; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/Good Bye 2015/Problem A (A)

; 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::set" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<long long, long long, std::_Identity<long long>, std::less<long long>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<long long, long long, std::_Identity<long long>, std::less<long long>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }
%"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" }
%"struct.std::pair" = type <{ %"struct.std::_Rb_tree_const_iterator", i8, [7 x i8] }>
%"struct.std::_Rb_tree_const_iterator" = type { ptr }

@year = external dso_local global i64, align 8
@a = external dso_local global i64, align 8
@b = external dso_local global i64, align 8
@s = external dso_local global %"class.std::set", align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i32, align 4
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca %"struct.std::pair", align 8
  store i32 0, ptr %1, align 4
  %8 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) @a)
  %9 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) %8, ptr noundef nonnull align 8 dereferenceable(8) @b)
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #5
  store i64 0, ptr %2, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %52, %0
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = icmp slt i64 %11, 64
  br i1 %12, label %14, label %13

13:                                               ; preds = %10
  store i32 2, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #5
  br label %55

14:                                               ; preds = %10
  %15 = load i64, ptr %2, align 8, !tbaa !5
  %16 = shl i64 1, %15
  %17 = sub nsw i64 %16, 1
  store i64 %17, ptr @year, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  store i64 0, ptr %4, align 8, !tbaa !5
  br label %18

18:                                               ; preds = %48, %14
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = load i64, ptr %2, align 8, !tbaa !5
  %21 = sub nsw i64 %20, 1
  %22 = icmp slt i64 %19, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %18
  store i32 5, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  br label %51

24:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = shl i64 1, %25
  store i64 %26, ptr %5, align 8, !tbaa !5
  %27 = load i64, ptr @a, align 8, !tbaa !5
  %28 = load i64, ptr @year, align 8, !tbaa !5
  %29 = load i64, ptr %5, align 8, !tbaa !5
  %30 = sub nsw i64 %28, %29
  %31 = icmp sle i64 %27, %30
  br i1 %31, label %32, label %47

32:                                               ; preds = %24
  %33 = load i64, ptr @year, align 8, !tbaa !5
  %34 = load i64, ptr %5, align 8, !tbaa !5
  %35 = sub nsw i64 %33, %34
  %36 = load i64, ptr @b, align 8, !tbaa !5
  %37 = icmp sle i64 %35, %36
  br i1 %37, label %38, label %47

38:                                               ; preds = %32
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %39 = load i64, ptr @year, align 8, !tbaa !5
  %40 = load i64, ptr %5, align 8, !tbaa !5
  %41 = sub nsw i64 %39, %40
  store i64 %41, ptr %6, align 8, !tbaa !5
  %42 = call { ptr, i8 } @_ZNSt3setIxSt4lessIxESaIxEE6insertEOx(ptr noundef nonnull align 8 dereferenceable(48) @s, ptr noundef nonnull align 8 dereferenceable(8) %6)
  %43 = getelementptr inbounds { ptr, i8 }, ptr %7, i32 0, i32 0
  %44 = extractvalue { ptr, i8 } %42, 0
  store ptr %44, ptr %43, align 8
  %45 = getelementptr inbounds { ptr, i8 }, ptr %7, i32 0, i32 1
  %46 = extractvalue { ptr, i8 } %42, 1
  store i8 %46, ptr %45, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br label %47

47:                                               ; preds = %38, %32, %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  br label %48

48:                                               ; preds = %47
  %49 = load i64, ptr %4, align 8, !tbaa !5
  %50 = add nsw i64 %49, 1
  store i64 %50, ptr %4, align 8, !tbaa !5
  br label %18, !llvm.loop !9

51:                                               ; preds = %23
  br label %52

52:                                               ; preds = %51
  %53 = load i64, ptr %2, align 8, !tbaa !5
  %54 = add nsw i64 %53, 1
  store i64 %54, ptr %2, align 8, !tbaa !5
  br label %10, !llvm.loop !11

55:                                               ; preds = %13
  %56 = call noundef i64 @_ZNKSt3setIxSt4lessIxESaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(48) @s) #5
  %57 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEm(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %56)
  %58 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %57, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  ret i32 0
}

; 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)) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt3setIxSt4lessIxESaIxEE6insertEOx(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt3setIxSt4lessIxESaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(48)) #3 align 2

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #4

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 = { 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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 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::set" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<long long, long long, std::_Identity<long long>, std::less<long long>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<long long, long long, std::_Identity<long long>, std::less<long long>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }
%"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" }

@year = external dso_local local_unnamed_addr global i64, align 8
@a = external dso_local global i64, align 8
@b = external dso_local global i64, align 8
@s = external dso_local global %"class.std::set", align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) @a)
  %3 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 8 dereferenceable(8) @b)
  br label %8

4:                                                ; preds = %._crit_edge
  %5 = call noundef i64 @_ZNKSt3setIxSt4lessIxESaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(48) @s) #5
  %6 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEm(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %5)
  %7 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  ret i32 0

8:                                                ; preds = %0, %._crit_edge
  %indvars.iv = phi i64 [ -1, %0 ], [ %indvars.iv.next, %._crit_edge ]
  %.014 = phi i64 [ 0, %0 ], [ %11, %._crit_edge ]
  %notmask = shl nsw i64 -1, %.014
  %9 = xor i64 %notmask, -1
  store i64 %9, ptr @year, align 8, !tbaa !5
  %10 = icmp ugt i64 %.014, 1
  br i1 %10, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %8
  %.pre16 = load i64, ptr @a, align 8, !tbaa !5
  %.pre20 = load i64, ptr @b, align 8
  br label %.lr.ph

._crit_edge:                                      ; preds = %18, %8
  %11 = add nuw nsw i64 %.014, 1
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %exitcond15.not = icmp eq i64 %11, 64
  br i1 %exitcond15.not, label %4, label %8, !llvm.loop !9

.lr.ph:                                           ; preds = %.lr.ph.preheader, %18
  %12 = phi i64 [ %19, %18 ], [ %.pre20, %.lr.ph.preheader ]
  %13 = phi i64 [ %20, %18 ], [ %9, %.lr.ph.preheader ]
  %14 = phi i64 [ %21, %18 ], [ %.pre16, %.lr.ph.preheader ]
  %.01013 = phi i64 [ %22, %18 ], [ 0, %.lr.ph.preheader ]
  %.neg = shl nsw i64 -1, %.01013
  %15 = add i64 %13, %.neg
  %.not = icmp sgt i64 %14, %15
  %.not12 = icmp sgt i64 %15, %12
  %or.cond = select i1 %.not, i1 true, i1 %.not12
  br i1 %or.cond, label %18, label %16

16:                                               ; preds = %.lr.ph
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #5
  store i64 %15, ptr %1, align 8, !tbaa !5
  %17 = call { ptr, i8 } @_ZNSt3setIxSt4lessIxESaIxEE6insertEOx(ptr noundef nonnull align 8 dereferenceable(48) @s, ptr noundef nonnull align 8 dereferenceable(8) %1)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #5
  %.pre = load i64, ptr @a, align 8, !tbaa !5
  %.pre17 = load i64, ptr @year, align 8, !tbaa !5
  %.pre19 = load i64, ptr @b, align 8
  br label %18

18:                                               ; preds = %16, %.lr.ph
  %19 = phi i64 [ %.pre19, %16 ], [ %12, %.lr.ph ]
  %20 = phi i64 [ %.pre17, %16 ], [ %13, %.lr.ph ]
  %21 = phi i64 [ %.pre, %16 ], [ %14, %.lr.ph ]
  %22 = add nuw nsw i64 %.01013, 1
  %exitcond.not = icmp eq i64 %22, %indvars.iv
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11
}

; 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 #1 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt3setIxSt4lessIxESaIxEE6insertEOx(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt3setIxSt4lessIxESaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #4

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 = { 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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 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,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass