; LLVM IR from DionysiosB/CodeForces :: 0200-0299 (270B-Multithreading)

; 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 ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #5
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #5
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %9, i64 8)
  %11 = extractvalue { i64, i1 } %10, 1
  %12 = extractvalue { i64, i1 } %10, 0
  %13 = select i1 %11, i64 -1, i64 %12
  %14 = call noalias noundef nonnull ptr @_Znam(i64 noundef %13) #6
  store ptr %14, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  store i32 0, ptr %4, align 4, !tbaa !11
  br label %15

15:                                               ; preds = %27, %0
  %16 = load i32, ptr %4, align 4, !tbaa !11
  %17 = sext i32 %16 to i64
  %18 = load i64, ptr %2, align 8, !tbaa !5
  %19 = icmp slt i64 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  br label %30

21:                                               ; preds = %15
  %22 = load ptr, ptr %3, align 8, !tbaa !9
  %23 = load i32, ptr %4, align 4, !tbaa !11
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i64, ptr %22, i64 %24
  %26 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %25)
  br label %27

27:                                               ; preds = %21
  %28 = load i32, ptr %4, align 4, !tbaa !11
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %4, align 4, !tbaa !11
  br label %15, !llvm.loop !13

30:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  store i64 0, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %31 = load i64, ptr %2, align 8, !tbaa !5
  %32 = sub nsw i64 %31, 1
  store i64 %32, ptr %6, align 8, !tbaa !5
  br label %33

33:                                               ; preds = %51, %30
  %34 = load i64, ptr %6, align 8, !tbaa !5
  %35 = icmp sge i64 %34, 1
  br i1 %35, label %37, label %36

36:                                               ; preds = %33
  store i32 5, ptr %7, align 4
  br label %54

37:                                               ; preds = %33
  %38 = load ptr, ptr %3, align 8, !tbaa !9
  %39 = load i64, ptr %6, align 8, !tbaa !5
  %40 = sub nsw i64 %39, 1
  %41 = getelementptr inbounds i64, ptr %38, i64 %40
  %42 = load i64, ptr %41, align 8, !tbaa !5
  %43 = load ptr, ptr %3, align 8, !tbaa !9
  %44 = load i64, ptr %6, align 8, !tbaa !5
  %45 = getelementptr inbounds i64, ptr %43, i64 %44
  %46 = load i64, ptr %45, align 8, !tbaa !5
  %47 = icmp sgt i64 %42, %46
  br i1 %47, label %48, label %50

48:                                               ; preds = %37
  %49 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %49, ptr %5, align 8, !tbaa !5
  store i32 5, ptr %7, align 4
  br label %54

50:                                               ; preds = %37
  br label %51

51:                                               ; preds = %50
  %52 = load i64, ptr %6, align 8, !tbaa !5
  %53 = add nsw i64 %52, -1
  store i64 %53, ptr %6, align 8, !tbaa !5
  br label %33, !llvm.loop !15

54:                                               ; preds = %48, %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br label %55

55:                                               ; preds = %54
  %56 = load i64, ptr %5, align 8, !tbaa !5
  %57 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %56)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #5
  %58 = load i32, ptr %1, align 4
  ret i32 %58
}

; 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 speculatable willreturn memory(none)
declare { i64, i1 } @llvm.umul.with.overflow.i64(i64, i64) #3

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) #4

; 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { nobuiltin allocsize(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 #5 = { nounwind }
attributes #6 = { builtin allocsize(0) }

!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 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !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 [5 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  %2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %3 = load i64, ptr %1, align 8, !tbaa !5
  %4 = icmp ugt i64 %3, 2305843009213693951
  %5 = shl i64 %3, 3
  %6 = select i1 %4, i64 -1, i64 %5
  %7 = call noalias noundef nonnull ptr @_Znam(i64 noundef %6) #5
  %8 = icmp sgt i64 %3, 0
  br i1 %8, label %.lr.ph, label %.preheader

.preheader:                                       ; preds = %.lr.ph, %0
  %.lcssa = phi i64 [ %3, %0 ], [ %11, %.lr.ph ]
  %invariant.gep = getelementptr i8, ptr %7, i64 -16
  br label %13

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %9 = getelementptr inbounds i64, ptr %7, i64 %indvars.iv
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %9)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %11 = load i64, ptr %1, align 8, !tbaa !5
  %12 = icmp sgt i64 %11, %indvars.iv.next
  br i1 %12, label %.lr.ph, label %.preheader, !llvm.loop !9

13:                                               ; preds = %.preheader, %15
  %.0.in = phi i64 [ %.0, %15 ], [ %.lcssa, %.preheader ]
  %14 = icmp sgt i64 %.0.in, 1
  br i1 %14, label %15, label %20

15:                                               ; preds = %13
  %.0 = add nsw i64 %.0.in, -1
  %gep = getelementptr i64, ptr %invariant.gep, i64 %.0.in
  %16 = load i64, ptr %gep, align 8, !tbaa !5
  %17 = getelementptr inbounds i64, ptr %7, i64 %.0
  %18 = load i64, ptr %17, align 8, !tbaa !5
  %19 = icmp sgt i64 %16, %18
  br i1 %19, label %20, label %13, !llvm.loop !11

20:                                               ; preds = %15, %13
  %.012 = phi i64 [ 0, %13 ], [ %.0, %15 ]
  %21 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.012)
  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: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) local_unnamed_addr #3

; 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

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 = { 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 = { nobuiltin allocsize(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 #4 = { nounwind }
attributes #5 = { builtin allocsize(0) }

!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,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass