; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=loop-vectorize -force-vector-interleave=4 -prefer-predicate-over-epilogue=predicate-else-scalar-epilogue -pass-remarks='loop-vectorize' -disable-output -S 2>&1 | FileCheck %s --check-prefix=CHECK-REMARKS
; RUN: opt < %s -passes=loop-vectorize -force-vector-interleave=4 -prefer-predicate-over-epilogue=predicate-else-scalar-epilogue -S | FileCheck %s

; These tests are to check that fold-tail procedure produces correct scalar code when
; loop-vectorization is only unrolling but not vectorizing.

; CHECK-REMARKS:      remark: {{.*}} interleaved loop (interleaved count: 4)
; CHECK-REMARKS-NEXT: remark: {{.*}} interleaved loop (interleaved count: 4)
; CHECK-REMARKS-NOT:  remark: {{.*}} vectorized loop

define void @VF1-VPlanExe(ptr %dst) {
; CHECK-LABEL: @VF1-VPlanExe(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br 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:%.*]], [[PRED_STORE_CONTINUE6:%.*]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[TMP2:%.*]] = add i64 [[INDEX]], 2
; CHECK-NEXT:    [[TMP3:%.*]] = add i64 [[INDEX]], 3
; CHECK-NEXT:    [[TMP4:%.*]] = icmp ule i64 [[TMP0]], 14
; CHECK-NEXT:    [[TMP5:%.*]] = icmp ule i64 [[TMP1]], 14
; CHECK-NEXT:    [[TMP6:%.*]] = icmp ule i64 [[TMP2]], 14
; CHECK-NEXT:    [[TMP7:%.*]] = icmp ule i64 [[TMP3]], 14
; CHECK-NEXT:    br i1 [[TMP4]], label [[PRED_STORE_IF:%.*]], label [[PRED_STORE_CONTINUE:%.*]]
; CHECK:       pred.store.if:
; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds i32, ptr [[DST:%.*]], i64 [[TMP0]]
; CHECK-NEXT:    store i32 0, ptr [[TMP8]], align 4
; CHECK-NEXT:    br label [[PRED_STORE_CONTINUE]]
; CHECK:       pred.store.continue:
; CHECK-NEXT:    br i1 [[TMP5]], label [[PRED_STORE_IF1:%.*]], label [[PRED_STORE_CONTINUE2:%.*]]
; CHECK:       pred.store.if1:
; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i32, ptr [[DST]], i64 [[TMP1]]
; CHECK-NEXT:    store i32 0, ptr [[TMP9]], align 4
; CHECK-NEXT:    br label [[PRED_STORE_CONTINUE2]]
; CHECK:       pred.store.continue2:
; CHECK-NEXT:    br i1 [[TMP6]], label [[PRED_STORE_IF3:%.*]], label [[PRED_STORE_CONTINUE4:%.*]]
; CHECK:       pred.store.if3:
; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i32, ptr [[DST]], i64 [[TMP2]]
; CHECK-NEXT:    store i32 0, ptr [[TMP10]], align 4
; CHECK-NEXT:    br label [[PRED_STORE_CONTINUE4]]
; CHECK:       pred.store.continue4:
; CHECK-NEXT:    br i1 [[TMP7]], label [[PRED_STORE_IF5:%.*]], label [[PRED_STORE_CONTINUE6]]
; CHECK:       pred.store.if5:
; CHECK-NEXT:    [[TMP11:%.*]] = getelementptr inbounds i32, ptr [[DST]], i64 [[TMP3]]
; CHECK-NEXT:    store i32 0, ptr [[TMP11]], align 4
; CHECK-NEXT:    br label [[PRED_STORE_CONTINUE6]]
; CHECK:       pred.store.continue6:
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP12:%.*]] = icmp eq i64 [[INDEX_NEXT]], 16
; CHECK-NEXT:    br i1 [[TMP12]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
entry:
  br label %for.body

for.cond.cleanup:
  ret void

for.body:
  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
  %dst.ptr = getelementptr inbounds i32, ptr %dst, i64 %indvars.iv
  store i32 0, ptr %dst.ptr
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv.next, 15
  br i1 %exitcond, label %for.cond.cleanup, label %for.body
}

; Note: Most scalar pointer induction GEPs could be sunk into the conditional
;       blocks.
define void @VF1-VPWidenCanonicalIVRecipeExe(ptr %ptr1) {
; CHECK-LABEL: @VF1-VPWidenCanonicalIVRecipeExe(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[PTR2:%.*]] = getelementptr inbounds double, ptr [[PTR1:%.*]], i64 15
; CHECK-NEXT:    br 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:%.*]], [[PRED_STORE_CONTINUE12:%.*]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = mul i64 [[INDEX]], 8
; CHECK-NEXT:    [[TMP4:%.*]] = add i64 [[OFFSET_IDX]], 8
; CHECK-NEXT:    [[TMP5:%.*]] = add i64 [[OFFSET_IDX]], 16
; CHECK-NEXT:    [[TMP6:%.*]] = add i64 [[OFFSET_IDX]], 24
; CHECK-NEXT:    [[NEXT_GEP:%.*]] = getelementptr i8, ptr [[PTR1]], i64 [[OFFSET_IDX]]
; CHECK-NEXT:    [[NEXT_GEP1:%.*]] = getelementptr i8, ptr [[PTR1]], i64 [[TMP4]]
; CHECK-NEXT:    [[NEXT_GEP2:%.*]] = getelementptr i8, ptr [[PTR1]], i64 [[TMP5]]
; CHECK-NEXT:    [[NEXT_GEP3:%.*]] = getelementptr i8, ptr [[PTR1]], i64 [[TMP6]]
; CHECK-NEXT:    [[VEC_IV:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT:    [[VEC_IV4:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[VEC_IV5:%.*]] = add i64 [[INDEX]], 2
; CHECK-NEXT:    [[VEC_IV6:%.*]] = add i64 [[INDEX]], 3
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ule i64 [[VEC_IV]], 14
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ule i64 [[VEC_IV4]], 14
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ule i64 [[VEC_IV5]], 14
; CHECK-NEXT:    [[TMP3:%.*]] = icmp ule i64 [[VEC_IV6]], 14
; CHECK-NEXT:    br i1 [[TMP0]], label [[PRED_STORE_IF:%.*]], label [[PRED_STORE_CONTINUE:%.*]]
; CHECK:       pred.store.if:
; CHECK-NEXT:    store double 0.000000e+00, ptr [[NEXT_GEP]], align 8
; CHECK-NEXT:    br label [[PRED_STORE_CONTINUE]]
; CHECK:       pred.store.continue:
; CHECK-NEXT:    br i1 [[TMP1]], label [[PRED_STORE_IF7:%.*]], label [[PRED_STORE_CONTINUE8:%.*]]
; CHECK:       pred.store.if7:
; CHECK-NEXT:    store double 0.000000e+00, ptr [[NEXT_GEP1]], align 8
; CHECK-NEXT:    br label [[PRED_STORE_CONTINUE8]]
; CHECK:       pred.store.continue8:
; CHECK-NEXT:    br i1 [[TMP2]], label [[PRED_STORE_IF9:%.*]], label [[PRED_STORE_CONTINUE10:%.*]]
; CHECK:       pred.store.if9:
; CHECK-NEXT:    store double 0.000000e+00, ptr [[NEXT_GEP2]], align 8
; CHECK-NEXT:    br label [[PRED_STORE_CONTINUE10]]
; CHECK:       pred.store.continue10:
; CHECK-NEXT:    br i1 [[TMP3]], label [[PRED_STORE_IF11:%.*]], label [[PRED_STORE_CONTINUE12]]
; CHECK:       pred.store.if11:
; CHECK-NEXT:    store double 0.000000e+00, ptr [[NEXT_GEP3]], align 8
; CHECK-NEXT:    br label [[PRED_STORE_CONTINUE12]]
; CHECK:       pred.store.continue12:
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], 16
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
entry:
  %ptr2 = getelementptr inbounds double, ptr %ptr1, i64 15
  br label %for.body

for.cond.cleanup:
  ret void

for.body:
  %addr = phi ptr [ %ptr, %for.body ], [ %ptr1, %entry ]
  store double 0.0, ptr %addr
  %ptr = getelementptr inbounds double, ptr %addr, i64 1
  %cond = icmp eq ptr %ptr, %ptr2
  br i1 %cond, label %for.cond.cleanup, label %for.body
}

define i64 @live_out_scalar_vf(i64 %n) {
; CHECK-LABEL: @live_out_scalar_vf(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[N:%.*]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP0]], 16
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[TMP0]], 16
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF]]
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[STEP_ADD:%.*]] = add <4 x i64> [[VEC_IND]], splat (i64 4)
; CHECK-NEXT:    [[STEP_ADD_2:%.*]] = add <4 x i64> [[STEP_ADD]], splat (i64 4)
; CHECK-NEXT:    [[STEP_ADD_3:%.*]] = add <4 x i64> [[STEP_ADD_2]], splat (i64 4)
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 16
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <4 x i64> [[STEP_ADD_3]], splat (i64 4)
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i64> [[STEP_ADD_3]], i32 3
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT_FOR_PHI:%.*]] = extractelement <4 x i64> [[STEP_ADD_3]], i32 2
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[SCALAR_RECUR_INIT:%.*]] = phi i64 [ [[VECTOR_RECUR_EXTRACT]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[EXITVAL:%.*]] = phi i64 [ [[SCALAR_RECUR_INIT]], [[SCALAR_PH]] ], [ [[IV]], [[LOOP]] ]
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV]], [[N]]
; CHECK-NEXT:    br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    [[TMP19:%.*]] = phi i64 [ [[EXITVAL]], [[LOOP]] ], [ [[VECTOR_RECUR_EXTRACT_FOR_PHI]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[TMP19]]
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  ; Need to use a phi otherwise the header mask will use a
  ; VPWidenCanonicalIVRecipe instead of a VPScalarIVStepsRecipe.
  %exitval = phi i64 [ 0, %entry ], [ %iv, %loop ]
  %iv.next = add i64 %iv, 1
  %ec = icmp eq i64 %iv, %n
  br i1 %ec, label %exit, label %loop

exit:
  ret i64 %exitval
}

;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
; CHECK-REMARKS: {{.*}}