; LLVM IR from DionysiosB/CodeForces :: 1000-1099 (1015D-WalkingBetweenHouses)

; 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 [15 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [1 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 i32, align 4
  %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
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2, ptr noundef %3, ptr noundef %4)
  %9 = load i64, ptr %4, align 8, !tbaa !5
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = icmp slt i64 %9, %10
  br i1 %11, label %19, label %12

12:                                               ; preds = %0
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %14 = sub nsw i64 %13, 1
  %15 = load i64, ptr %3, align 8, !tbaa !5
  %16 = mul nsw i64 %14, %15
  %17 = load i64, ptr %4, align 8, !tbaa !5
  %18 = icmp slt i64 %16, %17
  br i1 %18, label %19, label %21

19:                                               ; preds = %12, %0
  %20 = call i32 @puts(ptr noundef @.str.1)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  br label %64

21:                                               ; preds = %12
  %22 = call i32 @puts(ptr noundef @.str.2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 1, ptr %6, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %59, %21
  %24 = load i64, ptr %3, align 8, !tbaa !5
  %25 = add nsw i64 %24, -1
  store i64 %25, ptr %3, align 8, !tbaa !5
  %26 = icmp ne i64 %24, 0
  br i1 %26, label %27, label %62

27:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = load i64, ptr %3, align 8, !tbaa !5
  %30 = sub nsw i64 %28, %29
  %31 = load i64, ptr %2, align 8, !tbaa !5
  %32 = sub nsw i64 %31, 1
  %33 = icmp slt i64 %30, %32
  br i1 %33, label %34, label %38

34:                                               ; preds = %27
  %35 = load i64, ptr %4, align 8, !tbaa !5
  %36 = load i64, ptr %3, align 8, !tbaa !5
  %37 = sub nsw i64 %35, %36
  br label %41

38:                                               ; preds = %27
  %39 = load i64, ptr %2, align 8, !tbaa !5
  %40 = sub nsw i64 %39, 1
  br label %41

41:                                               ; preds = %38, %34
  %42 = phi i64 [ %37, %34 ], [ %40, %38 ]
  store i64 %42, ptr %7, align 8, !tbaa !5
  %43 = load i64, ptr %7, align 8, !tbaa !5
  %44 = load i64, ptr %4, align 8, !tbaa !5
  %45 = sub nsw i64 %44, %43
  store i64 %45, ptr %4, align 8, !tbaa !5
  %46 = load i64, ptr %6, align 8, !tbaa !5
  %47 = load i64, ptr %7, align 8, !tbaa !5
  %48 = add nsw i64 %46, %47
  %49 = load i64, ptr %2, align 8, !tbaa !5
  %50 = icmp sle i64 %48, %49
  br i1 %50, label %51, label %55

51:                                               ; preds = %41
  %52 = load i64, ptr %7, align 8, !tbaa !5
  %53 = load i64, ptr %6, align 8, !tbaa !5
  %54 = add nsw i64 %53, %52
  store i64 %54, ptr %6, align 8, !tbaa !5
  br label %59

55:                                               ; preds = %41
  %56 = load i64, ptr %7, align 8, !tbaa !5
  %57 = load i64, ptr %6, align 8, !tbaa !5
  %58 = sub nsw i64 %57, %56
  store i64 %58, ptr %6, align 8, !tbaa !5
  br label %59

59:                                               ; preds = %55, %51
  %60 = load i64, ptr %6, align 8, !tbaa !5
  %61 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i64 noundef %60)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %23, !llvm.loop !9

62:                                               ; preds = %23
  %63 = call i32 @puts(ptr noundef @.str.4)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %64

64:                                               ; preds = %62, %19
  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
  %65 = load i32, ptr %1, align 4
  ret i32 %65
}

; 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

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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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 [15 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [1 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) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %5 = load i64, ptr %3, align 8, !tbaa !5
  %6 = load i64, ptr %2, align 8, !tbaa !5
  %7 = icmp slt i64 %5, %6
  br i1 %7, label %._crit_edge, label %8

8:                                                ; preds = %0
  %9 = load i64, ptr %1, align 8, !tbaa !5
  %10 = add nsw i64 %9, -1
  %11 = mul nsw i64 %10, %6
  %12 = icmp slt i64 %11, %5
  br i1 %12, label %._crit_edge, label %13

13:                                               ; preds = %8
  %14 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.2)
  %15 = load i64, ptr %2, align 8, !tbaa !5
  %16 = add nsw i64 %15, -1
  store i64 %16, ptr %2, align 8, !tbaa !5
  %.not15 = icmp eq i64 %15, 0
  br i1 %.not15, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %13, %.lr.ph
  %17 = phi i64 [ %27, %.lr.ph ], [ %16, %13 ]
  %.0916 = phi i64 [ %.1, %.lr.ph ], [ 1, %13 ]
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = sub nsw i64 %18, %17
  %20 = load i64, ptr %1, align 8, !tbaa !5
  %21 = add nsw i64 %20, -1
  %. = call i64 @llvm.smin.i64(i64 %19, i64 %21)
  %22 = sub nsw i64 %18, %.
  store i64 %22, ptr %3, align 8, !tbaa !5
  %23 = add nsw i64 %., %.0916
  %.not14 = icmp sgt i64 %23, %20
  %24 = sub nsw i64 %.0916, %.
  %.1 = select i1 %.not14, i64 %24, i64 %23
  %25 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i64 noundef %.1)
  %26 = load i64, ptr %2, align 8, !tbaa !5
  %27 = add nsw i64 %26, -1
  store i64 %27, ptr %2, align 8, !tbaa !5
  %.not = icmp eq i64 %26, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %13, %0, %8
  %.str.4.sink = phi ptr [ @.str.1, %8 ], [ @.str.1, %0 ], [ @.str.4, %13 ], [ @.str.4, %.lr.ph ]
  %28 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %.str.4.sink)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  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: nofree nounwind
declare noundef i32 @puts(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

; 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 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: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass