; LLVM IR from Shah-Shishir/Codeforces-Solutions :: 1076B. Divisor Subtraction (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 [5 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 nounwind uwtable
declare dso_local noundef zeroext i1 @_Z7isPrimex(i64 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  br label %4

4:                                                ; preds = %45, %0
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  %6 = icmp ne i32 %5, -1
  br i1 %6, label %7, label %46

7:                                                ; preds = %4
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = and i64 %8, 1
  %10 = icmp ne i64 %9, 0
  br i1 %10, label %11, label %41

11:                                               ; preds = %7
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = call noundef zeroext i1 @_Z7isPrimex(i64 noundef %12)
  br i1 %13, label %14, label %16

14:                                               ; preds = %11
  %15 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  br label %40

16:                                               ; preds = %11
  store i64 3, ptr %3, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %36, %16
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = mul nsw i64 %18, %19
  %21 = load i64, ptr %2, align 8, !tbaa !5
  %22 = icmp sle i64 %20, %21
  br i1 %22, label %23, label %39

23:                                               ; preds = %17
  %24 = load i64, ptr %2, align 8, !tbaa !5
  %25 = load i64, ptr %3, align 8, !tbaa !5
  %26 = srem i64 %24, %25
  %27 = icmp eq i64 %26, 0
  br i1 %27, label %28, label %35

28:                                               ; preds = %23
  %29 = load i64, ptr %2, align 8, !tbaa !5
  %30 = load i64, ptr %3, align 8, !tbaa !5
  %31 = sub nsw i64 %29, %30
  %32 = sdiv i64 %31, 2
  %33 = add nsw i64 %32, 1
  %34 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %33)
  br label %39

35:                                               ; preds = %23
  br label %36

36:                                               ; preds = %35
  %37 = load i64, ptr %3, align 8, !tbaa !5
  %38 = add nsw i64 %37, 1
  store i64 %38, ptr %3, align 8, !tbaa !5
  br label %17, !llvm.loop !9

39:                                               ; preds = %28, %17
  br label %40

40:                                               ; preds = %39, %14
  br label %45

41:                                               ; preds = %7
  %42 = load i64, ptr %2, align 8, !tbaa !5
  %43 = sdiv i64 %42, 2
  %44 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %43)
  br label %45

45:                                               ; preds = %41, %40
  br label %4, !llvm.loop !11

46:                                               ; preds = %4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #4
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #3

declare i32 @printf(ptr noundef, ...) #3

attributes #0 = { mustprogress 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { "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 }

!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 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 [5 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 nounwind uwtable
declare dso_local noundef zeroext i1 @_Z7isPrimex(i64 noundef) local_unnamed_addr #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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %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)
  %.not12 = icmp eq i32 %2, -1
  br i1 %.not12, label %._crit_edge, label %.lr.ph13

.lr.ph13:                                         ; preds = %0, %.loopexit
  %3 = load i64, ptr %1, align 8, !tbaa !5
  %4 = and i64 %3, 1
  %.not6 = icmp eq i64 %4, 0
  br i1 %.not6, label %20, label %5

5:                                                ; preds = %.lr.ph13
  %6 = call noundef zeroext i1 @_Z7isPrimex(i64 noundef %3)
  br i1 %6, label %8, label %.preheader

.preheader:                                       ; preds = %5
  %7 = load i64, ptr %1, align 8, !tbaa !5
  %.not710 = icmp slt i64 %7, 9
  br i1 %.not710, label %.loopexit, label %.lr.ph

8:                                                ; preds = %5
  %9 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1)
  br label %.loopexit

.lr.ph:                                           ; preds = %.preheader, %17
  %.011 = phi i64 [ %18, %17 ], [ 3, %.preheader ]
  %10 = urem i64 %7, %.011
  %11 = icmp eq i64 %10, 0
  br i1 %11, label %12, label %17

12:                                               ; preds = %.lr.ph
  %13 = sub nsw i64 %7, %.011
  %14 = sdiv i64 %13, 2
  %15 = add nsw i64 %14, 1
  %16 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %15)
  br label %.loopexit

17:                                               ; preds = %.lr.ph
  %18 = add nuw nsw i64 %.011, 1
  %19 = mul nuw nsw i64 %18, %18
  %.not7 = icmp sgt i64 %19, %7
  br i1 %.not7, label %.loopexit, label %.lr.ph, !llvm.loop !9

20:                                               ; preds = %.lr.ph13
  %21 = ashr exact i64 %3, 1
  %22 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %21)
  br label %.loopexit

.loopexit:                                        ; preds = %17, %.preheader, %8, %12, %20
  %23 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %.not = icmp eq i32 %23, -1
  br i1 %.not, label %._crit_edge, label %.lr.ph13, !llvm.loop !11

._crit_edge:                                      ; preds = %.loopexit, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #4
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

attributes #0 = { mustprogress 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 = { mustprogress 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 #3 = { 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 #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 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,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass