; LLVM IR from eyangch/competitive-programming :: Codeforces/1559/e.ll (Z3dfsxxx)

; 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::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<std::pair<long long, bool>, std::allocator<std::pair<long long, bool>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<long long, bool>, std::allocator<std::pair<long long, bool>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<long long, bool>, std::allocator<std::pair<long long, bool>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<long long, bool>, std::allocator<std::pair<long long, bool>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::pair" = type <{ i64, i8, [7 x i8] }>

@M = external dso_local global i64, align 8
@pr = external dso_local global %"class.std::vector", align 8
@nm = external dso_local global %"class.std::vector.0", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca %"struct.std::pair", align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = load i64, ptr %5, align 8, !tbaa !5
  %13 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @pr, i64 noundef %12) #3
  %14 = load i64, ptr %13, align 8, !tbaa !5
  %15 = mul nsw i64 %11, %14
  store i64 %15, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %16 = load i64, ptr %6, align 8, !tbaa !5
  %17 = and i64 %16, 1
  store i64 %17, ptr %9, align 8, !tbaa !5
  call void @_ZNSt4pairIxbEC2IRxxTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 8 dereferenceable(9) %8, ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %9)
  call void @_ZNSt6vectorISt4pairIxbESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24) @nm, ptr noundef nonnull align 8 dereferenceable(9) %8)
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  %18 = load i64, ptr %5, align 8, !tbaa !5
  %19 = add nsw i64 %18, 1
  store i64 %19, ptr %10, align 8, !tbaa !5
  br label %20

20:                                               ; preds = %39, %3
  %21 = load i64, ptr %10, align 8, !tbaa !5
  %22 = call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @pr) #3
  %23 = icmp ult i64 %21, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  br label %42

25:                                               ; preds = %20
  %26 = load i64, ptr %7, align 8, !tbaa !5
  %27 = load i64, ptr %10, align 8, !tbaa !5
  %28 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @pr, i64 noundef %27) #3
  %29 = load i64, ptr %28, align 8, !tbaa !5
  %30 = mul nsw i64 %26, %29
  %31 = load i64, ptr @M, align 8, !tbaa !5
  %32 = icmp sgt i64 %30, %31
  br i1 %32, label %33, label %34

33:                                               ; preds = %25
  br label %39

34:                                               ; preds = %25
  %35 = load i64, ptr %7, align 8, !tbaa !5
  %36 = load i64, ptr %10, align 8, !tbaa !5
  %37 = load i64, ptr %6, align 8, !tbaa !5
  %38 = add nsw i64 %37, 1
  call void @_Z3dfsxxx(i64 noundef %35, i64 noundef %36, i64 noundef %38)
  br label %39

39:                                               ; preds = %34, %33
  %40 = load i64, ptr %10, align 8, !tbaa !5
  %41 = add nsw i64 %40, 1
  store i64 %41, ptr %10, align 8, !tbaa !5
  br label %20, !llvm.loop !9

42:                                               ; preds = %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  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 nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxbESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(9)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIxbEC2IRxxTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 8 dereferenceable(9), ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #2 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: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 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 = { 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 #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::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<std::pair<long long, bool>, std::allocator<std::pair<long long, bool>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<long long, bool>, std::allocator<std::pair<long long, bool>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<long long, bool>, std::allocator<std::pair<long long, bool>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<long long, bool>, std::allocator<std::pair<long long, bool>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::pair" = type <{ i64, i8, [7 x i8] }>

@M = external dso_local local_unnamed_addr global i64, align 8
@pr = external dso_local global %"class.std::vector", align 8
@nm = external dso_local global %"class.std::vector.0", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = alloca i64, align 8
  %5 = alloca %"struct.std::pair", align 8
  %6 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %7 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @pr, i64 noundef %1) #3
  %8 = load i64, ptr %7, align 8, !tbaa !5
  %9 = mul nsw i64 %8, %0
  store i64 %9, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %5) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #3
  %10 = and i64 %2, 1
  store i64 %10, ptr %6, align 8, !tbaa !5
  call void @_ZNSt4pairIxbEC2IRxxTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 8 dereferenceable(9) %5, ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %6)
  call void @_ZNSt6vectorISt4pairIxbESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24) @nm, ptr noundef nonnull align 8 dereferenceable(9) %5)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %5) #3
  %.09 = add nsw i64 %1, 1
  %11 = call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @pr) #3
  %12 = icmp ult i64 %.09, %11
  br i1 %12, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3
  %13 = add nsw i64 %2, 1
  br label %14

._crit_edge:                                      ; preds = %23, %3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  ret void

14:                                               ; preds = %.lr.ph, %23
  %.010 = phi i64 [ %.09, %.lr.ph ], [ %.0, %23 ]
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @pr, i64 noundef %.010) #3
  %17 = load i64, ptr %16, align 8, !tbaa !5
  %18 = mul nsw i64 %17, %15
  %19 = load i64, ptr @M, align 8, !tbaa !5
  %20 = icmp sgt i64 %18, %19
  br i1 %20, label %23, label %21

21:                                               ; preds = %14
  %22 = load i64, ptr %4, align 8, !tbaa !5
  call void @_Z3dfsxxx(i64 noundef %22, i64 noundef %.010, i64 noundef %13)
  br label %23

23:                                               ; preds = %14, %21
  %.0 = add nuw nsw i64 %.010, 1
  %24 = call noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @pr) #3
  %25 = icmp ult i64 %.0, %24
  br i1 %25, label %14, label %._crit_edge, !llvm.loop !9
}

; 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 nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxbESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(9)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIxbEC2IRxxTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 8 dereferenceable(9), ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #2 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: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIxSaIxEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 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 = { 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 #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"}


; Effective O3 passes: GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass