; LLVM IR from DionysiosB/CodeForces :: 1984B-LargeAddition (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 [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 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 i8, align 1
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %6

6:                                                ; preds = %41, %0
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = add nsw i64 %7, -1
  store i64 %8, ptr %2, align 8, !tbaa !5
  %9 = icmp ne i64 %7, 0
  br i1 %9, label %10, label %49

10:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 1, ptr %4) #3
  store i8 1, ptr %4, align 1, !tbaa !9
  %12 = load i64, ptr %3, align 8, !tbaa !5
  %13 = srem i64 %12, 10
  %14 = icmp eq i64 %13, 9
  br i1 %14, label %15, label %16

15:                                               ; preds = %10
  store i8 0, ptr %4, align 1, !tbaa !9
  br label %16

16:                                               ; preds = %15, %10
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = sdiv i64 %17, 10
  store i64 %18, ptr %3, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %32, %16
  %20 = load i8, ptr %4, align 1, !tbaa !9, !range !11, !noundef !12
  %21 = trunc i8 %20 to i1
  br i1 %21, label %22, label %25

22:                                               ; preds = %19
  %23 = load i64, ptr %3, align 8, !tbaa !5
  %24 = icmp sgt i64 %23, 9
  br label %25

25:                                               ; preds = %22, %19
  %26 = phi i1 [ false, %19 ], [ %24, %22 ]
  br i1 %26, label %27, label %35

27:                                               ; preds = %25
  %28 = load i64, ptr %3, align 8, !tbaa !5
  %29 = srem i64 %28, 10
  %30 = icmp eq i64 %29, 0
  br i1 %30, label %31, label %32

31:                                               ; preds = %27
  store i8 0, ptr %4, align 1, !tbaa !9
  br label %35

32:                                               ; preds = %27
  %33 = load i64, ptr %3, align 8, !tbaa !5
  %34 = sdiv i64 %33, 10
  store i64 %34, ptr %3, align 8, !tbaa !5
  br label %19, !llvm.loop !13

35:                                               ; preds = %31, %25
  %36 = load i8, ptr %4, align 1, !tbaa !9, !range !11, !noundef !12
  %37 = trunc i8 %36 to i1
  br i1 %37, label %38, label %41

38:                                               ; preds = %35
  %39 = load i64, ptr %3, align 8, !tbaa !5
  %40 = icmp eq i64 %39, 1
  br label %41

41:                                               ; preds = %38, %35
  %42 = phi i1 [ false, %35 ], [ %40, %38 ]
  %43 = zext i1 %42 to i8
  store i8 %43, ptr %4, align 1, !tbaa !9
  %44 = load i8, ptr %4, align 1, !tbaa !9, !range !11, !noundef !12
  %45 = trunc i8 %44 to i1
  %46 = zext i1 %45 to i64
  %47 = select i1 %45, ptr @.str.1, ptr @.str.2
  %48 = call i32 @puts(ptr noundef %47)
  call void @llvm.lifetime.end.p0(i64 1, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %6, !llvm.loop !15

49:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %50 = load i32, ptr %1, align 4
  ret i32 %50
}

; 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

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 long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!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 [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 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
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i64, ptr %1, align 8, !tbaa !5
  %5 = add nsw i64 %4, -1
  store i64 %5, ptr %1, align 8, !tbaa !5
  %.not18 = icmp eq i64 %4, 0
  br i1 %.not18, label %._crit_edge21, label %.lr.ph20

.lr.ph20:                                         ; preds = %0, %._crit_edge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %.fr = freeze i64 %7
  %8 = srem i64 %.fr, 10
  %9 = icmp ne i64 %8, 9
  %10 = sdiv i64 %.fr, 10
  %11 = icmp sgt i64 %.fr, 99
  %12 = and i1 %9, %11
  br i1 %12, label %.lr.ph.split, label %._crit_edge

.lr.ph.split:                                     ; preds = %.lr.ph20, %15
  %storemerge6 = phi i64 [ %14, %15 ], [ %10, %.lr.ph20 ]
  %13 = urem i64 %storemerge6, 10
  %14 = udiv i64 %storemerge6, 10
  %.not23 = icmp ne i64 %13, 0
  br i1 %.not23, label %15, label %._crit_edge

15:                                               ; preds = %.lr.ph.split
  %16 = icmp ugt i64 %storemerge6, 99
  br i1 %16, label %.lr.ph.split, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %15, %.lr.ph.split, %.lr.ph20
  %storemerge.lcssa5 = phi i64 [ %10, %.lr.ph20 ], [ %storemerge6, %.lr.ph.split ], [ %14, %15 ]
  %.0 = phi i1 [ %9, %.lr.ph20 ], [ %.not23, %.lr.ph.split ], [ %.not23, %15 ]
  store i64 %storemerge.lcssa5, ptr %2, align 8, !tbaa !5
  %17 = icmp eq i64 %storemerge.lcssa5, 1
  %18 = and i1 %.0, %17
  %19 = select i1 %18, ptr @.str.1, ptr @.str.2
  %20 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %19)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %21 = load i64, ptr %1, align 8, !tbaa !5
  %22 = add nsw i64 %21, -1
  store i64 %22, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %21, 0
  br i1 %.not, label %._crit_edge21, label %.lr.ph20, !llvm.loop !11

._crit_edge21:                                    ; preds = %._crit_edge, %0
  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

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 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: CorrelatedValuePropagationPass,DivRemPairsPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass