; LLVM IR from DionysiosB/CodeForces :: 0800-0899 (862C-MahmoudAndEhabAndTheXor)

; 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 [8 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [12 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
  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
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2, ptr noundef %3)
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = icmp eq i64 %8, 1
  br i1 %9, label %10, label %14

10:                                               ; preds = %0
  %11 = call i32 @puts(ptr noundef @.str.1)
  %12 = load i64, ptr %3, align 8, !tbaa !5
  %13 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %12)
  br label %54

14:                                               ; preds = %0
  %15 = load i64, ptr %2, align 8, !tbaa !5
  %16 = icmp eq i64 %15, 2
  br i1 %16, label %17, label %27

17:                                               ; preds = %14
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = icmp sgt i64 %18, 0
  br i1 %19, label %20, label %24

20:                                               ; preds = %17
  %21 = call i32 @puts(ptr noundef @.str.1)
  %22 = load i64, ptr %3, align 8, !tbaa !5
  %23 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i64 noundef %22)
  br label %26

24:                                               ; preds = %17
  %25 = call i32 @puts(ptr noundef @.str.4)
  br label %26

26:                                               ; preds = %24, %20
  br label %53

27:                                               ; preds = %14
  %28 = call i32 @puts(ptr noundef @.str.1)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 262144, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 524288, 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
  br label %29

29:                                               ; preds = %41, %27
  %30 = load i64, ptr %6, align 8, !tbaa !5
  %31 = load i64, ptr %2, align 8, !tbaa !5
  %32 = sub nsw i64 %31, 3
  %33 = icmp slt i64 %30, %32
  br i1 %33, label %35, label %34

34:                                               ; preds = %29
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %44

35:                                               ; preds = %29
  %36 = load i64, ptr %6, align 8, !tbaa !5
  %37 = call i32 (ptr, ...) @printf(ptr noundef @.str.5, i64 noundef %36)
  %38 = load i64, ptr %6, align 8, !tbaa !5
  %39 = load i64, ptr %3, align 8, !tbaa !5
  %40 = xor i64 %39, %38
  store i64 %40, ptr %3, align 8, !tbaa !5
  br label %41

41:                                               ; preds = %35
  %42 = load i64, ptr %6, align 8, !tbaa !5
  %43 = add nsw i64 %42, 1
  store i64 %43, ptr %6, align 8, !tbaa !5
  br label %29, !llvm.loop !9

44:                                               ; preds = %34
  %45 = load i64, ptr %4, align 8, !tbaa !5
  %46 = load i64, ptr %3, align 8, !tbaa !5
  %47 = xor i64 %45, %46
  %48 = load i64, ptr %5, align 8, !tbaa !5
  %49 = load i64, ptr %4, align 8, !tbaa !5
  %50 = load i64, ptr %5, align 8, !tbaa !5
  %51 = xor i64 %49, %50
  %52 = call i32 (ptr, ...) @printf(ptr noundef @.str.6, i64 noundef %47, i64 noundef %48, i64 noundef %51)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %53

53:                                               ; preds = %44, %26
  br label %54

54:                                               ; preds = %53, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  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 @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"}


; 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 [8 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [12 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
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2)
  %4 = load i64, ptr %1, align 8, !tbaa !5
  switch i64 %4, label %18 [
    i64 1, label %5
    i64 2, label %9
  ]

5:                                                ; preds = %0
  %6 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.1)
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %7)
  br label %32

9:                                                ; preds = %0
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = icmp sgt i64 %10, 0
  br i1 %11, label %12, label %16

12:                                               ; preds = %9
  %13 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.1)
  %14 = load i64, ptr %2, align 8, !tbaa !5
  %15 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i64 noundef %14)
  br label %32

16:                                               ; preds = %9
  %17 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.4)
  br label %32

18:                                               ; preds = %0
  %19 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.1)
  %20 = load i64, ptr %1, align 8, !tbaa !5
  %21 = icmp sgt i64 %20, 3
  br i1 %21, label %.lr.ph, label %.._crit_edge_crit_edge

.._crit_edge_crit_edge:                           ; preds = %18
  %.pre = load i64, ptr %2, align 8, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %.._crit_edge_crit_edge
  %22 = phi i64 [ %.pre, %.._crit_edge_crit_edge ], [ %27, %.lr.ph ]
  %23 = xor i64 %22, 262144
  %24 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6, i64 noundef %23, i64 noundef 524288, i64 noundef 786432)
  br label %32

.lr.ph:                                           ; preds = %18, %.lr.ph
  %.09 = phi i64 [ %28, %.lr.ph ], [ 0, %18 ]
  %25 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5, i64 noundef %.09)
  %26 = load i64, ptr %2, align 8, !tbaa !5
  %27 = xor i64 %26, %.09
  store i64 %27, ptr %2, align 8, !tbaa !5
  %28 = add nuw nsw i64 %.09, 1
  %29 = load i64, ptr %1, align 8, !tbaa !5
  %30 = add nsw i64 %29, -3
  %31 = icmp slt i64 %28, %30
  br i1 %31, label %.lr.ph, label %._crit_edge, !llvm.loop !9

32:                                               ; preds = %._crit_edge, %16, %12, %5
  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"}


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