; LLVM IR from DionysiosB/CodeForces :: 1000-1099 (1010A-Fly)

; 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 [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 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 double, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  %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)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = sitofp i64 %10 to double
  store double %11, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 0, ptr %5, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %36, %0
  %13 = load i64, ptr %5, align 8, !tbaa !5
  %14 = load i64, ptr %2, align 8, !tbaa !5
  %15 = mul nsw i64 2, %14
  %16 = icmp slt i64 %13, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %12
  store i32 2, ptr %6, align 4
  br label %39

18:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %19 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %7)
  %20 = load i64, ptr %7, align 8, !tbaa !5
  %21 = icmp eq i64 %20, 1
  br i1 %21, label %22, label %24

22:                                               ; preds = %18
  %23 = call i32 @puts(ptr noundef @.str.1)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %6, align 4
  br label %33

24:                                               ; preds = %18
  %25 = load double, ptr %4, align 8, !tbaa !9
  %26 = load i64, ptr %7, align 8, !tbaa !5
  %27 = sitofp i64 %26 to double
  %28 = fmul double %25, %27
  %29 = load i64, ptr %7, align 8, !tbaa !5
  %30 = sub nsw i64 %29, 1
  %31 = sitofp i64 %30 to double
  %32 = fdiv double %28, %31
  store double %32, ptr %4, align 8, !tbaa !9
  store i32 0, ptr %6, align 4
  br label %33

33:                                               ; preds = %24, %22
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  %34 = load i32, ptr %6, align 4
  switch i32 %34, label %39 [
    i32 0, label %35
  ]

35:                                               ; preds = %33
  br label %36

36:                                               ; preds = %35
  %37 = load i64, ptr %5, align 8, !tbaa !5
  %38 = add nsw i64 %37, 1
  store i64 %38, ptr %5, align 8, !tbaa !5
  br label %12, !llvm.loop !11

39:                                               ; preds = %33, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  %40 = load i32, ptr %6, align 4
  switch i32 %40, label %47 [
    i32 2, label %41
  ]

41:                                               ; preds = %39
  %42 = load double, ptr %4, align 8, !tbaa !9
  %43 = load i64, ptr %3, align 8, !tbaa !5
  %44 = sitofp i64 %43 to double
  %45 = fsub double %42, %44
  %46 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, double noundef %45)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %6, align 4
  br label %47

47:                                               ; preds = %41, %39
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  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

declare i32 @puts(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 = !{!10, !10, i64 0}
!10 = !{!"double", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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 [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 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) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %6 = load i64, ptr %2, align 8, !tbaa !5
  %7 = sitofp i64 %6 to double
  %8 = load i64, ptr %1, align 8, !tbaa !5
  %.not1418 = icmp sgt i64 %8, 0
  br i1 %.not1418, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %12
  %.0720 = phi i64 [ %18, %12 ], [ 0, %0 ]
  %.0819 = phi double [ %17, %12 ], [ %7, %0 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %3)
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %.not = icmp eq i64 %10, 1
  br i1 %.not, label %.thread16, label %12

.thread16:                                        ; preds = %.lr.ph
  %11 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.1)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  br label %23

12:                                               ; preds = %.lr.ph
  %13 = sitofp i64 %10 to double
  %14 = fmul double %.0819, %13
  %15 = add nsw i64 %10, -1
  %16 = sitofp i64 %15 to double
  %17 = fdiv double %14, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  %18 = add nuw nsw i64 %.0720, 1
  %19 = load i64, ptr %1, align 8, !tbaa !5
  %20 = shl nsw i64 %19, 1
  %.not14 = icmp slt i64 %18, %20
  br i1 %.not14, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !9

._crit_edge.loopexit:                             ; preds = %12
  %.pre = load i64, ptr %2, align 8, !tbaa !5
  %.pre21 = sitofp i64 %.pre to double
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %0
  %.pre-phi = phi double [ %.pre21, %._crit_edge.loopexit ], [ %7, %0 ]
  %.08.lcssa = phi double [ %17, %._crit_edge.loopexit ], [ %7, %0 ]
  %21 = fsub double %.08.lcssa, %.pre-phi
  %22 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, double noundef %21)
  br label %23

23:                                               ; preds = %.thread16, %._crit_edge
  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
}

; 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 @puts(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

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"}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass