; LLVM IR from DionysiosB/CodeForces :: 2091C-CombinationLock (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 [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [1 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 i32, align 4
  %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
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %8

8:                                                ; preds = %47, %45, %0
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = add nsw i64 %9, -1
  store i64 %10, ptr %2, align 8, !tbaa !5
  %11 = icmp ne i64 %9, 0
  br i1 %11, label %12, label %48

12:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = srem i64 %14, 2
  %16 = icmp eq i64 %15, 0
  br i1 %16, label %17, label %19

17:                                               ; preds = %12
  %18 = call i32 @puts(ptr noundef @.str.1)
  store i32 2, ptr %4, align 4
  br label %45, !llvm.loop !9

19:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 1, ptr %5, align 8, !tbaa !5
  br label %20

20:                                               ; preds = %28, %19
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = load i64, ptr %3, align 8, !tbaa !5
  %23 = icmp sle i64 %21, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %20
  store i32 4, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %31

25:                                               ; preds = %20
  %26 = load i64, ptr %5, align 8, !tbaa !5
  %27 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %26)
  br label %28

28:                                               ; preds = %25
  %29 = load i64, ptr %5, align 8, !tbaa !5
  %30 = add nsw i64 %29, 2
  store i64 %30, ptr %5, align 8, !tbaa !5
  br label %20, !llvm.loop !11

31:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 2, ptr %6, align 8, !tbaa !5
  br label %32

32:                                               ; preds = %40, %31
  %33 = load i64, ptr %6, align 8, !tbaa !5
  %34 = load i64, ptr %3, align 8, !tbaa !5
  %35 = icmp sle i64 %33, %34
  br i1 %35, label %37, label %36

36:                                               ; preds = %32
  store i32 7, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %43

37:                                               ; preds = %32
  %38 = load i64, ptr %6, align 8, !tbaa !5
  %39 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %38)
  br label %40

40:                                               ; preds = %37
  %41 = load i64, ptr %6, align 8, !tbaa !5
  %42 = add nsw i64 %41, 2
  store i64 %42, ptr %6, align 8, !tbaa !5
  br label %32, !llvm.loop !12

43:                                               ; preds = %36
  %44 = call i32 @puts(ptr noundef @.str.3)
  store i32 0, ptr %4, align 4
  br label %45

45:                                               ; preds = %43, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  %46 = load i32, ptr %4, align 4
  switch i32 %46, label %50 [
    i32 0, label %47
    i32 2, label %8
  ]

47:                                               ; preds = %45
  br label %8, !llvm.loop !9

48:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %49 = load i32, ptr %1, align 4
  ret i32 %49

50:                                               ; preds = %45
  unreachable
}

; 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 [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [1 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
  %.not16 = icmp eq i64 %4, 0
  br i1 %.not16, label %._crit_edge19, label %.lr.ph18

.lr.ph18:                                         ; preds = %0, %._crit_edge
  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)
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = and i64 %7, 1
  %9 = icmp eq i64 %8, 0
  br i1 %9, label %._crit_edge, label %.preheader10, !llvm.loop !9

.preheader10:                                     ; preds = %.lr.ph18
  %.not811 = icmp slt i64 %7, 1
  br i1 %.not811, label %._crit_edge, label %.lr.ph

.preheader:                                       ; preds = %.lr.ph
  %.not913 = icmp slt i64 %12, 2
  br i1 %.not913, label %._crit_edge, label %.lr.ph15

.lr.ph:                                           ; preds = %.preheader10, %.lr.ph
  %.0712 = phi i64 [ %11, %.lr.ph ], [ 1, %.preheader10 ]
  %10 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.0712)
  %11 = add nuw nsw i64 %.0712, 2
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %.not8 = icmp sgt i64 %11, %12
  br i1 %.not8, label %.preheader, label %.lr.ph, !llvm.loop !11

.lr.ph15:                                         ; preds = %.preheader, %.lr.ph15
  %.014 = phi i64 [ %14, %.lr.ph15 ], [ 2, %.preheader ]
  %13 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.014)
  %14 = add nuw nsw i64 %.014, 2
  %15 = load i64, ptr %2, align 8, !tbaa !5
  %.not9 = icmp sgt i64 %14, %15
  br i1 %.not9, label %._crit_edge, label %.lr.ph15, !llvm.loop !12

._crit_edge:                                      ; preds = %.lr.ph15, %.preheader, %.preheader10, %.lr.ph18
  %.str.3.sink = phi ptr [ @.str.1, %.lr.ph18 ], [ @.str.3, %.preheader10 ], [ @.str.3, %.preheader ], [ @.str.3, %.lr.ph15 ]
  %16 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %.str.3.sink)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %17 = load i64, ptr %1, align 8, !tbaa !5
  %18 = add nsw i64 %17, -1
  store i64 %18, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %17, 0
  br i1 %.not, label %._crit_edge19, label %.lr.ph18

._crit_edge19:                                    ; preds = %._crit_edge, %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 @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: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass