; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=aarch64 -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-SD,CHECK-SD-NOFP16
; RUN: llc -mtriple=aarch64 -mattr=+fullfp16 -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-SD,CHECK-SD-FP16
; RUN: llc -mtriple=aarch64 -global-isel -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-GI,CHECK-GI-NOFP16
; RUN: llc -mtriple=aarch64 -mattr=+fullfp16 -global-isel -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-GI,CHECK-GI-FP16

define float @add_HalfS(<2 x float> %bin.rdx)  {
; CHECK-LABEL: add_HalfS:
; CHECK:       // %bb.0:
; CHECK-NEXT:    faddp s0, v0.2s
; CHECK-NEXT:    ret
  %r = call fast float @llvm.vector.reduce.fadd.f32.v2f32(float -0.0, <2 x float> %bin.rdx)
  ret float %r
}

define half @add_v2HalfH(<2 x half> %bin.rdx)  {
; CHECK-SD-NOFP16-LABEL: add_v2HalfH:
; CHECK-SD-NOFP16:       // %bb.0:
; CHECK-SD-NOFP16-NEXT:    // kill: def $d0 killed $d0 def $q0
; CHECK-SD-NOFP16-NEXT:    mov h1, v0.h[1]
; CHECK-SD-NOFP16-NEXT:    fcvt s0, h0
; CHECK-SD-NOFP16-NEXT:    fcvt s1, h1
; CHECK-SD-NOFP16-NEXT:    fadd s0, s0, s1
; CHECK-SD-NOFP16-NEXT:    fcvt h0, s0
; CHECK-SD-NOFP16-NEXT:    ret
;
; CHECK-SD-FP16-LABEL: add_v2HalfH:
; CHECK-SD-FP16:       // %bb.0:
; CHECK-SD-FP16-NEXT:    // kill: def $d0 killed $d0 def $q0
; CHECK-SD-FP16-NEXT:    faddp h0, v0.2h
; CHECK-SD-FP16-NEXT:    ret
;
; CHECK-GI-NOFP16-LABEL: add_v2HalfH:
; CHECK-GI-NOFP16:       // %bb.0:
; CHECK-GI-NOFP16-NEXT:    fcvtl v0.4s, v0.4h
; CHECK-GI-NOFP16-NEXT:    faddp s0, v0.2s
; CHECK-GI-NOFP16-NEXT:    fcvt h0, s0
; CHECK-GI-NOFP16-NEXT:    ret
;
; CHECK-GI-FP16-LABEL: add_v2HalfH:
; CHECK-GI-FP16:       // %bb.0:
; CHECK-GI-FP16-NEXT:    // kill: def $d0 killed $d0 def $q0
; CHECK-GI-FP16-NEXT:    mov h1, v0.h[1]
; CHECK-GI-FP16-NEXT:    fadd h0, h0, h1
; CHECK-GI-FP16-NEXT:    ret
  %r = call fast half @llvm.vector.reduce.fadd.f16.v2f16(half -0.0, <2 x half> %bin.rdx)
  ret half %r
}

define half @add_v3HalfH(<3 x half> %bin.rdx)  {
; CHECK-SD-NOFP16-LABEL: add_v3HalfH:
; CHECK-SD-NOFP16:       // %bb.0:
; CHECK-SD-NOFP16-NEXT:    // kill: def $d0 killed $d0 def $q0
; CHECK-SD-NOFP16-NEXT:    mov h1, v0.h[1]
; CHECK-SD-NOFP16-NEXT:    fcvt s2, h0
; CHECK-SD-NOFP16-NEXT:    mov h0, v0.h[2]
; CHECK-SD-NOFP16-NEXT:    fcvt s1, h1
; CHECK-SD-NOFP16-NEXT:    fcvt s0, h0
; CHECK-SD-NOFP16-NEXT:    fadd s1, s2, s1
; CHECK-SD-NOFP16-NEXT:    fadd s0, s1, s0
; CHECK-SD-NOFP16-NEXT:    fcvt h0, s0
; CHECK-SD-NOFP16-NEXT:    ret
;
; CHECK-SD-FP16-LABEL: add_v3HalfH:
; CHECK-SD-FP16:       // %bb.0:
; CHECK-SD-FP16-NEXT:    movi d1, #0000000000000000
; CHECK-SD-FP16-NEXT:    // kill: def $d0 killed $d0 def $q0
; CHECK-SD-FP16-NEXT:    mov v0.h[3], v1.h[0]
; CHECK-SD-FP16-NEXT:    faddp v0.4h, v0.4h, v0.4h
; CHECK-SD-FP16-NEXT:    faddp h0, v0.2h
; CHECK-SD-FP16-NEXT:    ret
;
; CHECK-GI-NOFP16-LABEL: add_v3HalfH:
; CHECK-GI-NOFP16:       // %bb.0:
; CHECK-GI-NOFP16-NEXT:    movi v1.2s, #128, lsl #24
; CHECK-GI-NOFP16-NEXT:    fcvtl v0.4s, v0.4h
; CHECK-GI-NOFP16-NEXT:    mov v0.s[3], v1.s[0]
; CHECK-GI-NOFP16-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-GI-NOFP16-NEXT:    faddp s0, v0.2s
; CHECK-GI-NOFP16-NEXT:    fcvt h0, s0
; CHECK-GI-NOFP16-NEXT:    ret
;
; CHECK-GI-FP16-LABEL: add_v3HalfH:
; CHECK-GI-FP16:       // %bb.0:
; CHECK-GI-FP16-NEXT:    adrp x8, .LCPI2_0
; CHECK-GI-FP16-NEXT:    // kill: def $d0 killed $d0 def $q0
; CHECK-GI-FP16-NEXT:    ldr h1, [x8, :lo12:.LCPI2_0]
; CHECK-GI-FP16-NEXT:    mov v0.h[3], v1.h[0]
; CHECK-GI-FP16-NEXT:    faddp v0.4h, v0.4h, v0.4h
; CHECK-GI-FP16-NEXT:    faddp h0, v0.2h
; CHECK-GI-FP16-NEXT:    ret
  %r = call fast half @llvm.vector.reduce.fadd.f16.v3f16(half -0.0, <3 x half> %bin.rdx)
  ret half %r
}

define half @add_HalfH(<4 x half> %bin.rdx)  {
; CHECK-SD-NOFP16-LABEL: add_HalfH:
; CHECK-SD-NOFP16:       // %bb.0:
; CHECK-SD-NOFP16-NEXT:    // kill: def $d0 killed $d0 def $q0
; CHECK-SD-NOFP16-NEXT:    mov h1, v0.h[1]
; CHECK-SD-NOFP16-NEXT:    mov h2, v0.h[3]
; CHECK-SD-NOFP16-NEXT:    mov h3, v0.h[2]
; CHECK-SD-NOFP16-NEXT:    fcvt s0, h0
; CHECK-SD-NOFP16-NEXT:    fcvt s1, h1
; CHECK-SD-NOFP16-NEXT:    fcvt s3, h3
; CHECK-SD-NOFP16-NEXT:    fcvt s2, h2
; CHECK-SD-NOFP16-NEXT:    fadd s0, s0, s1
; CHECK-SD-NOFP16-NEXT:    fadd s1, s3, s2
; CHECK-SD-NOFP16-NEXT:    fadd s0, s0, s1
; CHECK-SD-NOFP16-NEXT:    fcvt h0, s0
; CHECK-SD-NOFP16-NEXT:    ret
;
; CHECK-SD-FP16-LABEL: add_HalfH:
; CHECK-SD-FP16:       // %bb.0:
; CHECK-SD-FP16-NEXT:    faddp v0.4h, v0.4h, v0.4h
; CHECK-SD-FP16-NEXT:    faddp h0, v0.2h
; CHECK-SD-FP16-NEXT:    ret
;
; CHECK-GI-NOFP16-LABEL: add_HalfH:
; CHECK-GI-NOFP16:       // %bb.0:
; CHECK-GI-NOFP16-NEXT:    fcvtl v0.4s, v0.4h
; CHECK-GI-NOFP16-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-GI-NOFP16-NEXT:    faddp s0, v0.2s
; CHECK-GI-NOFP16-NEXT:    fcvt h0, s0
; CHECK-GI-NOFP16-NEXT:    ret
;
; CHECK-GI-FP16-LABEL: add_HalfH:
; CHECK-GI-FP16:       // %bb.0:
; CHECK-GI-FP16-NEXT:    faddp v0.4h, v0.4h, v0.4h
; CHECK-GI-FP16-NEXT:    faddp h0, v0.2h
; CHECK-GI-FP16-NEXT:    ret
  %r = call fast half @llvm.vector.reduce.fadd.f16.v4f16(half -0.0, <4 x half> %bin.rdx)
  ret half %r
}


define half @add_H(<8 x half> %bin.rdx)  {
; CHECK-SD-NOFP16-LABEL: add_H:
; CHECK-SD-NOFP16:       // %bb.0:
; CHECK-SD-NOFP16-NEXT:    mov h1, v0.h[2]
; CHECK-SD-NOFP16-NEXT:    mov h2, v0.h[1]
; CHECK-SD-NOFP16-NEXT:    mov h3, v0.h[5]
; CHECK-SD-NOFP16-NEXT:    mov h4, v0.h[4]
; CHECK-SD-NOFP16-NEXT:    mov h5, v0.h[3]
; CHECK-SD-NOFP16-NEXT:    mov h6, v0.h[6]
; CHECK-SD-NOFP16-NEXT:    fcvt s7, h0
; CHECK-SD-NOFP16-NEXT:    mov h0, v0.h[7]
; CHECK-SD-NOFP16-NEXT:    fcvt s2, h2
; CHECK-SD-NOFP16-NEXT:    fcvt s1, h1
; CHECK-SD-NOFP16-NEXT:    fcvt s3, h3
; CHECK-SD-NOFP16-NEXT:    fcvt s5, h5
; CHECK-SD-NOFP16-NEXT:    fcvt s4, h4
; CHECK-SD-NOFP16-NEXT:    fcvt s0, h0
; CHECK-SD-NOFP16-NEXT:    fadd s2, s7, s2
; CHECK-SD-NOFP16-NEXT:    fadd s1, s1, s5
; CHECK-SD-NOFP16-NEXT:    fadd s3, s4, s3
; CHECK-SD-NOFP16-NEXT:    fcvt s4, h6
; CHECK-SD-NOFP16-NEXT:    fadd s1, s2, s1
; CHECK-SD-NOFP16-NEXT:    fadd s2, s3, s4
; CHECK-SD-NOFP16-NEXT:    fadd s1, s1, s2
; CHECK-SD-NOFP16-NEXT:    fadd s0, s1, s0
; CHECK-SD-NOFP16-NEXT:    fcvt h0, s0
; CHECK-SD-NOFP16-NEXT:    ret
;
; CHECK-SD-FP16-LABEL: add_H:
; CHECK-SD-FP16:       // %bb.0:
; CHECK-SD-FP16-NEXT:    faddp v1.8h, v0.8h, v0.8h
; CHECK-SD-FP16-NEXT:    faddp v0.8h, v1.8h, v0.8h
; CHECK-SD-FP16-NEXT:    faddp h0, v0.2h
; CHECK-SD-FP16-NEXT:    ret
;
; CHECK-GI-NOFP16-LABEL: add_H:
; CHECK-GI-NOFP16:       // %bb.0:
; CHECK-GI-NOFP16-NEXT:    fcvtl v1.4s, v0.4h
; CHECK-GI-NOFP16-NEXT:    fcvtl2 v0.4s, v0.8h
; CHECK-GI-NOFP16-NEXT:    fadd v0.4s, v1.4s, v0.4s
; CHECK-GI-NOFP16-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-GI-NOFP16-NEXT:    faddp s0, v0.2s
; CHECK-GI-NOFP16-NEXT:    fcvt h0, s0
; CHECK-GI-NOFP16-NEXT:    ret
;
; CHECK-GI-FP16-LABEL: add_H:
; CHECK-GI-FP16:       // %bb.0:
; CHECK-GI-FP16-NEXT:    faddp v1.8h, v0.8h, v0.8h
; CHECK-GI-FP16-NEXT:    faddp v0.8h, v1.8h, v0.8h
; CHECK-GI-FP16-NEXT:    faddp h0, v0.2h
; CHECK-GI-FP16-NEXT:    ret
  %r = call fast half @llvm.vector.reduce.fadd.f16.v8f16(half -0.0, <8 x half> %bin.rdx)
  ret half %r
}

define float @add_S(<4 x float> %bin.rdx)  {
; CHECK-LABEL: add_S:
; CHECK:       // %bb.0:
; CHECK-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-NEXT:    faddp s0, v0.2s
; CHECK-NEXT:    ret
  %r = call fast float @llvm.vector.reduce.fadd.f32.v4f32(float -0.0, <4 x float> %bin.rdx)
  ret float %r
}

define double @add_D(<2 x double> %bin.rdx)  {
; CHECK-LABEL: add_D:
; CHECK:       // %bb.0:
; CHECK-NEXT:    faddp d0, v0.2d
; CHECK-NEXT:    ret
  %r = call fast double @llvm.vector.reduce.fadd.f64.v2f64(double -0.0, <2 x double> %bin.rdx)
  ret double %r
}

define half @add_2H(<16 x half> %bin.rdx)  {
; CHECK-SD-NOFP16-LABEL: add_2H:
; CHECK-SD-NOFP16:       // %bb.0:
; CHECK-SD-NOFP16-NEXT:    fcvtl v2.4s, v1.4h
; CHECK-SD-NOFP16-NEXT:    fcvtl v3.4s, v0.4h
; CHECK-SD-NOFP16-NEXT:    fcvtl2 v1.4s, v1.8h
; CHECK-SD-NOFP16-NEXT:    fcvtl2 v0.4s, v0.8h
; CHECK-SD-NOFP16-NEXT:    fadd v2.4s, v3.4s, v2.4s
; CHECK-SD-NOFP16-NEXT:    fadd v0.4s, v0.4s, v1.4s
; CHECK-SD-NOFP16-NEXT:    fcvtn v1.4h, v2.4s
; CHECK-SD-NOFP16-NEXT:    fcvtn2 v1.8h, v0.4s
; CHECK-SD-NOFP16-NEXT:    mov h0, v1.h[1]
; CHECK-SD-NOFP16-NEXT:    mov h2, v1.h[2]
; CHECK-SD-NOFP16-NEXT:    mov h3, v1.h[3]
; CHECK-SD-NOFP16-NEXT:    mov h4, v1.h[4]
; CHECK-SD-NOFP16-NEXT:    mov h5, v1.h[5]
; CHECK-SD-NOFP16-NEXT:    fcvt s6, h1
; CHECK-SD-NOFP16-NEXT:    mov h7, v1.h[6]
; CHECK-SD-NOFP16-NEXT:    mov h1, v1.h[7]
; CHECK-SD-NOFP16-NEXT:    fcvt s0, h0
; CHECK-SD-NOFP16-NEXT:    fcvt s2, h2
; CHECK-SD-NOFP16-NEXT:    fcvt s3, h3
; CHECK-SD-NOFP16-NEXT:    fcvt s4, h4
; CHECK-SD-NOFP16-NEXT:    fcvt s5, h5
; CHECK-SD-NOFP16-NEXT:    fcvt s1, h1
; CHECK-SD-NOFP16-NEXT:    fadd s0, s6, s0
; CHECK-SD-NOFP16-NEXT:    fadd s2, s2, s3
; CHECK-SD-NOFP16-NEXT:    fadd s3, s4, s5
; CHECK-SD-NOFP16-NEXT:    fcvt s4, h7
; CHECK-SD-NOFP16-NEXT:    fadd s0, s0, s2
; CHECK-SD-NOFP16-NEXT:    fadd s2, s3, s4
; CHECK-SD-NOFP16-NEXT:    fadd s0, s0, s2
; CHECK-SD-NOFP16-NEXT:    fadd s0, s0, s1
; CHECK-SD-NOFP16-NEXT:    fcvt h0, s0
; CHECK-SD-NOFP16-NEXT:    ret
;
; CHECK-SD-FP16-LABEL: add_2H:
; CHECK-SD-FP16:       // %bb.0:
; CHECK-SD-FP16-NEXT:    fadd v0.8h, v0.8h, v1.8h
; CHECK-SD-FP16-NEXT:    faddp v1.8h, v0.8h, v0.8h
; CHECK-SD-FP16-NEXT:    faddp v0.8h, v1.8h, v0.8h
; CHECK-SD-FP16-NEXT:    faddp h0, v0.2h
; CHECK-SD-FP16-NEXT:    ret
;
; CHECK-GI-NOFP16-LABEL: add_2H:
; CHECK-GI-NOFP16:       // %bb.0:
; CHECK-GI-NOFP16-NEXT:    fcvtl v2.4s, v0.4h
; CHECK-GI-NOFP16-NEXT:    fcvtl2 v0.4s, v0.8h
; CHECK-GI-NOFP16-NEXT:    fcvtl v3.4s, v1.4h
; CHECK-GI-NOFP16-NEXT:    fcvtl2 v1.4s, v1.8h
; CHECK-GI-NOFP16-NEXT:    fadd v0.4s, v2.4s, v0.4s
; CHECK-GI-NOFP16-NEXT:    fadd v1.4s, v3.4s, v1.4s
; CHECK-GI-NOFP16-NEXT:    fadd v0.4s, v0.4s, v1.4s
; CHECK-GI-NOFP16-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-GI-NOFP16-NEXT:    faddp s0, v0.2s
; CHECK-GI-NOFP16-NEXT:    fcvt h0, s0
; CHECK-GI-NOFP16-NEXT:    ret
;
; CHECK-GI-FP16-LABEL: add_2H:
; CHECK-GI-FP16:       // %bb.0:
; CHECK-GI-FP16-NEXT:    fadd v0.8h, v0.8h, v1.8h
; CHECK-GI-FP16-NEXT:    faddp v1.8h, v0.8h, v0.8h
; CHECK-GI-FP16-NEXT:    faddp v0.8h, v1.8h, v0.8h
; CHECK-GI-FP16-NEXT:    faddp h0, v0.2h
; CHECK-GI-FP16-NEXT:    ret
  %r = call fast half @llvm.vector.reduce.fadd.f16.v16f16(half -0.0, <16 x half> %bin.rdx)
  ret half %r
}

define float @add_2S(<8 x float> %bin.rdx)  {
; CHECK-LABEL: add_2S:
; CHECK:       // %bb.0:
; CHECK-NEXT:    fadd v0.4s, v0.4s, v1.4s
; CHECK-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-NEXT:    faddp s0, v0.2s
; CHECK-NEXT:    ret
  %r = call fast float @llvm.vector.reduce.fadd.f32.v8f32(float -0.0, <8 x float> %bin.rdx)
  ret float %r
}

define double @add_2D(<4 x double> %bin.rdx)  {
; CHECK-LABEL: add_2D:
; CHECK:       // %bb.0:
; CHECK-NEXT:    fadd v0.2d, v0.2d, v1.2d
; CHECK-NEXT:    faddp d0, v0.2d
; CHECK-NEXT:    ret
  %r = call fast double @llvm.vector.reduce.fadd.f64.v4f64(double -0.0, <4 x double> %bin.rdx)
  ret double %r
}

; Added at least one test where the start value is not -0.0.
define float @add_S_init_42(<4 x float> %bin.rdx)  {
; CHECK-LABEL: add_S_init_42:
; CHECK:       // %bb.0:
; CHECK-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-NEXT:    mov w8, #1109917696 // =0x42280000
; CHECK-NEXT:    fmov s1, w8
; CHECK-NEXT:    faddp s0, v0.2s
; CHECK-NEXT:    fadd s0, s0, s1
; CHECK-NEXT:    ret
  %r = call fast float @llvm.vector.reduce.fadd.f32.v4f32(float 42.0, <4 x float> %bin.rdx)
  ret float %r
}

; The faddp.4s in the loop should not use v0.4s as second operand,
; because this introduces an unnecessary cross-iteration dependency.
define float @fadd_reduction_v4f32_in_loop(ptr %ptr.start) {
; CHECK-LABEL: fadd_reduction_v4f32_in_loop:
; CHECK:       // %bb.0: // %entry
; CHECK-NEXT:    movi d0, #0000000000000000
; CHECK-NEXT:    mov x8, xzr
; CHECK-NEXT:  .LBB11_1: // %loop
; CHECK-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-NEXT:    ldr q1, [x0, x8]
; CHECK-NEXT:    add x8, x8, #16
; CHECK-NEXT:    cmp w8, #112
; CHECK-NEXT:    faddp v1.4s, v1.4s, v1.4s
; CHECK-NEXT:    faddp s1, v1.2s
; CHECK-NEXT:    fadd s0, s1, s0
; CHECK-NEXT:    b.ne .LBB11_1
; CHECK-NEXT:  // %bb.2: // %exit
; CHECK-NEXT:    ret
entry:
  br label %loop

loop:
  %iv = phi i32 [ 1, %entry ], [ %iv.next, %loop ]
  %ptr = phi ptr [ %ptr.start, %entry ], [ %ptr.next, %loop ]
  %red = phi float [ 0.000000e+00, %entry ], [ %red.next, %loop ]
  %lv = load <4 x float>, ptr %ptr, align 4
  %r = call fast float @llvm.vector.reduce.fadd.f32.v4f32(float -0.0, <4 x float> %lv)
  %red.next = fadd fast float %r, %red
  %ec = icmp eq i32 %iv, 7
  %ptr.next = getelementptr inbounds float, ptr %ptr, i64 4
  %iv.next= add nuw nsw i32 %iv, 1
  br i1 %ec, label %exit, label %loop

exit:
  ret float %red.next
}

; The faddp.4h in the loop should not use v0.4h as second operand,
; because this introduces an unnecessary cross-iteration dependency.
define half @fadd_reduction_v4f16_in_loop(ptr %ptr.start) {
; CHECK-SD-NOFP16-LABEL: fadd_reduction_v4f16_in_loop:
; CHECK-SD-NOFP16:       // %bb.0: // %entry
; CHECK-SD-NOFP16-NEXT:    movi d0, #0000000000000000
; CHECK-SD-NOFP16-NEXT:    mov x8, xzr
; CHECK-SD-NOFP16-NEXT:  .LBB12_1: // %loop
; CHECK-SD-NOFP16-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-SD-NOFP16-NEXT:    ldr d1, [x0, x8]
; CHECK-SD-NOFP16-NEXT:    fcvt s0, h0
; CHECK-SD-NOFP16-NEXT:    add x8, x8, #8
; CHECK-SD-NOFP16-NEXT:    cmp w8, #56
; CHECK-SD-NOFP16-NEXT:    mov h2, v1.h[1]
; CHECK-SD-NOFP16-NEXT:    mov h3, v1.h[3]
; CHECK-SD-NOFP16-NEXT:    mov h4, v1.h[2]
; CHECK-SD-NOFP16-NEXT:    fcvt s1, h1
; CHECK-SD-NOFP16-NEXT:    fcvt s2, h2
; CHECK-SD-NOFP16-NEXT:    fcvt s4, h4
; CHECK-SD-NOFP16-NEXT:    fcvt s3, h3
; CHECK-SD-NOFP16-NEXT:    fadd s1, s1, s2
; CHECK-SD-NOFP16-NEXT:    fadd s2, s4, s3
; CHECK-SD-NOFP16-NEXT:    fadd s1, s1, s2
; CHECK-SD-NOFP16-NEXT:    fadd s0, s1, s0
; CHECK-SD-NOFP16-NEXT:    fcvt h0, s0
; CHECK-SD-NOFP16-NEXT:    b.ne .LBB12_1
; CHECK-SD-NOFP16-NEXT:  // %bb.2: // %exit
; CHECK-SD-NOFP16-NEXT:    ret
;
; CHECK-SD-FP16-LABEL: fadd_reduction_v4f16_in_loop:
; CHECK-SD-FP16:       // %bb.0: // %entry
; CHECK-SD-FP16-NEXT:    movi d0, #0000000000000000
; CHECK-SD-FP16-NEXT:    mov x8, xzr
; CHECK-SD-FP16-NEXT:  .LBB12_1: // %loop
; CHECK-SD-FP16-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-SD-FP16-NEXT:    ldr d1, [x0, x8]
; CHECK-SD-FP16-NEXT:    add x8, x8, #8
; CHECK-SD-FP16-NEXT:    cmp w8, #56
; CHECK-SD-FP16-NEXT:    faddp v1.4h, v1.4h, v1.4h
; CHECK-SD-FP16-NEXT:    faddp h1, v1.2h
; CHECK-SD-FP16-NEXT:    fadd h0, h1, h0
; CHECK-SD-FP16-NEXT:    b.ne .LBB12_1
; CHECK-SD-FP16-NEXT:  // %bb.2: // %exit
; CHECK-SD-FP16-NEXT:    ret
;
; CHECK-GI-NOFP16-LABEL: fadd_reduction_v4f16_in_loop:
; CHECK-GI-NOFP16:       // %bb.0: // %entry
; CHECK-GI-NOFP16-NEXT:    mov x8, xzr
; CHECK-GI-NOFP16-NEXT:    mov w9, #0 // =0x0
; CHECK-GI-NOFP16-NEXT:  .LBB12_1: // %loop
; CHECK-GI-NOFP16-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-GI-NOFP16-NEXT:    ldr d0, [x0, x8]
; CHECK-GI-NOFP16-NEXT:    fmov s1, w9
; CHECK-GI-NOFP16-NEXT:    add x8, x8, #8
; CHECK-GI-NOFP16-NEXT:    cmp w8, #56
; CHECK-GI-NOFP16-NEXT:    fcvtl v0.4s, v0.4h
; CHECK-GI-NOFP16-NEXT:    fcvt s1, h1
; CHECK-GI-NOFP16-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-GI-NOFP16-NEXT:    faddp s0, v0.2s
; CHECK-GI-NOFP16-NEXT:    fcvt h0, s0
; CHECK-GI-NOFP16-NEXT:    fcvt s0, h0
; CHECK-GI-NOFP16-NEXT:    fadd s0, s0, s1
; CHECK-GI-NOFP16-NEXT:    fcvt h0, s0
; CHECK-GI-NOFP16-NEXT:    fmov w9, s0
; CHECK-GI-NOFP16-NEXT:    b.ne .LBB12_1
; CHECK-GI-NOFP16-NEXT:  // %bb.2: // %exit
; CHECK-GI-NOFP16-NEXT:    // kill: def $h0 killed $h0 killed $s0
; CHECK-GI-NOFP16-NEXT:    ret
;
; CHECK-GI-FP16-LABEL: fadd_reduction_v4f16_in_loop:
; CHECK-GI-FP16:       // %bb.0: // %entry
; CHECK-GI-FP16-NEXT:    movi d0, #0000000000000000
; CHECK-GI-FP16-NEXT:    mov x8, xzr
; CHECK-GI-FP16-NEXT:  .LBB12_1: // %loop
; CHECK-GI-FP16-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-GI-FP16-NEXT:    ldr d1, [x0, x8]
; CHECK-GI-FP16-NEXT:    add x8, x8, #8
; CHECK-GI-FP16-NEXT:    cmp w8, #56
; CHECK-GI-FP16-NEXT:    faddp v1.4h, v1.4h, v1.4h
; CHECK-GI-FP16-NEXT:    faddp h1, v1.2h
; CHECK-GI-FP16-NEXT:    fadd h0, h1, h0
; CHECK-GI-FP16-NEXT:    b.ne .LBB12_1
; CHECK-GI-FP16-NEXT:  // %bb.2: // %exit
; CHECK-GI-FP16-NEXT:    ret
entry:
  br label %loop

loop:
  %iv = phi i32 [ 1, %entry ], [ %iv.next, %loop ]
  %ptr = phi ptr [ %ptr.start, %entry ], [ %ptr.next, %loop ]
  %red = phi half [ 0.000000e+00, %entry ], [ %red.next, %loop ]
  %lv = load <4 x half>, ptr %ptr, align 4
  %r = call fast half @llvm.vector.reduce.fadd.f16.v4f16(half -0.0, <4 x half> %lv)
  %red.next = fadd fast half %r, %red
  %ec = icmp eq i32 %iv, 7
  %ptr.next = getelementptr inbounds half, ptr %ptr, i64 4
  %iv.next= add nuw nsw i32 %iv, 1
  br i1 %ec, label %exit, label %loop

exit:
  ret half %red.next
}

; The faddp.8h in the loop should not use v0.8h as second operand,
; because this introduces an unnecessary cross-iteration dependency.
define half @fadd_reduction_v8f16_in_loop(ptr %ptr.start) {
; CHECK-SD-NOFP16-LABEL: fadd_reduction_v8f16_in_loop:
; CHECK-SD-NOFP16:       // %bb.0: // %entry
; CHECK-SD-NOFP16-NEXT:    movi d0, #0000000000000000
; CHECK-SD-NOFP16-NEXT:    mov x8, xzr
; CHECK-SD-NOFP16-NEXT:  .LBB13_1: // %loop
; CHECK-SD-NOFP16-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-SD-NOFP16-NEXT:    ldr q1, [x0, x8]
; CHECK-SD-NOFP16-NEXT:    fcvt s0, h0
; CHECK-SD-NOFP16-NEXT:    add x8, x8, #8
; CHECK-SD-NOFP16-NEXT:    cmp w8, #56
; CHECK-SD-NOFP16-NEXT:    mov h2, v1.h[3]
; CHECK-SD-NOFP16-NEXT:    mov h3, v1.h[2]
; CHECK-SD-NOFP16-NEXT:    mov h4, v1.h[1]
; CHECK-SD-NOFP16-NEXT:    mov h5, v1.h[5]
; CHECK-SD-NOFP16-NEXT:    mov h6, v1.h[4]
; CHECK-SD-NOFP16-NEXT:    fcvt s7, h1
; CHECK-SD-NOFP16-NEXT:    mov h16, v1.h[6]
; CHECK-SD-NOFP16-NEXT:    mov h1, v1.h[7]
; CHECK-SD-NOFP16-NEXT:    fcvt s4, h4
; CHECK-SD-NOFP16-NEXT:    fcvt s3, h3
; CHECK-SD-NOFP16-NEXT:    fcvt s2, h2
; CHECK-SD-NOFP16-NEXT:    fcvt s6, h6
; CHECK-SD-NOFP16-NEXT:    fcvt s5, h5
; CHECK-SD-NOFP16-NEXT:    fcvt s1, h1
; CHECK-SD-NOFP16-NEXT:    fadd s4, s7, s4
; CHECK-SD-NOFP16-NEXT:    fadd s2, s3, s2
; CHECK-SD-NOFP16-NEXT:    fcvt s3, h16
; CHECK-SD-NOFP16-NEXT:    fadd s5, s6, s5
; CHECK-SD-NOFP16-NEXT:    fadd s0, s1, s0
; CHECK-SD-NOFP16-NEXT:    fadd s2, s4, s2
; CHECK-SD-NOFP16-NEXT:    fadd s3, s5, s3
; CHECK-SD-NOFP16-NEXT:    fadd s2, s2, s3
; CHECK-SD-NOFP16-NEXT:    fadd s0, s2, s0
; CHECK-SD-NOFP16-NEXT:    fcvt h0, s0
; CHECK-SD-NOFP16-NEXT:    b.ne .LBB13_1
; CHECK-SD-NOFP16-NEXT:  // %bb.2: // %exit
; CHECK-SD-NOFP16-NEXT:    ret
;
; CHECK-SD-FP16-LABEL: fadd_reduction_v8f16_in_loop:
; CHECK-SD-FP16:       // %bb.0: // %entry
; CHECK-SD-FP16-NEXT:    movi d0, #0000000000000000
; CHECK-SD-FP16-NEXT:    mov x8, xzr
; CHECK-SD-FP16-NEXT:  .LBB13_1: // %loop
; CHECK-SD-FP16-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-SD-FP16-NEXT:    ldr q1, [x0, x8]
; CHECK-SD-FP16-NEXT:    add x8, x8, #8
; CHECK-SD-FP16-NEXT:    cmp w8, #56
; CHECK-SD-FP16-NEXT:    faddp v2.8h, v1.8h, v1.8h
; CHECK-SD-FP16-NEXT:    faddp v1.8h, v2.8h, v1.8h
; CHECK-SD-FP16-NEXT:    faddp h1, v1.2h
; CHECK-SD-FP16-NEXT:    fadd h0, h1, h0
; CHECK-SD-FP16-NEXT:    b.ne .LBB13_1
; CHECK-SD-FP16-NEXT:  // %bb.2: // %exit
; CHECK-SD-FP16-NEXT:    ret
;
; CHECK-GI-NOFP16-LABEL: fadd_reduction_v8f16_in_loop:
; CHECK-GI-NOFP16:       // %bb.0: // %entry
; CHECK-GI-NOFP16-NEXT:    mov x8, xzr
; CHECK-GI-NOFP16-NEXT:    mov w9, #0 // =0x0
; CHECK-GI-NOFP16-NEXT:  .LBB13_1: // %loop
; CHECK-GI-NOFP16-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-GI-NOFP16-NEXT:    ldr q0, [x0, x8]
; CHECK-GI-NOFP16-NEXT:    add x8, x8, #8
; CHECK-GI-NOFP16-NEXT:    cmp w8, #56
; CHECK-GI-NOFP16-NEXT:    fcvtl v1.4s, v0.4h
; CHECK-GI-NOFP16-NEXT:    fcvtl2 v0.4s, v0.8h
; CHECK-GI-NOFP16-NEXT:    fadd v0.4s, v1.4s, v0.4s
; CHECK-GI-NOFP16-NEXT:    fmov s1, w9
; CHECK-GI-NOFP16-NEXT:    fcvt s1, h1
; CHECK-GI-NOFP16-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-GI-NOFP16-NEXT:    faddp s0, v0.2s
; CHECK-GI-NOFP16-NEXT:    fcvt h0, s0
; CHECK-GI-NOFP16-NEXT:    fcvt s0, h0
; CHECK-GI-NOFP16-NEXT:    fadd s0, s0, s1
; CHECK-GI-NOFP16-NEXT:    fcvt h0, s0
; CHECK-GI-NOFP16-NEXT:    fmov w9, s0
; CHECK-GI-NOFP16-NEXT:    b.ne .LBB13_1
; CHECK-GI-NOFP16-NEXT:  // %bb.2: // %exit
; CHECK-GI-NOFP16-NEXT:    // kill: def $h0 killed $h0 killed $s0
; CHECK-GI-NOFP16-NEXT:    ret
;
; CHECK-GI-FP16-LABEL: fadd_reduction_v8f16_in_loop:
; CHECK-GI-FP16:       // %bb.0: // %entry
; CHECK-GI-FP16-NEXT:    movi d0, #0000000000000000
; CHECK-GI-FP16-NEXT:    mov x8, xzr
; CHECK-GI-FP16-NEXT:  .LBB13_1: // %loop
; CHECK-GI-FP16-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-GI-FP16-NEXT:    ldr q1, [x0, x8]
; CHECK-GI-FP16-NEXT:    add x8, x8, #8
; CHECK-GI-FP16-NEXT:    cmp w8, #56
; CHECK-GI-FP16-NEXT:    faddp v2.8h, v1.8h, v1.8h
; CHECK-GI-FP16-NEXT:    faddp v1.8h, v2.8h, v1.8h
; CHECK-GI-FP16-NEXT:    faddp h1, v1.2h
; CHECK-GI-FP16-NEXT:    fadd h0, h1, h0
; CHECK-GI-FP16-NEXT:    b.ne .LBB13_1
; CHECK-GI-FP16-NEXT:  // %bb.2: // %exit
; CHECK-GI-FP16-NEXT:    ret
entry:
  br label %loop

loop:
  %iv = phi i32 [ 1, %entry ], [ %iv.next, %loop ]
  %ptr = phi ptr [ %ptr.start, %entry ], [ %ptr.next, %loop ]
  %red = phi half [ 0.000000e+00, %entry ], [ %red.next, %loop ]
  %lv = load <8 x half>, ptr %ptr, align 4
  %r = call fast half @llvm.vector.reduce.fadd.f16.v8f16(half -0.0, <8 x half> %lv)
  %red.next = fadd fast half %r, %red
  %ec = icmp eq i32 %iv, 7
  %ptr.next = getelementptr inbounds half, ptr %ptr, i64 4
  %iv.next= add nuw nsw i32 %iv, 1
  br i1 %ec, label %exit, label %loop

exit:
  ret half %red.next
}


define half @fadd_reduct_reassoc_v8f16(<8 x half> %a, <8 x half> %b) {
; CHECK-SD-NOFP16-LABEL: fadd_reduct_reassoc_v8f16:
; CHECK-SD-NOFP16:       // %bb.0:
; CHECK-SD-NOFP16-NEXT:    fcvtl v2.4s, v1.4h
; CHECK-SD-NOFP16-NEXT:    fcvtl v3.4s, v0.4h
; CHECK-SD-NOFP16-NEXT:    fcvtl2 v1.4s, v1.8h
; CHECK-SD-NOFP16-NEXT:    fcvtl2 v0.4s, v0.8h
; CHECK-SD-NOFP16-NEXT:    fadd v2.4s, v3.4s, v2.4s
; CHECK-SD-NOFP16-NEXT:    fadd v0.4s, v0.4s, v1.4s
; CHECK-SD-NOFP16-NEXT:    fcvtn v1.4h, v2.4s
; CHECK-SD-NOFP16-NEXT:    fcvtn2 v1.8h, v0.4s
; CHECK-SD-NOFP16-NEXT:    mov h0, v1.h[1]
; CHECK-SD-NOFP16-NEXT:    mov h2, v1.h[2]
; CHECK-SD-NOFP16-NEXT:    mov h3, v1.h[3]
; CHECK-SD-NOFP16-NEXT:    mov h4, v1.h[4]
; CHECK-SD-NOFP16-NEXT:    mov h5, v1.h[5]
; CHECK-SD-NOFP16-NEXT:    fcvt s6, h1
; CHECK-SD-NOFP16-NEXT:    mov h7, v1.h[6]
; CHECK-SD-NOFP16-NEXT:    mov h1, v1.h[7]
; CHECK-SD-NOFP16-NEXT:    fcvt s0, h0
; CHECK-SD-NOFP16-NEXT:    fcvt s2, h2
; CHECK-SD-NOFP16-NEXT:    fcvt s3, h3
; CHECK-SD-NOFP16-NEXT:    fcvt s4, h4
; CHECK-SD-NOFP16-NEXT:    fcvt s5, h5
; CHECK-SD-NOFP16-NEXT:    fcvt s1, h1
; CHECK-SD-NOFP16-NEXT:    fadd s0, s6, s0
; CHECK-SD-NOFP16-NEXT:    fadd s2, s2, s3
; CHECK-SD-NOFP16-NEXT:    fadd s3, s4, s5
; CHECK-SD-NOFP16-NEXT:    fcvt s4, h7
; CHECK-SD-NOFP16-NEXT:    fadd s0, s0, s2
; CHECK-SD-NOFP16-NEXT:    fadd s2, s3, s4
; CHECK-SD-NOFP16-NEXT:    fadd s0, s0, s2
; CHECK-SD-NOFP16-NEXT:    fadd s0, s0, s1
; CHECK-SD-NOFP16-NEXT:    fcvt h0, s0
; CHECK-SD-NOFP16-NEXT:    ret
;
; CHECK-SD-FP16-LABEL: fadd_reduct_reassoc_v8f16:
; CHECK-SD-FP16:       // %bb.0:
; CHECK-SD-FP16-NEXT:    fadd v0.8h, v0.8h, v1.8h
; CHECK-SD-FP16-NEXT:    faddp v1.8h, v0.8h, v0.8h
; CHECK-SD-FP16-NEXT:    faddp v0.8h, v1.8h, v0.8h
; CHECK-SD-FP16-NEXT:    faddp h0, v0.2h
; CHECK-SD-FP16-NEXT:    ret
;
; CHECK-GI-NOFP16-LABEL: fadd_reduct_reassoc_v8f16:
; CHECK-GI-NOFP16:       // %bb.0:
; CHECK-GI-NOFP16-NEXT:    fcvtl v2.4s, v0.4h
; CHECK-GI-NOFP16-NEXT:    fcvtl2 v0.4s, v0.8h
; CHECK-GI-NOFP16-NEXT:    fcvtl v3.4s, v1.4h
; CHECK-GI-NOFP16-NEXT:    fcvtl2 v1.4s, v1.8h
; CHECK-GI-NOFP16-NEXT:    fadd v0.4s, v2.4s, v0.4s
; CHECK-GI-NOFP16-NEXT:    fadd v1.4s, v3.4s, v1.4s
; CHECK-GI-NOFP16-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-GI-NOFP16-NEXT:    faddp v1.4s, v1.4s, v1.4s
; CHECK-GI-NOFP16-NEXT:    faddp s0, v0.2s
; CHECK-GI-NOFP16-NEXT:    faddp s1, v1.2s
; CHECK-GI-NOFP16-NEXT:    fcvt h0, s0
; CHECK-GI-NOFP16-NEXT:    fcvt h1, s1
; CHECK-GI-NOFP16-NEXT:    fcvt s0, h0
; CHECK-GI-NOFP16-NEXT:    fcvt s1, h1
; CHECK-GI-NOFP16-NEXT:    fadd s0, s0, s1
; CHECK-GI-NOFP16-NEXT:    fcvt h0, s0
; CHECK-GI-NOFP16-NEXT:    ret
;
; CHECK-GI-FP16-LABEL: fadd_reduct_reassoc_v8f16:
; CHECK-GI-FP16:       // %bb.0:
; CHECK-GI-FP16-NEXT:    faddp v2.8h, v0.8h, v0.8h
; CHECK-GI-FP16-NEXT:    faddp v3.8h, v1.8h, v1.8h
; CHECK-GI-FP16-NEXT:    faddp v0.8h, v2.8h, v0.8h
; CHECK-GI-FP16-NEXT:    faddp v1.8h, v3.8h, v1.8h
; CHECK-GI-FP16-NEXT:    faddp h0, v0.2h
; CHECK-GI-FP16-NEXT:    faddp h1, v1.2h
; CHECK-GI-FP16-NEXT:    fadd h0, h0, h1
; CHECK-GI-FP16-NEXT:    ret
  %r1 = call fast half @llvm.vector.reduce.fadd.f16.v8f16(half -0.0, <8 x half> %a)
  %r2 = call fast half @llvm.vector.reduce.fadd.f16.v8f16(half -0.0, <8 x half> %b)
  %r = fadd fast half %r1, %r2
  ret half %r
}

define float @fadd_reduct_reassoc_v8f32(<8 x float> %a, <8 x float> %b) {
; CHECK-SD-LABEL: fadd_reduct_reassoc_v8f32:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    fadd v2.4s, v2.4s, v3.4s
; CHECK-SD-NEXT:    fadd v0.4s, v0.4s, v1.4s
; CHECK-SD-NEXT:    fadd v0.4s, v0.4s, v2.4s
; CHECK-SD-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-SD-NEXT:    faddp s0, v0.2s
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: fadd_reduct_reassoc_v8f32:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    fadd v0.4s, v0.4s, v1.4s
; CHECK-GI-NEXT:    fadd v1.4s, v2.4s, v3.4s
; CHECK-GI-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-GI-NEXT:    faddp v1.4s, v1.4s, v1.4s
; CHECK-GI-NEXT:    faddp s0, v0.2s
; CHECK-GI-NEXT:    faddp s1, v1.2s
; CHECK-GI-NEXT:    fadd s0, s0, s1
; CHECK-GI-NEXT:    ret
  %r1 = call fast float @llvm.vector.reduce.fadd.f32.v8f32(float -0.0, <8 x float> %a)
  %r2 = call fast float @llvm.vector.reduce.fadd.f32.v8f32(float -0.0, <8 x float> %b)
  %r = fadd fast float %r1, %r2
  ret float %r
}

define float @fadd_reduct_reassoc_v4f32(<4 x float> %a, <4 x float> %b) {
; CHECK-SD-LABEL: fadd_reduct_reassoc_v4f32:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    fadd v0.4s, v0.4s, v1.4s
; CHECK-SD-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-SD-NEXT:    faddp s0, v0.2s
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: fadd_reduct_reassoc_v4f32:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-GI-NEXT:    faddp v1.4s, v1.4s, v1.4s
; CHECK-GI-NEXT:    faddp s0, v0.2s
; CHECK-GI-NEXT:    faddp s1, v1.2s
; CHECK-GI-NEXT:    fadd s0, s0, s1
; CHECK-GI-NEXT:    ret
  %r1 = call fast float @llvm.vector.reduce.fadd.f32.v4f32(float -0.0, <4 x float> %a)
  %r2 = call fast float @llvm.vector.reduce.fadd.f32.v4f32(float -0.0, <4 x float> %b)
  %r = fadd fast float %r1, %r2
  ret float %r
}

define float @fadd_reduct_reassoc_v4f32_init(float %i, <4 x float> %a, <4 x float> %b) {
; CHECK-LABEL: fadd_reduct_reassoc_v4f32_init:
; CHECK:       // %bb.0:
; CHECK-NEXT:    faddp v1.4s, v1.4s, v1.4s
; CHECK-NEXT:    faddp v2.4s, v2.4s, v2.4s
; CHECK-NEXT:    faddp s1, v1.2s
; CHECK-NEXT:    fadd s0, s0, s1
; CHECK-NEXT:    faddp s1, v2.2s
; CHECK-NEXT:    fadd s0, s0, s1
; CHECK-NEXT:    ret
  %r1 = call fast float @llvm.vector.reduce.fadd.f32.v4f32(float %i, <4 x float> %a)
  %r2 = call fast float @llvm.vector.reduce.fadd.f32.v4f32(float -0.0, <4 x float> %b)
  %r = fadd fast float %r1, %r2
  ret float %r
}

define float @fadd_reduct_reassoc_v4v8f32(<4 x float> %a, <8 x float> %b) {
; CHECK-SD-LABEL: fadd_reduct_reassoc_v4v8f32:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    fadd v1.4s, v1.4s, v2.4s
; CHECK-SD-NEXT:    fadd v0.4s, v0.4s, v1.4s
; CHECK-SD-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-SD-NEXT:    faddp s0, v0.2s
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: fadd_reduct_reassoc_v4v8f32:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    fadd v1.4s, v1.4s, v2.4s
; CHECK-GI-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-GI-NEXT:    faddp v1.4s, v1.4s, v1.4s
; CHECK-GI-NEXT:    faddp s0, v0.2s
; CHECK-GI-NEXT:    faddp s1, v1.2s
; CHECK-GI-NEXT:    fadd s0, s0, s1
; CHECK-GI-NEXT:    ret
  %r1 = call fast float @llvm.vector.reduce.fadd.f32.v4f32(float -0.0, <4 x float> %a)
  %r2 = call fast float @llvm.vector.reduce.fadd.f32.v8f32(float -0.0, <8 x float> %b)
  %r = fadd fast float %r1, %r2
  ret float %r
}

define double @fadd_reduct_reassoc_v4f64(<4 x double> %a, <4 x double> %b) {
; CHECK-SD-LABEL: fadd_reduct_reassoc_v4f64:
; CHECK-SD:       // %bb.0:
; CHECK-SD-NEXT:    fadd v2.2d, v2.2d, v3.2d
; CHECK-SD-NEXT:    fadd v0.2d, v0.2d, v1.2d
; CHECK-SD-NEXT:    fadd v0.2d, v0.2d, v2.2d
; CHECK-SD-NEXT:    faddp d0, v0.2d
; CHECK-SD-NEXT:    ret
;
; CHECK-GI-LABEL: fadd_reduct_reassoc_v4f64:
; CHECK-GI:       // %bb.0:
; CHECK-GI-NEXT:    fadd v0.2d, v0.2d, v1.2d
; CHECK-GI-NEXT:    fadd v1.2d, v2.2d, v3.2d
; CHECK-GI-NEXT:    faddp d0, v0.2d
; CHECK-GI-NEXT:    faddp d1, v1.2d
; CHECK-GI-NEXT:    fadd d0, d0, d1
; CHECK-GI-NEXT:    ret
  %r1 = call fast double @llvm.vector.reduce.fadd.f64.v4f64(double -0.0, <4 x double> %a)
  %r2 = call fast double @llvm.vector.reduce.fadd.f64.v4f64(double -0.0, <4 x double> %b)
  %r = fadd fast double %r1, %r2
  ret double %r
}

define float @fadd_reduct_reassoc_v4f32_extrause(<4 x float> %a, <4 x float> %b) {
; CHECK-LABEL: fadd_reduct_reassoc_v4f32_extrause:
; CHECK:       // %bb.0:
; CHECK-NEXT:    faddp v0.4s, v0.4s, v0.4s
; CHECK-NEXT:    faddp v1.4s, v1.4s, v1.4s
; CHECK-NEXT:    faddp s0, v0.2s
; CHECK-NEXT:    faddp s1, v1.2s
; CHECK-NEXT:    fadd s1, s0, s1
; CHECK-NEXT:    fmul s0, s1, s0
; CHECK-NEXT:    ret
  %r1 = call fast float @llvm.vector.reduce.fadd.f32.v4f32(float -0.0, <4 x float> %a)
  %r2 = call fast float @llvm.vector.reduce.fadd.f32.v4f32(float -0.0, <4 x float> %b)
  %r = fadd fast float %r1, %r2
  %p = fmul float %r, %r1
  ret float %p
}

; Function Attrs: nounwind readnone
declare half @llvm.vector.reduce.fadd.f16.v4f16(half, <4 x half>)
declare half @llvm.vector.reduce.fadd.f16.v8f16(half, <8 x half>)
declare half @llvm.vector.reduce.fadd.f16.v16f16(half, <16 x half>)
declare float @llvm.vector.reduce.fadd.f32.v2f32(float, <2 x float>)
declare float @llvm.vector.reduce.fadd.f32.v4f32(float, <4 x float>)
declare float @llvm.vector.reduce.fadd.f32.v8f32(float, <8 x float>)
declare double @llvm.vector.reduce.fadd.f64.v2f64(double, <2 x double>)
declare double @llvm.vector.reduce.fadd.f64.v4f64(double, <4 x double>)