; LLVM IR from upupming/algorithm :: kick-start/2021/RoundD/D copy.ll (Z1Vx)

; 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::unordered_map" = type { %"class.std::_Hashtable" }
%"class.std::_Hashtable" = type { ptr, i64, %"struct.std::__detail::_Hash_node_base", i64, %"struct.std::__detail::_Prime_rehash_policy", ptr }
%"struct.std::__detail::_Hash_node_base" = type { ptr }
%"struct.std::__detail::_Prime_rehash_policy" = type { float, i64 }
%"class.std::basic_ostream" = type { ptr, %"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 }

@p = external dso_local global i64, align 8
@m1 = external dso_local global %"class.std::unordered_map", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z1Vx(i64 noundef %0) #1 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  %5 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) %5, i64 noundef %6)
  %8 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %9 = call noundef i64 @_ZNKSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEE5countERS5_(ptr noundef nonnull align 8 dereferenceable(56) @m1, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %10 = icmp ne i64 %9, 0
  br i1 %10, label %11, label %14

11:                                               ; preds = %1
  %12 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEEixERS5_(ptr noundef nonnull align 8 dereferenceable(56) @m1, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %13 = load i64, ptr %12, align 8, !tbaa !5
  store i64 %13, ptr %2, align 8
  br label %45

14:                                               ; preds = %1
  %15 = load i64, ptr %3, align 8, !tbaa !5
  %16 = icmp eq i64 %15, 0
  br i1 %16, label %22, label %17

17:                                               ; preds = %14
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = load i64, ptr @p, align 8, !tbaa !5
  %20 = srem i64 %18, %19
  %21 = icmp ne i64 %20, 0
  br i1 %21, label %22, label %24

22:                                               ; preds = %17, %14
  %23 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEEixERS5_(ptr noundef nonnull align 8 dereferenceable(56) @m1, ptr noundef nonnull align 8 dereferenceable(8) %3)
  store i64 0, ptr %23, align 8, !tbaa !5
  store i64 0, ptr %2, align 8
  br label %45

24:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %35, %24
  %26 = load i64, ptr %3, align 8, !tbaa !5
  %27 = icmp sgt i64 %26, 0
  br i1 %27, label %28, label %33

28:                                               ; preds = %25
  %29 = load i64, ptr %3, align 8, !tbaa !5
  %30 = load i64, ptr @p, align 8, !tbaa !5
  %31 = srem i64 %29, %30
  %32 = icmp eq i64 %31, 0
  br label %33

33:                                               ; preds = %28, %25
  %34 = phi i1 [ false, %25 ], [ %32, %28 ]
  br i1 %34, label %35, label %41

35:                                               ; preds = %33
  %36 = load i64, ptr @p, align 8, !tbaa !5
  %37 = load i64, ptr %3, align 8, !tbaa !5
  %38 = sdiv i64 %37, %36
  store i64 %38, ptr %3, align 8, !tbaa !5
  %39 = load i64, ptr %4, align 8, !tbaa !5
  %40 = add nsw i64 %39, 1
  store i64 %40, ptr %4, align 8, !tbaa !5
  br label %25, !llvm.loop !9

41:                                               ; preds = %33
  %42 = load i64, ptr %4, align 8, !tbaa !5
  %43 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEEixERS5_(ptr noundef nonnull align 8 dereferenceable(56) @m1, ptr noundef nonnull align 8 dereferenceable(8) %3)
  store i64 %42, ptr %43, align 8, !tbaa !5
  %44 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %44, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %45

45:                                               ; preds = %41, %22, %11
  %46 = load i64, ptr %2, align 8
  ret i64 %46
}

; 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) #2

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNKSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEE5countERS5_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEEixERS5_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #3 = { 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"}


; 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::unordered_map" = type { %"class.std::_Hashtable" }
%"class.std::_Hashtable" = type { ptr, i64, %"struct.std::__detail::_Hash_node_base", i64, %"struct.std::__detail::_Prime_rehash_policy", ptr }
%"struct.std::__detail::_Hash_node_base" = type { ptr }
%"struct.std::__detail::_Prime_rehash_policy" = type { float, i64 }
%"class.std::basic_ostream" = type { ptr, %"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 }

@p = external dso_local local_unnamed_addr global i64, align 8
@m1 = external dso_local global %"class.std::unordered_map", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z1Vx(i64 noundef %0) local_unnamed_addr #0 {
  %2 = alloca i64, align 8
  store i64 %0, ptr %2, align 8, !tbaa !5
  %3 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str)
  %4 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) %3, i64 noundef %0)
  %5 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %6 = call noundef i64 @_ZNKSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEE5countERS5_(ptr noundef nonnull align 8 dereferenceable(56) @m1, ptr noundef nonnull align 8 dereferenceable(8) %2)
  %.not = icmp eq i64 %6, 0
  br i1 %.not, label %10, label %7

7:                                                ; preds = %1
  %8 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEEixERS5_(ptr noundef nonnull align 8 dereferenceable(56) @m1, ptr noundef nonnull align 8 dereferenceable(8) %2)
  %9 = load i64, ptr %8, align 8, !tbaa !5
  br label %27

10:                                               ; preds = %1
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = icmp eq i64 %11, 0
  br i1 %12, label %16, label %13

13:                                               ; preds = %10
  %14 = load i64, ptr @p, align 8, !tbaa !5
  %15 = srem i64 %11, %14
  %.not7 = icmp eq i64 %15, 0
  br i1 %.not7, label %thread-pre-split, label %16

16:                                               ; preds = %13, %10
  %17 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEEixERS5_(ptr noundef nonnull align 8 dereferenceable(56) @m1, ptr noundef nonnull align 8 dereferenceable(8) %2)
  store i64 0, ptr %17, align 8, !tbaa !5
  br label %27

thread-pre-split:                                 ; preds = %13
  %18 = icmp sgt i64 %11, 0
  br i1 %18, label %.lr.ph, label %.critedge

.lr.ph:                                           ; preds = %thread-pre-split, %23
  %.08 = phi i64 [ %24, %23 ], [ 0, %thread-pre-split ]
  %19 = phi i64 [ %21, %23 ], [ %11, %thread-pre-split ]
  %20 = srem i64 %19, %14
  %21 = sdiv i64 %19, %14
  %22 = icmp eq i64 %20, 0
  br i1 %22, label %23, label %.critedge

23:                                               ; preds = %.lr.ph
  store i64 %21, ptr %2, align 8, !tbaa !5
  %24 = add nuw nsw i64 %.08, 1
  %25 = icmp sgt i64 %21, 0
  br i1 %25, label %.lr.ph, label %.critedge, !llvm.loop !9

.critedge:                                        ; preds = %.lr.ph, %23, %thread-pre-split
  %.0.lcssa = phi i64 [ 0, %thread-pre-split ], [ %24, %23 ], [ %.08, %.lr.ph ]
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEEixERS5_(ptr noundef nonnull align 8 dereferenceable(56) @m1, ptr noundef nonnull align 8 dereferenceable(8) %2)
  store i64 %.0.lcssa, ptr %26, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %.critedge, %16, %7
  %.04 = phi i64 [ %9, %7 ], [ 0, %16 ], [ %.0.lcssa, %.critedge ]
  ret i64 %.04
}

; 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 #1

; 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

; 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 #0 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)) #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNKSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEE5countERS5_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIxxSt4hashIxESt8equal_toIxESaISt4pairIKxxEEEixERS5_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 8 dereferenceable(8)) 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 = { 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" }

!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"}


; Effective O3 passes: DivRemPairsPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass