; LLVM IR from DionysiosB/CodeForces :: 1400-1499 (1425A-ArenaOfGreed)

; 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
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %6

6:                                                ; preds = %52, %0
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = add nsw i64 %7, -1
  store i64 %8, ptr %2, align 8, !tbaa !5
  %9 = icmp ne i64 %7, 0
  br i1 %9, label %10, label %55

10:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %11 = 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
  br label %12

12:                                               ; preds = %51, %10
  %13 = load i64, ptr %3, align 8, !tbaa !5
  %14 = icmp sgt i64 %13, 0
  br i1 %14, label %15, label %52

15:                                               ; preds = %12
  %16 = load i64, ptr %3, align 8, !tbaa !5
  %17 = srem i64 %16, 4
  %18 = icmp eq i64 %17, 2
  br i1 %18, label %22, label %19

19:                                               ; preds = %15
  %20 = load i64, ptr %3, align 8, !tbaa !5
  %21 = icmp eq i64 %20, 4
  br i1 %21, label %22, label %29

22:                                               ; preds = %19, %15
  %23 = load i64, ptr %3, align 8, !tbaa !5
  %24 = sdiv i64 %23, 2
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = add nsw i64 %25, %24
  store i64 %26, ptr %4, align 8, !tbaa !5
  %27 = load i64, ptr %3, align 8, !tbaa !5
  %28 = sdiv i64 %27, 2
  store i64 %28, ptr %3, align 8, !tbaa !5
  br label %34

29:                                               ; preds = %19
  %30 = load i64, ptr %4, align 8, !tbaa !5
  %31 = add nsw i64 %30, 1
  store i64 %31, ptr %4, align 8, !tbaa !5
  %32 = load i64, ptr %3, align 8, !tbaa !5
  %33 = add nsw i64 %32, -1
  store i64 %33, ptr %3, align 8, !tbaa !5
  br label %34

34:                                               ; preds = %29, %22
  %35 = load i64, ptr %3, align 8, !tbaa !5
  %36 = icmp sle i64 %35, 0
  br i1 %36, label %37, label %38

37:                                               ; preds = %34
  br label %52

38:                                               ; preds = %34
  %39 = load i64, ptr %3, align 8, !tbaa !5
  %40 = srem i64 %39, 4
  %41 = icmp eq i64 %40, 2
  br i1 %41, label %45, label %42

42:                                               ; preds = %38
  %43 = load i64, ptr %3, align 8, !tbaa !5
  %44 = icmp eq i64 %43, 4
  br i1 %44, label %45, label %48

45:                                               ; preds = %42, %38
  %46 = load i64, ptr %3, align 8, !tbaa !5
  %47 = sdiv i64 %46, 2
  store i64 %47, ptr %3, align 8, !tbaa !5
  br label %51

48:                                               ; preds = %42
  %49 = load i64, ptr %3, align 8, !tbaa !5
  %50 = add nsw i64 %49, -1
  store i64 %50, ptr %3, align 8, !tbaa !5
  br label %51

51:                                               ; preds = %48, %45
  br label %12, !llvm.loop !9

52:                                               ; preds = %37, %12
  %53 = load i64, ptr %4, align 8, !tbaa !5
  %54 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %53)
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %6, !llvm.loop !11

55:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  ret i32 0
}

; 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 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 [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
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i64, ptr %1, align 8, !tbaa !5
  %5 = add nsw i64 %4, -1
  store i64 %5, ptr %1, align 8, !tbaa !5
  %.not12 = icmp eq i64 %4, 0
  br i1 %.not12, label %._crit_edge15, label %.lr.ph14

.lr.ph14:                                         ; preds = %0, %21
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %.pr = load i64, ptr %2, align 8
  %7 = icmp sgt i64 %.pr, 0
  br i1 %7, label %.lr.ph, label %21

.lr.ph:                                           ; preds = %.lr.ph14, %15
  %.09 = phi i64 [ %.1, %15 ], [ 0, %.lr.ph14 ]
  %8 = phi i64 [ %storemerge8, %15 ], [ %.pr, %.lr.ph14 ]
  %9 = and i64 %8, 3
  %10 = icmp eq i64 %9, 2
  %11 = icmp eq i64 %8, 4
  %or.cond = or i1 %11, %10
  %12 = add nsw i64 %8, -1
  %13 = lshr exact i64 %8, 1
  %storemerge = select i1 %or.cond, i64 %13, i64 %12
  %.pn = select i1 %or.cond, i64 %13, i64 1
  %.1 = add nuw nsw i64 %.pn, %.09
  %14 = icmp eq i64 %storemerge, 0
  br i1 %14, label %._crit_edge, label %15

15:                                               ; preds = %.lr.ph
  %16 = and i64 %storemerge, 3
  %17 = icmp eq i64 %16, 2
  %18 = icmp eq i64 %storemerge, 4
  %or.cond3 = or i1 %18, %17
  %19 = add nsw i64 %storemerge, -1
  %20 = lshr exact i64 %storemerge, 1
  %storemerge8 = select i1 %or.cond3, i64 %20, i64 %19
  %.not19 = icmp eq i64 %storemerge8, 0
  br i1 %.not19, label %._crit_edge10, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph
  store i64 0, ptr %2, align 8, !tbaa !5
  br label %21

._crit_edge10:                                    ; preds = %15
  store i64 %storemerge8, ptr %2, align 8, !tbaa !5
  br label %21

21:                                               ; preds = %._crit_edge10, %._crit_edge, %.lr.ph14
  %.2 = phi i64 [ %.1, %._crit_edge ], [ %.1, %._crit_edge10 ], [ 0, %.lr.ph14 ]
  %22 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.2)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %23 = load i64, ptr %1, align 8, !tbaa !5
  %24 = add nsw i64 %23, -1
  store i64 %24, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %23, 0
  br i1 %.not, label %._crit_edge15, label %.lr.ph14, !llvm.loop !11

._crit_edge15:                                    ; preds = %21, %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 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: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass