; LLVM IR from DionysiosB/CodeForces :: 0600-0699 (639B-BearAndForgottenTree)

; 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 [13 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [9 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 i32, align 4
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2, ptr noundef %3, ptr noundef %4)
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = icmp sle i64 %10, 1
  br i1 %11, label %12, label %15

12:                                               ; preds = %0
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %14 = icmp sgt i64 %13, 2
  br i1 %14, label %20, label %15

15:                                               ; preds = %12, %0
  %16 = load i64, ptr %4, align 8, !tbaa !5
  %17 = mul nsw i64 2, %16
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = icmp slt i64 %17, %18
  br i1 %19, label %20, label %22

20:                                               ; preds = %15, %12
  %21 = call i32 @puts(ptr noundef @.str.1)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  br label %63

22:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 2, ptr %6, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %27, %22
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = add nsw i64 %24, -1
  store i64 %25, ptr %4, align 8, !tbaa !5
  %26 = icmp ne i64 %24, 0
  br i1 %26, label %27, label %36

27:                                               ; preds = %23
  %28 = load i64, ptr %6, align 8, !tbaa !5
  %29 = sub nsw i64 %28, 1
  %30 = load i64, ptr %6, align 8, !tbaa !5
  %31 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %29, i64 noundef %30)
  %32 = load i64, ptr %6, align 8, !tbaa !5
  %33 = add nsw i64 %32, 1
  store i64 %33, ptr %6, align 8, !tbaa !5
  %34 = load i64, ptr %3, align 8, !tbaa !5
  %35 = add nsw i64 %34, -1
  store i64 %35, ptr %3, align 8, !tbaa !5
  br label %23, !llvm.loop !9

36:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 2, ptr %8, align 8, !tbaa !5
  %37 = load i64, ptr %3, align 8, !tbaa !5
  %38 = icmp sgt i64 %37, 0
  br i1 %38, label %39, label %51

39:                                               ; preds = %36
  store i64 1, ptr %7, align 8, !tbaa !5
  store i64 1, ptr %8, align 8, !tbaa !5
  br label %40

40:                                               ; preds = %44, %39
  %41 = load i64, ptr %3, align 8, !tbaa !5
  %42 = add nsw i64 %41, -1
  store i64 %42, ptr %3, align 8, !tbaa !5
  %43 = icmp ne i64 %41, 0
  br i1 %43, label %44, label %50

44:                                               ; preds = %40
  %45 = load i64, ptr %7, align 8, !tbaa !5
  %46 = load i64, ptr %6, align 8, !tbaa !5
  %47 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %45, i64 noundef %46)
  %48 = load i64, ptr %6, align 8, !tbaa !5
  %49 = add nsw i64 %48, 1
  store i64 %49, ptr %6, align 8, !tbaa !5
  store i64 %48, ptr %7, align 8, !tbaa !5
  br label %40, !llvm.loop !11

50:                                               ; preds = %40
  br label %51

51:                                               ; preds = %50, %36
  br label %52

52:                                               ; preds = %56, %51
  %53 = load i64, ptr %6, align 8, !tbaa !5
  %54 = load i64, ptr %2, align 8, !tbaa !5
  %55 = icmp sle i64 %53, %54
  br i1 %55, label %56, label %62

56:                                               ; preds = %52
  %57 = load i64, ptr %8, align 8, !tbaa !5
  %58 = load i64, ptr %6, align 8, !tbaa !5
  %59 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %57, i64 noundef %58)
  %60 = load i64, ptr %6, align 8, !tbaa !5
  %61 = add nsw i64 %60, 1
  store i64 %61, ptr %6, align 8, !tbaa !5
  br label %52, !llvm.loop !12

62:                                               ; preds = %52
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %63

63:                                               ; preds = %62, %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %64 = load i32, ptr %1, align 4
  ret i32 %64
}

; 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 @puts(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}
!12 = distinct !{!12, !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 [13 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [9 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
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %5 = load i64, ptr %2, align 8, !tbaa !5
  %6 = icmp slt i64 %5, 2
  %7 = load i64, ptr %1, align 8
  %8 = icmp sgt i64 %7, 2
  %or.cond = select i1 %6, i1 %8, i1 false
  br i1 %or.cond, label %14, label %9

9:                                                ; preds = %0
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = shl nsw i64 %10, 1
  %12 = icmp slt i64 %11, %5
  br i1 %12, label %14, label %.preheader19

.preheader19:                                     ; preds = %9
  %13 = add nsw i64 %10, -1
  store i64 %13, ptr %3, align 8, !tbaa !5
  %.not20 = icmp eq i64 %10, 0
  br i1 %.not20, label %._crit_edge, label %.lr.ph

14:                                               ; preds = %0, %9
  %15 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.1)
  br label %.loopexit

.lr.ph:                                           ; preds = %.preheader19, %.lr.ph
  %.01321 = phi i64 [ %18, %.lr.ph ], [ 2, %.preheader19 ]
  %16 = add nsw i64 %.01321, -1
  %17 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %16, i64 noundef %.01321)
  %18 = add nuw nsw i64 %.01321, 1
  %19 = load i64, ptr %2, align 8, !tbaa !5
  %20 = add nsw i64 %19, -1
  store i64 %20, ptr %2, align 8, !tbaa !5
  %.pr = load i64, ptr %3, align 8, !tbaa !5
  %21 = add nsw i64 %.pr, -1
  store i64 %21, ptr %3, align 8, !tbaa !5
  %.not = icmp eq i64 %.pr, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %.preheader19
  %22 = phi i64 [ %5, %.preheader19 ], [ %20, %.lr.ph ]
  %.013.lcssa = phi i64 [ 2, %.preheader19 ], [ %18, %.lr.ph ]
  %23 = icmp sgt i64 %22, 0
  br i1 %23, label %.preheader, label %.loopexit18

.preheader:                                       ; preds = %._crit_edge
  %24 = add nsw i64 %22, -1
  store i64 %24, ptr %2, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %.preheader, %25
  %.01223 = phi i64 [ 1, %.preheader ], [ %.122, %25 ]
  %.122 = phi i64 [ %.013.lcssa, %.preheader ], [ %27, %25 ]
  %26 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.01223, i64 noundef %.122)
  %27 = add nuw nsw i64 %.122, 1
  %.pr17 = load i64, ptr %2, align 8, !tbaa !5
  %28 = add nsw i64 %.pr17, -1
  store i64 %28, ptr %2, align 8, !tbaa !5
  %.not15 = icmp eq i64 %.pr17, 0
  br i1 %.not15, label %.loopexit18, label %25, !llvm.loop !11

.loopexit18:                                      ; preds = %25, %._crit_edge
  %.2 = phi i64 [ %.013.lcssa, %._crit_edge ], [ %27, %25 ]
  %.0 = phi i64 [ 2, %._crit_edge ], [ 1, %25 ]
  %29 = load i64, ptr %1, align 8, !tbaa !5
  %.not1624 = icmp sgt i64 %.2, %29
  br i1 %.not1624, label %.loopexit, label %.lr.ph27

.lr.ph27:                                         ; preds = %.loopexit18, %.lr.ph27
  %.325 = phi i64 [ %31, %.lr.ph27 ], [ %.2, %.loopexit18 ]
  %30 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.0, i64 noundef %.325)
  %31 = add nsw i64 %.325, 1
  %32 = load i64, ptr %1, align 8, !tbaa !5
  %.not16.not = icmp slt i64 %.325, %32
  br i1 %.not16.not, label %.lr.ph27, label %.loopexit, !llvm.loop !12

.loopexit:                                        ; preds = %.lr.ph27, %.loopexit18, %14
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  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 @puts(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}
!12 = distinct !{!12, !10}


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