llvm/test/CodeGen/AArch64/arm64-AdvSIMD-Scalar.ll

; RUN: llc < %s -march=arm64 -aarch64-neon-syntax=apple -aarch64-simd-scalar=true -asm-verbose=false | FileCheck %s
; RUN: llc < %s -march=arm64 -aarch64-neon-syntax=generic -aarch64-simd-scalar=true -asm-verbose=false | FileCheck %s -check-prefix=GENERIC

define <2 x i64> @bar(<2 x i64> %a, <2 x i64> %b) nounwind readnone {
; CHECK-LABEL: bar:
; CHECK: add.2d	v[[REG:[0-9]+]], v0, v1
; CHECK: add	d[[REG3:[0-9]+]], d[[REG]], d1
; CHECK: sub	d[[REG2:[0-9]+]], d[[REG]], d1
; GENERIC-LABEL: bar:
; GENERIC: add	v[[REG:[0-9]+]].2d, v0.2d, v1.2d
; GENERIC: add	d[[REG3:[0-9]+]], d[[REG]], d1
; GENERIC: sub	d[[REG2:[0-9]+]], d[[REG]], d1
  %add = add <2 x i64> %a, %b
  %vgetq_lane = extractelement <2 x i64> %add, i32 0
  %vgetq_lane2 = extractelement <2 x i64> %b, i32 0
  %add3 = add i64 %vgetq_lane, %vgetq_lane2
  %sub = sub i64 %vgetq_lane, %vgetq_lane2
  %vecinit = insertelement <2 x i64> undef, i64 %add3, i32 0
  %vecinit8 = insertelement <2 x i64> %vecinit, i64 %sub, i32 1
  ret <2 x i64> %vecinit8
}

define double @subdd_su64(<2 x i64> %a, <2 x i64> %b) nounwind readnone {
; CHECK-LABEL: subdd_su64:
; CHECK: sub d0, d1, d0
; CHECK-NEXT: ret
; GENERIC-LABEL: subdd_su64:
; GENERIC: sub d0, d1, d0
; GENERIC-NEXT: ret
  %vecext = extractelement <2 x i64> %a, i32 0
  %vecext1 = extractelement <2 x i64> %b, i32 0
  %sub.i = sub nsw i64 %vecext1, %vecext
  %retval = bitcast i64 %sub.i to double
  ret double %retval
}

define double @vaddd_su64(<2 x i64> %a, <2 x i64> %b) nounwind readnone {
; CHECK-LABEL: vaddd_su64:
; CHECK: add d0, d1, d0
; CHECK-NEXT: ret
; GENERIC-LABEL: vaddd_su64:
; GENERIC: add d0, d1, d0
; GENERIC-NEXT: ret
  %vecext = extractelement <2 x i64> %a, i32 0
  %vecext1 = extractelement <2 x i64> %b, i32 0
  %add.i = add nsw i64 %vecext1, %vecext
  %retval = bitcast i64 %add.i to double
  ret double %retval
}

; sub MI doesn't access dsub register.
define double @add_sub_su64(<2 x i64> %a, <2 x i64> %b) nounwind readnone {
; CHECK-LABEL: add_sub_su64:
; CHECK: add d0, d1, d0
; CHECK: sub d0, {{d[0-9]+}}, d0
; CHECK-NEXT: ret
; GENERIC-LABEL: add_sub_su64:
; GENERIC: add d0, d1, d0
; GENERIC: sub d0, {{d[0-9]+}}, d0
; GENERIC-NEXT: ret
  %vecext = extractelement <2 x i64> %a, i32 0
  %vecext1 = extractelement <2 x i64> %b, i32 0
  %add.i = add i64 %vecext1, %vecext
  %sub.i = sub i64 0, %add.i
  %retval = bitcast i64 %sub.i to double
  ret double %retval
}