; LLVM IR from DionysiosB/CodeForces :: 1982B-CollatzConjecture (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 [12 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 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 = %58, %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 %66

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4, ptr noundef %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 = %54, %13
  %16 = load i64, ptr %5, align 8, !tbaa !5
  %17 = icmp ne i64 %16, 0
  br i1 %17, label %18, label %21

18:                                               ; preds = %15
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = icmp ne i64 %19, 1
  br label %21

21:                                               ; preds = %18, %15
  %22 = phi i1 [ false, %15 ], [ %20, %18 ]
  br i1 %22, label %23, label %58

23:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %24 = load i64, ptr %3, align 8, !tbaa !5
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = sdiv i64 %24, %25
  %27 = add nsw i64 %26, 1
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = mul nsw i64 %27, %28
  %30 = load i64, ptr %3, align 8, !tbaa !5
  %31 = sub nsw i64 %29, %30
  store i64 %31, ptr %7, align 8, !tbaa !9
  %32 = load i64, ptr %7, align 8, !tbaa !9
  %33 = icmp ne i64 %32, 0
  br i1 %33, label %35, label %34

34:                                               ; preds = %23
  store i64 1, ptr %7, align 8, !tbaa !9
  br label %35

35:                                               ; preds = %34, %23
  %36 = load i64, ptr %7, align 8, !tbaa !9
  %37 = load i64, ptr %5, 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
  store i64 %40, ptr %7, align 8, !tbaa !9
  br label %41

41:                                               ; preds = %39, %35
  %42 = load i64, ptr %7, align 8, !tbaa !9
  %43 = load i64, ptr %3, align 8, !tbaa !5
  %44 = add nsw i64 %43, %42
  store i64 %44, ptr %3, align 8, !tbaa !5
  br label %45

45:                                               ; preds = %50, %41
  %46 = load i64, ptr %3, align 8, !tbaa !5
  %47 = load i64, ptr %4, align 8, !tbaa !5
  %48 = srem i64 %46, %47
  %49 = icmp eq i64 %48, 0
  br i1 %49, label %50, label %54

50:                                               ; preds = %45
  %51 = load i64, ptr %4, align 8, !tbaa !5
  %52 = load i64, ptr %3, align 8, !tbaa !5
  %53 = sdiv i64 %52, %51
  store i64 %53, ptr %3, align 8, !tbaa !5
  br label %45, !llvm.loop !11

54:                                               ; preds = %45
  %55 = load i64, ptr %7, align 8, !tbaa !9
  %56 = load i64, ptr %5, align 8, !tbaa !5
  %57 = sub nsw i64 %56, %55
  store i64 %57, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %15, !llvm.loop !13

58:                                               ; preds = %21
  %59 = load i64, ptr %3, align 8, !tbaa !5
  %60 = load i64, ptr %5, align 8, !tbaa !5
  %61 = load i64, ptr %4, align 8, !tbaa !5
  %62 = sub nsw i64 %61, 1
  %63 = srem i64 %60, %62
  %64 = add nsw i64 %59, %63
  %65 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %64)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  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 !14

66:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %67 = load i32, ptr %1, align 4
  ret i32 %67
}

; 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 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !12}


; 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 [12 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
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %6 = load i64, ptr %1, align 8, !tbaa !5
  %7 = add nsw i64 %6, -1
  store i64 %7, ptr %1, align 8, !tbaa !5
  %.not19 = icmp eq i64 %6, 0
  br i1 %.not19, label %._crit_edge22, label %.lr.ph21

.lr.ph21:                                         ; preds = %0, %27
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3, ptr noundef nonnull %4)
  %.promoted = load i64, ptr %4, align 8, !tbaa !5
  %.promoted10 = load i64, ptr %2, align 8
  %9 = icmp ne i64 %.promoted, 0
  %10 = icmp ne i64 %.promoted10, 1
  %11 = select i1 %9, i1 %10, i1 false
  %.pre = load i64, ptr %3, align 8, !tbaa !5
  br i1 %11, label %.lr.ph14, label %27

.lr.ph14:                                         ; preds = %.lr.ph21, %._crit_edge
  %12 = phi i64 [ %23, %._crit_edge ], [ %.promoted, %.lr.ph21 ]
  %storemerge.lcssa1112 = phi i64 [ %storemerge.lcssa, %._crit_edge ], [ %.promoted10, %.lr.ph21 ]
  %13 = sdiv i64 %storemerge.lcssa1112, %.pre
  %14 = add nsw i64 %13, 1
  %15 = mul nsw i64 %14, %.pre
  %16 = sub nsw i64 %15, %storemerge.lcssa1112
  %.not7 = icmp eq i64 %15, %storemerge.lcssa1112
  %spec.store.select = select i1 %.not7, i64 1, i64 %16
  %spec.select = call i64 @llvm.smin.i64(i64 %spec.store.select, i64 %12)
  %17 = add nsw i64 %spec.select, %storemerge.lcssa1112
  %18 = srem i64 %17, %.pre
  %19 = icmp eq i64 %18, 0
  br i1 %19, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph14, %.lr.ph
  %storemerge9 = phi i64 [ %20, %.lr.ph ], [ %17, %.lr.ph14 ]
  %20 = sdiv i64 %storemerge9, %.pre
  %21 = srem i64 %20, %.pre
  %22 = icmp eq i64 %21, 0
  br i1 %22, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph14
  %storemerge.lcssa = phi i64 [ %17, %.lr.ph14 ], [ %20, %.lr.ph ]
  %23 = sub nsw i64 %12, %spec.select
  %24 = icmp ne i64 %23, 0
  %25 = icmp ne i64 %storemerge.lcssa, 1
  %26 = and i1 %24, %25
  br i1 %26, label %.lr.ph14, label %._crit_edge15, !llvm.loop !11

._crit_edge15:                                    ; preds = %._crit_edge
  store i64 %storemerge.lcssa, ptr %2, align 8, !tbaa !5
  store i64 %23, ptr %4, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %._crit_edge15, %.lr.ph21
  %.lcssa8 = phi i64 [ %23, %._crit_edge15 ], [ %.promoted, %.lr.ph21 ]
  %.lcssa = phi i64 [ %storemerge.lcssa, %._crit_edge15 ], [ %.promoted10, %.lr.ph21 ]
  %28 = add nsw i64 %.pre, -1
  %29 = srem i64 %.lcssa8, %28
  %30 = add nsw i64 %29, %.lcssa
  %31 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %30)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %32 = load i64, ptr %1, align 8, !tbaa !5
  %33 = add nsw i64 %32, -1
  store i64 %33, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %32, 0
  br i1 %.not, label %._crit_edge22, label %.lr.ph21, !llvm.loop !12

._crit_edge22:                                    ; preds = %27, %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.smin.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}
!12 = distinct !{!12, !10}


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