; LLVM IR from DionysiosB/CodeForces :: 1600-1699 (1638B-OddSwapSort)

; 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 i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i8, align 1
  %7 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %9

9:                                                ; preds = %41, %0
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = add nsw i64 %10, -1
  store i64 %11, ptr %2, align 8, !tbaa !5
  %12 = icmp ne i64 %10, 0
  br i1 %12, label %13, label %47

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 -1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 -1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #3
  store i8 1, ptr %6, align 1, !tbaa !9
  br label %15

15:                                               ; preds = %40, %13
  %16 = load i64, ptr %3, align 8, !tbaa !5
  %17 = add nsw i64 %16, -1
  store i64 %17, ptr %3, align 8, !tbaa !5
  %18 = icmp ne i64 %16, 0
  br i1 %18, label %19, label %41

19:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %20 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %7)
  %21 = load i64, ptr %7, align 8, !tbaa !5
  %22 = srem i64 %21, 2
  %23 = icmp ne i64 %22, 0
  br i1 %23, label %24, label %32

24:                                               ; preds = %19
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = load i64, ptr %7, align 8, !tbaa !5
  %27 = icmp sle i64 %25, %26
  br i1 %27, label %28, label %30

28:                                               ; preds = %24
  %29 = load i64, ptr %7, align 8, !tbaa !5
  store i64 %29, ptr %4, align 8, !tbaa !5
  br label %31

30:                                               ; preds = %24
  store i8 0, ptr %6, align 1, !tbaa !9
  br label %31

31:                                               ; preds = %30, %28
  br label %40

32:                                               ; preds = %19
  %33 = load i64, ptr %5, align 8, !tbaa !5
  %34 = load i64, ptr %7, align 8, !tbaa !5
  %35 = icmp sle i64 %33, %34
  br i1 %35, label %36, label %38

36:                                               ; preds = %32
  %37 = load i64, ptr %7, align 8, !tbaa !5
  store i64 %37, ptr %5, align 8, !tbaa !5
  br label %39

38:                                               ; preds = %32
  store i8 0, ptr %6, align 1, !tbaa !9
  br label %39

39:                                               ; preds = %38, %36
  br label %40

40:                                               ; preds = %39, %31
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %15, !llvm.loop !11

41:                                               ; preds = %15
  %42 = load i8, ptr %6, align 1, !tbaa !9, !range !13, !noundef !14
  %43 = trunc i8 %42 to i1
  %44 = zext i1 %43 to i64
  %45 = select i1 %43, ptr @.str.1, ptr @.str.2
  %46 = call i32 @puts(ptr noundef %45)
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %9, !llvm.loop !15

47:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %48 = load i32, ptr %1, align 4
  ret i32 %48
}

; 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 = !{}
!15 = distinct !{!15, !12}


; 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
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  %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
  %.not19 = icmp eq i64 %5, 0
  br i1 %.not19, label %._crit_edge22, label %.lr.ph21

.lr.ph21:                                         ; preds = %0, %18
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = add nsw i64 %8, -1
  store i64 %9, ptr %2, align 8, !tbaa !5
  %.not1015 = icmp eq i64 %8, 0
  br i1 %.not1015, label %._crit_edge.thread, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph21, %15
  %.018 = phi i1 [ %..014, %15 ], [ true, %.lr.ph21 ]
  %.0417 = phi i64 [ %.15, %15 ], [ -1, %.lr.ph21 ]
  %.0616 = phi i64 [ %.17, %15 ], [ -1, %.lr.ph21 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %3)
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = and i64 %11, 1
  %.not11 = icmp eq i64 %12, 0
  br i1 %.not11, label %14, label %13

13:                                               ; preds = %.lr.ph
  %.06. = call i64 @llvm.smax.i64(i64 %.0616, i64 %11)
  br label %15

14:                                               ; preds = %.lr.ph
  %.04. = call i64 @llvm.smax.i64(i64 %.0417, i64 %11)
  br label %15

15:                                               ; preds = %14, %13
  %.0417.pn = phi i64 [ %.0417, %14 ], [ %.0616, %13 ]
  %.17 = phi i64 [ %.0616, %14 ], [ %.06., %13 ]
  %.15 = phi i64 [ %.04., %14 ], [ %.0417, %13 ]
  %.not12.sink = icmp sle i64 %.0417.pn, %11
  %.not12.sink.fr = freeze i1 %.not12.sink
  %..014 = select i1 %.not12.sink.fr, i1 %.018, i1 false
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  %16 = load i64, ptr %2, align 8, !tbaa !5
  %17 = add nsw i64 %16, -1
  store i64 %17, ptr %2, align 8, !tbaa !5
  %.not10 = icmp eq i64 %16, 0
  br i1 %.not10, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %15
  br i1 %..014, label %._crit_edge.thread, label %18

._crit_edge.thread:                               ; preds = %.lr.ph21, %._crit_edge
  br label %18

18:                                               ; preds = %._crit_edge, %._crit_edge.thread
  %19 = phi ptr [ @.str.1, %._crit_edge.thread ], [ @.str.2, %._crit_edge ]
  %20 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %19)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %21 = load i64, ptr %1, align 8, !tbaa !5
  %22 = add nsw i64 %21, -1
  store i64 %22, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %21, 0
  br i1 %.not, label %._crit_edge22, label %.lr.ph21, !llvm.loop !11

._crit_edge22:                                    ; preds = %18, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #4
  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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smax.i64(i64, i64) #3

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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: AggressiveInstCombinePass,CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass