; LLVM IR from DionysiosB/CodeForces :: 0800-0899 (849A-OddsAndEnds)

; 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 [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 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 i8, align 1
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %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)
  call void @llvm.lifetime.start.p0(i64 1, ptr %3) #3
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = and i64 %8, 1
  %10 = icmp ne i64 %9, 0
  %11 = zext i1 %10 to i8
  store i8 %11, ptr %3, align 1, !tbaa !9
  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 = %40, %0
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = load i64, ptr %2, align 8, !tbaa !5
  %15 = icmp slt i64 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %12
  store i32 2, ptr %5, align 4
  br label %43

17:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %18 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %6)
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = icmp eq i64 %19, 0
  br i1 %20, label %21, label %26

21:                                               ; preds = %17
  %22 = load i64, ptr %6, align 8, !tbaa !5
  %23 = and i64 %22, 1
  %24 = icmp ne i64 %23, 0
  br i1 %24, label %26, label %25

25:                                               ; preds = %21
  store i8 0, ptr %3, align 1, !tbaa !9
  store i32 2, ptr %5, align 4
  br label %37

26:                                               ; preds = %21, %17
  %27 = load i64, ptr %4, align 8, !tbaa !5
  %28 = load i64, ptr %2, align 8, !tbaa !5
  %29 = sub nsw i64 %28, 1
  %30 = icmp eq i64 %27, %29
  br i1 %30, label %31, label %36

31:                                               ; preds = %26
  %32 = load i64, ptr %6, align 8, !tbaa !5
  %33 = and i64 %32, 1
  %34 = icmp ne i64 %33, 0
  br i1 %34, label %36, label %35

35:                                               ; preds = %31
  store i8 0, ptr %3, align 1, !tbaa !9
  store i32 2, ptr %5, align 4
  br label %37

36:                                               ; preds = %31, %26
  store i32 0, ptr %5, align 4
  br label %37

37:                                               ; preds = %36, %35, %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %38 = load i32, ptr %5, align 4
  switch i32 %38, label %43 [
    i32 0, label %39
  ]

39:                                               ; preds = %37
  br label %40

40:                                               ; preds = %39
  %41 = load i64, ptr %4, align 8, !tbaa !5
  %42 = add nsw i64 %41, 1
  store i64 %42, ptr %4, align 8, !tbaa !5
  br label %12, !llvm.loop !11

43:                                               ; preds = %37, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %44

44:                                               ; preds = %43
  %45 = load i8, ptr %3, align 1, !tbaa !9, !range !13, !noundef !14
  %46 = trunc i8 %45 to i1
  %47 = zext i1 %46 to i64
  %48 = select i1 %46, ptr @.str.1, ptr @.str.2
  %49 = call i32 @puts(ptr noundef %48)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %50 = load i32, ptr %1, align 4
  ret i32 %50
}

; 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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

declare i32 @puts(ptr noundef) #2

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 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{i8 0, i8 2}
!14 = !{}


; 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 [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 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
  %.fr = freeze i64 %4
  %5 = trunc i64 %.fr to i1
  %6 = icmp sgt i64 %.fr, 0
  br i1 %6, label %7, label %.loopexit

7:                                                ; preds = %0
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = and i64 %9, 1
  %.not.peel = icmp eq i64 %10, 0
  br i1 %.not.peel, label %.loopexit.thread, label %11

11:                                               ; preds = %7
  %12 = load i64, ptr %1, align 8, !tbaa !5
  %13 = icmp eq i64 %12, 1
  br i1 %13, label %14, label %17

14:                                               ; preds = %11
  %15 = load i64, ptr %2, align 8, !tbaa !5
  %16 = and i64 %15, 1
  %.not9.peel = icmp eq i64 %16, 0
  br i1 %.not9.peel, label %.loopexit.thread, label %.thread14

.thread14:                                        ; preds = %14
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  br i1 %5, label %29, label %30

17:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %18 = icmp sgt i64 %12, 1
  br i1 %18, label %.lr.ph.peel.next, label %.loopexit

.lr.ph.peel.next:                                 ; preds = %17, %26
  %.0712 = phi i64 [ %27, %26 ], [ 1, %17 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %19 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %20 = load i64, ptr %1, align 8, !tbaa !5
  %21 = add nsw i64 %20, -1
  %22 = icmp eq i64 %.0712, %21
  br i1 %22, label %23, label %26

23:                                               ; preds = %.lr.ph.peel.next
  %24 = load i64, ptr %2, align 8, !tbaa !5
  %25 = and i64 %24, 1
  %.not9 = icmp eq i64 %25, 0
  br i1 %.not9, label %.loopexit.thread, label %26

.loopexit.thread:                                 ; preds = %23, %7, %14
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  br label %30

26:                                               ; preds = %23, %.lr.ph.peel.next
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %27 = add nuw nsw i64 %.0712, 1
  %28 = icmp slt i64 %27, %20
  br i1 %28, label %.lr.ph.peel.next, label %.loopexit, !llvm.loop !9

.loopexit:                                        ; preds = %26, %17, %0
  br i1 %5, label %29, label %30

29:                                               ; preds = %.thread14, %.loopexit
  br label %30

30:                                               ; preds = %.thread14, %.loopexit.thread, %.loopexit, %29
  %31 = phi ptr [ @.str.1, %29 ], [ @.str.2, %.loopexit ], [ @.str.2, %.loopexit.thread ], [ @.str.2, %.thread14 ]
  %32 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %31)
  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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @puts(ptr nocapture noundef readonly) local_unnamed_addr #2

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, !11}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.peeled.count", i32 1}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopFullUnrollPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass