llvm/test/Transforms/LoopVectorize/AArch64/epilog-vectorization-widen-inductions.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --replace-value-regex "!llvm.loop ![0-9]+"
; RUN: opt -passes='loop-vectorize' -force-vector-width=2 -enable-epilogue-vectorization -epilogue-vectorization-force-VF=2 -S %s | FileCheck %s

target triple = "arm64-apple-macosx"

; Test for #57712.
define void @test_widen_ptr_induction(ptr %ptr.start.1) {
; CHECK-LABEL: @test_widen_ptr_induction(
; 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:    [[IND_END:%.*]] = getelementptr i8, ptr [[PTR_START_1:%.*]], i64 10000
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT:    [[NEXT_GEP:%.*]] = getelementptr i8, ptr [[PTR_START_1]], i64 [[TMP0]]
; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[NEXT_GEP1:%.*]] = getelementptr i8, ptr [[PTR_START_1]], i64 [[TMP1]]
; CHECK-NEXT:    [[TMP2:%.*]] = insertelement <2 x ptr> poison, ptr [[NEXT_GEP]], i32 0
; CHECK-NEXT:    [[TMP3:%.*]] = insertelement <2 x ptr> [[TMP2]], ptr [[NEXT_GEP1]], i32 1
; CHECK-NEXT:    [[TMP4:%.*]] = add i64 [[INDEX]], 2
; CHECK-NEXT:    [[NEXT_GEP2:%.*]] = getelementptr i8, ptr [[PTR_START_1]], i64 [[TMP4]]
; CHECK-NEXT:    [[TMP5:%.*]] = add i64 [[INDEX]], 3
; CHECK-NEXT:    [[NEXT_GEP3:%.*]] = getelementptr i8, ptr [[PTR_START_1]], i64 [[TMP5]]
; CHECK-NEXT:    [[TMP6:%.*]] = insertelement <2 x ptr> poison, ptr [[NEXT_GEP2]], i32 0
; CHECK-NEXT:    [[TMP7:%.*]] = insertelement <2 x ptr> [[TMP6]], ptr [[NEXT_GEP3]], i32 1
; CHECK-NEXT:    [[TMP8:%.*]] = icmp ne <2 x ptr> [[TMP3]], zeroinitializer
; CHECK-NEXT:    [[TMP9:%.*]] = icmp ne <2 x ptr> [[TMP7]], zeroinitializer
; CHECK-NEXT:    [[TMP10:%.*]] = extractelement <2 x i1> [[TMP8]], i32 0
; CHECK-NEXT:    tail call void @llvm.assume(i1 [[TMP10]])
; CHECK-NEXT:    [[TMP11:%.*]] = extractelement <2 x i1> [[TMP8]], i32 1
; CHECK-NEXT:    tail call void @llvm.assume(i1 [[TMP11]])
; CHECK-NEXT:    [[TMP12:%.*]] = extractelement <2 x i1> [[TMP9]], i32 0
; CHECK-NEXT:    tail call void @llvm.assume(i1 [[TMP12]])
; CHECK-NEXT:    [[TMP13:%.*]] = extractelement <2 x i1> [[TMP9]], i32 1
; CHECK-NEXT:    tail call void @llvm.assume(i1 [[TMP13]])
; CHECK-NEXT:    [[TMP14:%.*]] = getelementptr i8, ptr [[NEXT_GEP]], i32 0
; CHECK-NEXT:    store <2 x i8> zeroinitializer, ptr [[TMP14]], align 1
; CHECK-NEXT:    [[TMP15:%.*]] = getelementptr i8, ptr [[NEXT_GEP]], i32 2
; CHECK-NEXT:    store <2 x i8> zeroinitializer, ptr [[TMP15]], align 1
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP16:%.*]] = icmp eq i64 [[INDEX_NEXT]], 10000
; CHECK-NEXT:    br i1 [[TMP16]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK:       middle.block:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 10001, 10000
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
; CHECK:       vec.epilog.iter.check:
; CHECK-NEXT:    [[IND_END6:%.*]] = getelementptr i8, ptr [[PTR_START_1]], i64 10000
; CHECK-NEXT:    br i1 true, label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]]
; CHECK:       vec.epilog.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi ptr [ [[IND_END]], [[VEC_EPILOG_ITER_CHECK]] ], [ [[PTR_START_1]], [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ 10000, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[IND_END5:%.*]] = getelementptr i8, ptr [[PTR_START_1]], i64 10000
; CHECK-NEXT:    br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
; CHECK:       vec.epilog.vector.body:
; CHECK-NEXT:    [[INDEX9:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT12:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP17:%.*]] = add i64 [[INDEX9]], 0
; CHECK-NEXT:    [[NEXT_GEP10:%.*]] = getelementptr i8, ptr [[PTR_START_1]], i64 [[TMP17]]
; CHECK-NEXT:    [[TMP18:%.*]] = add i64 [[INDEX9]], 1
; CHECK-NEXT:    [[NEXT_GEP11:%.*]] = getelementptr i8, ptr [[PTR_START_1]], i64 [[TMP18]]
; CHECK-NEXT:    [[TMP19:%.*]] = insertelement <2 x ptr> poison, ptr [[NEXT_GEP10]], i32 0
; CHECK-NEXT:    [[TMP20:%.*]] = insertelement <2 x ptr> [[TMP19]], ptr [[NEXT_GEP11]], i32 1
; CHECK-NEXT:    [[TMP21:%.*]] = icmp ne <2 x ptr> [[TMP20]], zeroinitializer
; CHECK-NEXT:    [[TMP22:%.*]] = extractelement <2 x i1> [[TMP21]], i32 0
; CHECK-NEXT:    tail call void @llvm.assume(i1 [[TMP22]])
; CHECK-NEXT:    [[TMP23:%.*]] = extractelement <2 x i1> [[TMP21]], i32 1
; CHECK-NEXT:    tail call void @llvm.assume(i1 [[TMP23]])
; CHECK-NEXT:    [[TMP24:%.*]] = getelementptr i8, ptr [[NEXT_GEP10]], i32 0
; CHECK-NEXT:    store <2 x i8> zeroinitializer, ptr [[TMP24]], align 1
; CHECK-NEXT:    [[INDEX_NEXT12]] = add nuw i64 [[INDEX9]], 2
; CHECK-NEXT:    [[TMP25:%.*]] = icmp eq i64 [[INDEX_NEXT12]], 10000
; CHECK-NEXT:    br i1 [[TMP25]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK:       vec.epilog.middle.block:
; CHECK-NEXT:    [[CMP_N8:%.*]] = icmp eq i64 10001, 10000
; CHECK-NEXT:    br i1 [[CMP_N8]], label [[EXIT]], label [[VEC_EPILOG_SCALAR_PH]]
; CHECK:       vec.epilog.scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL4:%.*]] = phi i64 [ 10000, [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ 10000, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[ITER_CHECK:%.*]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL7:%.*]] = phi ptr [ [[IND_END5]], [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[IND_END6]], [[VEC_EPILOG_ITER_CHECK]] ], [ [[PTR_START_1]], [[ITER_CHECK]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL4]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[BC_RESUME_VAL7]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[CMP_I_I_I_I:%.*]] = icmp ne ptr [[PTR_IV]], null
; CHECK-NEXT:    tail call void @llvm.assume(i1 [[CMP_I_I_I_I]])
; CHECK-NEXT:    store i8 0, ptr [[PTR_IV]], align 1
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i8, ptr [[PTR_IV]], i64 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV]], 10000
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT]], label [[LOOP]], {{!llvm.loop ![0-9]+}}
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %ptr.iv = phi ptr [ %ptr.start.1, %entry ], [ %ptr.iv.next, %loop ]
  %cmp.i.i.i.i = icmp ne ptr %ptr.iv, null
  tail call void @llvm.assume(i1 %cmp.i.i.i.i)
  store i8 0, ptr %ptr.iv, align 1
  %iv.next = add nuw nsw i64 %iv, 1
  %ptr.iv.next = getelementptr inbounds i8, ptr %ptr.iv, i64 1
  %ec = icmp eq i64 %iv, 10000
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

declare void @llvm.assume(i1 noundef)

define void @test_widen_induction(ptr %A, i64 %N) {
; CHECK-LABEL: @test_widen_induction(
; CHECK-NEXT:  iter.check:
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N:%.*]], 2
; 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]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label [[VEC_EPILOG_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[N]], 4
; 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 <2 x i64> [ <i64 0, i64 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[STEP_ADD:%.*]] = add <2 x i64> [[VEC_IND]], <i64 2, i64 2>
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[INDEX]], 2
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i64, ptr [[A:%.*]], i64 [[TMP0]]
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP1]]
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i64, ptr [[TMP2]], i32 0
; CHECK-NEXT:    store <2 x i64> [[VEC_IND]], ptr [[TMP4]], align 4
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i64, ptr [[TMP2]], i32 2
; CHECK-NEXT:    store <2 x i64> [[STEP_ADD]], ptr [[TMP5]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <2 x i64> [[STEP_ADD]], <i64 2, i64 2>
; CHECK-NEXT:    [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK:       middle.block:
; 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:    [[N_VEC_REMAINING:%.*]] = sub i64 [[N]], [[N_VEC]]
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_VEC_REMAINING]], 2
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]]
; 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:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF3:%.*]] = urem i64 [[N]], 2
; CHECK-NEXT:    [[N_VEC4:%.*]] = sub i64 [[N]], [[N_MOD_VF3]]
; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[BC_RESUME_VAL]], i64 0
; CHECK-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <2 x i64> [[DOTSPLATINSERT]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[INDUCTION:%.*]] = add <2 x i64> [[DOTSPLAT]], <i64 0, i64 1>
; CHECK-NEXT:    br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
; CHECK:       vec.epilog.vector.body:
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT11:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND8:%.*]] = phi <2 x i64> [ [[INDUCTION]], [[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT10:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP7:%.*]] = add i64 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP7]]
; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i64, ptr [[TMP8]], i32 0
; CHECK-NEXT:    store <2 x i64> [[VEC_IND8]], ptr [[TMP9]], align 4
; CHECK-NEXT:    [[INDEX_NEXT11]] = add nuw i64 [[OFFSET_IDX]], 2
; CHECK-NEXT:    [[VEC_IND_NEXT10]] = add <2 x i64> [[VEC_IND8]], <i64 2, i64 2>
; CHECK-NEXT:    [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT11]], [[N_VEC4]]
; CHECK-NEXT:    br i1 [[TMP10]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK:       vec.epilog.middle.block:
; CHECK-NEXT:    [[CMP_N6:%.*]] = icmp eq i64 [[N]], [[N_VEC4]]
; CHECK-NEXT:    br i1 [[CMP_N6]], label [[EXIT]], label [[VEC_EPILOG_SCALAR_PH]]
; CHECK:       vec.epilog.scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL5:%.*]] = phi i64 [ [[N_VEC4]], [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[ITER_CHECK:%.*]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV_1:%.*]] = phi i64 [ [[BC_RESUME_VAL5]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_1_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[GEP_A:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[IV_1]]
; 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 ![0-9]+}}
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv.1 = phi i64 [ 0, %entry ], [ %iv.1.next, %loop ]
  %gep.A = getelementptr inbounds i64, ptr %A, i64 %iv.1
  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 void
}

define void @test_widen_induction_variable_start(ptr %A, i64 %N, i64 %start) {
; CHECK-LABEL: @test_widen_induction_variable_start(
; CHECK-NEXT:  iter.check:
; CHECK-NEXT:    [[TMP0:%.*]] = sub i64 [[N:%.*]], [[START:%.*]]
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP0]], 2
; 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]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label [[VEC_EPILOG_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[TMP0]], 4
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF]]
; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[START]], i64 0
; CHECK-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <2 x i64> [[DOTSPLATINSERT]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[INDUCTION:%.*]] = add <2 x i64> [[DOTSPLAT]], <i64 0, i64 1>
; CHECK-NEXT:    [[IND_END:%.*]] = add i64 [[START]], [[N_VEC]]
; 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 <2 x i64> [ [[INDUCTION]], [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[STEP_ADD:%.*]] = add <2 x i64> [[VEC_IND]], <i64 2, i64 2>
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i64 [[START]], [[INDEX]]
; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[TMP2:%.*]] = add i64 [[OFFSET_IDX]], 2
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i64, ptr [[A:%.*]], i64 [[TMP1]]
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP2]]
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i64, ptr [[TMP3]], i32 0
; CHECK-NEXT:    store <2 x i64> [[VEC_IND]], ptr [[TMP5]], align 4
; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i64, ptr [[TMP3]], i32 2
; CHECK-NEXT:    store <2 x i64> [[STEP_ADD]], ptr [[TMP6]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <2 x i64> [[STEP_ADD]], <i64 2, i64 2>
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![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:    [[IND_END6:%.*]] = add i64 [[START]], [[N_VEC]]
; CHECK-NEXT:    [[N_VEC_REMAINING:%.*]] = sub i64 [[TMP0]], [[N_VEC]]
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_VEC_REMAINING]], 2
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]]
; CHECK:       vec.epilog.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[IND_END]], [[VEC_EPILOG_ITER_CHECK]] ], [ [[START]], [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; 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:%.*]] = urem i64 [[TMP0]], 2
; CHECK-NEXT:    [[N_VEC4:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF3]]
; CHECK-NEXT:    [[IND_END5:%.*]] = add i64 [[START]], [[N_VEC4]]
; CHECK-NEXT:    [[DOTSPLATINSERT10:%.*]] = insertelement <2 x i64> poison, i64 [[BC_RESUME_VAL]], i64 0
; CHECK-NEXT:    [[DOTSPLAT11:%.*]] = shufflevector <2 x i64> [[DOTSPLATINSERT10]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[INDUCTION12:%.*]] = add <2 x i64> [[DOTSPLAT11]], <i64 0, i64 1>
; CHECK-NEXT:    br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
; CHECK:       vec.epilog.vector.body:
; CHECK-NEXT:    [[INDEX9:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT17:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND13:%.*]] = phi <2 x i64> [ [[INDUCTION12]], [[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT15:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX16:%.*]] = add i64 [[START]], [[INDEX9]]
; CHECK-NEXT:    [[TMP8:%.*]] = add i64 [[OFFSET_IDX16]], 0
; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP8]]
; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i64, ptr [[TMP9]], i32 0
; CHECK-NEXT:    store <2 x i64> [[VEC_IND13]], ptr [[TMP10]], align 4
; CHECK-NEXT:    [[INDEX_NEXT17]] = add nuw i64 [[INDEX9]], 2
; CHECK-NEXT:    [[VEC_IND_NEXT15]] = add <2 x i64> [[VEC_IND13]], <i64 2, i64 2>
; CHECK-NEXT:    [[TMP11:%.*]] = icmp eq i64 [[INDEX_NEXT17]], [[N_VEC4]]
; CHECK-NEXT:    br i1 [[TMP11]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK:       vec.epilog.middle.block:
; CHECK-NEXT:    [[CMP_N8:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC4]]
; CHECK-NEXT:    br i1 [[CMP_N8]], label [[EXIT]], label [[VEC_EPILOG_SCALAR_PH]]
; CHECK:       vec.epilog.scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL7:%.*]] = phi i64 [ [[IND_END5]], [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[IND_END6]], [[VEC_EPILOG_ITER_CHECK]] ], [ [[START]], [[ITER_CHECK:%.*]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV_1:%.*]] = phi i64 [ [[BC_RESUME_VAL7]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_1_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[GEP_A:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[IV_1]]
; 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 ![0-9]+}}
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv.1 = phi i64 [ %start, %entry ], [ %iv.1.next, %loop ]
  %gep.A = getelementptr inbounds i64, ptr %A, i64 %iv.1
  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 void
}

define void @test_widen_induction_step_2(ptr %A, i64 %N, i32 %step) {
; CHECK-LABEL: @test_widen_induction_step_2(
; CHECK-NEXT:  iter.check:
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N:%.*]], 2
; 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]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label [[VEC_EPILOG_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[N]], 4
; CHECK-NEXT:    [[IND_END5:%.*]] = 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 <2 x i64> [ <i64 0, i64 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[STEP_ADD:%.*]] = add <2 x i64> [[VEC_IND]], <i64 2, i64 2>
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[INDEX]], 2
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i64, ptr [[A:%.*]], i64 [[TMP0]]
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP1]]
; CHECK-NEXT:    [[TMP4:%.*]] = add <2 x i64> [[VEC_IND]], <i64 10, i64 10>
; CHECK-NEXT:    [[TMP5:%.*]] = add <2 x i64> [[STEP_ADD]], <i64 10, i64 10>
; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i64, ptr [[TMP2]], i32 0
; CHECK-NEXT:    store <2 x i64> [[TMP4]], ptr [[TMP6]], align 4
; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr inbounds i64, ptr [[TMP2]], i32 2
; CHECK-NEXT:    store <2 x i64> [[TMP5]], ptr [[TMP7]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <2 x i64> [[STEP_ADD]], <i64 2, i64 2>
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[IND_END5]]
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK:       middle.block:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[IND_END5]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
; CHECK:       vec.epilog.iter.check:
; CHECK-NEXT:    [[N_VEC_REMAINING:%.*]] = sub i64 [[N]], [[IND_END5]]
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_VEC_REMAINING]], 2
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]]
; CHECK:       vec.epilog.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[IND_END5]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[IND_END5]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF3:%.*]] = urem i64 [[N]], 2
; CHECK-NEXT:    [[IND_END:%.*]] = sub i64 [[N]], [[N_MOD_VF3]]
; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[BC_RESUME_VAL]], i64 0
; CHECK-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <2 x i64> [[DOTSPLATINSERT]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[INDUCTION:%.*]] = add <2 x i64> [[DOTSPLAT]], <i64 0, i64 1>
; CHECK-NEXT:    br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
; CHECK:       vec.epilog.vector.body:
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT13:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND10:%.*]] = phi <2 x i64> [ [[INDUCTION]], [[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT12:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP9:%.*]] = add i64 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP9]]
; CHECK-NEXT:    [[TMP11:%.*]] = add <2 x i64> [[VEC_IND10]], <i64 10, i64 10>
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr inbounds i64, ptr [[TMP10]], i32 0
; CHECK-NEXT:    store <2 x i64> [[TMP11]], ptr [[TMP12]], align 4
; CHECK-NEXT:    [[INDEX_NEXT13]] = add nuw i64 [[OFFSET_IDX]], 2
; CHECK-NEXT:    [[VEC_IND_NEXT12]] = add <2 x i64> [[VEC_IND10]], <i64 2, i64 2>
; CHECK-NEXT:    [[TMP13:%.*]] = icmp eq i64 [[INDEX_NEXT13]], [[IND_END]]
; CHECK-NEXT:    br i1 [[TMP13]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK:       vec.epilog.middle.block:
; CHECK-NEXT:    [[CMP_N8:%.*]] = icmp eq i64 [[N]], [[IND_END]]
; CHECK-NEXT:    br i1 [[CMP_N8]], label [[EXIT]], label [[VEC_EPILOG_SCALAR_PH]]
; CHECK:       vec.epilog.scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL6:%.*]] = phi i64 [ [[IND_END]], [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[IND_END5]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[ITER_CHECK:%.*]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL7:%.*]] = phi i64 [ [[IND_END]], [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[IND_END5]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[ITER_CHECK]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV_1:%.*]] = phi i64 [ [[BC_RESUME_VAL6]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_1_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV_2:%.*]] = phi i64 [ [[BC_RESUME_VAL7]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_1_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    [[GEP_A:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[IV_1]]
; CHECK-NEXT:    [[ADD:%.*]] = add i64 [[IV_2]], 10
; CHECK-NEXT:    store i64 [[ADD]], ptr [[GEP_A]], align 4
; CHECK-NEXT:    [[IV_1_NEXT]] = add nuw nsw i64 [[IV_1]], 1
; CHECK-NEXT:    [[IV_2_NEXT:%.*]] = add nuw nsw i64 [[IV_1]], 2
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_1_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[EXIT]], label [[LOOP]], {{!llvm.loop ![0-9]+}}
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv.1 = phi i64 [ 0, %entry ], [ %iv.1.next, %loop ]
  %iv.2 = phi i64 [ 0, %entry ], [ %iv.1.next, %loop ]
  %gep.A = getelementptr inbounds i64, ptr %A, i64 %iv.1
  %add = add i64 %iv.2, 10
  store i64 %add, ptr %gep.A, align 4
  %iv.1.next = add nuw nsw i64 %iv.1, 1
  %iv.2.next = add nuw nsw i64 %iv.1, 2
  %exitcond = icmp eq i64 %iv.1.next, %N
  br i1 %exitcond, label %exit, label %loop

exit:
  ret void
}

define void @test_widen_extended_induction(ptr %dst) {
; CHECK-LABEL: @test_widen_extended_induction(
; CHECK-NEXT:  iter.check:
; CHECK-NEXT:    br i1 false, label [[VEC_EPILOG_SCALAR_PH:%.*]], label [[VECTOR_SCEVCHECK:%.*]]
; CHECK:       vector.scevcheck:
; 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 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_IND:%.*]] = phi <2 x i8> [ <i8 0, i8 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[STEP_ADD:%.*]] = add <2 x i8> [[VEC_IND]], <i8 2, i8 2>
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = trunc i32 [[INDEX]] to i8
; CHECK-NEXT:    [[TMP0:%.*]] = add i8 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[TMP1:%.*]] = add i8 [[OFFSET_IDX]], 2
; CHECK-NEXT:    [[TMP2:%.*]] = zext i8 [[TMP0]] to i64
; CHECK-NEXT:    [[TMP3:%.*]] = zext i8 [[TMP1]] to i64
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds [6 x i8], ptr [[DST:%.*]], i64 0, i64 [[TMP2]]
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds [6 x i8], ptr [[DST]], i64 0, i64 [[TMP3]]
; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i8, ptr [[TMP4]], i32 0
; CHECK-NEXT:    store <2 x i8> [[VEC_IND]], ptr [[TMP6]], align 1
; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr inbounds i8, ptr [[TMP4]], i32 2
; CHECK-NEXT:    store <2 x i8> [[STEP_ADD]], ptr [[TMP7]], align 1
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <2 x i8> [[STEP_ADD]], <i8 2, i8 2>
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i32 [[INDEX_NEXT]], 10000
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK:       middle.block:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 10000, 10000
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
; CHECK:       vec.epilog.iter.check:
; CHECK-NEXT:    br i1 true, label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]]
; CHECK:       vec.epilog.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i8 [ 16, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i32 [ 10000, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <2 x i8> poison, i8 [[BC_RESUME_VAL]], i64 0
; CHECK-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <2 x i8> [[DOTSPLATINSERT]], <2 x i8> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[INDUCTION:%.*]] = add <2 x i8> [[DOTSPLAT]], <i8 0, i8 1>
; 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_NEXT9:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND5:%.*]] = phi <2 x i8> [ [[INDUCTION]], [[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT7:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX8:%.*]] = trunc i32 [[INDEX4]] to i8
; CHECK-NEXT:    [[TMP9:%.*]] = add i8 [[OFFSET_IDX8]], 0
; CHECK-NEXT:    [[TMP10:%.*]] = zext i8 [[TMP9]] to i64
; CHECK-NEXT:    [[TMP11:%.*]] = getelementptr inbounds [6 x i8], ptr [[DST]], i64 0, i64 [[TMP10]]
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr inbounds i8, ptr [[TMP11]], i32 0
; CHECK-NEXT:    store <2 x i8> [[VEC_IND5]], ptr [[TMP12]], align 1
; CHECK-NEXT:    [[INDEX_NEXT9]] = add nuw i32 [[INDEX4]], 2
; CHECK-NEXT:    [[VEC_IND_NEXT7]] = add <2 x i8> [[VEC_IND5]], <i8 2, i8 2>
; CHECK-NEXT:    [[TMP13:%.*]] = icmp eq i32 [[INDEX_NEXT9]], 10000
; CHECK-NEXT:    br i1 [[TMP13]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK:       vec.epilog.middle.block:
; CHECK-NEXT:    [[CMP_N3:%.*]] = icmp eq i32 10000, 10000
; CHECK-NEXT:    br i1 [[CMP_N3]], label [[EXIT]], label [[VEC_EPILOG_SCALAR_PH]]
; CHECK:       vec.epilog.scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL2:%.*]] = phi i8 [ 16, [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ 16, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_SCEVCHECK]] ], [ 0, [[ITER_CHECK:%.*]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i8 [ [[BC_RESUME_VAL2]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV_EXT:%.*]] = zext i8 [[IV]] to i64
; CHECK-NEXT:    [[ARRAYIDX1449:%.*]] = getelementptr inbounds [6 x i8], ptr [[DST]], i64 0, i64 [[IV_EXT]]
; CHECK-NEXT:    store i8 [[IV]], ptr [[ARRAYIDX1449]], align 1
; CHECK-NEXT:    [[IV_NEXT]] = add i8 [[IV]], 1
; CHECK-NEXT:    [[IV_NEXT_EXT:%.*]] = zext i8 [[IV_NEXT]] to i32
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32 [[IV_NEXT_EXT]], 10000
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT]], label [[LOOP]], {{!llvm.loop ![0-9]+}}
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
  %iv.ext = zext i8 %iv to i64
  %arrayidx1449 = getelementptr inbounds [6 x i8], ptr %dst, i64 0, i64 %iv.ext
  store i8 %iv, ptr %arrayidx1449, align 1
  %iv.next = add i8 %iv, 1
  %iv.next.ext = zext i8 %iv.next to i32
  %ec = icmp eq i32  %iv.next.ext, 10000
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_widen_truncated_induction(ptr %A) {
; CHECK-LABEL: @test_widen_truncated_induction(
; 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 i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <2 x i8> [ <i8 0, i8 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[STEP_ADD:%.*]] = add <2 x i8> [[VEC_IND]], <i8 2, i8 2>
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[INDEX]], 2
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i8, ptr [[A:%.*]], i64 [[TMP0]]
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 [[TMP1]]
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i8, ptr [[TMP2]], i32 0
; CHECK-NEXT:    store <2 x i8> [[VEC_IND]], ptr [[TMP4]], align 1
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i8, ptr [[TMP2]], i32 2
; CHECK-NEXT:    store <2 x i8> [[STEP_ADD]], ptr [[TMP5]], align 1
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <2 x i8> [[STEP_ADD]], <i8 2, i8 2>
; CHECK-NEXT:    [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], 10000
; CHECK-NEXT:    br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK:       middle.block:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 10000, 10000
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
; CHECK:       vec.epilog.iter.check:
; CHECK-NEXT:    br i1 true, label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]]
; CHECK:       vec.epilog.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ 10000, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ 10000, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[TMP7:%.*]] = trunc i64 [[BC_RESUME_VAL]] to i8
; CHECK-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <2 x i8> poison, i8 [[TMP7]], i64 0
; CHECK-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <2 x i8> [[DOTSPLATINSERT]], <2 x i8> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[INDUCTION:%.*]] = add <2 x i8> [[DOTSPLAT]], <i8 0, i8 1>
; CHECK-NEXT:    br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
; CHECK:       vec.epilog.vector.body:
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT8:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND5:%.*]] = phi <2 x i8> [ [[INDUCTION]], [[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT7:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP8:%.*]] = add i64 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 [[TMP8]]
; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i8, ptr [[TMP9]], i32 0
; CHECK-NEXT:    store <2 x i8> [[VEC_IND5]], ptr [[TMP10]], align 1
; CHECK-NEXT:    [[INDEX_NEXT8]] = add nuw i64 [[OFFSET_IDX]], 2
; CHECK-NEXT:    [[VEC_IND_NEXT7]] = add <2 x i8> [[VEC_IND5]], <i8 2, i8 2>
; CHECK-NEXT:    [[TMP11:%.*]] = icmp eq i64 [[INDEX_NEXT8]], 10000
; CHECK-NEXT:    br i1 [[TMP11]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], {{!llvm.loop ![0-9]+}}
; CHECK:       vec.epilog.middle.block:
; CHECK-NEXT:    [[CMP_N3:%.*]] = icmp eq i64 10000, 10000
; CHECK-NEXT:    br i1 [[CMP_N3]], label [[EXIT]], label [[VEC_EPILOG_SCALAR_PH]]
; CHECK:       vec.epilog.scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL2:%.*]] = phi i64 [ 10000, [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ 10000, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[ITER_CHECK:%.*]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL2]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV_TRUNC:%.*]] = trunc i64 [[IV]] to i8
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 [[IV]]
; CHECK-NEXT:    store i8 [[IV_TRUNC]], ptr [[ARRAYIDX]], align 1
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[IV_NEXT]], 10000
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[LOOP]], label [[EXIT]], {{!llvm.loop ![0-9]+}}
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %iv.trunc = trunc i64 %iv to i8
  %arrayidx = getelementptr inbounds i8, ptr %A, i64 %iv
  store i8 %iv.trunc, ptr %arrayidx, align 1
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp ne i64 %iv.next, 10000
  br i1 %exitcond, label %loop, label %exit

exit:
  ret void
}