; LLVM IR from manishbisht/Competitive-Programming :: Codeforces/Codeforces Round #364 (Div. 2) (They Are Everywhere)

; 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"

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z24lengthOfLongestSubstringNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca [256 x i8], align 16
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  %10 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #5
  %11 = trunc i64 %10 to i32
  store i32 %11, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  store i32 0, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  store i32 0, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 0, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 256, ptr %7) #5
  call void @llvm.memset.p0.i64(ptr align 16 %7, i8 0, i64 256, i1 false)
  br label %12

12:                                               ; preds = %66, %1
  %13 = load i32, ptr %5, align 4, !tbaa !9
  %14 = load i32, ptr %3, align 4, !tbaa !9
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %16, label %67

16:                                               ; preds = %12
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %18)
  %20 = load i8, ptr %19, align 1, !tbaa !11
  %21 = sext i8 %20 to i64
  %22 = getelementptr inbounds [256 x i8], ptr %7, i64 0, i64 %21
  %23 = load i8, ptr %22, align 1, !tbaa !12, !range !14, !noundef !15
  %24 = trunc i8 %23 to i1
  br i1 %24, label %25, label %57

25:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #5
  %26 = load i32, ptr %5, align 4, !tbaa !9
  %27 = load i32, ptr %4, align 4, !tbaa !9
  %28 = sub nsw i32 %26, %27
  store i32 %28, ptr %8, align 4, !tbaa !9
  %29 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(4) %8)
  %30 = load i32, ptr %29, align 4, !tbaa !9
  store i32 %30, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #5
  br label %31

31:                                               ; preds = %43, %25
  %32 = load i32, ptr %4, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %33)
  %35 = load i8, ptr %34, align 1, !tbaa !11
  %36 = sext i8 %35 to i32
  %37 = load i32, ptr %5, align 4, !tbaa !9
  %38 = sext i32 %37 to i64
  %39 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %38)
  %40 = load i8, ptr %39, align 1, !tbaa !11
  %41 = sext i8 %40 to i32
  %42 = icmp ne i32 %36, %41
  br i1 %42, label %43, label %52

43:                                               ; preds = %31
  %44 = load i32, ptr %4, align 4, !tbaa !9
  %45 = sext i32 %44 to i64
  %46 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %45)
  %47 = load i8, ptr %46, align 1, !tbaa !11
  %48 = sext i8 %47 to i64
  %49 = getelementptr inbounds [256 x i8], ptr %7, i64 0, i64 %48
  store i8 0, ptr %49, align 1, !tbaa !12
  %50 = load i32, ptr %4, align 4, !tbaa !9
  %51 = add nsw i32 %50, 1
  store i32 %51, ptr %4, align 4, !tbaa !9
  br label %31, !llvm.loop !16

52:                                               ; preds = %31
  %53 = load i32, ptr %4, align 4, !tbaa !9
  %54 = add nsw i32 %53, 1
  store i32 %54, ptr %4, align 4, !tbaa !9
  %55 = load i32, ptr %5, align 4, !tbaa !9
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %5, align 4, !tbaa !9
  br label %66

57:                                               ; preds = %16
  %58 = load i32, ptr %5, align 4, !tbaa !9
  %59 = sext i32 %58 to i64
  %60 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %59)
  %61 = load i8, ptr %60, align 1, !tbaa !11
  %62 = sext i8 %61 to i64
  %63 = getelementptr inbounds [256 x i8], ptr %7, i64 0, i64 %62
  store i8 1, ptr %63, align 1, !tbaa !12
  %64 = load i32, ptr %5, align 4, !tbaa !9
  %65 = add nsw i32 %64, 1
  store i32 %65, ptr %5, align 4, !tbaa !9
  br label %66

66:                                               ; preds = %57, %52
  br label %12, !llvm.loop !18

67:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #5
  %68 = load i32, ptr %3, align 4, !tbaa !9
  %69 = load i32, ptr %4, align 4, !tbaa !9
  %70 = sub nsw i32 %68, %69
  store i32 %70, ptr %9, align 4, !tbaa !9
  %71 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(4) %9)
  %72 = load i32, ptr %71, align 4, !tbaa !9
  store i32 %72, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #5
  %73 = load i32, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 256, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  ret i32 %73
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { mustprogress 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 = { mustprogress 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 #3 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { inlinehint mustprogress 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 #5 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"bool", !7, i64 0}
!14 = !{i8 0, i8 2}
!15 = !{}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}
!18 = distinct !{!18, !17}


; 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z24lengthOfLongestSubstringNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull %0) local_unnamed_addr #0 {
  %2 = alloca i32, align 4
  %3 = alloca [256 x i8], align 16
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #4
  %7 = trunc i64 %6 to i32
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4
  store i32 0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 256, ptr nonnull %3) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(256) %3, i8 0, i64 256, i1 false)
  %8 = icmp sgt i32 %7, 0
  br i1 %8, label %.lr.ph23.preheader, label %._crit_edge24

.lr.ph23.preheader:                               ; preds = %1
  %wide.trip.count = and i64 %6, 2147483647
  br label %.lr.ph23

.lr.ph23:                                         ; preds = %.lr.ph23.preheader, %40
  %indvars.iv27 = phi i64 [ 0, %.lr.ph23.preheader ], [ %indvars.iv.next28, %40 ]
  %.01520 = phi i32 [ 0, %.lr.ph23.preheader ], [ %.2, %40 ]
  %9 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %indvars.iv27)
  %10 = load i8, ptr %9, align 1, !tbaa !9
  %11 = sext i8 %10 to i64
  %12 = getelementptr inbounds [256 x i8], ptr %3, i64 0, i64 %11
  %13 = load i8, ptr %12, align 1, !tbaa !10, !range !12, !noundef !13
  %14 = trunc nuw i8 %13 to i1
  br i1 %14, label %15, label %35

15:                                               ; preds = %.lr.ph23
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #4
  %16 = trunc nuw nsw i64 %indvars.iv27 to i32
  %17 = sub nsw i32 %16, %.01520
  store i32 %17, ptr %4, align 4, !tbaa !5
  %18 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %2, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %19 = load i32, ptr %18, align 4, !tbaa !5
  store i32 %19, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #4
  %20 = sext i32 %.01520 to i64
  %21 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %20)
  %22 = load i8, ptr %21, align 1, !tbaa !9
  %23 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %indvars.iv27)
  %24 = load i8, ptr %23, align 1, !tbaa !9
  %.not18 = icmp eq i8 %22, %24
  br i1 %.not18, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %15, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ %20, %15 ]
  %25 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %indvars.iv)
  %26 = load i8, ptr %25, align 1, !tbaa !9
  %27 = sext i8 %26 to i64
  %28 = getelementptr inbounds [256 x i8], ptr %3, i64 0, i64 %27
  store i8 0, ptr %28, align 1, !tbaa !10
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %29 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %indvars.iv.next)
  %30 = load i8, ptr %29, align 1, !tbaa !9
  %31 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %indvars.iv27)
  %32 = load i8, ptr %31, align 1, !tbaa !9
  %.not = icmp eq i8 %30, %32
  br i1 %.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !14

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %33 = trunc nsw i64 %indvars.iv.next to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %15
  %.116.lcssa = phi i32 [ %.01520, %15 ], [ %33, %._crit_edge.loopexit ]
  %34 = add nsw i32 %.116.lcssa, 1
  br label %40

35:                                               ; preds = %.lr.ph23
  %36 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %indvars.iv27)
  %37 = load i8, ptr %36, align 1, !tbaa !9
  %38 = sext i8 %37 to i64
  %39 = getelementptr inbounds [256 x i8], ptr %3, i64 0, i64 %38
  store i8 1, ptr %39, align 1, !tbaa !10
  br label %40

40:                                               ; preds = %35, %._crit_edge
  %.2 = phi i32 [ %34, %._crit_edge ], [ %.01520, %35 ]
  %indvars.iv.next28 = add nuw nsw i64 %indvars.iv27, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next28, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge24, label %.lr.ph23, !llvm.loop !16

._crit_edge24:                                    ; preds = %40, %1
  %.015.lcssa = phi i32 [ 0, %1 ], [ %.2, %40 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #4
  %41 = sub nsw i32 %7, %.015.lcssa
  store i32 %41, ptr %5, align 4, !tbaa !5
  %42 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %2, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %43 = load i32, ptr %42, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #4
  call void @llvm.lifetime.end.p0(i64 256, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4
  ret i32 %43
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #3

; 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 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { inlinehint mustprogress 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"bool", !7, i64 0}
!12 = !{i8 0, i8 2}
!13 = !{}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}
!16 = distinct !{!16, !15}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass