; LLVM IR from DionysiosB/CodeForces :: 1600-1699 (1609A-DivideAndMultiply)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %11

11:                                               ; preds = %62, %0
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = add nsw i64 %12, -1
  store i64 %13, ptr %2, align 8, !tbaa !5
  %14 = icmp ne i64 %12, 0
  br i1 %14, label %15, label %68

15:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 0, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 0, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 0, ptr %7, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %47, %15
  %18 = load i64, ptr %7, align 8, !tbaa !5
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = icmp slt i64 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %50

22:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %23 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %8)
  br label %24

24:                                               ; preds = %28, %22
  %25 = load i64, ptr %8, align 8, !tbaa !5
  %26 = srem i64 %25, 2
  %27 = icmp eq i64 %26, 0
  br i1 %27, label %28, label %33

28:                                               ; preds = %24
  %29 = load i64, ptr %8, align 8, !tbaa !5
  %30 = sdiv i64 %29, 2
  store i64 %30, ptr %8, align 8, !tbaa !5
  %31 = load i64, ptr %5, align 8, !tbaa !5
  %32 = add nsw i64 %31, 1
  store i64 %32, ptr %5, align 8, !tbaa !5
  br label %24, !llvm.loop !9

33:                                               ; preds = %24
  %34 = load i64, ptr %8, align 8, !tbaa !5
  %35 = load i64, ptr %4, align 8, !tbaa !5
  %36 = icmp sgt i64 %34, %35
  br i1 %36, label %37, label %42

37:                                               ; preds = %33
  %38 = load i64, ptr %4, align 8, !tbaa !5
  %39 = load i64, ptr %6, align 8, !tbaa !5
  %40 = add nsw i64 %39, %38
  store i64 %40, ptr %6, align 8, !tbaa !5
  %41 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %41, ptr %4, align 8, !tbaa !5
  br label %46

42:                                               ; preds = %33
  %43 = load i64, ptr %8, align 8, !tbaa !5
  %44 = load i64, ptr %6, align 8, !tbaa !5
  %45 = add nsw i64 %44, %43
  store i64 %45, ptr %6, align 8, !tbaa !5
  br label %46

46:                                               ; preds = %42, %37
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %47

47:                                               ; preds = %46
  %48 = load i64, ptr %7, align 8, !tbaa !5
  %49 = add nsw i64 %48, 1
  store i64 %49, ptr %7, align 8, !tbaa !5
  br label %17, !llvm.loop !11

50:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  store i64 0, ptr %9, align 8, !tbaa !5
  br label %51

51:                                               ; preds = %59, %50
  %52 = load i64, ptr %9, align 8, !tbaa !5
  %53 = load i64, ptr %5, align 8, !tbaa !5
  %54 = icmp slt i64 %52, %53
  br i1 %54, label %56, label %55

55:                                               ; preds = %51
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  br label %62

56:                                               ; preds = %51
  %57 = load i64, ptr %4, align 8, !tbaa !5
  %58 = mul nsw i64 %57, 2
  store i64 %58, ptr %4, align 8, !tbaa !5
  br label %59

59:                                               ; preds = %56
  %60 = load i64, ptr %9, align 8, !tbaa !5
  %61 = add nsw i64 %60, 1
  store i64 %61, ptr %9, align 8, !tbaa !5
  br label %51, !llvm.loop !12

62:                                               ; preds = %55
  %63 = load i64, ptr %4, align 8, !tbaa !5
  %64 = load i64, ptr %6, align 8, !tbaa !5
  %65 = add nsw i64 %64, %63
  store i64 %65, ptr %6, align 8, !tbaa !5
  %66 = load i64, ptr %6, align 8, !tbaa !5
  %67 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %66)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %11, !llvm.loop !13

68:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %69 = load i32, ptr %1, align 4
  ret i32 %69
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

declare i32 @printf(ptr noundef, ...) #2

attributes #0 = { mustprogress norecurse uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}
!13 = distinct !{!13, !10}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %6 = add nsw i64 %5, -1
  store i64 %6, ptr %1, align 8, !tbaa !5
  %.not40 = icmp eq i64 %5, 0
  br i1 %.not40, label %._crit_edge43, label %.lr.ph42

.lr.ph42:                                         ; preds = %0, %._crit_edge38
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = icmp sgt i64 %8, 0
  br i1 %9, label %.lr.ph31, label %._crit_edge38

.preheader:                                       ; preds = %._crit_edge
  %10 = icmp sgt i64 %.118.lcssa, 0
  br i1 %10, label %.lr.ph37.preheader, label %._crit_edge38

.lr.ph37.preheader:                               ; preds = %.preheader
  %xtraiter = and i64 %.118.lcssa, 7
  %11 = icmp ult i64 %.118.lcssa, 8
  br i1 %11, label %._crit_edge38.loopexit.unr-lcssa, label %.lr.ph37.preheader.new

.lr.ph37.preheader.new:                           ; preds = %.lr.ph37.preheader
  %unroll_iter = and i64 %.118.lcssa, 9223372036854775800
  br label %.lr.ph37

.lr.ph31:                                         ; preds = %.lr.ph42, %._crit_edge
  %.01529 = phi i64 [ %20, %._crit_edge ], [ 0, %.lr.ph42 ]
  %.01628 = phi i64 [ %.1, %._crit_edge ], [ 0, %.lr.ph42 ]
  %.01727 = phi i64 [ %.118.lcssa, %._crit_edge ], [ 0, %.lr.ph42 ]
  %.01926 = phi i64 [ %..019, %._crit_edge ], [ 0, %.lr.ph42 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %3)
  %.promoted = load i64, ptr %3, align 8, !tbaa !5
  %13 = and i64 %.promoted, 1
  %14 = icmp eq i64 %13, 0
  br i1 %14, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph31, %.lr.ph
  %.11823 = phi i64 [ %17, %.lr.ph ], [ %.01727, %.lr.ph31 ]
  %15 = phi i64 [ %16, %.lr.ph ], [ %.promoted, %.lr.ph31 ]
  %16 = ashr exact i64 %15, 1
  %17 = add nsw i64 %.11823, 1
  %18 = and i64 %15, 2
  %19 = icmp eq i64 %18, 0
  br i1 %19, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph31
  %.118.lcssa = phi i64 [ %.01727, %.lr.ph31 ], [ %17, %.lr.ph ]
  %.lcssa = phi i64 [ %.promoted, %.lr.ph31 ], [ %16, %.lr.ph ]
  %..019 = call i64 @llvm.smax.i64(i64 %.lcssa, i64 %.01926)
  %.019. = call i64 @llvm.smin.i64(i64 %.lcssa, i64 %.01926)
  %.1 = add nsw i64 %.019., %.01628
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  %20 = add nuw nsw i64 %.01529, 1
  %21 = load i64, ptr %2, align 8, !tbaa !5
  %22 = icmp slt i64 %20, %21
  br i1 %22, label %.lr.ph31, label %.preheader, !llvm.loop !11

._crit_edge38.loopexit.unr-lcssa:                 ; preds = %.lr.ph37, %.lr.ph37.preheader
  %.lcssa59.ph = phi i64 [ poison, %.lr.ph37.preheader ], [ %28, %.lr.ph37 ]
  %.235.unr = phi i64 [ %..019, %.lr.ph37.preheader ], [ %28, %.lr.ph37 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge38, label %.lr.ph37.epil

.lr.ph37.epil:                                    ; preds = %._crit_edge38.loopexit.unr-lcssa, %.lr.ph37.epil
  %.235.epil = phi i64 [ %23, %.lr.ph37.epil ], [ %.235.unr, %._crit_edge38.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph37.epil ], [ 0, %._crit_edge38.loopexit.unr-lcssa ]
  %23 = shl nuw nsw i64 %.235.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge38, label %.lr.ph37.epil, !llvm.loop !12

._crit_edge38:                                    ; preds = %._crit_edge38.loopexit.unr-lcssa, %.lr.ph37.epil, %.lr.ph42, %.preheader
  %.016.lcssa50 = phi i64 [ %.1, %.preheader ], [ 0, %.lr.ph42 ], [ %.1, %.lr.ph37.epil ], [ %.1, %._crit_edge38.loopexit.unr-lcssa ]
  %.2.lcssa = phi i64 [ %..019, %.preheader ], [ 0, %.lr.ph42 ], [ %.lcssa59.ph, %._crit_edge38.loopexit.unr-lcssa ], [ %23, %.lr.ph37.epil ]
  %24 = add nsw i64 %.2.lcssa, %.016.lcssa50
  %25 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %24)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %26 = load i64, ptr %1, align 8, !tbaa !5
  %27 = add nsw i64 %26, -1
  store i64 %27, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %26, 0
  br i1 %.not, label %._crit_edge43, label %.lr.ph42, !llvm.loop !14

.lr.ph37:                                         ; preds = %.lr.ph37, %.lr.ph37.preheader.new
  %.235 = phi i64 [ %..019, %.lr.ph37.preheader.new ], [ %28, %.lr.ph37 ]
  %niter = phi i64 [ 0, %.lr.ph37.preheader.new ], [ %niter.next.7, %.lr.ph37 ]
  %28 = shl i64 %.235, 8
  %niter.next.7 = add i64 %niter, 8
  %niter.ncmp.7 = icmp eq i64 %niter.next.7, %unroll_iter
  br i1 %niter.ncmp.7, label %._crit_edge38.loopexit.unr-lcssa, label %.lr.ph37, !llvm.loop !15

._crit_edge43:                                    ; preds = %._crit_edge38, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #4
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smax.i64(i64, i64) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smin.i64(i64, i64) #3

attributes #0 = { mustprogress nofree norecurse nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.unroll.disable"}
!14 = distinct !{!14, !10}
!15 = distinct !{!15, !10}


; Effective O3 passes: CorrelatedValuePropagationPass,DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass