; LLVM IR from DionysiosB/CodeForces :: 0200-0299 (267A-Subtractions)

; 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 [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 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 i32, align 4
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %7

7:                                                ; preds = %52, %0
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = add nsw i32 %8, -1
  store i32 %9, ptr %2, align 4, !tbaa !5
  %10 = icmp ne i32 %8, 0
  br i1 %10, label %11, label %55

11:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  store i64 0, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !9
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4)
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 0, ptr %5, align 8, !tbaa !9
  br label %13

13:                                               ; preds = %51, %11
  %14 = load i64, ptr %3, align 8, !tbaa !9
  %15 = icmp sgt i64 %14, 0
  br i1 %15, label %16, label %19

16:                                               ; preds = %13
  %17 = load i64, ptr %4, align 8, !tbaa !9
  %18 = icmp sgt i64 %17, 0
  br label %19

19:                                               ; preds = %16, %13
  %20 = phi i1 [ false, %13 ], [ %18, %16 ]
  br i1 %20, label %21, label %52

21:                                               ; preds = %19
  %22 = load i64, ptr %3, align 8, !tbaa !9
  %23 = load i64, ptr %4, align 8, !tbaa !9
  %24 = icmp sgt i64 %22, %23
  br i1 %24, label %25, label %38

25:                                               ; preds = %21
  %26 = load i64, ptr %3, align 8, !tbaa !9
  %27 = load i64, ptr %4, align 8, !tbaa !9
  %28 = sdiv i64 %26, %27
  %29 = load i64, ptr %5, align 8, !tbaa !9
  %30 = add nsw i64 %29, %28
  store i64 %30, ptr %5, align 8, !tbaa !9
  %31 = load i64, ptr %3, align 8, !tbaa !9
  %32 = load i64, ptr %4, align 8, !tbaa !9
  %33 = sdiv i64 %31, %32
  %34 = load i64, ptr %4, align 8, !tbaa !9
  %35 = mul nsw i64 %33, %34
  %36 = load i64, ptr %3, align 8, !tbaa !9
  %37 = sub nsw i64 %36, %35
  store i64 %37, ptr %3, align 8, !tbaa !9
  br label %51

38:                                               ; preds = %21
  %39 = load i64, ptr %4, align 8, !tbaa !9
  %40 = load i64, ptr %3, align 8, !tbaa !9
  %41 = sdiv i64 %39, %40
  %42 = load i64, ptr %5, align 8, !tbaa !9
  %43 = add nsw i64 %42, %41
  store i64 %43, ptr %5, align 8, !tbaa !9
  %44 = load i64, ptr %4, align 8, !tbaa !9
  %45 = load i64, ptr %3, align 8, !tbaa !9
  %46 = sdiv i64 %44, %45
  %47 = load i64, ptr %3, align 8, !tbaa !9
  %48 = mul nsw i64 %46, %47
  %49 = load i64, ptr %4, align 8, !tbaa !9
  %50 = sub nsw i64 %49, %48
  store i64 %50, ptr %4, align 8, !tbaa !9
  br label %51

51:                                               ; preds = %38, %25
  br label %13, !llvm.loop !11

52:                                               ; preds = %19
  %53 = load i64, ptr %5, align 8, !tbaa !9
  %54 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %53)
  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 %7, !llvm.loop !13

55:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  ret i32 0
}

; 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !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 [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 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 i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = add nsw i32 %5, -1
  store i32 %6, ptr %1, align 4, !tbaa !5
  %.not7 = icmp eq i32 %5, 0
  br i1 %.not7, label %._crit_edge10, label %.lr.ph9

.lr.ph9:                                          ; preds = %0, %._crit_edge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  store i64 0, ptr %2, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  store i64 0, ptr %3, align 8, !tbaa !9
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %.promoted = load i64, ptr %2, align 8, !tbaa !9
  %.promoted5 = load i64, ptr %3, align 8
  %8 = icmp sgt i64 %.promoted, 0
  %9 = icmp sgt i64 %.promoted5, 0
  %10 = select i1 %8, i1 %9, i1 false
  br i1 %10, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph9, %20
  %.06 = phi i64 [ %.1, %20 ], [ 0, %.lr.ph9 ]
  %11 = phi i64 [ %22, %20 ], [ %.promoted, %.lr.ph9 ]
  %12 = phi i64 [ %21, %20 ], [ %.promoted5, %.lr.ph9 ]
  %13 = icmp ugt i64 %11, %12
  br i1 %13, label %14, label %17

14:                                               ; preds = %.lr.ph
  %15 = udiv i64 %11, %12
  %16 = mul nuw nsw i64 %15, %12
  %.recomposed = urem i64 %11, %12
  store i64 %.recomposed, ptr %2, align 8, !tbaa !9
  br label %20

17:                                               ; preds = %.lr.ph
  %18 = udiv i64 %12, %11
  %19 = mul nuw nsw i64 %18, %11
  %.recomposed11 = urem i64 %12, %11
  store i64 %.recomposed11, ptr %3, align 8, !tbaa !9
  br label %20

20:                                               ; preds = %17, %14
  %21 = phi i64 [ %12, %14 ], [ %.recomposed11, %17 ]
  %22 = phi i64 [ %.recomposed, %14 ], [ %11, %17 ]
  %.pn = phi i64 [ %15, %14 ], [ %18, %17 ]
  %.1 = add nsw i64 %.pn, %.06
  %23 = icmp sgt i64 %22, 0
  %24 = icmp sgt i64 %21, 0
  %25 = select i1 %23, i1 %24, i1 false
  br i1 %25, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %20, %.lr.ph9
  %.0.lcssa = phi i64 [ 0, %.lr.ph9 ], [ %.1, %20 ]
  %26 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.0.lcssa)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %27 = load i32, ptr %1, align 4, !tbaa !5
  %28 = add nsw i32 %27, -1
  store i32 %28, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %27, 0
  br i1 %.not, label %._crit_edge10, label %.lr.ph9, !llvm.loop !13

._crit_edge10:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 4, 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 @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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


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