; LLVM IR from AdarshGaur/Competitive-Programming :: Codeforces/Codeforces Round #822 (Div. 2)/A.ll (Z5solvev)

; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5solvev() #0 {
  %1 = alloca i64, align 8
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #5
  %8 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERl(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %1)
  %9 = load i64, ptr %1, align 8, !tbaa !5
  %10 = call ptr @llvm.stacksave.p0()
  store ptr %10, ptr %2, align 8
  %11 = alloca i64, i64 %9, align 16
  store i64 %9, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  store i64 0, ptr %4, align 8, !tbaa !5
  br label %12

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

16:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  br label %24

17:                                               ; preds = %12
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds i64, ptr %11, i64 %18
  %20 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERl(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %19)
  br label %21

21:                                               ; preds = %17
  %22 = load i64, ptr %4, align 8, !tbaa !5
  %23 = add nsw i64 %22, 1
  store i64 %23, ptr %4, align 8, !tbaa !5
  br label %12, !llvm.loop !9

24:                                               ; preds = %16
  %25 = load i64, ptr %1, align 8, !tbaa !5
  %26 = getelementptr inbounds i64, ptr %11, i64 %25
  call void @_ZSt4sortIPlEvT_S1_(ptr noundef %11, ptr noundef %26)
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  store i64 2000000000000000000, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  store i64 0, ptr %6, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %44, %24
  %28 = load i64, ptr %6, align 8, !tbaa !5
  %29 = load i64, ptr %1, align 8, !tbaa !5
  %30 = sub nsw i64 %29, 2
  %31 = icmp slt i64 %28, %30
  br i1 %31, label %33, label %32

32:                                               ; preds = %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br label %47

33:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #5
  %34 = load i64, ptr %6, align 8, !tbaa !5
  %35 = add nsw i64 %34, 2
  %36 = getelementptr inbounds i64, ptr %11, i64 %35
  %37 = load i64, ptr %36, align 8, !tbaa !5
  %38 = load i64, ptr %6, align 8, !tbaa !5
  %39 = getelementptr inbounds i64, ptr %11, i64 %38
  %40 = load i64, ptr %39, align 8, !tbaa !5
  %41 = sub nsw i64 %37, %40
  store i64 %41, ptr %7, align 8, !tbaa !5
  %42 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIlERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %7)
  %43 = load i64, ptr %42, align 8, !tbaa !5
  store i64 %43, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  br label %44

44:                                               ; preds = %33
  %45 = load i64, ptr %6, align 8, !tbaa !5
  %46 = add nsw i64 %45, 1
  store i64 %46, ptr %6, align 8, !tbaa !5
  br label %27, !llvm.loop !11

47:                                               ; preds = %32
  %48 = load i64, ptr %5, align 8, !tbaa !5
  %49 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEl(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %48)
  %50 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %49, ptr noundef @.str)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  %51 = load ptr, ptr %2, align 8
  call void @llvm.stackrestore.p0(ptr %51)
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #5
  ret void
}

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

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERl(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #2

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

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIPlEvT_S1_(ptr noundef, ptr noundef) #3

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIlERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #4

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #3

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEl(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #2

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 = { nocallback nofree nosync nounwind willreturn }
attributes #3 = { inlinehint 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 #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 = !{!"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}


; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5solvev() 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) #5
  %4 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERl(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %1)
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %6 = call ptr @llvm.stacksave.p0()
  %7 = alloca i64, i64 %5, align 16
  %8 = load i64, ptr %1, align 8, !tbaa !5
  %9 = icmp sgt i64 %8, 0
  br i1 %9, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %0
  %.lcssa = phi i64 [ %8, %0 ], [ %16, %.lr.ph ]
  %10 = getelementptr inbounds i64, ptr %7, i64 %.lcssa
  call void @_ZSt4sortIPlEvT_S1_(ptr noundef nonnull %7, ptr noundef nonnull %10)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #5
  store i64 2000000000000000000, ptr %2, align 8, !tbaa !5
  %11 = load i64, ptr %1, align 8, !tbaa !5
  %12 = icmp sgt i64 %11, 2
  br i1 %12, label %.lr.ph12, label %._crit_edge13

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.079 = phi i64 [ %15, %.lr.ph ], [ 0, %0 ]
  %13 = getelementptr inbounds i64, ptr %7, i64 %.079
  %14 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERl(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %13)
  %15 = add nuw nsw i64 %.079, 1
  %16 = load i64, ptr %1, align 8, !tbaa !5
  %17 = icmp slt i64 %15, %16
  br i1 %17, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge13:                                    ; preds = %.lr.ph12, %._crit_edge
  %18 = phi i64 [ 2000000000000000000, %._crit_edge ], [ %27, %.lr.ph12 ]
  %19 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEl(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %18)
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %19, ptr noundef nonnull @.str)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #5
  call void @llvm.stackrestore.p0(ptr %6)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #5
  ret void

.lr.ph12:                                         ; preds = %._crit_edge, %.lr.ph12
  %.010 = phi i64 [ %28, %.lr.ph12 ], [ 0, %._crit_edge ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #5
  %21 = getelementptr inbounds i64, ptr %7, i64 %.010
  %22 = getelementptr inbounds i8, ptr %21, i64 16
  %23 = load i64, ptr %22, align 8, !tbaa !5
  %24 = load i64, ptr %21, align 8, !tbaa !5
  %25 = sub nsw i64 %23, %24
  store i64 %25, ptr %3, align 8, !tbaa !5
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIlERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %27 = load i64, ptr %26, align 8, !tbaa !5
  store i64 %27, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #5
  %28 = add nuw nsw i64 %.010, 1
  %29 = load i64, ptr %1, align 8, !tbaa !5
  %30 = add nsw i64 %29, -2
  %31 = icmp slt i64 %28, %30
  br i1 %31, label %.lr.ph12, label %._crit_edge13, !llvm.loop !11
}

; 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 uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERl(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #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: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIPlEvT_S1_(ptr noundef, ptr noundef) local_unnamed_addr #3

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIlERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #4

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #3

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

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #2

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nosync nounwind willreturn }
attributes #3 = { inlinehint 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 #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 = !{!"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: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass