i8_i64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.8b, v0.8b, v1.8b
; CHECK-NEXT:    fmov x0, d0
; CHECK-NEXT:    ret
  %c = add <8 x i8> %a, %b
  %d = bitcast <8 x i8> %c to i64
  ret i64 %d
}

define <8 x i8> @bitcast_i64_v8i8(i64 %a, i64 %b){
; CHECK-LABEL: bitcast_i64_v8i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add x8, x0, x1
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %c = add i64 %a, %b
  %d = bitcast i64 %c to <8 x i8>
  ret <8 x i8> %d
}

define i64 @bitcast_v4i16_i64(<4 x i16> %a, <4 x i16> %b){
; CHECK-LABEL: bitcast_v4i16_i64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.4h, v0.4h, v1.4h
; CHECK-NEXT:    fmov x0, d0
; CHECK-NEXT:    ret
  %c = add <4 x i16> %a, %b
  %d = bitcast <4 x i16> %c to i64
  ret i64 %d
}

define <4 x i16> @bitcast_i64_v4i16(i64 %a, i64 %b){
; CHECK-LABEL: bitcast_i64_v4i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add x8, x0, x1
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %c = add i64 %a, %b
  %d = bitcast i64 %c to <4 x i16>
  ret <4 x i16> %d
}

define i64 @bitcast_v2i32_i64(<2 x i32> %a, <2 x i32> %b){
; CHECK-LABEL: bitcast_v2i32_i64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.2s, v0.2s, v1.2s
; CHECK-NEXT:    fmov x0, d0
; CHECK-NEXT:    ret
  %c = add <2 x i32> %a, %b
  %d = bitcast <2 x i32> %c to i64
  ret i64 %d
}

define <2 x i32> @bitcast_i64_v2i32(i64 %a, i64 %b){
; CHECK-LABEL: bitcast_i64_v2i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add x8, x0, x1
; CHECK-NEXT:    fmov d0, x8
; CHECK-NEXT:    ret
  %c = add i64 %a, %b
  %d = bitcast i64 %c to <2 x i32>
  ret <2 x i32> %d
}

; ===== Legal Vector Types =====

define <4 x i16> @bitcast_v2i32_v4i16(<2 x i32> %a, <2 x i32> %b){
; CHECK-LABEL: bitcast_v2i32_v4i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.2s, v0.2s, v1.2s
; CHECK-NEXT:    ret
  %c = add <2 x i32> %a, %b
  %d = bitcast <2 x i32> %c to <4 x i16>
  ret <4 x i16> %d
}

define <4 x i32> @bitcast_v2i64_v4i32(<2 x i64> %a, <2 x i64> %b){
; CHECK-LABEL: bitcast_v2i64_v4i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.2d, v0.2d, v1.2d
; CHECK-NEXT:    ret
  %c = add <2 x i64> %a, %b
  %d = bitcast <2 x i64> %c to <4 x i32>
  ret <4 x i32> %d
}

define <8 x i8> @bitcast_v2i32_v8i8(<2 x i32> %a, <2 x i32> %b){
; CHECK-LABEL: bitcast_v2i32_v8i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.2s, v0.2s, v1.2s
; CHECK-NEXT:    ret
  %c = add <2 x i32> %a, %b
  %d = bitcast <2 x i32> %c to <8 x i8>
  ret <8 x i8> %d
}

define <8 x i16> @bitcast_v2i64_v8i16(<2 x i64> %a, <2 x i64> %b){
; CHECK-LABEL: bitcast_v2i64_v8i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.2d, v0.2d, v1.2d
; CHECK-NEXT:    ret
  %c = add <2 x i64> %a, %b
  %d = bitcast <2 x i64> %c to <8 x i16>
  ret <8 x i16> %d
}

define <16 x i8> @bitcast_v2i64_v16i8(<2 x i64> %a, <2 x i64> %b){
; CHECK-LABEL: bitcast_v2i64_v16i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.2d, v0.2d, v1.2d
; CHECK-NEXT:    ret
  %c = add <2 x i64> %a, %b
  %d = bitcast <2 x i64> %c to <16 x i8>
  ret <16 x i8> %d
}

define <2 x i32> @bitcast_v4i16_v2i32(<4 x i16> %a, <4 x i16> %b){
; CHECK-LABEL: bitcast_v4i16_v2i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.4h, v0.4h, v1.4h
; CHECK-NEXT:    ret
  %c = add <4 x i16> %a, %b
  %d = bitcast <4 x i16> %c to <2 x i32>
  ret <2 x i32> %d
}

define <2 x i64> @bitcast_v4i32_v2i64(<4 x i32> %a, <4 x i32> %b){
; CHECK-LABEL: bitcast_v4i32_v2i64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.4s, v0.4s, v1.4s
; CHECK-NEXT:    ret
  %c = add <4 x i32> %a, %b
  %d = bitcast <4 x i32> %c to <2 x i64>
  ret <2 x i64> %d
}

define <8 x i8> @bitcast_v4i16_v8i8(<4 x i16> %a, <4 x i16> %b){
; CHECK-LABEL: bitcast_v4i16_v8i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.4h, v0.4h, v1.4h
; CHECK-NEXT:    ret
  %c = add <4 x i16> %a, %b
  %d = bitcast <4 x i16> %c to <8 x i8>
  ret <8 x i8> %d
}

define <8 x i16> @bitcast_v4i32_v8i16(<4 x i32> %a, <4 x i32> %b){
; CHECK-LABEL: bitcast_v4i32_v8i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.4s, v0.4s, v1.4s
; CHECK-NEXT:    ret
  %c = add <4 x i32> %a, %b
  %d = bitcast <4 x i32> %c to <8 x i16>
  ret <8 x i16> %d
}

define <16 x i8> @bitcast_v4i32_v16i8(<4 x i32> %a, <4 x i32> %b){
; CHECK-LABEL: bitcast_v4i32_v16i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.4s, v0.4s, v1.4s
; CHECK-NEXT:    ret
  %c = add <4 x i32> %a, %b
  %d = bitcast <4 x i32> %c to <16 x i8>
  ret <16 x i8> %d
}

define <2 x i32> @bitcast_v8i8_v2i32(<8 x i8> %a, <8 x i8> %b){
; CHECK-LABEL: bitcast_v8i8_v2i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.8b, v0.8b, v1.8b
; CHECK-NEXT:    ret
  %c = add <8 x i8> %a, %b
  %d = bitcast <8 x i8> %c to <2 x i32>
  ret <2 x i32> %d
}

define <2 x i64> @bitcast_v8i16_v2i64(<8 x i16> %a, <8 x i16> %b){
; CHECK-LABEL: bitcast_v8i16_v2i64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.8h, v0.8h, v1.8h
; CHECK-NEXT:    ret
  %c = add <8 x i16> %a, %b
  %d = bitcast <8 x i16> %c to <2 x i64>
  ret <2 x i64> %d
}

define <4 x i16> @bitcast_v8i8_v4i16(<8 x i8> %a, <8 x i8> %b){
; CHECK-LABEL: bitcast_v8i8_v4i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.8b, v0.8b, v1.8b
; CHECK-NEXT:    ret
  %c = add <8 x i8> %a, %b
  %d = bitcast <8 x i8> %c to <4 x i16>
  ret <4 x i16> %d
}

define <4 x i32> @bitcast_v8i16_v4i32(<8 x i16> %a, <8 x i16> %b){
; CHECK-LABEL: bitcast_v8i16_v4i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.8h, v0.8h, v1.8h
; CHECK-NEXT:    ret
  %c = add <8 x i16> %a, %b
  %d = bitcast <8 x i16> %c to <4 x i32>
  ret <4 x i32> %d
}

define <16 x i8> @bitcast_v8i16_v16i8(<8 x i16> %a, <8 x i16> %b){
; CHECK-LABEL: bitcast_v8i16_v16i8:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.8h, v0.8h, v1.8h
; CHECK-NEXT:    ret
  %c = add <8 x i16> %a, %b
  %d = bitcast <8 x i16> %c to <16 x i8>
  ret <16 x i8> %d
}

define <2 x i64> @bitcast_v16i8_v2i64(<16 x i8> %a, <16 x i8> %b){
; CHECK-LABEL: bitcast_v16i8_v2i64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.16b, v0.16b, v1.16b
; CHECK-NEXT:    ret
  %c = add <16 x i8> %a, %b
  %d = bitcast <16 x i8> %c to <2 x i64>
  ret <2 x i64> %d
}

define <4 x i32> @bitcast_v16i8_v4i32(<16 x i8> %a, <16 x i8> %b){
; CHECK-LABEL: bitcast_v16i8_v4i32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.16b, v0.16b, v1.16b
; CHECK-NEXT:    ret
  %c = add <16 x i8> %a, %b
  %d = bitcast <16 x i8> %c to <4 x i32>
  ret <4 x i32> %d
}

define <8 x i16> @bitcast_v16i8_v8i16(<16 x i8> %a, <16 x i8> %b){
; CHECK-LABEL: bitcast_v16i8_v8i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.16b, v0.16b, v1.16b
; CHECK-NEXT:    ret
  %c = add <16 x i8> %a, %b
  %d = bitcast <16 x i8> %c to <8 x i16>
  ret <8 x i16> %d
}

; ===== Smaller/Larger Width Vectors with Legal Element Sizes =====

define <4 x i8> @bitcast_v2i16_v4i8(<2 x i16> %a, <2 x i16> %b){
; CHECK-SD-LABEL: bitcast_v2i16_v4i8:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    sub sp, sp, #16
; CHECK-SD-NEXT:    .cfi_def_cfa_offset 16
; CHECK-SD-NEXT:    add v0.2s, v0.2s, v1.2s
; CHECK-SD-NEXT:    mov s1, v0.s[1]
; CHECK-SD-NEXT:    str h0, [sp, #12]
; CHECK-SD-NEXT:    str h1, [sp, #14]
; CHECK-SD-NEXT:    ldr s0, [sp, #12]
; CHECK-SD-NEXT:    ushll v0.8h, v0.8b, #0
; CHECK-SD-NEXT:    // kill: def $d0 killed $d0 killed $q0
; CHECK-SD-NEXT:    add sp, sp, #16
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v2i16_v4i8:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v0.2s, v0.2s, v1.2s
; CHECK-GI-NEXT:    uzp1 v0.4h, v0.4h, v0.4h
; CHECK-GI-NEXT:    mov b1, v0.b[1]
; CHECK-GI-NEXT:    mov b2, v0.b[2]
; CHECK-GI-NEXT:    fmov w8, s1
; CHECK-GI-NEXT:    mov b1, v0.b[3]
; CHECK-GI-NEXT:    mov v0.h[1], w8
; CHECK-GI-NEXT:    fmov w8, s2
; CHECK-GI-NEXT:    mov v0.h[2], w8
; CHECK-GI-NEXT:    fmov w8, s1
; CHECK-GI-NEXT:    mov v0.h[3], w8
; CHECK-GI-NEXT:    // kill: def $d0 killed $d0 killed $q0
; CHECK-GI-NEXT:    ret
  %c = add <2 x i16> %a, %b
  %d = bitcast <2 x i16> %c to <4 x i8>
  ret <4 x i8> %d
}

define <2 x i16> @bitcast_v4i8_v2i16(<4 x i8> %a, <4 x i8> %b){
; CHECK-SD-LABEL: bitcast_v4i8_v2i16:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    sub sp, sp, #16
; CHECK-SD-NEXT:    .cfi_def_cfa_offset 16
; CHECK-SD-NEXT:    add v0.4h, v0.4h, v1.4h
; CHECK-SD-NEXT:    add x8, sp, #12
; CHECK-SD-NEXT:    uzp1 v0.8b, v0.8b, v0.8b
; CHECK-SD-NEXT:    str s0, [sp, #12]
; CHECK-SD-NEXT:    ld1 { v0.h }[0], [x8]
; CHECK-SD-NEXT:    orr x8, x8, #0x2
; CHECK-SD-NEXT:    ld1 { v0.h }[2], [x8]
; CHECK-SD-NEXT:    // kill: def $d0 killed $d0 killed $q0
; CHECK-SD-NEXT:    add sp, sp, #16
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v4i8_v2i16:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v0.4h, v0.4h, v1.4h
; CHECK-GI-NEXT:    uzp1 v0.8b, v0.8b, v0.8b
; CHECK-GI-NEXT:    mov h1, v0.h[1]
; CHECK-GI-NEXT:    fmov w8, s0
; CHECK-GI-NEXT:    mov v0.s[0], w8
; CHECK-GI-NEXT:    fmov w8, s1
; CHECK-GI-NEXT:    mov v0.s[1], w8
; CHECK-GI-NEXT:    // kill: def $d0 killed $d0 killed $q0
; CHECK-GI-NEXT:    ret
  %c = add <4 x i8> %a, %b
  %d = bitcast <4 x i8> %c to <2 x i16>
  ret <2 x i16> %d
}

define <8 x i32> @bitcast_v4i64_v8i32(<4 x i64> %a, <4 x i64> %b){
; CHECK-SD-LABEL: bitcast_v4i64_v8i32:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    add v1.2d, v1.2d, v3.2d
; CHECK-SD-NEXT:    add v0.2d, v0.2d, v2.2d
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v4i64_v8i32:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v0.2d, v0.2d, v2.2d
; CHECK-GI-NEXT:    add v1.2d, v1.2d, v3.2d
; CHECK-GI-NEXT:    ret
  %c = add <4 x i64> %a, %b
  %d = bitcast <4 x i64> %c to <8 x i32>
  ret <8 x i32> %d
}

define <16 x i16> @bitcast_v4i64_v16i16(<4 x i64> %a, <4 x i64> %b){
; CHECK-SD-LABEL: bitcast_v4i64_v16i16:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    add v1.2d, v1.2d, v3.2d
; CHECK-SD-NEXT:    add v0.2d, v0.2d, v2.2d
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v4i64_v16i16:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v0.2d, v0.2d, v2.2d
; CHECK-GI-NEXT:    add v1.2d, v1.2d, v3.2d
; CHECK-GI-NEXT:    ret
  %c = add <4 x i64> %a, %b
  %d = bitcast <4 x i64> %c to <16 x i16>
  ret <16 x i16> %d
}

define <4 x i64> @bitcast_v8i32_v4i64(<8 x i32> %a, <8 x i32> %b){
; CHECK-SD-LABEL: bitcast_v8i32_v4i64:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    add v1.4s, v1.4s, v3.4s
; CHECK-SD-NEXT:    add v0.4s, v0.4s, v2.4s
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v8i32_v4i64:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v2.4s, v0.4s, v2.4s
; CHECK-GI-NEXT:    add v3.4s, v1.4s, v3.4s
; CHECK-GI-NEXT:    mov x8, v2.d[1]
; CHECK-GI-NEXT:    mov x9, v3.d[1]
; CHECK-GI-NEXT:    mov v0.d[0], v2.d[0]
; CHECK-GI-NEXT:    mov v1.d[0], v3.d[0]
; CHECK-GI-NEXT:    mov v0.d[1], x8
; CHECK-GI-NEXT:    mov v1.d[1], x9
; CHECK-GI-NEXT:    ret
  %c = add <8 x i32> %a, %b
  %d = bitcast <8 x i32> %c to <4 x i64>
  ret <4 x i64> %d
}

define <16 x i16> @bitcast_v8i32_v16i16(<8 x i32> %a, <8 x i32> %b){
; CHECK-SD-LABEL: bitcast_v8i32_v16i16:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    add v1.4s, v1.4s, v3.4s
; CHECK-SD-NEXT:    add v0.4s, v0.4s, v2.4s
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v8i32_v16i16:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v0.4s, v0.4s, v2.4s
; CHECK-GI-NEXT:    add v1.4s, v1.4s, v3.4s
; CHECK-GI-NEXT:    ret
  %c = add <8 x i32> %a, %b
  %d = bitcast <8 x i32> %c to <16 x i16>
  ret <16 x i16> %d
}

define <16 x i32> @bitcast_v8i64_v16i32(<8 x i64> %a, <8 x i64> %b){
; CHECK-SD-LABEL: bitcast_v8i64_v16i32:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    add v2.2d, v2.2d, v6.2d
; CHECK-SD-NEXT:    add v0.2d, v0.2d, v4.2d
; CHECK-SD-NEXT:    add v1.2d, v1.2d, v5.2d
; CHECK-SD-NEXT:    add v3.2d, v3.2d, v7.2d
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v8i64_v16i32:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v0.2d, v0.2d, v4.2d
; CHECK-GI-NEXT:    add v1.2d, v1.2d, v5.2d
; CHECK-GI-NEXT:    add v2.2d, v2.2d, v6.2d
; CHECK-GI-NEXT:    add v3.2d, v3.2d, v7.2d
; CHECK-GI-NEXT:    ret
  %c = add <8 x i64> %a, %b
  %d = bitcast <8 x i64> %c to <16 x i32>
  ret <16 x i32> %d
}

define <4 x i64> @bitcast_v16i16_v4i64(<16 x i16> %a, <16 x i16> %b){
; CHECK-SD-LABEL: bitcast_v16i16_v4i64:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    add v1.8h, v1.8h, v3.8h
; CHECK-SD-NEXT:    add v0.8h, v0.8h, v2.8h
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v16i16_v4i64:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v2.8h, v0.8h, v2.8h
; CHECK-GI-NEXT:    add v3.8h, v1.8h, v3.8h
; CHECK-GI-NEXT:    mov x8, v2.d[1]
; CHECK-GI-NEXT:    mov x9, v3.d[1]
; CHECK-GI-NEXT:    mov v0.d[0], v2.d[0]
; CHECK-GI-NEXT:    mov v1.d[0], v3.d[0]
; CHECK-GI-NEXT:    mov v0.d[1], x8
; CHECK-GI-NEXT:    mov v1.d[1], x9
; CHECK-GI-NEXT:    ret
  %c = add <16 x i16> %a, %b
  %d = bitcast <16 x i16> %c to <4 x i64>
  ret <4 x i64> %d
}

define <8 x i32> @bitcast_v16i16_v8i32(<16 x i16> %a, <16 x i16> %b){
; CHECK-SD-LABEL: bitcast_v16i16_v8i32:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    add v1.8h, v1.8h, v3.8h
; CHECK-SD-NEXT:    add v0.8h, v0.8h, v2.8h
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v16i16_v8i32:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v0.8h, v0.8h, v2.8h
; CHECK-GI-NEXT:    add v1.8h, v1.8h, v3.8h
; CHECK-GI-NEXT:    ret
  %c = add <16 x i16> %a, %b
  %d = bitcast <16 x i16> %c to <8 x i32>
  ret <8 x i32> %d
}

define <8 x i64> @bitcast_v16i32_v8i64(<16 x i32> %a, <16 x i32> %b){
; CHECK-SD-LABEL: bitcast_v16i32_v8i64:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    add v2.4s, v2.4s, v6.4s
; CHECK-SD-NEXT:    add v0.4s, v0.4s, v4.4s
; CHECK-SD-NEXT:    add v1.4s, v1.4s, v5.4s
; CHECK-SD-NEXT:    add v3.4s, v3.4s, v7.4s
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: bitcast_v16i32_v8i64:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    add v4.4s, v0.4s, v4.4s
; CHECK-GI-NEXT:    add v5.4s, v1.4s, v5.4s
; CHECK-GI-NEXT:    add v6.4s, v2.4s, v6.4s
; CHECK-GI-NEXT:    add v7.4s, v3.4s, v7.4s
; CHECK-GI-NEXT:    mov x8, v4.d[1]
; CHECK-GI-NEXT:    mov x9, v5.d[1]
; CHECK-GI-NEXT:    mov x10, v6.d[1]
; CHECK-GI-NEXT:    mov x11, v7.d[1]
; CHECK-GI-NEXT:    mov v0.d[0], v4.d[0]
; CHECK-GI-NEXT:    mov v1.d[0], v5.d[0]
; CHECK-GI-NEXT:    mov v2.d[0], v6.d[0]
; CHECK-GI-NEXT:    mov v3.d[0], v7.d[0]
; CHECK-GI-NEXT:    mov v0.d[1], x8
; CHECK-GI-NEXT:    mov v1.d[1], x9
; CHECK-GI-NEXT:    mov v2.d[1], x10
; CHECK-GI-NEXT:    mov v3.d[1], x11
; CHECK-GI-NEXT:    ret
  %c = add <16 x i32> %a, %b
  %d = bitcast <16 x i32> %c to <8 x i64>
  ret <8 x i64> %d
}

; ===== Vectors with Non-Pow 2 Widths =====

define <6 x i16> @bitcast_v3i32_v6i16(<3 x i32> %a, <3 x i32> %b){
; CHECK-LABEL: bitcast_v3i32_v6i16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    add v0.4s, v0.4s, v1.4s
; CHECK-NEXT:    ret
  %c = add <3 x i32> %a, %b
  %d = bitcast <3 x i32> %c to <6 x i16>
  ret <6 x i16> %d
}