; LLVM IR from DionysiosB/CodeForces :: 0200-0299 (291D-ParallelProgramming)

; 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 [8 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = 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 i32, align 4
  %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
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %50, %0
  %10 = load i64, ptr %4, align 8, !tbaa !5
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = icmp slt i64 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  store i32 2, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %53

14:                                               ; preds = %9
  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 = %44, %14
  %16 = load i64, ptr %6, align 8, !tbaa !5
  %17 = load i64, ptr %2, align 8, !tbaa !5
  %18 = sub nsw i64 %17, 1
  %19 = icmp slt i64 %16, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %15
  store i32 5, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %47

21:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 0, ptr %7, align 8, !tbaa !5
  %22 = load i64, ptr %2, align 8, !tbaa !5
  %23 = load i64, ptr %6, align 8, !tbaa !5
  %24 = sub nsw i64 %22, %23
  %25 = sub nsw i64 %24, 2
  %26 = load i64, ptr %4, align 8, !tbaa !5
  %27 = trunc i64 %26 to i32
  %28 = shl i32 1, %27
  %29 = sext i32 %28 to i64
  %30 = and i64 %25, %29
  %31 = icmp ne i64 %30, 0
  br i1 %31, label %32, label %39

32:                                               ; preds = %21
  %33 = load i64, ptr %2, align 8, !tbaa !5
  %34 = load i64, ptr %4, align 8, !tbaa !5
  %35 = trunc i64 %34 to i32
  %36 = shl i32 1, %35
  %37 = sext i32 %36 to i64
  %38 = sub nsw i64 %33, %37
  store i64 %38, ptr %7, align 8, !tbaa !5
  br label %41

39:                                               ; preds = %21
  %40 = load i64, ptr %2, align 8, !tbaa !5
  store i64 %40, ptr %7, align 8, !tbaa !5
  br label %41

41:                                               ; preds = %39, %32
  %42 = load i64, ptr %7, align 8, !tbaa !5
  %43 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %42)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %44

44:                                               ; preds = %41
  %45 = load i64, ptr %6, align 8, !tbaa !5
  %46 = add nsw i64 %45, 1
  store i64 %46, ptr %6, align 8, !tbaa !5
  br label %15, !llvm.loop !9

47:                                               ; preds = %20
  %48 = load i64, ptr %2, align 8, !tbaa !5
  %49 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %48)
  br label %50

50:                                               ; preds = %47
  %51 = load i64, ptr %4, align 8, !tbaa !5
  %52 = add nsw i64 %51, 1
  store i64 %52, ptr %4, align 8, !tbaa !5
  br label %9, !llvm.loop !11

53:                                               ; preds = %13
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %54 = load i32, ptr %1, align 4
  ret i32 %54
}

; 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 @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 [8 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = 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
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2)
  %4 = load i64, ptr %2, align 8, !tbaa !5
  %5 = icmp sgt i64 %4, 0
  br i1 %5, label %.preheader, label %._crit_edge13

.preheader:                                       ; preds = %0, %._crit_edge
  %.01012 = phi i64 [ %12, %._crit_edge ], [ 0, %0 ]
  %6 = load i64, ptr %1, align 8, !tbaa !5
  %7 = icmp sgt i64 %6, 1
  br i1 %7, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader
  %8 = trunc i64 %.01012 to i32
  %9 = shl nuw i32 1, %8
  %10 = sext i32 %9 to i64
  br label %15

._crit_edge13:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  ret i32 0

._crit_edge:                                      ; preds = %15, %.preheader
  %.lcssa = phi i64 [ %6, %.preheader ], [ %22, %15 ]
  %11 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.lcssa)
  %12 = add nuw nsw i64 %.01012, 1
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %14 = icmp slt i64 %12, %13
  br i1 %14, label %.preheader, label %._crit_edge13, !llvm.loop !9

15:                                               ; preds = %.lr.ph, %15
  %16 = phi i64 [ %6, %.lr.ph ], [ %22, %15 ]
  %.0911 = phi i64 [ 0, %.lr.ph ], [ %21, %15 ]
  %reass.sub = sub i64 %16, %.0911
  %17 = add i64 %reass.sub, -2
  %18 = and i64 %17, %10
  %.not = icmp eq i64 %18, 0
  %19 = select i1 %.not, i64 0, i64 %10
  %.0 = sub nsw i64 %16, %19
  %20 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.0)
  %21 = add nuw nsw i64 %.0911, 1
  %22 = load i64, ptr %1, align 8, !tbaa !5
  %23 = add nsw i64 %22, -1
  %24 = icmp slt i64 %21, %23
  br i1 %24, label %15, label %._crit_edge, !llvm.loop !11
}

; 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 @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,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass