; LLVM IR from DionysiosB/CodeForces :: 2019A-MaxPlusSize (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 [5 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
  %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 = %66, %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 %69

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 0, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 0, 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 %15

15:                                               ; preds = %46, %13
  %16 = load i64, ptr %6, align 8, !tbaa !5
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = icmp slt i64 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %49

20:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %21 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %7)
  %22 = load i64, ptr %6, align 8, !tbaa !5
  %23 = srem i64 %22, 2
  %24 = icmp ne i64 %23, 0
  br i1 %24, label %25, label %35

25:                                               ; preds = %20
  %26 = load i64, ptr %4, align 8, !tbaa !5
  %27 = load i64, ptr %7, align 8, !tbaa !5
  %28 = icmp sgt i64 %26, %27
  br i1 %28, label %29, label %31

29:                                               ; preds = %25
  %30 = load i64, ptr %4, align 8, !tbaa !5
  br label %33

31:                                               ; preds = %25
  %32 = load i64, ptr %7, align 8, !tbaa !5
  br label %33

33:                                               ; preds = %31, %29
  %34 = phi i64 [ %30, %29 ], [ %32, %31 ]
  store i64 %34, ptr %4, align 8, !tbaa !5
  br label %45

35:                                               ; preds = %20
  %36 = load i64, ptr %5, align 8, !tbaa !5
  %37 = load i64, ptr %7, align 8, !tbaa !5
  %38 = icmp sgt i64 %36, %37
  br i1 %38, label %39, label %41

39:                                               ; preds = %35
  %40 = load i64, ptr %5, align 8, !tbaa !5
  br label %43

41:                                               ; preds = %35
  %42 = load i64, ptr %7, align 8, !tbaa !5
  br label %43

43:                                               ; preds = %41, %39
  %44 = phi i64 [ %40, %39 ], [ %42, %41 ]
  store i64 %44, ptr %5, align 8, !tbaa !5
  br label %45

45:                                               ; preds = %43, %33
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %46

46:                                               ; preds = %45
  %47 = load i64, ptr %6, align 8, !tbaa !5
  %48 = add nsw i64 %47, 1
  store i64 %48, ptr %6, align 8, !tbaa !5
  br label %15, !llvm.loop !9

49:                                               ; preds = %19
  %50 = load i64, ptr %3, align 8, !tbaa !5
  %51 = sdiv i64 %50, 2
  %52 = load i64, ptr %4, align 8, !tbaa !5
  %53 = add nsw i64 %52, %51
  store i64 %53, ptr %4, align 8, !tbaa !5
  %54 = load i64, ptr %3, align 8, !tbaa !5
  %55 = add nsw i64 %54, 1
  %56 = sdiv i64 %55, 2
  %57 = load i64, ptr %5, align 8, !tbaa !5
  %58 = add nsw i64 %57, %56
  store i64 %58, ptr %5, align 8, !tbaa !5
  %59 = load i64, ptr %4, align 8, !tbaa !5
  %60 = load i64, ptr %5, align 8, !tbaa !5
  %61 = icmp sgt i64 %59, %60
  br i1 %61, label %62, label %64

62:                                               ; preds = %49
  %63 = load i64, ptr %4, align 8, !tbaa !5
  br label %66

64:                                               ; preds = %49
  %65 = load i64, ptr %5, align 8, !tbaa !5
  br label %66

66:                                               ; preds = %64, %62
  %67 = phi i64 [ %63, %62 ], [ %65, %64 ]
  %68 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %67)
  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 !11

69:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %70 = load i32, ptr %1, align 4
  ret i32 %70
}

; 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 @printf(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 = 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 [5 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
  %.not24 = icmp eq i64 %5, 0
  br i1 %.not24, label %._crit_edge27, label %.lr.ph26

.lr.ph26:                                         ; preds = %0, %._crit_edge
  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 = icmp sgt i64 %8, 0
  br i1 %9, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %26, %.lr.ph26
  %.015.lcssa = phi i64 [ 0, %.lr.ph26 ], [ %.116, %26 ]
  %.014.lcssa = phi i64 [ 0, %.lr.ph26 ], [ %.1, %26 ]
  %.lcssa = phi i64 [ %8, %.lr.ph26 ], [ %28, %26 ]
  %10 = sdiv i64 %.lcssa, 2
  %11 = add nsw i64 %10, %.015.lcssa
  %12 = add nsw i64 %.lcssa, 1
  %13 = sdiv i64 %12, 2
  %14 = add nsw i64 %13, %.014.lcssa
  %15 = call i64 @llvm.smax.i64(i64 %11, i64 %14)
  %16 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %15)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %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_edge27, label %.lr.ph26, !llvm.loop !9

.lr.ph:                                           ; preds = %.lr.ph26, %26
  %.021 = phi i64 [ %27, %26 ], [ 0, %.lr.ph26 ]
  %.01420 = phi i64 [ %.1, %26 ], [ 0, %.lr.ph26 ]
  %.01519 = phi i64 [ %.116, %26 ], [ 0, %.lr.ph26 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %19 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %3)
  %20 = and i64 %.021, 1
  %.not18 = icmp eq i64 %20, 0
  %21 = load i64, ptr %3, align 8
  br i1 %.not18, label %24, label %22

22:                                               ; preds = %.lr.ph
  %23 = call i64 @llvm.smax.i64(i64 %.01519, i64 %21)
  br label %26

24:                                               ; preds = %.lr.ph
  %25 = call i64 @llvm.smax.i64(i64 %.01420, i64 %21)
  br label %26

26:                                               ; preds = %24, %22
  %.116 = phi i64 [ %23, %22 ], [ %.01519, %24 ]
  %.1 = phi i64 [ %.01420, %22 ], [ %25, %24 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  %27 = add nuw nsw i64 %.021, 1
  %28 = load i64, ptr %2, align 8, !tbaa !5
  %29 = icmp slt i64 %27, %28
  br i1 %29, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge27:                                    ; preds = %._crit_edge, %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 @printf(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: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass