; LLVM IR from DionysiosB/CodeForces :: 2108B-SUMdamentalDecomposition (main)

; 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 [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 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
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %9

9:                                                ; preds = %72, %0
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = add nsw i64 %10, -1
  store i64 %11, ptr %2, align 8, !tbaa !5
  %12 = icmp ne i64 %10, 0
  br i1 %12, label %13, label %75

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4)
  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
  %15 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %15, ptr %6, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %19, %13
  %17 = load i64, ptr %6, align 8, !tbaa !5
  %18 = icmp ne i64 %17, 0
  br i1 %18, label %19, label %26

19:                                               ; preds = %16
  %20 = load i64, ptr %6, align 8, !tbaa !5
  %21 = srem i64 %20, 2
  %22 = load i64, ptr %5, align 8, !tbaa !5
  %23 = add nsw i64 %22, %21
  store i64 %23, ptr %5, align 8, !tbaa !5
  %24 = load i64, ptr %6, align 8, !tbaa !5
  %25 = sdiv i64 %24, 2
  store i64 %25, ptr %6, align 8, !tbaa !5
  br label %16, !llvm.loop !9

26:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 0, ptr %7, align 8, !tbaa !5
  %27 = load i64, ptr %3, align 8, !tbaa !5
  %28 = load i64, ptr %5, align 8, !tbaa !5
  %29 = icmp sle i64 %27, %28
  br i1 %29, label %30, label %32

30:                                               ; preds = %26
  %31 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %31, ptr %7, align 8, !tbaa !5
  br label %72

32:                                               ; preds = %26
  %33 = load i64, ptr %3, align 8, !tbaa !5
  %34 = load i64, ptr %5, align 8, !tbaa !5
  %35 = sub nsw i64 %33, %34
  %36 = srem i64 %35, 2
  %37 = icmp eq i64 %36, 0
  br i1 %37, label %38, label %44

38:                                               ; preds = %32
  %39 = load i64, ptr %4, align 8, !tbaa !5
  %40 = load i64, ptr %3, align 8, !tbaa !5
  %41 = add nsw i64 %39, %40
  %42 = load i64, ptr %5, align 8, !tbaa !5
  %43 = sub nsw i64 %41, %42
  store i64 %43, ptr %7, align 8, !tbaa !5
  br label %71

44:                                               ; preds = %32
  %45 = load i64, ptr %4, align 8, !tbaa !5
  %46 = icmp eq i64 %45, 0
  br i1 %46, label %47, label %56

47:                                               ; preds = %44
  %48 = load i64, ptr %3, align 8, !tbaa !5
  %49 = icmp eq i64 %48, 1
  br i1 %49, label %50, label %51

50:                                               ; preds = %47
  br label %54

51:                                               ; preds = %47
  %52 = load i64, ptr %3, align 8, !tbaa !5
  %53 = add nsw i64 %52, 3
  br label %54

54:                                               ; preds = %51, %50
  %55 = phi i64 [ -1, %50 ], [ %53, %51 ]
  store i64 %55, ptr %7, align 8, !tbaa !5
  br label %70

56:                                               ; preds = %44
  %57 = load i64, ptr %4, align 8, !tbaa !5
  %58 = icmp eq i64 %57, 1
  br i1 %58, label %59, label %62

59:                                               ; preds = %56
  %60 = load i64, ptr %3, align 8, !tbaa !5
  %61 = add nsw i64 %60, 3
  store i64 %61, ptr %7, align 8, !tbaa !5
  br label %69

62:                                               ; preds = %56
  %63 = load i64, ptr %4, align 8, !tbaa !5
  %64 = load i64, ptr %3, align 8, !tbaa !5
  %65 = add nsw i64 %63, %64
  %66 = load i64, ptr %5, align 8, !tbaa !5
  %67 = sub nsw i64 %65, %66
  %68 = add nsw i64 %67, 1
  store i64 %68, ptr %7, align 8, !tbaa !5
  br label %69

69:                                               ; preds = %62, %59
  br label %70

70:                                               ; preds = %69, %54
  br label %71

71:                                               ; preds = %70, %38
  br label %72

72:                                               ; preds = %71, %30
  %73 = load i64, ptr %7, align 8, !tbaa !5
  %74 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %73)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  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 %9, !llvm.loop !11

75:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %76 = load i32, ptr %1, align 4
  ret i32 %76
}

; 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

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

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

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", !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}


; 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 [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 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) #3
  %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
  %.not21 = icmp eq i64 %5, 0
  br i1 %.not21, label %._crit_edge24, label %.lr.ph23

.lr.ph23:                                         ; preds = %0, %31
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %8 = load i64, ptr %3, align 8, !tbaa !5
  %.not1417 = icmp eq i64 %8, 0
  br i1 %.not1417, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph23, %.lr.ph
  %.01019 = phi i64 [ %11, %.lr.ph ], [ %8, %.lr.ph23 ]
  %.01118 = phi i64 [ %10, %.lr.ph ], [ 0, %.lr.ph23 ]
  %9 = srem i64 %.01019, 2
  %10 = add nsw i64 %9, %.01118
  %11 = sdiv i64 %.01019, 2
  %.01019.off = add i64 %.01019, 1
  %.not14 = icmp ult i64 %.01019.off, 3
  br i1 %.not14, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph23
  %.011.lcssa16 = phi i64 [ 0, %.lr.ph23 ], [ %10, %.lr.ph ]
  %12 = load i64, ptr %2, align 8
  %.not15 = icmp sgt i64 %12, %.011.lcssa16
  br i1 %.not15, label %13, label %31

13:                                               ; preds = %._crit_edge
  %14 = sub nsw i64 %12, %.011.lcssa16
  %15 = and i64 %14, 1
  %16 = icmp eq i64 %15, 0
  br i1 %16, label %17, label %20

17:                                               ; preds = %13
  %18 = sub i64 %8, %.011.lcssa16
  %19 = add i64 %18, %12
  br label %31

20:                                               ; preds = %13
  switch i64 %8, label %27 [
    i64 0, label %21
    i64 1, label %25
  ]

21:                                               ; preds = %20
  %22 = icmp eq i64 %12, 1
  %23 = add nsw i64 %12, 3
  %24 = select i1 %22, i64 -1, i64 %23
  br label %31

25:                                               ; preds = %20
  %26 = add nsw i64 %12, 3
  br label %31

27:                                               ; preds = %20
  %28 = add i64 %8, 1
  %29 = sub i64 %28, %.011.lcssa16
  %30 = add i64 %29, %12
  br label %31

31:                                               ; preds = %._crit_edge, %17, %25, %27, %21
  %.0 = phi i64 [ %19, %17 ], [ %24, %21 ], [ %26, %25 ], [ %30, %27 ], [ %8, %._crit_edge ]
  %32 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.0)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %33 = load i64, ptr %1, align 8, !tbaa !5
  %34 = add nsw i64 %33, -1
  store i64 %34, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %33, 0
  br i1 %.not, label %._crit_edge24, label %.lr.ph23, !llvm.loop !11

._crit_edge24:                                    ; preds = %31, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  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: nofree nounwind
declare noundef i32 @printf(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

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 = { 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", !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}


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