; LLVM IR from DionysiosB/CodeForces :: 1931A-RecoveringASmallString (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 [8 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 i8, align 1
  %6 = alloca i64, align 8
  %7 = alloca i8, align 1
  %8 = alloca i64, align 8
  %9 = alloca i8, align 1
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %11

11:                                               ; preds = %38, %0
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = add nsw i64 %12, -1
  store i64 %13, ptr %2, align 8, !tbaa !5
  %14 = icmp ne i64 %12, 0
  br i1 %14, label %15, label %59

15:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = icmp sgt i64 %17, 52
  br i1 %18, label %19, label %22

19:                                               ; preds = %15
  %20 = load i64, ptr %3, align 8, !tbaa !5
  %21 = sub nsw i64 %20, 52
  br label %23

22:                                               ; preds = %15
  br label %23

23:                                               ; preds = %22, %19
  %24 = phi i64 [ %21, %19 ], [ 1, %22 ]
  store i64 %24, ptr %4, align 8, !tbaa !5
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = load i64, ptr %3, align 8, !tbaa !5
  %27 = sub nsw i64 %26, %25
  store i64 %27, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #3
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = add nsw i64 97, %28
  %30 = sub nsw i64 %29, 1
  %31 = trunc i64 %30 to i8
  store i8 %31, ptr %5, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %32 = load i64, ptr %3, align 8, !tbaa !5
  %33 = icmp sgt i64 %32, 26
  br i1 %33, label %34, label %37

34:                                               ; preds = %23
  %35 = load i64, ptr %3, align 8, !tbaa !5
  %36 = sub nsw i64 %35, 26
  br label %38

37:                                               ; preds = %23
  br label %38

38:                                               ; preds = %37, %34
  %39 = phi i64 [ %36, %34 ], [ 1, %37 ]
  store i64 %39, ptr %6, align 8, !tbaa !5
  %40 = load i64, ptr %6, align 8, !tbaa !5
  %41 = load i64, ptr %3, align 8, !tbaa !5
  %42 = sub nsw i64 %41, %40
  store i64 %42, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #3
  %43 = load i64, ptr %6, align 8, !tbaa !5
  %44 = add nsw i64 97, %43
  %45 = sub nsw i64 %44, 1
  %46 = trunc i64 %45 to i8
  store i8 %46, ptr %7, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %47 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %47, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %9) #3
  %48 = load i64, ptr %8, align 8, !tbaa !5
  %49 = add nsw i64 97, %48
  %50 = sub nsw i64 %49, 1
  %51 = trunc i64 %50 to i8
  store i8 %51, ptr %9, align 1, !tbaa !9
  %52 = load i8, ptr %5, align 1, !tbaa !9
  %53 = sext i8 %52 to i32
  %54 = load i8, ptr %7, align 1, !tbaa !9
  %55 = sext i8 %54 to i32
  %56 = load i8, ptr %9, align 1, !tbaa !9
  %57 = sext i8 %56 to i32
  %58 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %53, i32 noundef %55, i32 noundef %57)
  call void @llvm.lifetime.end.p0(i64 1, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 1, 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 %11, !llvm.loop !10

59:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %60 = load i32, ptr %1, align 4
  ret i32 %60
}

; 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"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 [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 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
  %.not11 = icmp eq i64 %4, 0
  br i1 %.not11, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %.lr.ph
  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
  %8 = icmp sgt i64 %7, 52
  %9 = add nsw i64 %7, -52
  %10 = select i1 %8, i64 %9, i64 1
  %11 = sub nsw i64 %7, %10
  %12 = trunc i64 %10 to i32
  %13 = icmp sgt i64 %11, 26
  %14 = add nsw i64 %11, -26
  %15 = select i1 %13, i64 %14, i64 1
  %16 = sub nsw i64 %11, %15
  store i64 %16, ptr %2, align 8, !tbaa !5
  %17 = trunc i64 %15 to i32
  %18 = trunc i64 %16 to i32
  %19 = shl i32 %12, 24
  %sext = add i32 %19, 1610612736
  %20 = ashr exact i32 %sext, 24
  %21 = shl i32 %17, 24
  %sext9 = add i32 %21, 1610612736
  %22 = ashr exact i32 %sext9, 24
  %23 = shl i32 %18, 24
  %sext10 = add i32 %23, 1610612736
  %24 = ashr exact i32 %sext10, 24
  %25 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %20, i32 noundef %22, i32 noundef %24)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %26 = load i64, ptr %1, align 8, !tbaa !5
  %27 = add nsw i64 %26, -1
  store i64 %27, ptr %1, 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, %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 @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 = !{!"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