; LLVM IR from DionysiosB/CodeForces :: 1719B-MathematicalCircus (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 [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.4 = 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
  %9 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %11

11:                                               ; preds = %57, %55, %0
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = add nsw i64 %12, -1
  store i64 %13, ptr %2, align 8, !tbaa !5
  %14 = icmp ne i64 %12, 0
  br i1 %14, label %15, label %58

15:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4)
  %17 = load i64, ptr %4, align 8, !tbaa !5
  %18 = srem i64 %17, 4
  %19 = icmp eq i64 %18, 0
  br i1 %19, label %20, label %22

20:                                               ; preds = %15
  %21 = call i32 @puts(ptr noundef @.str.2)
  store i32 2, ptr %5, align 4
  br label %55, !llvm.loop !9

22:                                               ; preds = %15
  %23 = call i32 @puts(ptr noundef @.str.3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 1, ptr %6, align 8, !tbaa !5
  br label %24

24:                                               ; preds = %51, %22
  %25 = load i64, ptr %6, align 8, !tbaa !5
  %26 = load i64, ptr %3, align 8, !tbaa !5
  %27 = icmp sle i64 %25, %26
  br i1 %27, label %29, label %28

28:                                               ; preds = %24
  store i32 4, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %54

29:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %30 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %30, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %31 = load i64, ptr %6, align 8, !tbaa !5
  %32 = add nsw i64 %31, 1
  store i64 %32, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %33 = load i64, ptr %6, align 8, !tbaa !5
  %34 = load i64, ptr %4, align 8, !tbaa !5
  %35 = add nsw i64 %33, %34
  %36 = load i64, ptr %6, align 8, !tbaa !5
  %37 = add nsw i64 %36, 1
  %38 = mul nsw i64 %35, %37
  %39 = srem i64 %38, 4
  store i64 %39, ptr %9, align 8, !tbaa !5
  %40 = load i64, ptr %9, align 8, !tbaa !5
  %41 = icmp ne i64 %40, 0
  br i1 %41, label %42, label %46

42:                                               ; preds = %29
  %43 = load i64, ptr %8, align 8, !tbaa !5
  %44 = load i64, ptr %7, align 8, !tbaa !5
  %45 = call i32 (ptr, ...) @printf(ptr noundef @.str.4, i64 noundef %43, i64 noundef %44)
  br label %50

46:                                               ; preds = %29
  %47 = load i64, ptr %7, align 8, !tbaa !5
  %48 = load i64, ptr %8, align 8, !tbaa !5
  %49 = call i32 (ptr, ...) @printf(ptr noundef @.str.4, i64 noundef %47, i64 noundef %48)
  br label %50

50:                                               ; preds = %46, %42
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %51

51:                                               ; preds = %50
  %52 = load i64, ptr %6, align 8, !tbaa !5
  %53 = add nsw i64 %52, 2
  store i64 %53, ptr %6, align 8, !tbaa !5
  br label %24, !llvm.loop !11

54:                                               ; preds = %28
  store i32 0, ptr %5, align 4
  br label %55

55:                                               ; preds = %54, %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  %56 = load i32, ptr %5, align 4
  switch i32 %56, label %60 [
    i32 0, label %57
    i32 2, label %11
  ]

57:                                               ; preds = %55
  br label %11, !llvm.loop !9

58:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %59 = load i32, ptr %1, align 4
  ret i32 %59

60:                                               ; preds = %55
  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}


; 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 [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.4 = 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
  %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
  %.not16 = icmp eq i64 %5, 0
  br i1 %.not16, label %._crit_edge, label %.lr.ph17

.lr.ph17:                                         ; preds = %0, %.loopexit
  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
  %9 = and i64 %8, 3
  %10 = icmp eq i64 %9, 0
  br i1 %10, label %11, label %13

11:                                               ; preds = %.lr.ph17
  %12 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.2)
  br label %.loopexit, !llvm.loop !9

13:                                               ; preds = %.lr.ph17
  %14 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.3)
  %15 = load i64, ptr %2, align 8, !tbaa !5
  %.not1214 = icmp slt i64 %15, 1
  br i1 %.not1214, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %13, %25
  %.015 = phi i64 [ %26, %25 ], [ 1, %13 ]
  %16 = add nuw nsw i64 %.015, 1
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = add nsw i64 %17, %.015
  %19 = mul nsw i64 %18, %16
  %20 = and i64 %19, 3
  %.not13 = icmp eq i64 %20, 0
  br i1 %.not13, label %23, label %21

21:                                               ; preds = %.lr.ph
  %22 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4, i64 noundef %16, i64 noundef %.015)
  br label %25

23:                                               ; preds = %.lr.ph
  %24 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4, i64 noundef %.015, i64 noundef %16)
  br label %25

25:                                               ; preds = %23, %21
  %26 = add nuw nsw i64 %.015, 2
  %27 = load i64, ptr %2, align 8, !tbaa !5
  %.not12 = icmp sgt i64 %26, %27
  br i1 %.not12, label %.loopexit, label %.lr.ph, !llvm.loop !11

.loopexit:                                        ; preds = %25, %13, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %28 = load i64, ptr %1, align 8, !tbaa !5
  %29 = add nsw i64 %28, -1
  store i64 %29, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %28, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph17

._crit_edge:                                      ; preds = %.loopexit, %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}


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