; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt %s -S -riscv-gather-scatter-lowering -mtriple=riscv64 -mattr=+m,+v | FileCheck %s --check-prefixes=CHECK

%struct.foo = type { i32, i32, i32, i32 }

declare <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()

define <vscale x 1 x i64> @gather(ptr %a, i32 %len) {
; CHECK-LABEL: @gather(
; CHECK-NEXT:  vector.ph:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[LEN:%.*]] to i64
; CHECK-NEXT:    [[TMP0:%.*]] = tail call i64 @llvm.vscale.i64()
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH:%.*]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND_SCALAR:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT_SCALAR:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[ACCUM:%.*]] = phi <vscale x 1 x i64> [ zeroinitializer, [[VECTOR_PH]] ], [ [[ACCUM_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr [[STRUCT_FOO:%.*]], ptr [[A:%.*]], i64 [[VEC_IND_SCALAR]], i32 3
; CHECK-NEXT:    [[GATHER:%.*]] = call <vscale x 1 x i64> @llvm.riscv.masked.strided.load.nxv1i64.p0.i64(<vscale x 1 x i64> undef, ptr [[TMP1]], i64 16, <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i32 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer))
; CHECK-NEXT:    [[ACCUM_NEXT]] = add <vscale x 1 x i64> [[ACCUM]], [[GATHER]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP0]]
; CHECK-NEXT:    [[VEC_IND_NEXT_SCALAR]] = add i64 [[VEC_IND_SCALAR]], [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ne i64 [[INDEX_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[TMP2]], label [[FOR_COND_CLEANUP:%.*]], label [[VECTOR_BODY]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret <vscale x 1 x i64> [[ACCUM_NEXT]]
;
vector.ph:
  %wide.trip.count = zext i32 %len to i64
  %0 = tail call i64 @llvm.vscale.i64()
  %1 = tail call <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()
  %.splatinsert = insertelement <vscale x 1 x i64> poison, i64 %0, i64 0
  %.splat = shufflevector <vscale x 1 x i64> %.splatinsert, <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.ind = phi <vscale x 1 x i64> [ %1, %vector.ph ], [ %vec.ind.next, %vector.body ]
  %accum = phi <vscale x 1 x i64> [ zeroinitializer, %vector.ph ], [ %accum.next, %vector.body ]
  %2 = getelementptr inbounds %struct.foo, ptr %a, <vscale x 1 x i64> %vec.ind, i32 3
  %gather = call <vscale x 1 x i64> @llvm.masked.gather.nxv1i64.nxv1p0(<vscale x 1 x ptr> %2, i32 8, <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i32 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer), <vscale x 1 x i64> undef)
  %accum.next = add <vscale x 1 x i64> %accum, %gather
  %index.next = add nuw i64 %index, %0
  %vec.ind.next = add <vscale x 1 x i64> %vec.ind, %.splat
  %3 = icmp ne i64 %index.next, %wide.trip.count
  br i1 %3, label %for.cond.cleanup, label %vector.body

for.cond.cleanup:                                 ; preds = %vector.body
  ret <vscale x 1 x i64> %accum.next
}

define <vscale x 1 x i64> @gather_disjoint_or(ptr %a, i64 %len) {
; CHECK-LABEL: @gather_disjoint_or(
; CHECK-NEXT:  vector.ph:
; CHECK-NEXT:    [[VSCALE:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH:%.*]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND_SCALAR:%.*]] = phi i64 [ 1, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT_SCALAR:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[ACCUM:%.*]] = phi <vscale x 1 x i64> [ zeroinitializer, [[VECTOR_PH]] ], [ [[ACCUM_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr i64, ptr [[A:%.*]], i64 [[VEC_IND_SCALAR]]
; CHECK-NEXT:    [[GATHER:%.*]] = call <vscale x 1 x i64> @llvm.riscv.masked.strided.load.nxv1i64.p0.i64(<vscale x 1 x i64> poison, ptr [[TMP0]], i64 16, <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i32 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer))
; CHECK-NEXT:    [[ACCUM_NEXT]] = add <vscale x 1 x i64> [[ACCUM]], [[GATHER]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[VSCALE]]
; CHECK-NEXT:    [[VEC_IND_NEXT_SCALAR]] = add i64 [[VEC_IND_SCALAR]], 2
; CHECK-NEXT:    [[EXIT:%.*]] = icmp ne i64 [[INDEX_NEXT]], [[LEN:%.*]]
; CHECK-NEXT:    br i1 [[EXIT]], label [[FOR_COND_CLEANUP:%.*]], label [[VECTOR_BODY]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret <vscale x 1 x i64> [[ACCUM_NEXT]]
;
vector.ph:
  %vscale = call i64 @llvm.vscale.i64()
  %step = tail call <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()
  %step.mul2 = shl <vscale x 1 x i64> %step, shufflevector(<vscale x 1 x i64> insertelement(<vscale x 1 x i64> poison, i64 1, i32 0), <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer)
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.ind = phi <vscale x 1 x i64> [ %step.mul2, %vector.ph ], [ %vec.ind.next, %vector.body ]

  %accum = phi <vscale x 1 x i64> [ zeroinitializer, %vector.ph ], [ %accum.next, %vector.body ]

  %vec.ind.or = or disjoint <vscale x 1 x i64> %vec.ind, shufflevector(<vscale x 1 x i64> insertelement(<vscale x 1 x i64> poison, i64 1, i64 0), <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer)

  %gep = getelementptr i64, ptr %a, <vscale x 1 x i64> %vec.ind.or
  %gather = call <vscale x 1 x i64> @llvm.masked.gather.nxv1i64.nxv1p0(
  <vscale x 1 x ptr> %gep,
  i32 8,
  <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i32 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer),
  <vscale x 1 x i64> poison
  )

  %accum.next = add <vscale x 1 x i64> %accum, %gather
  %index.next = add nuw i64 %index, %vscale
  %vec.ind.next = add <vscale x 1 x i64> %vec.ind, shufflevector(<vscale x 1 x i64> insertelement(<vscale x 1 x i64> poison, i64 2, i64 0), <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer)

  %exit = icmp ne i64 %index.next, %len
  br i1 %exit, label %for.cond.cleanup, label %vector.body

for.cond.cleanup:                                 ; preds = %vector.body
  ret <vscale x 1 x i64> %accum.next
}

define void @scatter(ptr %a, i32 %len) {
; CHECK-LABEL: @scatter(
; CHECK-NEXT:  vector.ph:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[LEN:%.*]] to i64
; CHECK-NEXT:    [[TMP0:%.*]] = tail call i64 @llvm.vscale.i64()
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH:%.*]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND_SCALAR:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT_SCALAR:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr [[STRUCT_FOO:%.*]], ptr [[A:%.*]], i64 [[VEC_IND_SCALAR]], i32 3
; CHECK-NEXT:    call void @llvm.riscv.masked.strided.store.nxv1i64.p0.i64(<vscale x 1 x i64> zeroinitializer, ptr [[TMP1]], i64 16, <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i32 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer))
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP0]]
; CHECK-NEXT:    [[VEC_IND_NEXT_SCALAR]] = add i64 [[VEC_IND_SCALAR]], [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ne i64 [[INDEX_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[TMP2]], label [[FOR_COND_CLEANUP:%.*]], label [[VECTOR_BODY]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
vector.ph:
  %wide.trip.count = zext i32 %len to i64
  %0 = tail call i64 @llvm.vscale.i64()
  %1 = tail call <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()
  %.splatinsert = insertelement <vscale x 1 x i64> poison, i64 %0, i64 0
  %.splat = shufflevector <vscale x 1 x i64> %.splatinsert, <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.ind = phi <vscale x 1 x i64> [ %1, %vector.ph ], [ %vec.ind.next, %vector.body ]
  %2 = getelementptr inbounds %struct.foo, ptr %a, <vscale x 1 x i64> %vec.ind, i32 3
  tail call void @llvm.masked.scatter.nxv1i64.nxv1p0(<vscale x 1 x i64> zeroinitializer, <vscale x 1 x ptr> %2, i32 8, <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i32 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer))
  %index.next = add nuw i64 %index, %0
  %vec.ind.next = add <vscale x 1 x i64> %vec.ind, %.splat
  %3 = icmp ne i64 %index.next, %wide.trip.count
  br i1 %3, label %for.cond.cleanup, label %vector.body

for.cond.cleanup:                                 ; preds = %vector.body
  ret void
}

define <vscale x 1 x i64> @gather_loopless(ptr %p, i64 %stride) {
; CHECK-LABEL: @gather_loopless(
; CHECK-NEXT:    [[TMP1:%.*]] = mul i64 [[STRIDE:%.*]], 4
; CHECK-NEXT:    [[X:%.*]] = call <vscale x 1 x i64> @llvm.riscv.masked.strided.load.nxv1i64.p0.i64(<vscale x 1 x i64> poison, ptr [[P:%.*]], i64 [[TMP1]], <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer))
; CHECK-NEXT:    ret <vscale x 1 x i64> [[X]]
;
  %step = call <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()
  %splat.insert = insertelement <vscale x 1 x i64> poison, i64 %stride, i64 0
  %splat = shufflevector <vscale x 1 x i64> %splat.insert, <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer
  %offsets = mul <vscale x 1 x i64> %step, %splat
  %ptrs = getelementptr i32, ptr %p, <vscale x 1 x i64> %offsets
  %x = call <vscale x 1 x i64> @llvm.masked.gather.nxv1i64.nxv1p0(
  <vscale x 1 x ptr> %ptrs,
  i32 8,
  <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 1, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer),
  <vscale x 1 x i64> poison
  )
  ret <vscale x 1 x i64> %x
}

define <vscale x 1 x i64> @straightline_offset_add(ptr %p, i64 %offset) {
; CHECK-LABEL: @straightline_offset_add(
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 [[OFFSET:%.*]]
; CHECK-NEXT:    [[X:%.*]] = call <vscale x 1 x i64> @llvm.riscv.masked.strided.load.nxv1i64.p0.i64(<vscale x 1 x i64> poison, ptr [[TMP1]], i64 4, <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer))
; CHECK-NEXT:    ret <vscale x 1 x i64> [[X]]
;
  %step = call <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()
  %splat.insert = insertelement <vscale x 1 x i64> poison, i64 %offset, i64 0
  %splat = shufflevector <vscale x 1 x i64> %splat.insert, <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer
  %offsetv = add <vscale x 1 x i64> %step, %splat
  %ptrs = getelementptr i32, ptr %p, <vscale x 1 x i64> %offsetv
  %x = call <vscale x 1 x i64> @llvm.masked.gather.nxv1i64.nxv1p0(
  <vscale x 1 x ptr> %ptrs,
  i32 8,
  <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 1, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer),
  <vscale x 1 x i64> poison
  )
  ret <vscale x 1 x i64> %x
}

define <vscale x 1 x i64> @straightline_offset_disjoint_or(ptr %p, i64 %offset) {
; CHECK-LABEL: @straightline_offset_disjoint_or(
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 1
; CHECK-NEXT:    [[X:%.*]] = call <vscale x 1 x i64> @llvm.riscv.masked.strided.load.nxv1i64.p0.i64(<vscale x 1 x i64> poison, ptr [[TMP1]], i64 8, <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer))
; CHECK-NEXT:    ret <vscale x 1 x i64> [[X]]
;
  %step = call <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()
  %step.shl = shl <vscale x 1 x i64> %step, shufflevector (<vscale x 1 x i64> insertelement (<vscale x 1 x i64> poison, i64 1, i32 0), <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer)
  %offsetv = or disjoint <vscale x 1 x i64> %step.shl, shufflevector (<vscale x 1 x i64> insertelement (<vscale x 1 x i64> poison, i64 1, i32 0), <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer)
  %ptrs = getelementptr i32, ptr %p, <vscale x 1 x i64> %offsetv
  %x = call <vscale x 1 x i64> @llvm.masked.gather.nxv1i64.nxv1p0(
  <vscale x 1 x ptr> %ptrs,
  i32 8,
  <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer),
  <vscale x 1 x i64> poison
  )
  ret <vscale x 1 x i64> %x
}

define <vscale x 1 x i64> @straightline_offset_shl(ptr %p) {
; CHECK-LABEL: @straightline_offset_shl(
; CHECK-NEXT:    [[X:%.*]] = call <vscale x 1 x i64> @llvm.riscv.masked.strided.load.nxv1i64.p0.i64(<vscale x 1 x i64> poison, ptr [[P:%.*]], i64 32, <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer))
; CHECK-NEXT:    ret <vscale x 1 x i64> [[X]]
;
  %step = call <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()
  %splat.insert = insertelement <vscale x 1 x i64> poison, i64 3, i64 0
  %splat = shufflevector <vscale x 1 x i64> %splat.insert, <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer
  %offset = shl <vscale x 1 x i64> %step, %splat
  %ptrs = getelementptr i32, ptr %p, <vscale x 1 x i64> %offset
  %x = call <vscale x 1 x i64> @llvm.masked.gather.nxv1i64.nxv1p0(
  <vscale x 1 x ptr> %ptrs,
  i32 8,
  <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 1, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer),
  <vscale x 1 x i64> poison
  )
  ret <vscale x 1 x i64> %x
}

define <vscale x 1 x i64> @neg_shl_is_not_commutative(ptr %p) {
; CHECK-LABEL: @neg_shl_is_not_commutative(
; CHECK-NEXT:    [[STEP:%.*]] = call <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()
; CHECK-NEXT:    [[SPLAT_INSERT:%.*]] = insertelement <vscale x 1 x i64> poison, i64 3, i64 0
; CHECK-NEXT:    [[SPLAT:%.*]] = shufflevector <vscale x 1 x i64> [[SPLAT_INSERT]], <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer
; CHECK-NEXT:    [[OFFSET:%.*]] = shl <vscale x 1 x i64> [[SPLAT]], [[STEP]]
; CHECK-NEXT:    [[PTRS:%.*]] = getelementptr i32, ptr [[P:%.*]], <vscale x 1 x i64> [[OFFSET]]
; CHECK-NEXT:    [[X:%.*]] = call <vscale x 1 x i64> @llvm.masked.gather.nxv1i64.nxv1p0(<vscale x 1 x ptr> [[PTRS]], i32 8, <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer), <vscale x 1 x i64> poison)
; CHECK-NEXT:    ret <vscale x 1 x i64> [[X]]
;
  %step = call <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()
  %splat.insert = insertelement <vscale x 1 x i64> poison, i64 3, i64 0
  %splat = shufflevector <vscale x 1 x i64> %splat.insert, <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer
  %offset = shl <vscale x 1 x i64> %splat, %step
  %ptrs = getelementptr i32, ptr %p, <vscale x 1 x i64> %offset
  %x = call <vscale x 1 x i64> @llvm.masked.gather.nxv1i64.nxv1p0(
  <vscale x 1 x ptr> %ptrs,
  i32 8,
  <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 1, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer),
  <vscale x 1 x i64> poison
  )
  ret <vscale x 1 x i64> %x
}

define <vscale x 1 x i64> @straightline_offset_shl_nonc(ptr %p, i64 %shift) {
; CHECK-LABEL: @straightline_offset_shl_nonc(
; CHECK-NEXT:    [[TMP1:%.*]] = shl i64 1, [[SHIFT:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = mul i64 [[TMP1]], 4
; CHECK-NEXT:    [[X:%.*]] = call <vscale x 1 x i64> @llvm.riscv.masked.strided.load.nxv1i64.p0.i64(<vscale x 1 x i64> poison, ptr [[P:%.*]], i64 [[TMP2]], <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer))
; CHECK-NEXT:    ret <vscale x 1 x i64> [[X]]
;
  %step = call <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()
  %splat.insert = insertelement <vscale x 1 x i64> poison, i64 %shift, i64 0
  %splat = shufflevector <vscale x 1 x i64> %splat.insert, <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer
  %offset = shl <vscale x 1 x i64> %step, %splat
  %ptrs = getelementptr i32, ptr %p, <vscale x 1 x i64> %offset
  %x = call <vscale x 1 x i64> @llvm.masked.gather.nxv1i64.nxv1p0(
  <vscale x 1 x ptr> %ptrs,
  i32 8,
  <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 1, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer),
  <vscale x 1 x i64> poison
  )
  ret <vscale x 1 x i64> %x
}

define void @scatter_loopless(<vscale x 1 x i64> %x, ptr %p, i64 %stride) {
; CHECK-LABEL: @scatter_loopless(
; CHECK-NEXT:    [[TMP1:%.*]] = mul i64 [[STRIDE:%.*]], 4
; CHECK-NEXT:    call void @llvm.riscv.masked.strided.store.nxv1i64.p0.i64(<vscale x 1 x i64> [[X:%.*]], ptr [[P:%.*]], i64 [[TMP1]], <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer))
; CHECK-NEXT:    ret void
;
  %step = call <vscale x 1 x i64> @llvm.experimental.stepvector.nxv1i64()
  %splat.insert = insertelement <vscale x 1 x i64> poison, i64 %stride, i64 0
  %splat = shufflevector <vscale x 1 x i64> %splat.insert, <vscale x 1 x i64> poison, <vscale x 1 x i32> zeroinitializer
  %offsets = mul <vscale x 1 x i64> %step, %splat
  %ptrs = getelementptr i32, ptr %p, <vscale x 1 x i64> %offsets
  call void @llvm.masked.scatter.nxv1i64.nxv1p0(
  <vscale x 1 x i64> %x,
  <vscale x 1 x ptr> %ptrs,
  i32 8,
  <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 1, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer)
  )
  ret void
}

; We previously crashed expecting a constant to be fixed length.
define void @constant_stride(<vscale x 1 x i64> %x, ptr %p, i64 %stride) {
; CHECK-LABEL: @constant_stride(
; CHECK-NEXT:    [[PTRS:%.*]] = getelementptr i32, ptr [[P:%.*]], <vscale x 1 x i64> zeroinitializer
; CHECK-NEXT:    call void @llvm.masked.scatter.nxv1i64.nxv1p0(<vscale x 1 x i64> [[X:%.*]], <vscale x 1 x ptr> [[PTRS]], i32 8, <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 true, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer))
; CHECK-NEXT:    ret void
;
  %ptrs = getelementptr i32, ptr %p, <vscale x 1 x i64> zeroinitializer
  call void @llvm.masked.scatter.nxv1i64.nxv1p0(
  <vscale x 1 x i64> %x,
  <vscale x 1 x ptr> %ptrs,
  i32 8,
  <vscale x 1 x i1> shufflevector (<vscale x 1 x i1> insertelement (<vscale x 1 x i1> poison, i1 1, i64 0), <vscale x 1 x i1> poison, <vscale x 1 x i32> zeroinitializer)
  )
  ret void
}

declare i64 @llvm.vscale.i64()
declare void @llvm.masked.scatter.nxv1i64.nxv1p0(<vscale x 1 x i64>, <vscale x 1 x ptr>, i32, <vscale x 1 x i1>)
declare <vscale x 1 x i64> @llvm.masked.gather.nxv1i64.nxv1p0(<vscale x 1 x ptr>, i32, <vscale x 1 x i1>, <vscale x 1 x i64>)