; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6
; RUN: opt -passes=loop-vectorize -force-vector-width=8 -enable-epilogue-vectorization -epilogue-vectorization-force-VF=4 -S %s | FileCheck %s

;
; Integer reduction with a start value of 5
;
define i64 @int_reduction_add(ptr %a, i64 %N) {
; CHECK-LABEL: define i64 @int_reduction_add(
; CHECK-SAME: ptr [[A:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ITER_CHECK:.*]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[N]], 8
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i64 [[N]], 7
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI:%.*]] = phi <8 x i64> [ <i64 5, i64 0, i64 0, i64 0, i64 0, i64 0, i64 0, i64 0>, %[[VECTOR_PH]] ], [ [[TMP2:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <8 x i64>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP2]] = add <8 x i64> [[WIDE_LOAD]], [[VEC_PHI]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP4]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP3:%.*]] = call i64 @llvm.vector.reduce.add.v8i64(<8 x i64> [[TMP2]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[FOR_END:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_MOD_VF]], 4
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3:![0-9]+]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i64 [ [[TMP3]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 5, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF2:%.*]] = and i64 [[N]], 3
; CHECK-NEXT:    [[N_VEC3:%.*]] = sub i64 [[N]], [[N_MOD_VF2]]
; CHECK-NEXT:    [[TMP6:%.*]] = insertelement <4 x i64> zeroinitializer, i64 [[BC_MERGE_RDX]], i64 0
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX4:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT7:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI5:%.*]] = phi <4 x i64> [ [[TMP6]], %[[VEC_EPILOG_PH]] ], [ [[TMP10:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[INDEX4]]
; CHECK-NEXT:    [[WIDE_LOAD6:%.*]] = load <4 x i64>, ptr [[TMP8]], align 4
; CHECK-NEXT:    [[TMP10]] = add <4 x i64> [[WIDE_LOAD6]], [[VEC_PHI5]]
; CHECK-NEXT:    [[INDEX_NEXT7]] = add nuw i64 [[INDEX4]], 4
; CHECK-NEXT:    [[TMP11:%.*]] = icmp eq i64 [[INDEX_NEXT7]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[TMP11]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP12:%.*]] = call i64 @llvm.vector.reduce.add.v4i64(<4 x i64> [[TMP10]])
; CHECK-NEXT:    [[CMP_N8:%.*]] = icmp eq i64 [[N]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[CMP_N8]], label %[[FOR_END]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC3]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX8:%.*]] = phi i64 [ [[TMP12]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP3]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 5, %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[SUM:%.*]] = phi i64 [ [[BC_MERGE_RDX8]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[ADD:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[IV]]
; CHECK-NEXT:    [[TMP13:%.*]] = load i64, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[ADD]] = add i64 [[TMP13]], [[SUM]]
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label %[[FOR_END]], label %[[FOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK:       [[FOR_END]]:
; CHECK-NEXT:    [[ADD_LCSSA:%.*]] = phi i64 [ [[ADD]], %[[FOR_BODY]] ], [ [[TMP3]], %[[MIDDLE_BLOCK]] ], [ [[TMP12]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[ADD_LCSSA]]
;
entry:
  br label %for.body

for.body:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
  %sum = phi i64 [ 5, %entry ], [ %add, %for.body ]
  %arrayidx = getelementptr inbounds i64, ptr %a, i64 %iv
  %0 = load i64, ptr %arrayidx
  %add = add i64 %0, %sum
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond.not = icmp eq i64 %iv.next, %N
  br i1 %exitcond.not, label %for.end, label %for.body

for.end:
  ret i64 %add
}

;
; Floating point max reduction
;
define float @fp_reduction_max(ptr noalias %a, i64 %N) {
; CHECK-LABEL: define float @fp_reduction_max(
; CHECK-SAME: ptr noalias [[A:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ITER_CHECK:.*]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[N]], 8
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i64 [[N]], 7
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI:%.*]] = phi <8 x float> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP2:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <8 x float>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP3:%.*]] = fcmp fast ogt <8 x float> [[VEC_PHI]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP2]] = select fast <8 x i1> [[TMP3]], <8 x float> [[VEC_PHI]], <8 x float> [[WIDE_LOAD]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP5]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP4:%.*]] = call fast float @llvm.vector.reduce.fmax.v8f32(<8 x float> [[TMP2]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[FOR_END:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_MOD_VF]], 4
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi float [ [[TMP4]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0.000000e+00, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF2:%.*]] = and i64 [[N]], 3
; CHECK-NEXT:    [[N_VEC3:%.*]] = sub i64 [[N]], [[N_MOD_VF2]]
; CHECK-NEXT:    [[MINMAX_IDENT_SPLATINSERT:%.*]] = insertelement <4 x float> poison, float [[BC_MERGE_RDX]], i64 0
; CHECK-NEXT:    [[MINMAX_IDENT_SPLAT:%.*]] = shufflevector <4 x float> [[MINMAX_IDENT_SPLATINSERT]], <4 x float> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX4:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT7:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI5:%.*]] = phi <4 x float> [ [[MINMAX_IDENT_SPLAT]], %[[VEC_EPILOG_PH]] ], [ [[TMP11:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDEX4]]
; CHECK-NEXT:    [[WIDE_LOAD6:%.*]] = load <4 x float>, ptr [[TMP8]], align 4
; CHECK-NEXT:    [[TMP10:%.*]] = fcmp fast ogt <4 x float> [[VEC_PHI5]], [[WIDE_LOAD6]]
; CHECK-NEXT:    [[TMP11]] = select fast <4 x i1> [[TMP10]], <4 x float> [[VEC_PHI5]], <4 x float> [[WIDE_LOAD6]]
; CHECK-NEXT:    [[INDEX_NEXT7]] = add nuw i64 [[INDEX4]], 4
; CHECK-NEXT:    [[TMP12:%.*]] = icmp eq i64 [[INDEX_NEXT7]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[TMP12]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP7:![0-9]+]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP13:%.*]] = call fast float @llvm.vector.reduce.fmax.v4f32(<4 x float> [[TMP11]])
; CHECK-NEXT:    [[CMP_N8:%.*]] = icmp eq i64 [[N]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[CMP_N8]], label %[[FOR_END]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC3]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX8:%.*]] = phi float [ [[TMP13]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP4]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0.000000e+00, %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], %[[FOR_BODY]] ], [ [[BC_RESUME_VAL]], %[[VEC_EPILOG_SCALAR_PH]] ]
; CHECK-NEXT:    [[RESULT_08:%.*]] = phi float [ [[V0:%.*]], %[[FOR_BODY]] ], [ [[BC_MERGE_RDX8]], %[[VEC_EPILOG_SCALAR_PH]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[L0:%.*]] = load float, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[C0:%.*]] = fcmp fast ogt float [[RESULT_08]], [[L0]]
; CHECK-NEXT:    [[V0]] = select fast i1 [[C0]], float [[RESULT_08]], float [[L0]]
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[FOR_END]], label %[[FOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; CHECK:       [[FOR_END]]:
; CHECK-NEXT:    [[V0_LCSSA:%.*]] = phi float [ [[V0]], %[[FOR_BODY]] ], [ [[TMP4]], %[[MIDDLE_BLOCK]] ], [ [[TMP13]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret float [[V0_LCSSA]]
;
entry:
  br label %for.body

for.body:
  %indvars.iv = phi i64 [ %iv.next, %for.body ], [ 0, %entry ]
  %result.08 = phi float [ %v0, %for.body ], [ 0.000000e+00, %entry ]
  %arrayidx = getelementptr inbounds float, ptr %a, i64 %indvars.iv
  %l0 = load float, ptr %arrayidx
  %c0 = fcmp fast ogt float %result.08, %l0
  %v0 = select fast i1 %c0, float %result.08, float %l0
  %iv.next = add i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %iv.next, %N
  br i1 %exitcond, label %for.end, label %for.body

for.end:
  ret float %v0
}

;
; Extension is required before the reduction operation & result is truncated
;
define i16 @reduction_or_trunc(ptr noalias nocapture %ptr) {
; CHECK-LABEL: define i16 @reduction_or_trunc(
; CHECK-SAME: ptr noalias captures(none) [[PTR:%.*]]) {
; CHECK-NEXT:  [[ITER_CHECK:.*]]:
; CHECK-NEXT:    br i1 false, label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT:    br i1 false, label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI:%.*]] = phi <8 x i32> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP5:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = and <8 x i32> [[VEC_PHI]], splat (i32 65535)
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i16, ptr [[PTR]], i32 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <8 x i16>, ptr [[TMP2]], align 2
; CHECK-NEXT:    [[TMP6:%.*]] = zext <8 x i16> [[WIDE_LOAD]] to <8 x i32>
; CHECK-NEXT:    [[TMP3:%.*]] = or <8 x i32> [[TMP0]], [[TMP6]]
; CHECK-NEXT:    [[TMP4:%.*]] = trunc <8 x i32> [[TMP3]] to <8 x i16>
; CHECK-NEXT:    [[TMP5]] = zext <8 x i16> [[TMP4]] to <8 x i32>
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 8
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i32 [[INDEX_NEXT]], 256
; CHECK-NEXT:    br i1 [[TMP8]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP9:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP10:%.*]] = call i16 @llvm.vector.reduce.or.v8i16(<8 x i16> [[TMP4]])
; CHECK-NEXT:    [[TMP11:%.*]] = zext i16 [[TMP10]] to i32
; CHECK-NEXT:    br i1 true, label %[[FOR_END:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    br i1 true, label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i32 [ 256, %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP11]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[TMP9:%.*]] = insertelement <4 x i32> zeroinitializer, i32 [[BC_MERGE_RDX]], i64 0
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX1:%.*]] = phi i32 [ [[VEC_EPILOG_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT4:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI2:%.*]] = phi <4 x i32> [ [[TMP9]], %[[VEC_EPILOG_PH]] ], [ [[TMP20:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP14:%.*]] = and <4 x i32> [[VEC_PHI2]], splat (i32 65535)
; CHECK-NEXT:    [[TMP15:%.*]] = getelementptr inbounds i16, ptr [[PTR]], i32 [[INDEX1]]
; CHECK-NEXT:    [[WIDE_LOAD3:%.*]] = load <4 x i16>, ptr [[TMP15]], align 2
; CHECK-NEXT:    [[TMP17:%.*]] = zext <4 x i16> [[WIDE_LOAD3]] to <4 x i32>
; CHECK-NEXT:    [[TMP18:%.*]] = or <4 x i32> [[TMP14]], [[TMP17]]
; CHECK-NEXT:    [[TMP19:%.*]] = trunc <4 x i32> [[TMP18]] to <4 x i16>
; CHECK-NEXT:    [[TMP20]] = zext <4 x i16> [[TMP19]] to <4 x i32>
; CHECK-NEXT:    [[INDEX_NEXT4]] = add nuw i32 [[INDEX1]], 4
; CHECK-NEXT:    [[TMP21:%.*]] = icmp eq i32 [[INDEX_NEXT4]], 256
; CHECK-NEXT:    br i1 [[TMP21]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP10:![0-9]+]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP23:%.*]] = call i16 @llvm.vector.reduce.or.v4i16(<4 x i16> [[TMP19]])
; CHECK-NEXT:    [[TMP24:%.*]] = zext i16 [[TMP23]] to i32
; CHECK-NEXT:    br i1 true, label %[[FOR_END]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i32 [ 256, %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ 256, %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX5:%.*]] = phi i32 [ [[TMP24]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP11]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ [[IV_NEXT:%.*]], %[[FOR_BODY]] ], [ [[BC_RESUME_VAL]], %[[VEC_EPILOG_SCALAR_PH]] ]
; CHECK-NEXT:    [[SUM_02P:%.*]] = phi i32 [ [[XOR:%.*]], %[[FOR_BODY]] ], [ [[BC_MERGE_RDX5]], %[[VEC_EPILOG_SCALAR_PH]] ]
; CHECK-NEXT:    [[SUM_02:%.*]] = and i32 [[SUM_02P]], 65535
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i16, ptr [[PTR]], i32 [[IV]]
; CHECK-NEXT:    [[LOAD:%.*]] = load i16, ptr [[GEP]], align 2
; CHECK-NEXT:    [[EXT:%.*]] = zext i16 [[LOAD]] to i32
; CHECK-NEXT:    [[XOR]] = or i32 [[SUM_02]], [[EXT]]
; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[IV_NEXT]], 256
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[FOR_END]], label %[[FOR_BODY]], !llvm.loop [[LOOP11:![0-9]+]]
; CHECK:       [[FOR_END]]:
; CHECK-NEXT:    [[XOR_LCSSA:%.*]] = phi i32 [ [[XOR]], %[[FOR_BODY]] ], [ [[TMP11]], %[[MIDDLE_BLOCK]] ], [ [[TMP24]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    [[RET:%.*]] = trunc i32 [[XOR_LCSSA]] to i16
; CHECK-NEXT:    ret i16 [[RET]]
;
entry:
  br label %for.body

for.body:
  %iv = phi i32 [ %iv.next, %for.body ], [ 0, %entry ]
  %sum.02p = phi i32 [ %xor, %for.body ], [ 0, %entry ]
  %sum.02 = and i32 %sum.02p, 65535
  %gep = getelementptr inbounds i16, ptr %ptr, i32 %iv
  %load = load i16, ptr %gep
  %ext = zext i16 %load to i32
  %xor = or i32 %sum.02, %ext
  %iv.next = add i32 %iv, 1
  %exitcond = icmp eq i32 %iv.next, 256
  br i1 %exitcond, label %for.end, label %for.body

for.end:
  %ret = trunc i32 %xor to i16
  ret i16 %ret
}

;
; More than one reduction in the loop
;
define float @multiple_fp_rdx(ptr %A, i64 %N) {
; CHECK-LABEL: define float @multiple_fp_rdx(
; CHECK-SAME: ptr [[A:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ITER_CHECK:.*]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[N]], 8
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i64 [[N]], 7
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI:%.*]] = phi <8 x float> [ <float 1.500000e+01, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00>, %[[VECTOR_PH]] ], [ [[TMP2:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI2:%.*]] = phi <8 x float> [ <float 1.000000e+01, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00>, %[[VECTOR_PH]] ], [ [[TMP3:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <8 x float>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP3]] = fadd fast <8 x float> [[VEC_PHI2]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP2]] = fmul fast <8 x float> [[VEC_PHI]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP5]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP12:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP4:%.*]] = call fast float @llvm.vector.reduce.fmul.v8f32(float 1.000000e+00, <8 x float> [[TMP2]])
; CHECK-NEXT:    [[TMP6:%.*]] = call fast float @llvm.vector.reduce.fadd.v8f32(float 0.000000e+00, <8 x float> [[TMP3]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[FOR_END:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_MOD_VF]], 4
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi float [ [[TMP4]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 1.500000e+01, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX3:%.*]] = phi float [ [[TMP6]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 1.000000e+01, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF4:%.*]] = and i64 [[N]], 3
; CHECK-NEXT:    [[N_VEC5:%.*]] = sub i64 [[N]], [[N_MOD_VF4]]
; CHECK-NEXT:    [[TMP8:%.*]] = insertelement <4 x float> splat (float 1.000000e+00), float [[BC_MERGE_RDX]], i64 0
; CHECK-NEXT:    [[TMP9:%.*]] = insertelement <4 x float> zeroinitializer, float [[BC_MERGE_RDX3]], i64 0
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX6:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT10:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI7:%.*]] = phi <4 x float> [ [[TMP8]], %[[VEC_EPILOG_PH]] ], [ [[TMP14:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI8:%.*]] = phi <4 x float> [ [[TMP9]], %[[VEC_EPILOG_PH]] ], [ [[TMP13:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP11:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDEX6]]
; CHECK-NEXT:    [[WIDE_LOAD9:%.*]] = load <4 x float>, ptr [[TMP11]], align 4
; CHECK-NEXT:    [[TMP13]] = fadd fast <4 x float> [[VEC_PHI8]], [[WIDE_LOAD9]]
; CHECK-NEXT:    [[TMP14]] = fmul fast <4 x float> [[VEC_PHI7]], [[WIDE_LOAD9]]
; CHECK-NEXT:    [[INDEX_NEXT10]] = add nuw i64 [[INDEX6]], 4
; CHECK-NEXT:    [[TMP15:%.*]] = icmp eq i64 [[INDEX_NEXT10]], [[N_VEC5]]
; CHECK-NEXT:    br i1 [[TMP15]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP13:![0-9]+]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP16:%.*]] = call fast float @llvm.vector.reduce.fmul.v4f32(float 1.000000e+00, <4 x float> [[TMP14]])
; CHECK-NEXT:    [[TMP17:%.*]] = call fast float @llvm.vector.reduce.fadd.v4f32(float 0.000000e+00, <4 x float> [[TMP13]])
; CHECK-NEXT:    [[CMP_N11:%.*]] = icmp eq i64 [[N]], [[N_VEC5]]
; CHECK-NEXT:    br i1 [[CMP_N11]], label %[[FOR_END]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC5]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX11:%.*]] = phi float [ [[TMP16]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP4]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 1.500000e+01, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX12:%.*]] = phi float [ [[TMP17]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP6]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 1.000000e+01, %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[PROD:%.*]] = phi float [ [[BC_MERGE_RDX11]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[MUL:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[SUM:%.*]] = phi float [ [[BC_MERGE_RDX12]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[ADD:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[IV]]
; CHECK-NEXT:    [[TMP18:%.*]] = load float, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[ADD]] = fadd fast float [[SUM]], [[TMP18]]
; CHECK-NEXT:    [[MUL]] = fmul fast float [[PROD]], [[TMP18]]
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label %[[FOR_END]], label %[[FOR_BODY]], !llvm.loop [[LOOP14:![0-9]+]]
; CHECK:       [[FOR_END]]:
; CHECK-NEXT:    [[ADD_LCSSA:%.*]] = phi float [ [[ADD]], %[[FOR_BODY]] ], [ [[TMP6]], %[[MIDDLE_BLOCK]] ], [ [[TMP17]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    [[MUL_LCSSA:%.*]] = phi float [ [[MUL]], %[[FOR_BODY]] ], [ [[TMP4]], %[[MIDDLE_BLOCK]] ], [ [[TMP16]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    [[DIV:%.*]] = fdiv float [[MUL_LCSSA]], [[ADD_LCSSA]]
; CHECK-NEXT:    ret float [[DIV]]
;
entry:
  br label %for.body

for.body:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
  %prod = phi float [ 15.000000e+00, %entry ], [ %mul, %for.body ]
  %sum = phi float [ 10.000000e+00, %entry ], [ %add, %for.body ]
  %arrayidx = getelementptr inbounds float, ptr %A, i64 %iv
  %0 = load float, ptr %arrayidx
  %add = fadd fast float %sum, %0
  %mul = fmul fast float %prod, %0
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond.not = icmp eq i64 %iv.next, %N
  br i1 %exitcond.not, label %for.end, label %for.body

for.end:
  %div = fdiv float %mul, %add
  ret float %div
}

;
; Start value of the reduction is a Phi node from the outer loop
;
define i32 @reduction_phi_start_val(ptr %A, i64 %N) {
; CHECK-LABEL: define i32 @reduction_phi_start_val(
; CHECK-SAME: ptr [[A:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br label %[[ITER_CHECK:.*]]
; CHECK:       [[ITER_CHECK]]:
; CHECK-NEXT:    [[OUTER_IV:%.*]] = phi i64 [ [[OUTER_IV_NEXT:%.*]], %[[FOR_COND:.*]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    [[START_SUM:%.*]] = phi i32 [ [[SUB_LCSSA:%.*]], %[[FOR_COND]] ], [ 5, %[[ENTRY]] ]
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[N]], 8
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i64 [[N]], 7
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; CHECK-NEXT:    [[TMP0:%.*]] = insertelement <8 x i32> zeroinitializer, i32 [[START_SUM]], i64 0
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI:%.*]] = phi <8 x i32> [ [[TMP0]], %[[VECTOR_PH]] ], [ [[TMP3:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <8 x i32>, ptr [[TMP2]], align 4
; CHECK-NEXT:    [[TMP3]] = sub <8 x i32> [[VEC_PHI]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP5]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP15:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP4:%.*]] = call i32 @llvm.vector.reduce.add.v8i32(<8 x i32> [[TMP3]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[FOR_COND]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_MOD_VF]], 4
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP4]], %[[VEC_EPILOG_ITER_CHECK]] ], [ [[START_SUM]], %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF2:%.*]] = and i64 [[N]], 3
; CHECK-NEXT:    [[N_VEC3:%.*]] = sub i64 [[N]], [[N_MOD_VF2]]
; CHECK-NEXT:    [[TMP7:%.*]] = insertelement <4 x i32> zeroinitializer, i32 [[BC_MERGE_RDX]], i64 0
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX4:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT7:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI5:%.*]] = phi <4 x i32> [ [[TMP7]], %[[VEC_EPILOG_PH]] ], [ [[TMP11:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX4]]
; CHECK-NEXT:    [[WIDE_LOAD6:%.*]] = load <4 x i32>, ptr [[TMP9]], align 4
; CHECK-NEXT:    [[TMP11]] = sub <4 x i32> [[VEC_PHI5]], [[WIDE_LOAD6]]
; CHECK-NEXT:    [[INDEX_NEXT7]] = add nuw i64 [[INDEX4]], 4
; CHECK-NEXT:    [[TMP12:%.*]] = icmp eq i64 [[INDEX_NEXT7]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[TMP12]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP16:![0-9]+]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP13:%.*]] = call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> [[TMP11]])
; CHECK-NEXT:    [[CMP_N8:%.*]] = icmp eq i64 [[N]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[CMP_N8]], label %[[FOR_COND]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC3]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX8:%.*]] = phi i32 [ [[TMP13]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP4]], %[[VEC_EPILOG_ITER_CHECK]] ], [ [[START_SUM]], %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[SUM:%.*]] = phi i32 [ [[BC_MERGE_RDX8]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[SUB:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[IV]]
; CHECK-NEXT:    [[LOAD:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[SUB]] = sub nsw i32 [[SUM]], [[LOAD]]
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label %[[FOR_COND]], label %[[FOR_BODY]], !llvm.loop [[LOOP17:![0-9]+]]
; CHECK:       [[FOR_COND]]:
; CHECK-NEXT:    [[SUB_LCSSA]] = phi i32 [ [[SUB]], %[[FOR_BODY]] ], [ [[TMP4]], %[[MIDDLE_BLOCK]] ], [ [[TMP13]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    [[OUTER_IV_NEXT]] = add nuw nsw i64 [[OUTER_IV]], 1
; CHECK-NEXT:    [[OUTER_EXITCOND_NOT:%.*]] = icmp eq i64 [[OUTER_IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[OUTER_EXITCOND_NOT]], label %[[FOR_END:.*]], label %[[ITER_CHECK]]
; CHECK:       [[FOR_END]]:
; CHECK-NEXT:    [[SUB_LCSSA_LCSSA:%.*]] = phi i32 [ [[SUB_LCSSA]], %[[FOR_COND]] ]
; CHECK-NEXT:    ret i32 [[SUB_LCSSA_LCSSA]]
;
entry:
  br label %for.cond.preheader

for.cond.preheader:
  %outer.iv = phi i64 [ %outer.iv.next, %for.cond ], [ 0, %entry ]
  %start.sum = phi i32 [ %sub, %for.cond ], [ 5, %entry ]
  br label %for.body

for.body:
  %iv = phi i64 [ 0, %for.cond.preheader ], [ %iv.next, %for.body ]
  %sum = phi i32 [ %start.sum, %for.cond.preheader ], [ %sub, %for.body ]
  %arrayidx = getelementptr inbounds i32, ptr %A, i64 %iv
  %load = load i32, ptr %arrayidx, align 4
  %sub = sub nsw i32 %sum, %load
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond.not = icmp eq i64 %iv.next, %N
  br i1 %exitcond.not, label %for.cond, label %for.body

for.cond:
  %outer.iv.next = add nuw nsw i64 %outer.iv, 1
  %outer.exitcond.not = icmp eq i64 %outer.iv.next, %N
  br i1 %outer.exitcond.not, label %for.end, label %for.cond.preheader

for.end:
  ret i32 %sub
}

define i64 @test_reduction_with_widen_induction_order_1(ptr %A, i64 %N) {
; CHECK-LABEL: define i64 @test_reduction_with_widen_induction_order_1(
; CHECK-SAME: ptr [[A:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ITER_CHECK:.*]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[N]], 8
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i64 [[N]], 7
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; 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:%.*]] = phi <8 x i64> [ <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI:%.*]] = phi <8 x i64> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP1:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <8 x i64>, ptr [[TMP0]], align 4
; CHECK-NEXT:    [[TMP1]] = add <8 x i64> [[VEC_PHI]], [[WIDE_LOAD]]
; CHECK-NEXT:    store <8 x i64> [[VEC_IND]], ptr [[TMP0]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add nuw nsw <8 x i64> [[VEC_IND]], splat (i64 8)
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP2]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP18:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP3:%.*]] = call i64 @llvm.vector.reduce.add.v8i64(<8 x i64> [[TMP1]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_MOD_VF]], 4
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i64 [ [[TMP3]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF2:%.*]] = and i64 [[N]], 3
; CHECK-NEXT:    [[N_VEC3:%.*]] = sub i64 [[N]], [[N_MOD_VF2]]
; CHECK-NEXT:    [[TMP4:%.*]] = insertelement <4 x i64> zeroinitializer, i64 [[BC_MERGE_RDX]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i64> poison, i64 [[BC_RESUME_VAL]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i64> [[BROADCAST_SPLATINSERT]], <4 x i64> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[INDUCTION:%.*]] = add nuw nsw <4 x i64> [[BROADCAST_SPLAT]], <i64 0, i64 1, i64 2, i64 3>
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX4:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT8:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND5:%.*]] = phi <4 x i64> [ [[INDUCTION]], %[[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT9:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI6:%.*]] = phi <4 x i64> [ [[TMP4]], %[[VEC_EPILOG_PH]] ], [ [[TMP6:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[INDEX4]]
; CHECK-NEXT:    [[WIDE_LOAD7:%.*]] = load <4 x i64>, ptr [[TMP5]], align 4
; CHECK-NEXT:    [[TMP6]] = add <4 x i64> [[VEC_PHI6]], [[WIDE_LOAD7]]
; CHECK-NEXT:    store <4 x i64> [[VEC_IND5]], ptr [[TMP5]], align 4
; CHECK-NEXT:    [[INDEX_NEXT8]] = add nuw i64 [[INDEX4]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT9]] = add nuw nsw <4 x i64> [[VEC_IND5]], splat (i64 4)
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i64 [[INDEX_NEXT8]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[TMP7]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP19:![0-9]+]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP8:%.*]] = call i64 @llvm.vector.reduce.add.v4i64(<4 x i64> [[TMP6]])
; CHECK-NEXT:    [[CMP_N10:%.*]] = icmp eq i64 [[N]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[CMP_N10]], label %[[EXIT]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL1:%.*]] = phi i64 [ [[N_VEC3]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX10:%.*]] = phi i64 [ [[TMP8]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP3]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[IV_1:%.*]] = phi i64 [ [[BC_RESUME_VAL1]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_1_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[RED:%.*]] = phi i64 [ [[BC_MERGE_RDX10]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[RED_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[GEP_A:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[IV_1]]
; CHECK-NEXT:    [[L:%.*]] = load i64, ptr [[GEP_A]], align 4
; CHECK-NEXT:    [[RED_NEXT]] = add i64 [[RED]], [[L]]
; CHECK-NEXT:    store i64 [[IV_1]], ptr [[GEP_A]], align 4
; CHECK-NEXT:    [[IV_1_NEXT]] = add nuw nsw i64 [[IV_1]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_1_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP20:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RED_NEXT_LCSSA:%.*]] = phi i64 [ [[RED_NEXT]], %[[LOOP]] ], [ [[TMP3]], %[[MIDDLE_BLOCK]] ], [ [[TMP8]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[RED_NEXT_LCSSA]]
;
entry:
  br label %loop

loop:
  %iv.1 = phi i64 [ 0, %entry ], [ %iv.1.next, %loop ]
  %red = phi i64 [ 0, %entry ], [ %red.next, %loop ]
  %gep.A = getelementptr inbounds i64, ptr %A, i64 %iv.1
  %l = load i64, ptr %gep.A
  %red.next = add i64 %red, %l
  store i64 %iv.1, ptr %gep.A, align 4
  %iv.1.next = add nuw nsw i64 %iv.1, 1
  %exitcond = icmp eq i64 %iv.1.next, %N
  br i1 %exitcond, label %exit, label %loop

exit:
  ret i64 %red.next
}

; Same as @test_reduction_with_widen_induction_order_1, but with phi order flipped.
define i64 @test_reduction_with_widen_induction_order_2(ptr %A, i64 %N) {
; CHECK-LABEL: define i64 @test_reduction_with_widen_induction_order_2(
; CHECK-SAME: ptr [[A:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ITER_CHECK:.*]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[N]], 8
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i64 [[N]], 7
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI:%.*]] = phi <8 x i64> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP1:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <8 x i64> [ <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <8 x i64>, ptr [[TMP0]], align 4
; CHECK-NEXT:    [[TMP1]] = add <8 x i64> [[VEC_PHI]], [[WIDE_LOAD]]
; CHECK-NEXT:    store <8 x i64> [[VEC_IND]], ptr [[TMP0]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add nuw nsw <8 x i64> [[VEC_IND]], splat (i64 8)
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP2]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP21:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP3:%.*]] = call i64 @llvm.vector.reduce.add.v8i64(<8 x i64> [[TMP1]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_MOD_VF]], 4
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i64 [ [[TMP3]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF2:%.*]] = and i64 [[N]], 3
; CHECK-NEXT:    [[N_VEC3:%.*]] = sub i64 [[N]], [[N_MOD_VF2]]
; CHECK-NEXT:    [[TMP4:%.*]] = insertelement <4 x i64> zeroinitializer, i64 [[BC_MERGE_RDX]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i64> poison, i64 [[BC_RESUME_VAL]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i64> [[BROADCAST_SPLATINSERT]], <4 x i64> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[INDUCTION:%.*]] = add nuw nsw <4 x i64> [[BROADCAST_SPLAT]], <i64 0, i64 1, i64 2, i64 3>
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX4:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT8:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_PHI5:%.*]] = phi <4 x i64> [ [[TMP4]], %[[VEC_EPILOG_PH]] ], [ [[TMP6:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND6:%.*]] = phi <4 x i64> [ [[INDUCTION]], %[[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT9:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[INDEX4]]
; CHECK-NEXT:    [[WIDE_LOAD7:%.*]] = load <4 x i64>, ptr [[TMP5]], align 4
; CHECK-NEXT:    [[TMP6]] = add <4 x i64> [[VEC_PHI5]], [[WIDE_LOAD7]]
; CHECK-NEXT:    store <4 x i64> [[VEC_IND6]], ptr [[TMP5]], align 4
; CHECK-NEXT:    [[INDEX_NEXT8]] = add nuw i64 [[INDEX4]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT9]] = add nuw nsw <4 x i64> [[VEC_IND6]], splat (i64 4)
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i64 [[INDEX_NEXT8]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[TMP7]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP22:![0-9]+]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP8:%.*]] = call i64 @llvm.vector.reduce.add.v4i64(<4 x i64> [[TMP6]])
; CHECK-NEXT:    [[CMP_N10:%.*]] = icmp eq i64 [[N]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[CMP_N10]], label %[[EXIT]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[BC_MERGE_RDX10:%.*]] = phi i64 [ [[TMP8]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP3]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL1:%.*]] = phi i64 [ [[N_VEC3]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[RED:%.*]] = phi i64 [ [[BC_MERGE_RDX10]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[RED_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[IV_1:%.*]] = phi i64 [ [[BC_RESUME_VAL1]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_1_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[GEP_A:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[IV_1]]
; CHECK-NEXT:    [[L:%.*]] = load i64, ptr [[GEP_A]], align 4
; CHECK-NEXT:    [[RED_NEXT]] = add i64 [[RED]], [[L]]
; CHECK-NEXT:    store i64 [[IV_1]], ptr [[GEP_A]], align 4
; CHECK-NEXT:    [[IV_1_NEXT]] = add nuw nsw i64 [[IV_1]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_1_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP23:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RED_NEXT_LCSSA:%.*]] = phi i64 [ [[RED_NEXT]], %[[LOOP]] ], [ [[TMP3]], %[[MIDDLE_BLOCK]] ], [ [[TMP8]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[RED_NEXT_LCSSA]]
;
entry:
  br label %loop

loop:
  %red = phi i64 [ 0, %entry ], [ %red.next, %loop ]
  %iv.1 = phi i64 [ 0, %entry ], [ %iv.1.next, %loop ]
  %gep.A = getelementptr inbounds i64, ptr %A, i64 %iv.1
  %l = load i64, ptr %gep.A
  %red.next = add i64 %red, %l
  store i64 %iv.1, ptr %gep.A, align 4
  %iv.1.next = add nuw nsw i64 %iv.1, 1
  %exitcond = icmp eq i64 %iv.1.next, %N
  br i1 %exitcond, label %exit, label %loop

exit:
  ret i64 %red.next
}

define i1 @reduction_with_const_or(ptr %A, i8 %n) {
; CHECK-LABEL: define i1 @reduction_with_const_or(
; CHECK-SAME: ptr [[A:%.*]], i8 [[N:%.*]]) {
; CHECK-NEXT:  [[ITER_CHECK:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = zext i8 [[N]] to i32
; CHECK-NEXT:    [[TMP1:%.*]] = add nuw nsw i32 [[TMP0]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP1]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK1:%.*]] = icmp ult i32 [[TMP1]], 8
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i32 [[TMP1]], 7
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[TMP1]], [[N_MOD_VF]]
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i32 [[N_VEC]] to i8
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <8 x i8> [ <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = zext <8 x i8> [[VEC_IND]] to <8 x i64>
; CHECK-NEXT:    [[TMP4:%.*]] = extractelement <8 x i64> [[TMP3]], i64 0
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP4]]
; CHECK-NEXT:    store <8 x i64> [[TMP3]], ptr [[TMP5]], align 8
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 8
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <8 x i8> [[VEC_IND]], splat (i8 8)
; CHECK-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP6]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP24:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[TMP1]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i32 [[N_MOD_VF]], 4
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i8 [ [[TMP2]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF2:%.*]] = and i32 [[TMP1]], 3
; CHECK-NEXT:    [[N_VEC3:%.*]] = sub i32 [[TMP1]], [[N_MOD_VF2]]
; CHECK-NEXT:    [[TMP8:%.*]] = trunc i32 [[N_VEC3]] to i8
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i8> poison, i8 [[BC_RESUME_VAL]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i8> [[BROADCAST_SPLATINSERT]], <4 x i8> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[INDUCTION:%.*]] = add <4 x i8> [[BROADCAST_SPLAT]], <i8 0, i8 1, i8 2, i8 3>
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX4:%.*]] = phi i32 [ [[VEC_EPILOG_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT6:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND5:%.*]] = phi <4 x i8> [ [[INDUCTION]], %[[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT7:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP9:%.*]] = zext <4 x i8> [[VEC_IND5]] to <4 x i64>
; CHECK-NEXT:    [[TMP10:%.*]] = extractelement <4 x i64> [[TMP9]], i64 0
; CHECK-NEXT:    [[TMP11:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP10]]
; CHECK-NEXT:    store <4 x i64> [[TMP9]], ptr [[TMP11]], align 8
; CHECK-NEXT:    [[INDEX_NEXT6]] = add nuw i32 [[INDEX4]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT7]] = add <4 x i8> [[VEC_IND5]], splat (i8 4)
; CHECK-NEXT:    [[TMP12:%.*]] = icmp eq i32 [[INDEX_NEXT6]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[TMP12]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP25:![0-9]+]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N8:%.*]] = icmp eq i32 [[TMP1]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[CMP_N8]], label %[[EXIT]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[TMP15:%.*]] = phi i1 [ true, %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ true, %[[VEC_EPILOG_ITER_CHECK]] ], [ false, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[TMP16:%.*]] = phi i8 [ [[TMP8]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP2]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[OR_RED:%.*]] = phi i1 [ [[TMP15]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[OR_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i8 [ [[TMP16]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[IV_EXT:%.*]] = zext i8 [[IV]] to i64
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[IV_EXT]]
; CHECK-NEXT:    store i64 [[IV_EXT]], ptr [[GEP]], align 8
; CHECK-NEXT:    [[OR_NEXT]] = or i1 [[OR_RED]], true
; CHECK-NEXT:    [[IV_NEXT]] = add i8 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i8 [[IV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP26:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[OR_NEXT_LCSSA:%.*]] = phi i1 [ [[OR_NEXT]], %[[LOOP]] ], [ true, %[[MIDDLE_BLOCK]] ], [ true, %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i1 [[OR_NEXT_LCSSA]]
;
entry:
  br label %loop

loop:
  %or.red = phi i1 [ false, %entry ], [ %or.next, %loop ]
  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
  %iv.ext = zext i8 %iv to i64
  %gep = getelementptr inbounds i64, ptr %A, i64 %iv.ext
  store i64 %iv.ext, ptr %gep, align 8
  %or.next = or i1 %or.red, true
  %iv.next = add i8 %iv, 1
  %exitcond = icmp eq i8 %iv, %n
  br i1 %exitcond, label %exit, label %loop

exit:
  ret i1 %or.next
}

define i16 @test_no_op_or_reduction_single_vector_iteration(i64 %N) {
; CHECK-LABEL: define i16 @test_no_op_or_reduction_single_vector_iteration(
; CHECK-SAME: i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ITER_CHECK:.*]]:
; CHECK-NEXT:    [[CLAMPED:%.*]] = call i64 @llvm.umin.i64(i64 [[N]], i64 4)
; CHECK-NEXT:    [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[CLAMPED]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    br i1 true, label %[[VEC_EPILOG_PH1:.*]], label %[[VECTOR_PH1:.*]]
; CHECK:       [[VECTOR_PH1]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i64 [[CLAMPED]], 7
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[CLAMPED]], [[N_MOD_VF]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK:.*]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[CLAMPED]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[CLAMPED]], 4
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_PH]], label %[[VEC_EPILOG_PH1]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH1]]:
; CHECK-NEXT:    [[N_MOD_VF2:%.*]] = and i64 [[CLAMPED]], 3
; CHECK-NEXT:    [[N_VEC3:%.*]] = sub i64 [[CLAMPED]], [[N_MOD_VF2]]
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    br label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N5:%.*]] = icmp eq i64 [[CLAMPED]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[CMP_N5]], label %[[EXIT]], label %[[VEC_EPILOG_PH]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC3]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX3:%.*]] = phi i16 [ 0, %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ 0, %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[RED:%.*]] = phi i16 [ [[BC_MERGE_RDX3]], %[[VEC_EPILOG_PH]] ], [ [[RED_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[RED_NEXT]] = or i16 [[RED]], 0
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], [[CLAMPED]]
; CHECK-NEXT:    br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP27:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RED_NEXT_LCSSA:%.*]] = phi i16 [ [[RED_NEXT]], %[[LOOP]] ], [ 0, %[[MIDDLE_BLOCK]] ], [ 0, %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i16 [[RED_NEXT_LCSSA]]
;
entry:
  %clamped = call i64 @llvm.umin.i64(i64 %N, i64 4)
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %red = phi i16 [ 0, %entry ], [ %red.next, %loop ]
  %red.next = or i16 %red, 0
  %iv.next = add i64 %iv, 1
  %ec = icmp eq i64 %iv.next, %clamped
  br i1 %ec, label %exit, label %loop

exit:
  ret i16 %red.next
}

; Test or-reduction with an induction-derived operand and a small bounded trip
; count. The main vector loop is dissolved (trip count <= VF), and the epilogue
; vector loop's reduction body remains with a ReductionStartVector operand.
define i16 @test_or_reduction_with_induction_single_vector_iteration(i64 %N) {
; CHECK-LABEL: define i16 @test_or_reduction_with_induction_single_vector_iteration(
; CHECK-SAME: i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ITER_CHECK:.*]]:
; CHECK-NEXT:    [[CLAMPED:%.*]] = call i64 @llvm.umin.i64(i64 [[N]], i64 4)
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[CLAMPED]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT:    br i1 true, label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i64 [[CLAMPED]], 7
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[CLAMPED]], [[N_MOD_VF]]
; CHECK-NEXT:    [[TMP0:%.*]] = trunc i64 [[N_VEC]] to i32
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK:.*]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP1:%.*]] = call i16 @llvm.vector.reduce.or.v8i16(<8 x i16> <i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7>)
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[CLAMPED]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[CLAMPED]], 4
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i32 [ [[TMP0]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i16 [ [[TMP1]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF2:%.*]] = and i64 [[CLAMPED]], 3
; CHECK-NEXT:    [[N_VEC3:%.*]] = sub i64 [[CLAMPED]], [[N_MOD_VF2]]
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i64 [[N_VEC3]] to i32
; CHECK-NEXT:    [[TMP3:%.*]] = insertelement <4 x i16> zeroinitializer, i16 [[BC_MERGE_RDX]], i64 0
; CHECK-NEXT:    [[TMP4:%.*]] = trunc i32 [[BC_RESUME_VAL]] to i16
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i16> poison, i16 [[TMP4]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i16> [[BROADCAST_SPLATINSERT]], <4 x i16> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[INDUCTION:%.*]] = add <4 x i16> [[BROADCAST_SPLAT]], <i16 0, i16 1, i16 2, i16 3>
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[TMP5:%.*]] = or <4 x i16> [[TMP3]], [[INDUCTION]]
; CHECK-NEXT:    br label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP6:%.*]] = call i16 @llvm.vector.reduce.or.v4i16(<4 x i16> [[TMP5]])
; CHECK-NEXT:    [[CMP_N4:%.*]] = icmp eq i64 [[CLAMPED]], [[N_VEC3]]
; CHECK-NEXT:    br i1 [[CMP_N4]], label %[[EXIT]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL3:%.*]] = phi i64 [ [[N_VEC3]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL4:%.*]] = phi i32 [ [[TMP2]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP0]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX5:%.*]] = phi i16 [ [[TMP6]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP1]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL3]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[SHIFT:%.*]] = phi i32 [ [[BC_RESUME_VAL4]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[SHIFT_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[RED:%.*]] = phi i16 [ [[BC_MERGE_RDX5]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[RED_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[TRUNC:%.*]] = trunc i32 [[SHIFT]] to i16
; CHECK-NEXT:    [[RED_NEXT]] = or i16 [[RED]], [[TRUNC]]
; CHECK-NEXT:    [[SHIFT_NEXT]] = add i32 [[SHIFT]], 1
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], [[CLAMPED]]
; CHECK-NEXT:    br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP28:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RED_NEXT_LCSSA:%.*]] = phi i16 [ [[RED_NEXT]], %[[LOOP]] ], [ [[TMP1]], %[[MIDDLE_BLOCK]] ], [ [[TMP6]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i16 [[RED_NEXT_LCSSA]]
;
entry:
  %clamped = call i64 @llvm.umin.i64(i64 %N, i64 4)
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %shift = phi i32 [ 0, %entry ], [ %shift.next, %loop ]
  %red = phi i16 [ 0, %entry ], [ %red.next, %loop ]
  %trunc = trunc i32 %shift to i16
  %red.next = or i16 %red, %trunc
  %shift.next = add i32 %shift, 1
  %iv.next = add i64 %iv, 1
  %ec = icmp eq i64 %iv.next, %clamped
  br i1 %ec, label %exit, label %loop

exit:
  ret i16 %red.next
}

; Test AnyOf reduction in epilogue with a small trip count that results in
; the epilogue vector loop being dissolved (single iteration).
define i32 @anyof_reduction_in_dissolved_epilogue(i32 %val, i1 %c) {
; CHECK-LABEL: define i32 @anyof_reduction_in_dissolved_epilogue(
; CHECK-SAME: i32 [[VAL:%.*]], i1 [[C:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[START:%.*]] = sext i1 [[C]] to i32
; CHECK-NEXT:    [[TMP0:%.*]] = zext i1 [[C]] to i32
; CHECK-NEXT:    [[TMP1:%.*]] = sub i32 [[TMP0]], [[START]]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK:.*]]:
; CHECK-NEXT:    [[SEL_LCSSA:%.*]] = phi i32 [ [[SEL:%.*]], %[[LOOP2:.*]] ], [ [[RDX_SELECT:%.*]], %[[MIDDLE_BLOCK:.*]] ], [ [[RDX_SELECT7:%.*]], %[[VEC_EPILOG_MIDDLE_BLOCK1:.*]] ]
; CHECK-NEXT:    br label %[[LOOP]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[OUTER_IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[SEL_LCSSA]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br i1 true, label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT:    br i1 true, label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i32 [[TMP1]], 7
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[TMP1]], [[N_MOD_VF]]
; CHECK-NEXT:    [[TMP2:%.*]] = add i32 [[START]], [[N_VEC]]
; CHECK-NEXT:    [[TMP3:%.*]] = icmp ne i32 [[VAL]], 0
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <8 x i1> poison, i1 [[TMP3]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <8 x i1> [[BROADCAST_SPLATINSERT]], <8 x i1> poison, <8 x i32> zeroinitializer
; CHECK-NEXT:    br label %[[LOOP1:.*]]
; CHECK:       [[LOOP1]]:
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP4:%.*]] = call i1 @llvm.vector.reduce.or.v8i1(<8 x i1> [[BROADCAST_SPLAT]])
; CHECK-NEXT:    [[TMP5:%.*]] = freeze i1 [[TMP4]]
; CHECK-NEXT:    [[RDX_SELECT]] = select i1 [[TMP5]], i32 [[OUTER_IV]], i32 0
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[TMP1]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[VEC_EPILOG_MIDDLE_BLOCK]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i32 [[N_MOD_VF]], 4
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[RDX_SELECT]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[TMP6:%.*]] = icmp ne i32 [[BC_MERGE_RDX]], 0
; CHECK-NEXT:    [[N_MOD_VF1:%.*]] = and i32 [[TMP1]], 3
; CHECK-NEXT:    [[N_VEC2:%.*]] = sub i32 [[TMP1]], [[N_MOD_VF1]]
; CHECK-NEXT:    [[TMP7:%.*]] = add i32 [[START]], [[N_VEC2]]
; CHECK-NEXT:    [[TMP8:%.*]] = icmp ne i32 [[VAL]], 0
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT5:%.*]] = insertelement <4 x i1> poison, i1 [[TMP8]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT6:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT5]], <4 x i1> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT3:%.*]] = insertelement <4 x i1> poison, i1 [[TMP6]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT4:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT3]], <4 x i1> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[TMP9:%.*]] = or <4 x i1> [[BROADCAST_SPLAT4]], [[BROADCAST_SPLAT6]]
; CHECK-NEXT:    br label %[[VEC_EPILOG_MIDDLE_BLOCK1]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK1]]:
; CHECK-NEXT:    [[TMP10:%.*]] = call i1 @llvm.vector.reduce.or.v4i1(<4 x i1> [[TMP9]])
; CHECK-NEXT:    [[TMP11:%.*]] = freeze i1 [[TMP10]]
; CHECK-NEXT:    [[RDX_SELECT7]] = select i1 [[TMP11]], i32 [[OUTER_IV]], i32 0
; CHECK-NEXT:    [[CMP_N8:%.*]] = icmp eq i32 [[TMP1]], [[N_VEC2]]
; CHECK-NEXT:    br i1 [[CMP_N8]], label %[[VEC_EPILOG_MIDDLE_BLOCK]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL8:%.*]] = phi i32 [ [[TMP7]], %[[VEC_EPILOG_MIDDLE_BLOCK1]] ], [ [[TMP2]], %[[VEC_EPILOG_ITER_CHECK]] ], [ [[START]], %[[LOOP]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX9:%.*]] = phi i32 [ [[RDX_SELECT7]], %[[VEC_EPILOG_MIDDLE_BLOCK1]] ], [ [[RDX_SELECT]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[LOOP]] ]
; CHECK-NEXT:    br label %[[LOOP2]]
; CHECK:       [[LOOP2]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ [[BC_RESUME_VAL8]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP2]] ]
; CHECK-NEXT:    [[RDX:%.*]] = phi i32 [ [[BC_MERGE_RDX9]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[SEL]], %[[LOOP2]] ]
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[VAL]], 0
; CHECK-NEXT:    [[SEL]] = select i1 [[CMP]], i32 [[RDX]], i32 [[OUTER_IV]]
; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], 1
; CHECK-NEXT:    [[TC:%.*]] = zext i1 [[C]] to i32
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32 [[IV_NEXT]], [[TC]]
; CHECK-NEXT:    br i1 [[EC]], label %[[VEC_EPILOG_MIDDLE_BLOCK]], label %[[LOOP2]], !llvm.loop [[LOOP29:![0-9]+]]
;
entry:
  %start = sext i1 %c to i32
  br label %outer.header

outer.header:
  %outer.iv = phi i32 [ 0, %entry ], [ %sel, %loop ]
  br label %loop

loop:
  %iv = phi i32 [ %start, %outer.header ], [ %iv.next, %loop ]
  %rdx = phi i32 [ 0, %outer.header ], [ %sel, %loop ]
  %cmp = icmp eq i32 %val, 0
  %sel = select i1 %cmp, i32 %rdx, i32 %outer.iv
  %iv.next = add i32 %iv, 1
  %tc = zext i1 %c to i32
  %ec = icmp eq i32 %iv.next, %tc
  br i1 %ec, label %outer.header, label %loop

  uselistorder i32 %sel, { 1, 0 }
}

; Test case for a crash during epilogue vectorization with a reduction and a
; pointer induction with an exit condition based on inttoptr.
define i64 @reduction_with_ptr_iv_inttoptr_exit_cond(ptr %base, ptr %src) {
; CHECK-LABEL: define i64 @reduction_with_ptr_iv_inttoptr_exit_cond(
; CHECK-SAME: ptr [[BASE:%.*]], ptr [[SRC:%.*]]) {
; CHECK-NEXT:  [[ITER_CHECK:.*]]:
; CHECK-NEXT:    [[PTRTOINT:%.*]] = ptrtoint ptr [[BASE]] to i64
; CHECK-NEXT:    [[ADD:%.*]] = add i64 [[PTRTOINT]], 120
; CHECK-NEXT:    [[END:%.*]] = inttoptr i64 [[ADD]] to ptr
; CHECK-NEXT:    [[START:%.*]] = getelementptr i8, ptr [[BASE]], i64 24
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[ADD]], -48
; CHECK-NEXT:    br i1 false, label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_SCEVCHECK:.*]]
; CHECK:       [[VECTOR_SCEVCHECK]]:
; CHECK-NEXT:    br i1 true, label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP24:%.*]] = getelementptr i8, ptr [[START]], i64 0
; CHECK-NEXT:    [[TMP10:%.*]] = load i8, ptr [[SRC]], align 1
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <8 x i8> poison, i8 [[TMP10]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <8 x i8> [[BROADCAST_SPLATINSERT]], <8 x i8> poison, <8 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP25:%.*]] = zext <8 x i8> [[BROADCAST_SPLAT]] to <8 x 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_PHI:%.*]] = phi <8 x i64> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP14:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP11:%.*]] = add <8 x i64> [[VEC_PHI]], splat (i64 1)
; CHECK-NEXT:    [[TMP14]] = add <8 x i64> [[TMP11]], [[TMP25]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
; CHECK-NEXT:    [[TMP13:%.*]] = icmp eq i64 [[INDEX_NEXT]], 0
; CHECK-NEXT:    br i1 [[TMP13]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP30:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP26:%.*]] = call i64 @llvm.vector.reduce.add.v8i64(<8 x i64> [[TMP14]])
; CHECK-NEXT:    br i1 false, label %[[EXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    br i1 false, label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i64 [ [[TMP26]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_SCEVCHECK]] ]
; CHECK-NEXT:    [[TMP17:%.*]] = getelementptr i8, ptr [[START]], i64 96
; CHECK-NEXT:    [[TMP18:%.*]] = insertelement <4 x i64> zeroinitializer, i64 [[BC_MERGE_RDX]], i64 0
; CHECK-NEXT:    [[TMP20:%.*]] = load i8, ptr [[SRC]], align 1
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT4:%.*]] = insertelement <4 x i8> poison, i8 [[TMP20]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT5:%.*]] = shufflevector <4 x i8> [[BROADCAST_SPLATINSERT4]], <4 x i8> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP21:%.*]] = zext <4 x i8> [[BROADCAST_SPLAT5]] to <4 x i64>
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[TMP19:%.*]] = add <4 x i64> [[TMP18]], splat (i64 1)
; CHECK-NEXT:    [[TMP22:%.*]] = add <4 x i64> [[TMP19]], [[TMP21]]
; CHECK-NEXT:    br label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP23:%.*]] = call i64 @llvm.vector.reduce.add.v4i64(<4 x i64> [[TMP22]])
; CHECK-NEXT:    br i1 true, label %[[EXIT]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL3:%.*]] = phi ptr [ [[TMP17]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP24]], %[[VEC_EPILOG_ITER_CHECK]] ], [ [[START]], %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX4:%.*]] = phi i64 [ [[TMP23]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[TMP26]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[IV_PTR:%.*]] = phi ptr [ [[BC_RESUME_VAL3]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_PTR_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[SUM:%.*]] = phi i64 [ [[BC_MERGE_RDX4]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[SUM_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[SUM_INC:%.*]] = add i64 [[SUM]], 1
; CHECK-NEXT:    [[LOAD_VAL:%.*]] = load i8, ptr [[SRC]], align 1
; CHECK-NEXT:    [[EXT:%.*]] = zext i8 [[LOAD_VAL]] to i64
; CHECK-NEXT:    [[SUM_NEXT]] = add i64 [[SUM_INC]], [[EXT]]
; CHECK-NEXT:    [[IV_PTR_NEXT]] = getelementptr i8, ptr [[IV_PTR]], i64 24
; CHECK-NEXT:    [[EXIT_COND:%.*]] = icmp eq ptr [[IV_PTR_NEXT]], [[END]]
; CHECK-NEXT:    br i1 [[EXIT_COND]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP31:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[SUM_NEXT_LCSSA:%.*]] = phi i64 [ [[SUM_NEXT]], %[[LOOP]] ], [ [[TMP26]], %[[MIDDLE_BLOCK]] ], [ [[TMP23]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[SUM_NEXT_LCSSA]]
;
entry:
  %ptrtoint = ptrtoint ptr %base to i64
  %add = add i64 %ptrtoint, 120
  %end = inttoptr i64 %add to ptr
  %start = getelementptr i8, ptr %base, i64 24
  br label %loop

loop:
  %iv.ptr = phi ptr [ %start, %entry ], [ %iv.ptr.next, %loop ]
  %sum = phi i64 [ 0, %entry ], [ %sum.next, %loop ]
  %sum.inc = add i64 %sum, 1
  %load.val = load i8, ptr %src, align 1
  %ext = zext i8 %load.val to i64
  %sum.next = add i64 %sum.inc, %ext
  %iv.ptr.next = getelementptr i8, ptr %iv.ptr, i64 24
  %exit.cond = icmp eq ptr %iv.ptr.next, %end
  br i1 %exit.cond, label %exit, label %loop

exit:
  ret i64 %sum.next
}

; Test case for https://github.com/llvm/llvm-project/issues/179407.
define i32 @test_foldable_reduction(i64 %N) {
; CHECK-LABEL: define i32 @test_foldable_reduction(
; CHECK-SAME: i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ITER_CHECK:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[N]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP0]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; CHECK:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[TMP0]], 8
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = and i64 [[TMP0]], 7
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 8
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP1]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP32:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; CHECK:       [[VEC_EPILOG_ITER_CHECK]]:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_MOD_VF]], 4
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[VEC_EPILOG_SCALAR_PH]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; CHECK:       [[VEC_EPILOG_PH]]:
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF3:%.*]] = and i64 [[TMP0]], 3
; CHECK-NEXT:    [[N_VEC4:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF3]]
; CHECK-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; CHECK:       [[VEC_EPILOG_VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX5:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT7:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[INDEX_NEXT7]] = add nuw i64 [[INDEX5]], 4
; CHECK-NEXT:    [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT7]], [[N_VEC4]]
; CHECK-NEXT:    br i1 [[TMP6]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP33:![0-9]+]]
; CHECK:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N9:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC4]]
; CHECK-NEXT:    br i1 [[CMP_N9]], label %[[EXIT]], label %[[VEC_EPILOG_SCALAR_PH]]
; CHECK:       [[VEC_EPILOG_SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC4]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX7:%.*]] = phi i32 [ 0, %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ 0, %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX8:%.*]] = phi i32 [ 0, %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ 0, %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[RED_1:%.*]] = phi i32 [ [[BC_MERGE_RDX7]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[RED_1_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[RED_2:%.*]] = phi i32 [ [[BC_MERGE_RDX8]], %[[VEC_EPILOG_SCALAR_PH]] ], [ [[RED_2_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[ICMP:%.*]] = icmp eq i32 0, 0
; CHECK-NEXT:    [[RED_2_NEXT]] = select i1 [[ICMP]], i32 0, i32 [[RED_2]]
; CHECK-NEXT:    [[RED_1_NEXT]] = or i32 [[RED_1]], 0
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp ne i64 [[IV]], [[N]]
; CHECK-NEXT:    br i1 [[EC]], label %[[LOOP]], label %[[EXIT]], !llvm.loop [[LOOP34:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[R_1:%.*]] = phi i32 [ [[RED_2_NEXT]], %[[LOOP]] ], [ 0, %[[MIDDLE_BLOCK]] ], [ 0, %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    [[R_2:%.*]] = phi i32 [ [[RED_1_NEXT]], %[[LOOP]] ], [ 0, %[[MIDDLE_BLOCK]] ], [ 0, %[[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    [[R:%.*]] = add i32 [[R_1]], [[R_2]]
; CHECK-NEXT:    ret i32 [[R]]
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %red.1 = phi i32 [ 0, %entry ], [ %red.1.next, %loop ]
  %red.2 = phi i32 [ 0, %entry ], [ %red.2.next, %loop ]
  %icmp = icmp eq i32 0, 0
  %red.2.next = select i1 %icmp, i32 0, i32 %red.2
  %red.1.next= or i32 %red.1, 0
  %iv.next = add i64 %iv, 1
  %ec = icmp ne i64 %iv, %N
  br i1 %ec, label %loop, label %exit

exit:
  %r.1 = phi i32 [ %red.2.next, %loop ]
  %r.2 = phi i32 [ %red.1.next, %loop ]
  %r = add i32 %r.1, %r.2
  ret i32 %r
}