; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s  -loop-vectorize -force-vector-interleave=4 -pass-remarks='loop-vectorize' -disable-output -S 2>&1 | FileCheck %s --check-prefix=CHECK-REMARKS
; RUN: opt < %s  -loop-vectorize -force-vector-interleave=4 -S | FileCheck %s
; RUN: opt < %s  -loop-vectorize -force-vector-width=1 -force-vector-interleave=4 -S | FileCheck %s --check-prefix=CHECK-VF1

; 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() {
; CHECK-LABEL: @VF1-VPlanExe
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 false, label [[SCALAR_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:    [[INDUCTION:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT:    [[INDUCTION1:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[INDUCTION2:%.*]] = add i64 [[INDEX]], 2
; CHECK-NEXT:    [[INDUCTION3:%.*]] = add i64 [[INDEX]], 3
; CHECK-NEXT:    [[TMP0:%.*]] = icmp ule i64 [[INDUCTION]], 14
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ule i64 [[INDUCTION1]], 14
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ule i64 [[INDUCTION2]], 14
; CHECK-NEXT:    [[TMP3:%.*]] = icmp ule i64 [[INDUCTION3]], 14
; CHECK-NEXT:    [[INDEX_NEXT]] = add i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq i64 [[INDEX_NEXT]], 16
; CHECK-NEXT:    br i1 [[TMP4]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop !0
; CHECK:       middle.block:
; CHECK-NEXT:    br i1 true, label [[FOR_COND_CLEANUP:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ 16, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], 15
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_COND_CLEANUP]], label [[FOR_BODY]], !llvm.loop !2
;
entry:
  br label %for.body

for.cond.cleanup:
  ret void

for.body:
  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
  %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
}

define void @VF1-VPWidenCanonicalIVRecipeExe(double* %ptr1) {
; CHECK-LABEL: @VF1-VPWidenCanonicalIVRecipeExe
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[PTR2:%.*]] = getelementptr inbounds double, double* [[PTR1:%.*]], i64 15
; CHECK-NEXT:    br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[IND_END:%.*]] = getelementptr double, double* [[PTR1]], i64 16
; 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 double, double* [[PTR1]], i64 [[TMP0]]
; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[NEXT_GEP1:%.*]] = getelementptr double, double* [[PTR1]], i64 [[TMP1]]
; CHECK-NEXT:    [[TMP2:%.*]] = add i64 [[INDEX]], 2
; CHECK-NEXT:    [[NEXT_GEP2:%.*]] = getelementptr double, double* [[PTR1]], i64 [[TMP2]]
; CHECK-NEXT:    [[TMP3:%.*]] = add i64 [[INDEX]], 3
; CHECK-NEXT:    [[NEXT_GEP3:%.*]] = getelementptr double, double* [[PTR1]], i64 [[TMP3]]
; 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:    [[TMP4:%.*]] = icmp ule i64 [[VEC_IV]], 14
; CHECK-NEXT:    [[TMP5:%.*]] = icmp ule i64 [[VEC_IV4]], 14
; CHECK-NEXT:    [[TMP6:%.*]] = icmp ule i64 [[VEC_IV5]], 14
; CHECK-NEXT:    [[TMP7:%.*]] = icmp ule i64 [[VEC_IV6]], 14
; CHECK-NEXT:    [[INDEX_NEXT]] = add 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 !3
; CHECK:       middle.block:
; CHECK-NEXT:    br i1 true, label [[FOR_COND_CLEANUP:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi double* [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ [[PTR1]], [[ENTRY:%.*]] ]
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
; CHECK:       for.body:
; CHECK-NEXT:    [[ADDR:%.*]] = phi double* [ [[PTR:%.*]], [[FOR_BODY]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[PTR]] = getelementptr inbounds double, double* [[ADDR]], i64 1
; CHECK-NEXT:    [[COND:%.*]] = icmp eq double* [[PTR]], [[PTR2]]
; CHECK-NEXT:    br i1 [[COND]], label [[FOR_COND_CLEANUP]], label [[FOR_BODY]], !llvm.loop !4
;
entry:
  %ptr2 = getelementptr inbounds double, double* %ptr1, i64 15
  br label %for.body

for.cond.cleanup:
  ret void

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

; The following testcase is extended from the test of https://reviews.llvm.org/D80085
; Similar to two tests above, it is to check that fold-tail procedure produces correct scalar code when
; loop-vectorization is only unrolling but not vectorizing.

define void @pr45679(i32* %A) optsize {
; CHECK-VF1-LABEL: @pr45679
; CHECK-VF1-NEXT:  entry:
; CHECK-VF1-NEXT:    br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK-VF1:       vector.ph:
; CHECK-VF1-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK-VF1:       vector.body:
; CHECK-VF1-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_STORE_CONTINUE9:%.*]] ]
; CHECK-VF1-NEXT:    [[INDUCTION:%.*]] = add i32 [[INDEX]], 0
; CHECK-VF1-NEXT:    [[INDUCTION1:%.*]] = add i32 [[INDEX]], 1
; CHECK-VF1-NEXT:    [[INDUCTION2:%.*]] = add i32 [[INDEX]], 2
; CHECK-VF1-NEXT:    [[INDUCTION3:%.*]] = add i32 [[INDEX]], 3
; CHECK-VF1-NEXT:    [[TMP0:%.*]] = icmp ule i32 [[INDUCTION]], 13
; CHECK-VF1-NEXT:    [[TMP1:%.*]] = icmp ule i32 [[INDUCTION1]], 13
; CHECK-VF1-NEXT:    [[TMP2:%.*]] = icmp ule i32 [[INDUCTION2]], 13
; CHECK-VF1-NEXT:    [[TMP3:%.*]] = icmp ule i32 [[INDUCTION3]], 13
; CHECK-VF1-NEXT:    br i1 [[TMP0]], label [[PRED_STORE_IF:%.*]], label [[PRED_STORE_CONTINUE:%.*]]
; CHECK-VF1:       pred.store.if:
; CHECK-VF1-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[INDUCTION]]
; CHECK-VF1-NEXT:    store i32 13, i32* [[TMP4]], align 1
; CHECK-VF1-NEXT:    br label [[PRED_STORE_CONTINUE]]
; CHECK-VF1:       pred.store.continue:
; CHECK-VF1-NEXT:    br i1 [[TMP1]], label [[PRED_STORE_IF4:%.*]], label [[PRED_STORE_CONTINUE5:%.*]]
; CHECK-VF1:       pred.store.if4:
; CHECK-VF1-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i32, i32* [[A]], i32 [[INDUCTION1]]
; CHECK-VF1-NEXT:    store i32 13, i32* [[TMP5]], align 1
; CHECK-VF1-NEXT:    br label [[PRED_STORE_CONTINUE5]]
; CHECK-VF1:       pred.store.continue5:
; CHECK-VF1-NEXT:    br i1 [[TMP2]], label [[PRED_STORE_IF6:%.*]], label [[PRED_STORE_CONTINUE7:%.*]]
; CHECK-VF1:       pred.store.if6:
; CHECK-VF1-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i32, i32* [[A]], i32 [[INDUCTION2]]
; CHECK-VF1-NEXT:    store i32 13, i32* [[TMP6]], align 1
; CHECK-VF1-NEXT:    br label [[PRED_STORE_CONTINUE7]]
; CHECK-VF1:       pred.store.continue7:
; CHECK-VF1-NEXT:    br i1 [[TMP3]], label [[PRED_STORE_IF8:%.*]], label [[PRED_STORE_CONTINUE9]]
; CHECK-VF1:       pred.store.if8:
; CHECK-VF1-NEXT:    [[TMP7:%.*]] = getelementptr inbounds i32, i32* [[A]], i32 [[INDUCTION3]]
; CHECK-VF1-NEXT:    store i32 13, i32* [[TMP7]], align 1
; CHECK-VF1-NEXT:    br label [[PRED_STORE_CONTINUE9]]
; CHECK-VF1:       pred.store.continue9:
; CHECK-VF1-NEXT:    [[INDEX_NEXT]] = add i32 [[INDEX]], 4
; CHECK-VF1-NEXT:    [[TMP8:%.*]] = icmp eq i32 [[INDEX_NEXT]], 16
; CHECK-VF1-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]]
; CHECK-VF1:       middle.block:
; CHECK-VF1-NEXT:    br i1 true, label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK-VF1:       scalar.ph:
; CHECK-VF1-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i32 [ 16, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-VF1-NEXT:    br label [[LOOP:%.*]]
; CHECK-VF1:       loop:
; CHECK-VF1-NEXT:    [[RIV:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[RIVPLUS1:%.*]], [[LOOP]] ]
; CHECK-VF1-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A]], i32 [[RIV]]
; CHECK-VF1-NEXT:    store i32 13, i32* [[ARRAYIDX]], align 1
; CHECK-VF1-NEXT:    [[RIVPLUS1]] = add nuw nsw i32 [[RIV]], 1
; CHECK-VF1-NEXT:    [[COND:%.*]] = icmp eq i32 [[RIVPLUS1]], 14
; CHECK-VF1-NEXT:    br i1 [[COND]], label [[EXIT]], label [[LOOP]]
; CHECK-VF1:       exit:
; CHECK-VF1-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %riv = phi i32 [ 0, %entry ], [ %rivPlus1, %loop ]
  %arrayidx = getelementptr inbounds i32, i32* %A, i32 %riv
  store i32 13, i32* %arrayidx, align 1
  %rivPlus1 = add nuw nsw i32 %riv, 1
  %cond = icmp eq i32 %rivPlus1, 14
  br i1 %cond, label %exit, label %loop

exit:
  ret void
}