; LLVM IR from Tunghohin/Competitive_Coding :: Codeforces/cf1675_B.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" }

@a = external dso_local global [50 x i64], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5solvev() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i64, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #4
  %6 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 1, ptr %2, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %17, %0
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = load i32, ptr %1, align 4, !tbaa !5
  %10 = icmp sle i32 %8, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  br label %20

12:                                               ; preds = %7
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [50 x i64], ptr @a, i64 0, i64 %14
  %16 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %15)
  br label %17

17:                                               ; preds = %12
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %2, align 4, !tbaa !5
  br label %7, !llvm.loop !9

20:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  store i64 0, ptr %3, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %21 = load i32, ptr %1, align 4, !tbaa !5
  %22 = sub nsw i32 %21, 1
  store i32 %22, ptr %4, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %70, %20
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = icmp sge i32 %24, 1
  br i1 %25, label %27, label %26

26:                                               ; preds = %23
  store i32 5, ptr %5, align 4
  br label %73

27:                                               ; preds = %23
  br label %28

28:                                               ; preds = %47, %27
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [50 x i64], ptr @a, i64 0, i64 %30
  %32 = load i64, ptr %31, align 8, !tbaa !11
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [50 x i64], ptr @a, i64 0, i64 %35
  %37 = load i64, ptr %36, align 8, !tbaa !11
  %38 = icmp sge i64 %32, %37
  br i1 %38, label %39, label %45

39:                                               ; preds = %28
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds [50 x i64], ptr @a, i64 0, i64 %41
  %43 = load i64, ptr %42, align 8, !tbaa !11
  %44 = icmp ne i64 %43, 0
  br label %45

45:                                               ; preds = %39, %28
  %46 = phi i1 [ false, %28 ], [ %44, %39 ]
  br i1 %46, label %47, label %55

47:                                               ; preds = %45
  %48 = load i32, ptr %4, align 4, !tbaa !5
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds [50 x i64], ptr @a, i64 0, i64 %49
  %51 = load i64, ptr %50, align 8, !tbaa !11
  %52 = sdiv i64 %51, 2
  store i64 %52, ptr %50, align 8, !tbaa !11
  %53 = load i64, ptr %3, align 8, !tbaa !11
  %54 = add nsw i64 %53, 1
  store i64 %54, ptr %3, align 8, !tbaa !11
  br label %28, !llvm.loop !13

55:                                               ; preds = %45
  %56 = load i32, ptr %4, align 4, !tbaa !5
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds [50 x i64], ptr @a, i64 0, i64 %57
  %59 = load i64, ptr %58, align 8, !tbaa !11
  %60 = load i32, ptr %4, align 4, !tbaa !5
  %61 = add nsw i32 %60, 1
  %62 = sext i32 %61 to i64
  %63 = getelementptr inbounds [50 x i64], ptr @a, i64 0, i64 %62
  %64 = load i64, ptr %63, align 8, !tbaa !11
  %65 = icmp eq i64 %59, %64
  br i1 %65, label %66, label %69

66:                                               ; preds = %55
  %67 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef -1)
  %68 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) %67, i8 noundef signext 10)
  store i32 1, ptr %5, align 4
  br label %73

69:                                               ; preds = %55
  br label %70

70:                                               ; preds = %69
  %71 = load i32, ptr %4, align 4, !tbaa !5
  %72 = add nsw i32 %71, -1
  store i32 %72, ptr %4, align 4, !tbaa !5
  br label %23, !llvm.loop !14

73:                                               ; preds = %66, %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  %74 = load i32, ptr %5, align 4
  switch i32 %74, label %79 [
    i32 5, label %75
  ]

75:                                               ; preds = %73
  %76 = load i64, ptr %3, align 8, !tbaa !11
  %77 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %76)
  %78 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) %77, i8 noundef signext 10)
  store i32 0, ptr %5, align 4
  br label %79

79:                                               ; preds = %75, %73
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #4
  %80 = load i32, ptr %5, align 4
  switch i32 %80, label %82 [
    i32 0, label %81
    i32 1, label %81
  ]

81:                                               ; preds = %79, %79
  ret void

82:                                               ; preds = %79
  unreachable
}

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

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(8)) #0 align 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 noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef signext) #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) #0 align 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 = { "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 = { 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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !12, i64 0}
!12 = !{!"long long", !7, i64 0}
!13 = distinct !{!13, !10}
!14 = distinct !{!14, !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" }

@a = external dso_local global [50 x i64], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5solvev() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  %2 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %3 = load i32, ptr %1, align 4, !tbaa !5
  %.not27 = icmp slt i32 %3, 1
  br i1 %.not27, label %..preheader23_crit_edge, label %.lr.ph

..preheader23_crit_edge:                          ; preds = %0
  %.pre = sext i32 %3 to i64
  br label %.preheader23.preheader

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 1, %0 ]
  %4 = getelementptr inbounds [50 x i64], ptr @a, i64 0, i64 %indvars.iv
  %5 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %4)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %6 = load i32, ptr %1, align 4, !tbaa !5
  %7 = sext i32 %6 to i64
  %.not.not = icmp slt i64 %indvars.iv, %7
  br i1 %.not.not, label %.lr.ph, label %.preheader23.preheader, !llvm.loop !9

.preheader23.preheader:                           ; preds = %.lr.ph, %..preheader23_crit_edge
  %indvars.iv44.ph = phi i64 [ %.pre, %..preheader23_crit_edge ], [ %7, %.lr.ph ]
  br label %.preheader23

.preheader23:                                     ; preds = %.preheader23.preheader, %.critedge
  %indvars.iv44 = phi i64 [ %indvars.iv.next45, %.critedge ], [ %indvars.iv44.ph, %.preheader23.preheader ]
  %.015 = phi i64 [ %.1.lcssa, %.critedge ], [ 0, %.preheader23.preheader ]
  %indvars.iv.next45 = add nsw i64 %indvars.iv44, -1
  %8 = icmp slt i64 %indvars.iv44, 2
  br i1 %8, label %.thread, label %.preheader

.preheader:                                       ; preds = %.preheader23
  %9 = getelementptr inbounds [50 x i64], ptr @a, i64 0, i64 %indvars.iv.next45
  %10 = getelementptr inbounds [50 x i64], ptr @a, i64 0, i64 %indvars.iv44
  %.promoted = load i64, ptr %9, align 8, !tbaa !11
  %11 = load i64, ptr %10, align 8, !tbaa !11
  %.not1929 = icmp slt i64 %.promoted, %11
  %.not2030 = icmp eq i64 %.promoted, 0
  %or.cond31 = or i1 %.not2030, %.not1929
  br i1 %or.cond31, label %.critedge, label %.lr.ph33

.lr.ph33:                                         ; preds = %.preheader, %.lr.ph33
  %.132 = phi i64 [ %14, %.lr.ph33 ], [ %.015, %.preheader ]
  %12 = phi i64 [ %13, %.lr.ph33 ], [ %.promoted, %.preheader ]
  %13 = sdiv i64 %12, 2
  %14 = add nsw i64 %.132, 1
  %.not19 = icmp slt i64 %13, %11
  %.off = add i64 %12, 1
  %.not20 = icmp ult i64 %.off, 3
  %or.cond = or i1 %.not20, %.not19
  br i1 %or.cond, label %..critedge_crit_edge, label %.lr.ph33, !llvm.loop !13

..critedge_crit_edge:                             ; preds = %.lr.ph33
  store i64 %13, ptr %9, align 8, !tbaa !11
  br label %.critedge

.critedge:                                        ; preds = %..critedge_crit_edge, %.preheader
  %.1.lcssa = phi i64 [ %14, %..critedge_crit_edge ], [ %.015, %.preheader ]
  %.lcssa24 = phi i64 [ %13, %..critedge_crit_edge ], [ %.promoted, %.preheader ]
  %15 = icmp eq i64 %.lcssa24, %11
  br i1 %15, label %16, label %.preheader23, !llvm.loop !14

16:                                               ; preds = %.critedge
  %17 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef -1)
  br label %19

.thread:                                          ; preds = %.preheader23
  %18 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %.015)
  br label %19

19:                                               ; preds = %16, %.thread
  %.sink = phi ptr [ %17, %16 ], [ %18, %.thread ]
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) %.sink, i8 noundef signext 10)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  ret void
}

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

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(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 memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef signext) local_unnamed_addr #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) local_unnamed_addr #0 align 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 = { "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 = { 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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !12, i64 0}
!12 = !{!"long long", !7, i64 0}
!13 = distinct !{!13, !10}
!14 = distinct !{!14, !10}


; Effective O3 passes: BDCEPass,ConstraintEliminationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass