; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
; RUN: opt < %s -passes=loop-vectorize,dce,instcombine -force-vector-interleave=1 -force-vector-width=4 -S | FileCheck %s

define i32 @reduction_sum(i32 %n, ptr %A, ptr %B) {
; CHECK-LABEL: define i32 @reduction_sum(
; CHECK-SAME: i32 [[N:%.*]], ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[TMP1]], label [[DOTLR_PH_PREHEADER:%.*]], label [[DOT_CRIT_EDGE:%.*]]
; CHECK:       .lr.ph.preheader:
; CHECK-NEXT:    [[TMP2:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[TMP2]], 2147483644
; 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 <4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP7:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP3]], align 4
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD1:%.*]] = load <4 x i32>, ptr [[TMP4]], align 4
; CHECK-NEXT:    [[TMP5:%.*]] = add <4 x i32> [[VEC_PHI]], [[VEC_IND]]
; CHECK-NEXT:    [[TMP6:%.*]] = add <4 x i32> [[TMP5]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP7]] = add <4 x i32> [[TMP6]], [[WIDE_LOAD1]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <4 x i32> [[VEC_IND]], <i32 4, i32 4, i32 4, i32 4>
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP9:%.*]] = call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> [[TMP7]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[TMP2]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[DOT_CRIT_EDGE_LOOPEXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[DOTLR_PH_PREHEADER]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP9]], [[MIDDLE_BLOCK]] ], [ 0, [[DOTLR_PH_PREHEADER]] ]
; CHECK-NEXT:    br label [[DOTLR_PH:%.*]]
; CHECK:       .lr.ph:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[DOTLR_PH]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[SUM_02:%.*]] = phi i32 [ [[TMP17:%.*]], [[DOTLR_PH]] ], [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP11:%.*]] = load i32, ptr [[TMP10]], align 4
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP13:%.*]] = load i32, ptr [[TMP12]], align 4
; CHECK-NEXT:    [[TMP14:%.*]] = trunc i64 [[INDVARS_IV]] to i32
; CHECK-NEXT:    [[TMP15:%.*]] = add i32 [[SUM_02]], [[TMP14]]
; CHECK-NEXT:    [[TMP16:%.*]] = add i32 [[TMP15]], [[TMP11]]
; CHECK-NEXT:    [[TMP17]] = add i32 [[TMP16]], [[TMP13]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[DOT_CRIT_EDGE_LOOPEXIT]], label [[DOTLR_PH]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       ._crit_edge.loopexit:
; CHECK-NEXT:    [[DOTLCSSA:%.*]] = phi i32 [ [[TMP17]], [[DOTLR_PH]] ], [ [[TMP9]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[DOT_CRIT_EDGE]]
; CHECK:       ._crit_edge:
; CHECK-NEXT:    [[SUM_0_LCSSA:%.*]] = phi i32 [ 0, [[TMP0:%.*]] ], [ [[DOTLCSSA]], [[DOT_CRIT_EDGE_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[SUM_0_LCSSA]]
;
  %1 = icmp sgt i32 %n, 0
  br i1 %1, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %sum.02 = phi i32 [ %9, %.lr.ph ], [ 0, %0 ]
  %2 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %3 = load i32, ptr %2, align 4
  %4 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
  %5 = load i32, ptr %4, align 4
  %6 = trunc i64 %indvars.iv to i32
  %7 = add i32 %sum.02, %6
  %8 = add i32 %7, %3
  %9 = add i32 %8, %5
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %0
  %sum.0.lcssa = phi i32 [ 0, %0 ], [ %9, %.lr.ph ]
  ret i32 %sum.0.lcssa
}

define i32 @reduction_prod(i32 %n, ptr %A, ptr %B) {
; CHECK-LABEL: define i32 @reduction_prod(
; CHECK-SAME: i32 [[N:%.*]], ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[TMP1]], label [[DOTLR_PH_PREHEADER:%.*]], label [[DOT_CRIT_EDGE:%.*]]
; CHECK:       .lr.ph.preheader:
; CHECK-NEXT:    [[TMP2:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[TMP2]], 2147483644
; 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 <4 x i32> [ <i32 1, i32 1, i32 1, i32 1>, [[VECTOR_PH]] ], [ [[TMP7:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP3]], align 4
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD1:%.*]] = load <4 x i32>, ptr [[TMP4]], align 4
; CHECK-NEXT:    [[TMP5:%.*]] = mul <4 x i32> [[VEC_PHI]], [[VEC_IND]]
; CHECK-NEXT:    [[TMP6:%.*]] = mul <4 x i32> [[TMP5]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP7]] = mul <4 x i32> [[TMP6]], [[WIDE_LOAD1]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <4 x i32> [[VEC_IND]], <i32 4, i32 4, i32 4, i32 4>
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP9:%.*]] = call i32 @llvm.vector.reduce.mul.v4i32(<4 x i32> [[TMP7]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[TMP2]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[DOT_CRIT_EDGE_LOOPEXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[DOTLR_PH_PREHEADER]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP9]], [[MIDDLE_BLOCK]] ], [ 1, [[DOTLR_PH_PREHEADER]] ]
; CHECK-NEXT:    br label [[DOTLR_PH:%.*]]
; CHECK:       .lr.ph:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[DOTLR_PH]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[PROD_02:%.*]] = phi i32 [ [[TMP17:%.*]], [[DOTLR_PH]] ], [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP11:%.*]] = load i32, ptr [[TMP10]], align 4
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP13:%.*]] = load i32, ptr [[TMP12]], align 4
; CHECK-NEXT:    [[TMP14:%.*]] = trunc i64 [[INDVARS_IV]] to i32
; CHECK-NEXT:    [[TMP15:%.*]] = mul i32 [[PROD_02]], [[TMP14]]
; CHECK-NEXT:    [[TMP16:%.*]] = mul i32 [[TMP15]], [[TMP11]]
; CHECK-NEXT:    [[TMP17]] = mul i32 [[TMP16]], [[TMP13]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[DOT_CRIT_EDGE_LOOPEXIT]], label [[DOTLR_PH]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK:       ._crit_edge.loopexit:
; CHECK-NEXT:    [[DOTLCSSA:%.*]] = phi i32 [ [[TMP17]], [[DOTLR_PH]] ], [ [[TMP9]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[DOT_CRIT_EDGE]]
; CHECK:       ._crit_edge:
; CHECK-NEXT:    [[PROD_0_LCSSA:%.*]] = phi i32 [ 1, [[TMP0:%.*]] ], [ [[DOTLCSSA]], [[DOT_CRIT_EDGE_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[PROD_0_LCSSA]]
;
  %1 = icmp sgt i32 %n, 0
  br i1 %1, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %prod.02 = phi i32 [ %9, %.lr.ph ], [ 1, %0 ]
  %2 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %3 = load i32, ptr %2, align 4
  %4 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
  %5 = load i32, ptr %4, align 4
  %6 = trunc i64 %indvars.iv to i32
  %7 = mul i32 %prod.02, %6
  %8 = mul i32 %7, %3
  %9 = mul i32 %8, %5
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %0
  %prod.0.lcssa = phi i32 [ 1, %0 ], [ %9, %.lr.ph ]
  ret i32 %prod.0.lcssa
}

define i32 @reduction_mix(i32 %n, ptr %A, ptr %B) {
; CHECK-LABEL: define i32 @reduction_mix(
; CHECK-SAME: i32 [[N:%.*]], ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[TMP1]], label [[DOTLR_PH_PREHEADER:%.*]], label [[DOT_CRIT_EDGE:%.*]]
; CHECK:       .lr.ph.preheader:
; CHECK-NEXT:    [[TMP2:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[TMP2]], 2147483644
; 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 <4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP7:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP3]], align 4
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD1:%.*]] = load <4 x i32>, ptr [[TMP4]], align 4
; CHECK-NEXT:    [[TMP5:%.*]] = mul nsw <4 x i32> [[WIDE_LOAD1]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP6:%.*]] = add <4 x i32> [[VEC_PHI]], [[VEC_IND]]
; CHECK-NEXT:    [[TMP7]] = add <4 x i32> [[TMP6]], [[TMP5]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <4 x i32> [[VEC_IND]], <i32 4, i32 4, i32 4, i32 4>
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP9:%.*]] = call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> [[TMP7]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[TMP2]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[DOT_CRIT_EDGE_LOOPEXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[DOTLR_PH_PREHEADER]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP9]], [[MIDDLE_BLOCK]] ], [ 0, [[DOTLR_PH_PREHEADER]] ]
; CHECK-NEXT:    br label [[DOTLR_PH:%.*]]
; CHECK:       .lr.ph:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[DOTLR_PH]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[SUM_02:%.*]] = phi i32 [ [[TMP17:%.*]], [[DOTLR_PH]] ], [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP11:%.*]] = load i32, ptr [[TMP10]], align 4
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP13:%.*]] = load i32, ptr [[TMP12]], align 4
; CHECK-NEXT:    [[TMP14:%.*]] = mul nsw i32 [[TMP13]], [[TMP11]]
; CHECK-NEXT:    [[TMP15:%.*]] = trunc i64 [[INDVARS_IV]] to i32
; CHECK-NEXT:    [[TMP16:%.*]] = add i32 [[SUM_02]], [[TMP15]]
; CHECK-NEXT:    [[TMP17]] = add i32 [[TMP16]], [[TMP14]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[DOT_CRIT_EDGE_LOOPEXIT]], label [[DOTLR_PH]], !llvm.loop [[LOOP7:![0-9]+]]
; CHECK:       ._crit_edge.loopexit:
; CHECK-NEXT:    [[DOTLCSSA:%.*]] = phi i32 [ [[TMP17]], [[DOTLR_PH]] ], [ [[TMP9]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[DOT_CRIT_EDGE]]
; CHECK:       ._crit_edge:
; CHECK-NEXT:    [[SUM_0_LCSSA:%.*]] = phi i32 [ 0, [[TMP0:%.*]] ], [ [[DOTLCSSA]], [[DOT_CRIT_EDGE_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[SUM_0_LCSSA]]
;
  %1 = icmp sgt i32 %n, 0
  br i1 %1, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %sum.02 = phi i32 [ %9, %.lr.ph ], [ 0, %0 ]
  %2 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %3 = load i32, ptr %2, align 4
  %4 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
  %5 = load i32, ptr %4, align 4
  %6 = mul nsw i32 %5, %3
  %7 = trunc i64 %indvars.iv to i32
  %8 = add i32 %sum.02, %7
  %9 = add i32 %8, %6
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %0
  %sum.0.lcssa = phi i32 [ 0, %0 ], [ %9, %.lr.ph ]
  ret i32 %sum.0.lcssa
}

define i32 @reduction_mul(i32 %n, ptr %A, ptr %B) {
; CHECK-LABEL: define i32 @reduction_mul(
; CHECK-SAME: i32 [[N:%.*]], ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[TMP1]], label [[DOTLR_PH_PREHEADER:%.*]], label [[DOT_CRIT_EDGE:%.*]]
; CHECK:       .lr.ph.preheader:
; CHECK-NEXT:    [[TMP2:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[TMP2]], 2147483644
; 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 <4 x i32> [ <i32 19, i32 1, i32 1, i32 1>, [[VECTOR_PH]] ], [ [[TMP7:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP3]], align 4
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD1:%.*]] = load <4 x i32>, ptr [[TMP4]], align 4
; CHECK-NEXT:    [[TMP5:%.*]] = add <4 x i32> [[WIDE_LOAD]], [[VEC_IND]]
; CHECK-NEXT:    [[TMP6:%.*]] = add <4 x i32> [[TMP5]], [[WIDE_LOAD1]]
; CHECK-NEXT:    [[TMP7]] = mul <4 x i32> [[TMP6]], [[VEC_PHI]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <4 x i32> [[VEC_IND]], <i32 4, i32 4, i32 4, i32 4>
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP9:%.*]] = call i32 @llvm.vector.reduce.mul.v4i32(<4 x i32> [[TMP7]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[TMP2]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[DOT_CRIT_EDGE_LOOPEXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[DOTLR_PH_PREHEADER]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP9]], [[MIDDLE_BLOCK]] ], [ 19, [[DOTLR_PH_PREHEADER]] ]
; CHECK-NEXT:    br label [[DOTLR_PH:%.*]]
; CHECK:       .lr.ph:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[DOTLR_PH]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[SUM_02:%.*]] = phi i32 [ [[TMP17:%.*]], [[DOTLR_PH]] ], [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP11:%.*]] = load i32, ptr [[TMP10]], align 4
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP13:%.*]] = load i32, ptr [[TMP12]], align 4
; CHECK-NEXT:    [[TMP14:%.*]] = trunc i64 [[INDVARS_IV]] to i32
; CHECK-NEXT:    [[TMP15:%.*]] = add i32 [[TMP11]], [[TMP14]]
; CHECK-NEXT:    [[TMP16:%.*]] = add i32 [[TMP15]], [[TMP13]]
; CHECK-NEXT:    [[TMP17]] = mul i32 [[TMP16]], [[SUM_02]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[DOT_CRIT_EDGE_LOOPEXIT]], label [[DOTLR_PH]], !llvm.loop [[LOOP9:![0-9]+]]
; CHECK:       ._crit_edge.loopexit:
; CHECK-NEXT:    [[DOTLCSSA:%.*]] = phi i32 [ [[TMP17]], [[DOTLR_PH]] ], [ [[TMP9]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[DOT_CRIT_EDGE]]
; CHECK:       ._crit_edge:
; CHECK-NEXT:    [[SUM_0_LCSSA:%.*]] = phi i32 [ 0, [[TMP0:%.*]] ], [ [[DOTLCSSA]], [[DOT_CRIT_EDGE_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[SUM_0_LCSSA]]
;
  %1 = icmp sgt i32 %n, 0
  br i1 %1, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %sum.02 = phi i32 [ %9, %.lr.ph ], [ 19, %0 ]
  %2 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %3 = load i32, ptr %2, align 4
  %4 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
  %5 = load i32, ptr %4, align 4
  %6 = trunc i64 %indvars.iv to i32
  %7 = add i32 %3, %6
  %8 = add i32 %7, %5
  %9 = mul i32 %8, %sum.02
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %0
  %sum.0.lcssa = phi i32 [ 0, %0 ], [ %9, %.lr.ph ]
  ret i32 %sum.0.lcssa
}

define i32 @start_at_non_zero(ptr %in, ptr %coeff, ptr %out, i32 %n) {
; CHECK-LABEL: define i32 @start_at_non_zero(
; CHECK-SAME: ptr [[IN:%.*]], ptr [[COEFF:%.*]], ptr [[OUT:%.*]], i32 [[N:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP7:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[TMP0]], 2147483644
; 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 <4 x i32> [ <i32 120, i32 0, i32 0, i32 0>, [[VECTOR_PH]] ], [ [[TMP4:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds i32, ptr [[IN]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[COEFF]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD1:%.*]] = load <4 x i32>, ptr [[TMP2]], align 4
; CHECK-NEXT:    [[TMP3:%.*]] = mul nsw <4 x i32> [[WIDE_LOAD1]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP4]] = add <4 x i32> [[TMP3]], [[VEC_PHI]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP10:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP6:%.*]] = call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> [[TMP4]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[TMP0]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[FOR_END_LOOPEXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP6]], [[MIDDLE_BLOCK]] ], [ 120, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[SUM_09:%.*]] = phi i32 [ [[ADD:%.*]], [[FOR_BODY]] ], [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[IN]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP7:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[COEFF]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP8:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT:    [[MUL:%.*]] = mul nsw i32 [[TMP8]], [[TMP7]]
; CHECK-NEXT:    [[ADD]] = add nsw i32 [[MUL]], [[SUM_09]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY]], !llvm.loop [[LOOP11:![0-9]+]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], [[FOR_BODY]] ], [ [[TMP6]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    [[SUM_0_LCSSA:%.*]] = phi i32 [ 120, [[ENTRY:%.*]] ], [ [[ADD_LCSSA]], [[FOR_END_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[SUM_0_LCSSA]]
;
entry:
  %cmp7 = icmp sgt i32 %n, 0
  br i1 %cmp7, label %for.body, label %for.end

for.body:                                         ; preds = %entry, %for.body
  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
  %sum.09 = phi i32 [ %add, %for.body ], [ 120, %entry ]
  %arrayidx = getelementptr inbounds i32, ptr %in, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %arrayidx2 = getelementptr inbounds i32, ptr %coeff, i64 %indvars.iv
  %1 = load i32, ptr %arrayidx2, align 4
  %mul = mul nsw i32 %1, %0
  %add = add nsw i32 %mul, %sum.09
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  %sum.0.lcssa = phi i32 [ 120, %entry ], [ %add, %for.body ]
  ret i32 %sum.0.lcssa
}

define i32 @reduction_and(i32 %n, ptr %A, ptr %B) {
; CHECK-LABEL: define i32 @reduction_and(
; CHECK-SAME: i32 [[N:%.*]], ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP7:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[TMP0]], 2147483644
; 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 <4 x i32> [ <i32 -1, i32 -1, i32 -1, i32 -1>, [[VECTOR_PH]] ], [ [[TMP4:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD1:%.*]] = load <4 x i32>, ptr [[TMP2]], align 4
; CHECK-NEXT:    [[TMP3:%.*]] = add nsw <4 x i32> [[WIDE_LOAD1]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP4]] = and <4 x i32> [[TMP3]], [[VEC_PHI]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; 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:    [[TMP6:%.*]] = call i32 @llvm.vector.reduce.and.v4i32(<4 x i32> [[TMP4]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[TMP0]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[FOR_END_LOOPEXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP6]], [[MIDDLE_BLOCK]] ], [ -1, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[RESULT_08:%.*]] = phi i32 [ [[AND:%.*]], [[FOR_BODY]] ], [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP7:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP8:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP8]], [[TMP7]]
; CHECK-NEXT:    [[AND]] = and i32 [[ADD]], [[RESULT_08]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY]], !llvm.loop [[LOOP13:![0-9]+]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    [[AND_LCSSA:%.*]] = phi i32 [ [[AND]], [[FOR_BODY]] ], [ [[TMP6]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    [[RESULT_0_LCSSA:%.*]] = phi i32 [ -1, [[ENTRY:%.*]] ], [ [[AND_LCSSA]], [[FOR_END_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT_0_LCSSA]]
;
entry:
  %cmp7 = icmp sgt i32 %n, 0
  br i1 %cmp7, label %for.body, label %for.end

for.body:                                         ; preds = %entry, %for.body
  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
  %result.08 = phi i32 [ %and, %for.body ], [ -1, %entry ]
  %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %arrayidx2 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
  %1 = load i32, ptr %arrayidx2, align 4
  %add = add nsw i32 %1, %0
  %and = and i32 %add, %result.08
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  %result.0.lcssa = phi i32 [ -1, %entry ], [ %and, %for.body ]
  ret i32 %result.0.lcssa
}

define i32 @reduction_or(i32 %n, ptr %A, ptr %B) {
; CHECK-LABEL: define i32 @reduction_or(
; CHECK-SAME: i32 [[N:%.*]], ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP7:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[TMP0]], 2147483644
; 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 <4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP4:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD1:%.*]] = load <4 x i32>, ptr [[TMP2]], align 4
; CHECK-NEXT:    [[TMP3:%.*]] = add nsw <4 x i32> [[WIDE_LOAD1]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP4]] = or <4 x i32> [[TMP3]], [[VEC_PHI]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP14:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP6:%.*]] = call i32 @llvm.vector.reduce.or.v4i32(<4 x i32> [[TMP4]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[TMP0]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[FOR_END_LOOPEXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP6]], [[MIDDLE_BLOCK]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[RESULT_08:%.*]] = phi i32 [ [[OR:%.*]], [[FOR_BODY]] ], [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP7:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP8:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP8]], [[TMP7]]
; CHECK-NEXT:    [[OR]] = or i32 [[ADD]], [[RESULT_08]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY]], !llvm.loop [[LOOP15:![0-9]+]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    [[OR_LCSSA:%.*]] = phi i32 [ [[OR]], [[FOR_BODY]] ], [ [[TMP6]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    [[RESULT_0_LCSSA:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[OR_LCSSA]], [[FOR_END_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT_0_LCSSA]]
;
entry:
  %cmp7 = icmp sgt i32 %n, 0
  br i1 %cmp7, label %for.body, label %for.end

for.body:                                         ; preds = %entry, %for.body
  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
  %result.08 = phi i32 [ %or, %for.body ], [ 0, %entry ]
  %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %arrayidx2 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
  %1 = load i32, ptr %arrayidx2, align 4
  %add = add nsw i32 %1, %0
  %or = or i32 %add, %result.08
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  %result.0.lcssa = phi i32 [ 0, %entry ], [ %or, %for.body ]
  ret i32 %result.0.lcssa
}

define i32 @reduction_xor(i32 %n, ptr %A, ptr %B) {
; CHECK-LABEL: define i32 @reduction_xor(
; CHECK-SAME: i32 [[N:%.*]], ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP7:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[TMP0]], 2147483644
; 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 <4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP4:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD1:%.*]] = load <4 x i32>, ptr [[TMP2]], align 4
; CHECK-NEXT:    [[TMP3:%.*]] = add nsw <4 x i32> [[WIDE_LOAD1]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP4]] = xor <4 x i32> [[TMP3]], [[VEC_PHI]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP16:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP6:%.*]] = call i32 @llvm.vector.reduce.xor.v4i32(<4 x i32> [[TMP4]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[TMP0]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[FOR_END_LOOPEXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP6]], [[MIDDLE_BLOCK]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[RESULT_08:%.*]] = phi i32 [ [[XOR:%.*]], [[FOR_BODY]] ], [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP7:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP8:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP8]], [[TMP7]]
; CHECK-NEXT:    [[XOR]] = xor i32 [[ADD]], [[RESULT_08]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY]], !llvm.loop [[LOOP17:![0-9]+]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    [[XOR_LCSSA:%.*]] = phi i32 [ [[XOR]], [[FOR_BODY]] ], [ [[TMP6]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    [[RESULT_0_LCSSA:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[XOR_LCSSA]], [[FOR_END_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[RESULT_0_LCSSA]]
;
entry:
  %cmp7 = icmp sgt i32 %n, 0
  br i1 %cmp7, label %for.body, label %for.end

for.body:                                         ; preds = %entry, %for.body
  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
  %result.08 = phi i32 [ %xor, %for.body ], [ 0, %entry ]
  %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %arrayidx2 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
  %1 = load i32, ptr %arrayidx2, align 4
  %add = add nsw i32 %1, %0
  %xor = xor i32 %add, %result.08
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  %result.0.lcssa = phi i32 [ 0, %entry ], [ %xor, %for.body ]
  ret i32 %result.0.lcssa
}

; In this code the subtracted variable is on the RHS and this is not an induction variable.
define i32 @reduction_sub_rhs(i32 %n, ptr %A) {
; CHECK-LABEL: define i32 @reduction_sub_rhs(
; CHECK-SAME: i32 [[N:%.*]], ptr [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP4:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[CMP4]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    [[X_05:%.*]] = phi i32 [ [[SUB:%.*]], [[FOR_BODY]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[SUB]] = sub nsw i32 [[TMP0]], [[X_05]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_END_LOOPEXIT:%.*]], label [[FOR_BODY]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    [[X_0_LCSSA:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[SUB]], [[FOR_END_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[X_0_LCSSA]]
;
entry:
  %cmp4 = icmp sgt i32 %n, 0
  br i1 %cmp4, label %for.body, label %for.end

for.body:                                         ; preds = %entry, %for.body
  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
  %x.05 = phi i32 [ %sub, %for.body ], [ 0, %entry ]
  %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %sub = sub nsw i32 %0, %x.05
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  %x.0.lcssa = phi i32 [ 0, %entry ], [ %sub, %for.body ]
  ret i32 %x.0.lcssa
}


; In this test the reduction variable is on the LHS and we can vectorize it.
define i32 @reduction_sub_lhs(i32 %n, ptr %A) {
; CHECK-LABEL: define i32 @reduction_sub_lhs(
; CHECK-SAME: i32 [[N:%.*]], ptr [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP4:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[CMP4]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[TMP0]], 2147483644
; 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 <4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP2:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP2]] = sub <4 x i32> [[VEC_PHI]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP3:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP3]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP18:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP4:%.*]] = call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> [[TMP2]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[TMP0]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[FOR_END_LOOPEXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP4]], [[MIDDLE_BLOCK]] ], [ 0, [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[X_05:%.*]] = phi i32 [ [[SUB:%.*]], [[FOR_BODY]] ], [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP5:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[SUB]] = sub nsw i32 [[X_05]], [[TMP5]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY]], !llvm.loop [[LOOP19:![0-9]+]]
; CHECK:       for.end.loopexit:
; CHECK-NEXT:    [[SUB_LCSSA:%.*]] = phi i32 [ [[SUB]], [[FOR_BODY]] ], [ [[TMP4]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    br label [[FOR_END]]
; CHECK:       for.end:
; CHECK-NEXT:    [[X_0_LCSSA:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[SUB_LCSSA]], [[FOR_END_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[X_0_LCSSA]]
;
entry:
  %cmp4 = icmp sgt i32 %n, 0
  br i1 %cmp4, label %for.body, label %for.end

for.body:                                         ; preds = %entry, %for.body
  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
  %x.05 = phi i32 [ %sub, %for.body ], [ 0, %entry ]
  %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %sub = sub nsw i32 %x.05, %0
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  %x.0.lcssa = phi i32 [ 0, %entry ], [ %sub, %for.body ]
  ret i32 %x.0.lcssa
}

; We can vectorize conditional reductions with multi-input phis.
define float @reduction_conditional(ptr %A, ptr %B, ptr %C, float %S) {
; CHECK-LABEL: define float @reduction_conditional(
; CHECK-SAME: ptr [[A:%.*]], ptr [[B:%.*]], ptr [[C:%.*]], float [[S:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[TMP0:%.*]] = insertelement <4 x float> <float poison, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00>, float [[S]], 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 <4 x float> [ [[TMP0]], [[VECTOR_PH]] ], [ [[PREDPHI3:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x float>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds float, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD1:%.*]] = load <4 x float>, ptr [[TMP2]], align 4
; CHECK-NEXT:    [[TMP3:%.*]] = fcmp ogt <4 x float> [[WIDE_LOAD]], [[WIDE_LOAD1]]
; CHECK-NEXT:    [[TMP4:%.*]] = fcmp ule <4 x float> [[WIDE_LOAD1]], <float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00>
; CHECK-NEXT:    [[TMP5:%.*]] = and <4 x i1> [[TMP3]], [[TMP4]]
; CHECK-NEXT:    [[TMP6:%.*]] = fcmp ogt <4 x float> [[WIDE_LOAD]], <float 2.000000e+00, float 2.000000e+00, float 2.000000e+00, float 2.000000e+00>
; CHECK-NEXT:    [[TMP7:%.*]] = and <4 x i1> [[TMP5]], [[TMP6]]
; CHECK-NEXT:    [[TMP8:%.*]] = xor <4 x i1> [[TMP6]], <i1 true, i1 true, i1 true, i1 true>
; CHECK-NEXT:    [[TMP9:%.*]] = and <4 x i1> [[TMP5]], [[TMP8]]
; CHECK-NEXT:    [[TMP10:%.*]] = xor <4 x i1> [[TMP3]], <i1 true, i1 true, i1 true, i1 true>
; CHECK-NEXT:    [[PREDPHI_V:%.*]] = select <4 x i1> [[TMP7]], <4 x float> [[WIDE_LOAD1]], <4 x float> [[WIDE_LOAD]]
; CHECK-NEXT:    [[PREDPHI:%.*]] = fadd fast <4 x float> [[VEC_PHI]], [[PREDPHI_V]]
; CHECK-NEXT:    [[TMP11:%.*]] = select <4 x i1> [[TMP10]], <4 x i1> <i1 true, i1 true, i1 true, i1 true>, <4 x i1> [[TMP9]]
; CHECK-NEXT:    [[PREDPHI3]] = select <4 x i1> [[TMP11]], <4 x float> [[VEC_PHI]], <4 x float> [[PREDPHI]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP12:%.*]] = icmp eq i64 [[INDEX_NEXT]], 128
; CHECK-NEXT:    br i1 [[TMP12]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP20:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP13:%.*]] = call fast float @llvm.vector.reduce.fadd.v4f32(float -0.000000e+00, <4 x float> [[PREDPHI3]])
; CHECK-NEXT:    br i1 true, label [[FOR_END:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    br i1 poison, label [[IF_THEN:%.*]], label [[FOR_INC:%.*]]
; CHECK:       if.then:
; CHECK-NEXT:    br i1 poison, label [[IF_THEN8:%.*]], label [[IF_ELSE:%.*]]
; CHECK:       if.then8:
; CHECK-NEXT:    br label [[FOR_INC]]
; CHECK:       if.else:
; CHECK-NEXT:    br i1 poison, label [[IF_THEN16:%.*]], label [[FOR_INC]]
; CHECK:       if.then16:
; CHECK-NEXT:    br label [[FOR_INC]]
; CHECK:       for.inc:
; CHECK-NEXT:    br i1 poison, label [[FOR_BODY]], label [[FOR_END]], !llvm.loop [[LOOP21:![0-9]+]]
; CHECK:       for.end:
; CHECK-NEXT:    [[SUM_1_LCSSA:%.*]] = phi float [ poison, [[FOR_INC]] ], [ [[TMP13]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret float [[SUM_1_LCSSA]]
;
entry:
  br label %for.body

for.body:
  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.inc ]
  %sum.033 = phi float [ %S, %entry ], [ %sum.1, %for.inc ]
  %arrayidx = getelementptr inbounds float, ptr %A, i64 %indvars.iv
  %0 = load float, ptr %arrayidx, align 4
  %arrayidx2 = getelementptr inbounds float, ptr %B, i64 %indvars.iv
  %1 = load float, ptr %arrayidx2, align 4
  %cmp3 = fcmp ogt float %0, %1
  br i1 %cmp3, label %if.then, label %for.inc

if.then:
  %cmp6 = fcmp ogt float %1, 1.000000e+00
  br i1 %cmp6, label %if.then8, label %if.else

if.then8:
  %add = fadd fast float %sum.033, %0
  br label %for.inc

if.else:
  %cmp14 = fcmp ogt float %0, 2.000000e+00
  br i1 %cmp14, label %if.then16, label %for.inc

if.then16:
  %add19 = fadd fast float %sum.033, %1
  br label %for.inc

for.inc:
  %sum.1 = phi float [ %add, %if.then8 ], [ %add19, %if.then16 ], [ %sum.033, %if.else ], [ %sum.033, %for.body ]
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp ne i32 %lftr.wideiv, 128
  br i1 %exitcond, label %for.body, label %for.end

for.end:
  %sum.1.lcssa = phi float [ %sum.1, %for.inc ]
  ret float %sum.1.lcssa
}

; We can't vectorize reductions with phi inputs from outside the reduction.
define float @noreduction_phi(ptr %A, ptr %B, ptr %C, float %S) {
; CHECK-LABEL: define float @noreduction_phi(
; CHECK-SAME: ptr [[A:%.*]], ptr [[B:%.*]], ptr [[C:%.*]], float [[S:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[SUM_033:%.*]] = phi float [ [[S]], [[ENTRY]] ], [ [[SUM_1:%.*]], [[FOR_INC]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP0:%.*]] = load float, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[ARRAYIDX2:%.*]] = getelementptr inbounds float, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP1:%.*]] = load float, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT:    [[CMP3:%.*]] = fcmp ogt float [[TMP0]], [[TMP1]]
; CHECK-NEXT:    br i1 [[CMP3]], label [[IF_THEN:%.*]], label [[FOR_INC]]
; CHECK:       if.then:
; CHECK-NEXT:    [[CMP6:%.*]] = fcmp ogt float [[TMP1]], 1.000000e+00
; CHECK-NEXT:    br i1 [[CMP6]], label [[IF_THEN8:%.*]], label [[IF_ELSE:%.*]]
; CHECK:       if.then8:
; CHECK-NEXT:    [[ADD:%.*]] = fadd fast float [[SUM_033]], [[TMP0]]
; CHECK-NEXT:    br label [[FOR_INC]]
; CHECK:       if.else:
; CHECK-NEXT:    [[CMP14:%.*]] = fcmp ogt float [[TMP0]], 2.000000e+00
; CHECK-NEXT:    br i1 [[CMP14]], label [[IF_THEN16:%.*]], label [[FOR_INC]]
; CHECK:       if.then16:
; CHECK-NEXT:    [[ADD19:%.*]] = fadd fast float [[SUM_033]], [[TMP1]]
; CHECK-NEXT:    br label [[FOR_INC]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[SUM_1]] = phi float [ [[ADD]], [[IF_THEN8]] ], [ [[ADD19]], [[IF_THEN16]] ], [ 0.000000e+00, [[IF_ELSE]] ], [ [[SUM_033]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], 128
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]]
; CHECK:       for.end:
; CHECK-NEXT:    ret float [[SUM_1]]
;
entry:
  br label %for.body

for.body:
  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.inc ]
  %sum.033 = phi float [ %S, %entry ], [ %sum.1, %for.inc ]
  %arrayidx = getelementptr inbounds float, ptr %A, i64 %indvars.iv
  %0 = load float, ptr %arrayidx, align 4
  %arrayidx2 = getelementptr inbounds float, ptr %B, i64 %indvars.iv
  %1 = load float, ptr %arrayidx2, align 4
  %cmp3 = fcmp ogt float %0, %1
  br i1 %cmp3, label %if.then, label %for.inc

if.then:
  %cmp6 = fcmp ogt float %1, 1.000000e+00
  br i1 %cmp6, label %if.then8, label %if.else

if.then8:
  %add = fadd fast float %sum.033, %0
  br label %for.inc

if.else:
  %cmp14 = fcmp ogt float %0, 2.000000e+00
  br i1 %cmp14, label %if.then16, label %for.inc

if.then16:
  %add19 = fadd fast float %sum.033, %1
  br label %for.inc

for.inc:
  %sum.1 = phi float [ %add, %if.then8 ], [ %add19, %if.then16 ], [ 0.000000e+00, %if.else ], [ %sum.033, %for.body ]
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp ne i32 %lftr.wideiv, 128
  br i1 %exitcond, label %for.body, label %for.end

for.end:
  %sum.1.lcssa = phi float [ %sum.1, %for.inc ]
  ret float %sum.1.lcssa
}

; We can't vectorize reductions that feed another header PHI.
define float @noredux_header_phi(ptr %A, ptr %B, ptr %C, float %S)  {
; CHECK-LABEL: define float @noredux_header_phi(
; CHECK-SAME: ptr [[A:%.*]], ptr [[B:%.*]], ptr [[C:%.*]], float [[S:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[SUM2_09:%.*]] = phi float [ 0.000000e+00, [[ENTRY]] ], [ [[ADD1:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[SUM_08:%.*]] = phi float [ [[S]], [[ENTRY]] ], [ [[ADD:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds float, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP0:%.*]] = load float, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[ADD]] = fadd fast float [[SUM_08]], [[TMP0]]
; CHECK-NEXT:    [[ADD1]] = fadd fast float [[SUM2_09]], [[ADD]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], 128
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label [[FOR_END:%.*]], label [[FOR_BODY]]
; CHECK:       for.end:
; CHECK-NEXT:    [[ADD2:%.*]] = fadd fast float [[ADD]], [[ADD1]]
; CHECK-NEXT:    ret float [[ADD2]]
;
entry:
  br label %for.body

for.body:
  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
  %sum2.09 = phi float [ 0.000000e+00, %entry ], [ %add1, %for.body ]
  %sum.08 = phi float [ %S, %entry ], [ %add, %for.body ]
  %arrayidx = getelementptr inbounds float, ptr %B, i64 %indvars.iv
  %0 = load float, ptr %arrayidx, align 4
  %add = fadd fast float %sum.08, %0
  %add1 = fadd fast float %sum2.09, %add
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp ne i32 %lftr.wideiv, 128
  br i1 %exitcond, label %for.body, label %for.end

for.end:
  %add1.lcssa = phi float [ %add1, %for.body ]
  %add.lcssa = phi float [ %add, %for.body ]
  %add2 = fadd fast float %add.lcssa, %add1.lcssa
  ret float %add2
}


; When vectorizing a reduction whose loop header phi value is used outside the
; loop special care must be taken. Otherwise, the reduced value feeding into the
; outside user misses a few iterations (VF-1) of the loop.
; PR16522
define i32 @phivalueredux(i32 %p) {
; CHECK-LABEL: define i32 @phivalueredux(
; CHECK-SAME: i32 [[P:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[T_03:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[P_ADDR_02:%.*]] = phi i32 [ [[P]], [[ENTRY]] ], [ [[XOR:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[XOR]] = xor i32 [[P_ADDR_02]], -1
; CHECK-NEXT:    [[INC]] = add nuw nsw i32 [[T_03]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[INC]], 16
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]]
; CHECK:       for.end:
; CHECK-NEXT:    ret i32 [[P_ADDR_02]]
;
entry:
  br label %for.body

for.body:
  %t.03 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
  %p.addr.02 = phi i32 [ %p, %entry ], [ %xor, %for.body ]
  %xor = xor i32 %p.addr.02, -1
  %inc = add nsw i32 %t.03, 1
  %exitcond = icmp eq i32 %inc, 16
  br i1 %exitcond, label %for.end, label %for.body

for.end:
  ret i32 %p.addr.02
}

; Don't vectorize a reduction value that is not the last in a reduction cyle. We
; would loose iterations (VF-1) on the operations after that use.
; PR17498
define i32 @not_last_operation(i32 %p, i32 %val) {
; CHECK-LABEL: define i32 @not_last_operation(
; CHECK-SAME: i32 [[P:%.*]], i32 [[VAL:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp ne i32 [[P]], 0
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[INC613_1:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC6_1:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[INC511_1:%.*]] = phi i32 [ [[VAL]], [[ENTRY]] ], [ [[INC5_1:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[INC4_1:%.*]] = zext i1 [[TOBOOL]] to i32
; CHECK-NEXT:    [[INC511_1_INC4_1:%.*]] = add nsw i32 [[INC511_1]], [[INC4_1]]
; CHECK-NEXT:    [[INC5_1]] = add nsw i32 [[INC511_1_INC4_1]], 1
; CHECK-NEXT:    [[INC6_1]] = add nuw nsw i32 [[INC613_1]], 1
; CHECK-NEXT:    [[EXITCOND_1:%.*]] = icmp eq i32 [[INC6_1]], 22
; CHECK-NEXT:    br i1 [[EXITCOND_1]], label [[EXIT:%.*]], label [[FOR_BODY]]
; CHECK:       exit:
; CHECK-NEXT:    [[INC_2:%.*]] = add nsw i32 [[INC511_1_INC4_1]], 2
; CHECK-NEXT:    ret i32 [[INC_2]]
;
entry:
  %tobool = icmp eq i32 %p, 0
  br label %for.body

for.body:
  %inc613.1 = phi i32 [ 0, %entry ], [ %inc6.1, %for.body ]
  %inc511.1 = phi i32 [ %val, %entry ], [ %inc5.1, %for.body ]
  %0 = zext i1 %tobool to i32
  %inc4.1 = xor i32 %0, 1
  %inc511.1.inc4.1 = add nsw i32 %inc511.1, %inc4.1
  %inc5.1 = add nsw i32 %inc511.1.inc4.1, 1
  %inc6.1 = add nsw i32 %inc613.1, 1
  %exitcond.1 = icmp eq i32 %inc6.1, 22
  br i1 %exitcond.1, label %exit, label %for.body

exit:
  %inc.2 = add nsw i32 %inc511.1.inc4.1, 2
  ret i32 %inc.2
}

define i32 @reduction_sum_multiuse(i32 %n, ptr %A, ptr %B) {
; CHECK-LABEL: define i32 @reduction_sum_multiuse(
; CHECK-SAME: i32 [[N:%.*]], ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[TMP1]], label [[DOTLR_PH_PREHEADER:%.*]], label [[END:%.*]]
; CHECK:       .lr.ph.preheader:
; CHECK-NEXT:    [[TMP2:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i64 [[TMP2]], 2147483644
; 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 <4 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP7:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP3]], align 4
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD1:%.*]] = load <4 x i32>, ptr [[TMP4]], align 4
; CHECK-NEXT:    [[TMP5:%.*]] = add <4 x i32> [[VEC_PHI]], [[VEC_IND]]
; CHECK-NEXT:    [[TMP6:%.*]] = add <4 x i32> [[TMP5]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP7]] = add <4 x i32> [[TMP6]], [[WIDE_LOAD1]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <4 x i32> [[VEC_IND]], <i32 4, i32 4, i32 4, i32 4>
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP22:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP9:%.*]] = call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> [[TMP7]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N_VEC]], [[TMP2]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[DOT_CRIT_EDGE:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[DOTLR_PH_PREHEADER]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i32 [ [[TMP9]], [[MIDDLE_BLOCK]] ], [ 0, [[DOTLR_PH_PREHEADER]] ]
; CHECK-NEXT:    br label [[DOTLR_PH:%.*]]
; CHECK:       .lr.ph:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[DOTLR_PH]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[SUM_02:%.*]] = phi i32 [ [[TMP17:%.*]], [[DOTLR_PH]] ], [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP11:%.*]] = load i32, ptr [[TMP10]], align 4
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP13:%.*]] = load i32, ptr [[TMP12]], align 4
; CHECK-NEXT:    [[TMP14:%.*]] = trunc i64 [[INDVARS_IV]] to i32
; CHECK-NEXT:    [[TMP15:%.*]] = add i32 [[SUM_02]], [[TMP14]]
; CHECK-NEXT:    [[TMP16:%.*]] = add i32 [[TMP15]], [[TMP11]]
; CHECK-NEXT:    [[TMP17]] = add i32 [[TMP16]], [[TMP13]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[DOT_CRIT_EDGE]], label [[DOTLR_PH]], !llvm.loop [[LOOP23:![0-9]+]]
; CHECK:       ._crit_edge:
; CHECK-NEXT:    [[SUM_COPY:%.*]] = phi i32 [ [[TMP17]], [[DOTLR_PH]] ], [ [[TMP9]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    [[TMP18:%.*]] = shl i32 [[SUM_COPY]], 1
; CHECK-NEXT:    br label [[END]]
; CHECK:       end:
; CHECK-NEXT:    [[F2:%.*]] = phi i32 [ 0, [[TMP0:%.*]] ], [ [[TMP18]], [[DOT_CRIT_EDGE]] ]
; CHECK-NEXT:    ret i32 [[F2]]
;
  %1 = icmp sgt i32 %n, 0
  br i1 %1, label %.lr.ph.preheader, label %end
.lr.ph.preheader:                                 ; preds = %0
  br label %.lr.ph

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %sum.02 = phi i32 [ %9, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %2 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %3 = load i32, ptr %2, align 4
  %4 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
  %5 = load i32, ptr %4, align 4
  %6 = trunc i64 %indvars.iv to i32
  %7 = add i32 %sum.02, %6
  %8 = add i32 %7, %3
  %9 = add i32 %8, %5
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %n
  br i1 %exitcond, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %0
  %sum.lcssa = phi i32 [ %9, %.lr.ph ]
  %sum.copy = phi i32 [ %9, %.lr.ph ]
  br label %end

end:
  %f1 = phi i32 [ 0, %0 ], [ %sum.lcssa, %._crit_edge ]
  %f2 = phi i32 [ 0, %0 ], [ %sum.copy, %._crit_edge ]
  %final = add i32 %f1, %f2
  ret i32 %final
}

; This looks like a predicated reduction, but it is a reset of the reduction
; variable. We cannot vectorize this.
define void @reduction_reset(i32 %N, ptr %arrayA, ptr %arrayB) {
; CHECK-LABEL: define void @reduction_reset(
; CHECK-SAME: i32 [[N:%.*]], ptr [[ARRAYA:%.*]], ptr [[ARRAYB:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C4:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[C4]], label [[DOTLR_PH_PREHEADER:%.*]], label [[DOT_CRIT_EDGE:%.*]]
; CHECK:       .lr.ph.preheader:
; CHECK-NEXT:    [[C5:%.*]] = add nsw i32 [[N]], -1
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    br label [[DOTLR_PH:%.*]]
; CHECK:       .lr.ph:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, [[DOTLR_PH_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[DOTLR_PH]] ]
; CHECK-NEXT:    [[DOT017:%.*]] = phi i32 [ 100, [[DOTLR_PH_PREHEADER]] ], [ [[CSEL:%.*]], [[DOTLR_PH]] ]
; CHECK-NEXT:    [[C6:%.*]] = getelementptr inbounds i32, ptr [[ARRAYA]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[C7:%.*]] = load i32, ptr [[C6]], align 4
; CHECK-NEXT:    [[C8:%.*]] = icmp sgt i32 [[C7]], 0
; CHECK-NEXT:    [[C9:%.*]] = add nsw i32 [[C7]], [[DOT017]]
; CHECK-NEXT:    [[CSEL]] = select i1 [[C8]], i32 [[C9]], i32 0
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[DOT_CRIT_EDGE_LOOPEXIT:%.*]], label [[DOTLR_PH]]
; CHECK:       ._crit_edge.loopexit:
; CHECK-NEXT:    [[PHITMP19:%.*]] = sext i32 [[C5]] to i64
; CHECK-NEXT:    br label [[DOT_CRIT_EDGE]]
; CHECK:       ._crit_edge:
; CHECK-NEXT:    [[DOT015_LCSSA:%.*]] = phi i64 [ -1, [[ENTRY:%.*]] ], [ [[PHITMP19]], [[DOT_CRIT_EDGE_LOOPEXIT]] ]
; CHECK-NEXT:    [[DOT0_LCSSA:%.*]] = phi i32 [ 100, [[ENTRY]] ], [ [[CSEL]], [[DOT_CRIT_EDGE_LOOPEXIT]] ]
; CHECK-NEXT:    [[C10:%.*]] = getelementptr inbounds i32, ptr [[ARRAYB]], i64 [[DOT015_LCSSA]]
; CHECK-NEXT:    store i32 [[DOT0_LCSSA]], ptr [[C10]], align 4
; CHECK-NEXT:    ret void
;
entry:
  %c4 = icmp sgt i32 %N, 0
  br i1 %c4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %entry
  %c5 = add i32 %N, -1
  %wide.trip.count = zext i32 %N to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %.017 = phi i32 [ 100, %.lr.ph.preheader ], [ %csel, %.lr.ph ]
  %c6 = getelementptr inbounds i32, ptr %arrayA, i64 %indvars.iv
  %c7 = load i32, ptr %c6, align 4
  %c8 = icmp sgt i32 %c7, 0
  %c9 = add nsw i32 %c7, %.017
  %csel = select i1 %c8, i32 %c9, i32 0
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond, label %._crit_edge.loopexit, label %.lr.ph

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %csel.lcssa = phi i32 [ %csel, %.lr.ph ]
  %phitmp19 = sext i32 %c5 to i64
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %entry
  %.015.lcssa = phi i64 [ -1, %entry ], [ %phitmp19, %._crit_edge.loopexit ]
  %.0.lcssa = phi i32 [ 100, %entry ], [ %csel.lcssa, %._crit_edge.loopexit ]
  %c10 = getelementptr inbounds i32, ptr %arrayB, i64 %.015.lcssa
  store i32 %.0.lcssa, ptr %c10, align 4
  ret void
}

; Can vectorize reduction with redundant single-operand phi input.
define i64 @reduction_with_phi_with_one_incoming_on_backedge(i16 %n, ptr %A) {
; CHECK-LABEL: define i64 @reduction_with_phi_with_one_incoming_on_backedge(
; CHECK-SAME: i16 [[N:%.*]], ptr [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[SMAX:%.*]] = call i16 @llvm.smax.i16(i16 [[N]], i16 2)
; CHECK-NEXT:    [[TMP0:%.*]] = add nsw i16 [[SMAX]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = zext nneg i16 [[TMP0]] to i32
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp slt i16 [[N]], 5
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i32 [[TMP1]], 32764
; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc nuw nsw i32 [[N_VEC]] to i16
; CHECK-NEXT:    [[IND_END:%.*]] = or disjoint i16 [[DOTCAST]], 1
; 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 <4 x i64> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP4:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[DOTCAST1:%.*]] = trunc i32 [[INDEX]] to i16
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = or disjoint i16 [[DOTCAST1]], 1
; CHECK-NEXT:    [[TMP2:%.*]] = sext i16 [[OFFSET_IDX]] to i64
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr i64, ptr [[A]], i64 [[TMP2]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i64>, ptr [[TMP3]], align 4
; CHECK-NEXT:    [[TMP4]] = add <4 x i64> [[VEC_PHI]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP24:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP6:%.*]] = call i64 @llvm.vector.reduce.add.v4i64(<4 x i64> [[TMP4]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[N_VEC]], [[TMP1]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i16 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ 1, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i64 [ [[TMP6]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ]
; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
; CHECK:       loop.header:
; CHECK-NEXT:    [[IV:%.*]] = phi i16 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT:    [[SUM:%.*]] = phi i64 [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ], [ [[SUM_NEXT:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT:    [[TMP7:%.*]] = sext i16 [[IV]] to i64
; CHECK-NEXT:    [[GEP_A:%.*]] = getelementptr i64, ptr [[A]], i64 [[TMP7]]
; CHECK-NEXT:    [[LV_A:%.*]] = load i64, ptr [[GEP_A]], align 4
; CHECK-NEXT:    [[SUM_NEXT]] = add nsw i64 [[SUM]], [[LV_A]]
; CHECK-NEXT:    br label [[LOOP_BB:%.*]]
; CHECK:       loop.bb:
; CHECK-NEXT:    br label [[LOOP_LATCH]]
; CHECK:       loop.latch:
; CHECK-NEXT:    [[IV_NEXT]] = add nsw i16 [[IV]], 1
; CHECK-NEXT:    [[COND:%.*]] = icmp slt i16 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[COND]], label [[LOOP_HEADER]], label [[EXIT]], !llvm.loop [[LOOP25:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    [[LCSSA_EXIT:%.*]] = phi i64 [ [[SUM_NEXT]], [[LOOP_LATCH]] ], [ [[TMP6]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[LCSSA_EXIT]]
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i16 [ 1, %entry ], [ %iv.next, %loop.latch ]
  %sum = phi i64 [ 0, %entry ], [ %phi.sum.next, %loop.latch ]
  %gep.A = getelementptr i64, ptr %A, i16 %iv
  %lv.A = load i64, ptr %gep.A
  %sum.next = add nsw i64 %sum, %lv.A
  br label %loop.bb

loop.bb:
  %phi.sum.next = phi i64 [ %sum.next, %loop.header ]
  br label %loop.latch

loop.latch:
  %iv.next = add nsw i16 %iv, 1
  %cond = icmp slt i16 %iv.next, %n
  br i1 %cond, label %loop.header, label %exit

exit:
  %lcssa.exit = phi i64 [ %phi.sum.next, %loop.latch ]
  ret i64 %lcssa.exit
}

; Can vectorize reduction with redundant two-operand phi input.
define i64 @reduction_with_phi_with_two_incoming_on_backedge(i16 %n, ptr %A) {
; CHECK-LABEL: define i64 @reduction_with_phi_with_two_incoming_on_backedge(
; CHECK-SAME: i16 [[N:%.*]], ptr [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[SMAX:%.*]] = call i16 @llvm.smax.i16(i16 [[N]], i16 2)
; CHECK-NEXT:    [[TMP0:%.*]] = add nsw i16 [[SMAX]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = zext nneg i16 [[TMP0]] to i32
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp slt i16 [[N]], 5
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_VEC:%.*]] = and i32 [[TMP1]], 32764
; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc nuw nsw i32 [[N_VEC]] to i16
; CHECK-NEXT:    [[IND_END:%.*]] = or disjoint i16 [[DOTCAST]], 1
; 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 <4 x i64> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP4:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[DOTCAST1:%.*]] = trunc i32 [[INDEX]] to i16
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = or disjoint i16 [[DOTCAST1]], 1
; CHECK-NEXT:    [[TMP2:%.*]] = sext i16 [[OFFSET_IDX]] to i64
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr i64, ptr [[A]], i64 [[TMP2]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i64>, ptr [[TMP3]], align 4
; CHECK-NEXT:    [[TMP4]] = add <4 x i64> [[VEC_PHI]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP26:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP6:%.*]] = call i64 @llvm.vector.reduce.add.v4i64(<4 x i64> [[TMP4]])
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[N_VEC]], [[TMP1]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i16 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ 1, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[BC_MERGE_RDX:%.*]] = phi i64 [ [[TMP6]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ]
; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
; CHECK:       loop.header:
; CHECK-NEXT:    [[IV:%.*]] = phi i16 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT:    [[SUM:%.*]] = phi i64 [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ], [ [[SUM_NEXT:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT:    [[TMP7:%.*]] = sext i16 [[IV]] to i64
; CHECK-NEXT:    [[GEP_A:%.*]] = getelementptr i64, ptr [[A]], i64 [[TMP7]]
; CHECK-NEXT:    [[LV_A:%.*]] = load i64, ptr [[GEP_A]], align 4
; CHECK-NEXT:    [[SUM_NEXT]] = add nsw i64 [[SUM]], [[LV_A]]
; CHECK-NEXT:    [[CMP_0:%.*]] = icmp eq i64 [[LV_A]], 29
; CHECK-NEXT:    br i1 [[CMP_0]], label [[LOOP_BB:%.*]], label [[LOOP_LATCH]]
; CHECK:       loop.bb:
; CHECK-NEXT:    br label [[LOOP_LATCH]]
; CHECK:       loop.latch:
; CHECK-NEXT:    [[IV_NEXT]] = add nsw i16 [[IV]], 1
; CHECK-NEXT:    [[COND:%.*]] = icmp slt i16 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[COND]], label [[LOOP_HEADER]], label [[EXIT]], !llvm.loop [[LOOP27:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    [[LCSSA_EXIT:%.*]] = phi i64 [ [[SUM_NEXT]], [[LOOP_LATCH]] ], [ [[TMP6]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[LCSSA_EXIT]]
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i16 [ 1, %entry ], [ %iv.next, %loop.latch ]
  %sum = phi i64 [ 0, %entry ], [ %phi.sum.next, %loop.latch ]
  %gep.A = getelementptr i64, ptr %A, i16 %iv
  %lv.A = load i64, ptr %gep.A
  %sum.next = add nsw i64 %sum, %lv.A
  %cmp.0 = icmp eq i64 %lv.A, 29
  br i1 %cmp.0, label %loop.bb, label %loop.latch

loop.bb:
  br label %loop.latch

loop.latch:
  %phi.sum.next = phi i64 [ %sum.next, %loop.bb ], [ %sum.next, %loop.header ]
  %iv.next = add nsw i16 %iv, 1
  %cond = icmp slt i16 %iv.next, %n
  br i1 %cond, label %loop.header, label %exit

exit:
  %lcssa.exit = phi i64 [ %phi.sum.next, %loop.latch ]
  ret i64 %lcssa.exit
}