; LLVM IR from AdarshGaur/Competitive-Programming :: Codeforces/Codeforces Round #823 (Div. 2)/B. Meeting on the Line.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 i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #5
  %11 = 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)
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #5
  store i64 2000000000000000000, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #5
  store i64 -2000000000000000000, ptr %3, align 8, !tbaa !5
  %12 = load i64, ptr %1, align 8, !tbaa !5
  %13 = call ptr @llvm.stacksave.p0()
  store ptr %13, ptr %4, align 8
  %14 = alloca i64, i64 %12, align 16
  store i64 %12, ptr %5, align 8
  %15 = load i64, ptr %1, align 8, !tbaa !5
  %16 = alloca i64, i64 %15, align 16
  store i64 %15, ptr %6, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #5
  store i64 0, ptr %7, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %26, %0
  %18 = load i64, ptr %7, align 8, !tbaa !5
  %19 = load i64, ptr %1, align 8, !tbaa !5
  %20 = icmp slt i64 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  br label %29

22:                                               ; preds = %17
  %23 = load i64, ptr %7, align 8, !tbaa !5
  %24 = getelementptr inbounds i64, ptr %14, i64 %23
  %25 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERl(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %24)
  br label %26

26:                                               ; preds = %22
  %27 = load i64, ptr %7, align 8, !tbaa !5
  %28 = add nsw i64 %27, 1
  store i64 %28, ptr %7, align 8, !tbaa !5
  br label %17, !llvm.loop !9

29:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  store i64 0, ptr %8, align 8, !tbaa !5
  br label %30

30:                                               ; preds = %57, %29
  %31 = load i64, ptr %8, align 8, !tbaa !5
  %32 = load i64, ptr %1, align 8, !tbaa !5
  %33 = icmp slt i64 %31, %32
  br i1 %33, label %35, label %34

34:                                               ; preds = %30
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  br label %60

35:                                               ; preds = %30
  %36 = load i64, ptr %8, align 8, !tbaa !5
  %37 = getelementptr inbounds i64, ptr %16, i64 %36
  %38 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERl(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %37)
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  %39 = load i64, ptr %8, align 8, !tbaa !5
  %40 = getelementptr inbounds i64, ptr %14, i64 %39
  %41 = load i64, ptr %40, align 8, !tbaa !5
  %42 = load i64, ptr %8, align 8, !tbaa !5
  %43 = getelementptr inbounds i64, ptr %16, i64 %42
  %44 = load i64, ptr %43, align 8, !tbaa !5
  %45 = sub nsw i64 %41, %44
  store i64 %45, ptr %9, align 8, !tbaa !5
  %46 = 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) %9)
  %47 = load i64, ptr %46, align 8, !tbaa !5
  store i64 %47, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #5
  %48 = load i64, ptr %8, align 8, !tbaa !5
  %49 = getelementptr inbounds i64, ptr %14, i64 %48
  %50 = load i64, ptr %49, align 8, !tbaa !5
  %51 = load i64, ptr %8, align 8, !tbaa !5
  %52 = getelementptr inbounds i64, ptr %16, i64 %51
  %53 = load i64, ptr %52, align 8, !tbaa !5
  %54 = add nsw i64 %50, %53
  store i64 %54, ptr %10, align 8, !tbaa !5
  %55 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3maxIlERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %10)
  %56 = load i64, ptr %55, align 8, !tbaa !5
  store i64 %56, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #5
  br label %57

57:                                               ; preds = %35
  %58 = load i64, ptr %8, align 8, !tbaa !5
  %59 = add nsw i64 %58, 1
  store i64 %59, ptr %8, align 8, !tbaa !5
  br label %30, !llvm.loop !11

60:                                               ; preds = %34
  %61 = load i64, ptr %2, align 8, !tbaa !5
  %62 = sitofp i64 %61 to double
  %63 = load i64, ptr %3, align 8, !tbaa !5
  %64 = load i64, ptr %2, align 8, !tbaa !5
  %65 = sub nsw i64 %63, %64
  %66 = sitofp i64 %65 to double
  %67 = fdiv double %66, 2.000000e+00
  %68 = fadd double %62, %67
  %69 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEd(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, double noundef %68)
  %70 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %69, ptr noundef @.str)
  %71 = load ptr, ptr %4, align 8
  call void @llvm.stackrestore.p0(ptr %71)
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #5
  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 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)) #3

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3maxIlERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #3

; 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) #4

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEd(ptr noundef nonnull align 8 dereferenceable(8), double 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 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 = { 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 #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
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #5
  %6 = 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)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #5
  store i64 2000000000000000000, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #5
  store i64 -2000000000000000000, ptr %3, align 8, !tbaa !5
  %7 = load i64, ptr %1, align 8, !tbaa !5
  %8 = call ptr @llvm.stacksave.p0()
  %9 = alloca i64, i64 %7, align 16
  %10 = load i64, ptr %1, align 8, !tbaa !5
  %11 = alloca i64, i64 %10, align 16
  %12 = icmp sgt i64 %10, 0
  br i1 %12, label %.lr.ph, label %._crit_edge

.preheader:                                       ; preds = %.lr.ph
  %13 = icmp sgt i64 %17, 0
  br i1 %13, label %.lr.ph13, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.01011 = phi i64 [ %16, %.lr.ph ], [ 0, %0 ]
  %14 = getelementptr inbounds i64, ptr %9, i64 %.01011
  %15 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERl(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %14)
  %16 = add nuw nsw i64 %.01011, 1
  %17 = load i64, ptr %1, align 8, !tbaa !5
  %18 = icmp slt i64 %16, %17
  br i1 %18, label %.lr.ph, label %.preheader, !llvm.loop !9

._crit_edge.loopexit:                             ; preds = %.lr.ph13
  %.pre = load i64, ptr %2, align 8, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %0, %._crit_edge.loopexit, %.preheader
  %19 = phi i64 [ %40, %._crit_edge.loopexit ], [ -2000000000000000000, %.preheader ], [ -2000000000000000000, %0 ]
  %20 = phi i64 [ %.pre, %._crit_edge.loopexit ], [ 2000000000000000000, %.preheader ], [ 2000000000000000000, %0 ]
  %21 = sitofp i64 %20 to double
  %22 = sub nsw i64 %19, %20
  %23 = sitofp i64 %22 to double
  %24 = fmul double %23, 5.000000e-01
  %25 = fadd double %24, %21
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEd(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, double noundef %25)
  %27 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %26, ptr noundef nonnull @.str)
  call void @llvm.stackrestore.p0(ptr %8)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #5
  ret void

.lr.ph13:                                         ; preds = %.preheader, %.lr.ph13
  %.012 = phi i64 [ %41, %.lr.ph13 ], [ 0, %.preheader ]
  %28 = getelementptr inbounds i64, ptr %11, i64 %.012
  %29 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERl(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %28)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #5
  %30 = getelementptr inbounds i64, ptr %9, i64 %.012
  %31 = load i64, ptr %30, align 8, !tbaa !5
  %32 = load i64, ptr %28, align 8, !tbaa !5
  %33 = sub nsw i64 %31, %32
  store i64 %33, ptr %4, align 8, !tbaa !5
  %34 = 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) %4)
  %35 = load i64, ptr %34, align 8, !tbaa !5
  store i64 %35, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #5
  %36 = load i64, ptr %30, align 8, !tbaa !5
  %37 = load i64, ptr %28, align 8, !tbaa !5
  %38 = add nsw i64 %37, %36
  store i64 %38, ptr %5, align 8, !tbaa !5
  %39 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3maxIlERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %5)
  %40 = load i64, ptr %39, align 8, !tbaa !5
  store i64 %40, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #5
  %41 = add nuw nsw i64 %.012, 1
  %42 = load i64, ptr %1, align 8, !tbaa !5
  %43 = icmp slt i64 %41, %42
  br i1 %43, label %.lr.ph13, label %._crit_edge.loopexit, !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 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 #3

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3maxIlERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3

; 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 #4

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEd(ptr noundef nonnull align 8 dereferenceable(8), double 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 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 = { 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 #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,ReassociatePass,SROAPass,SimplifyCFGPass