; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/83 Beta Division 1/Problem A/A.ll (Z3dfsiii)

; 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<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_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<int, std::pair<int, int>>, std::allocator<std::pair<int, std::pair<int, int>>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, std::pair<int, int>>, std::allocator<std::pair<int, std::pair<int, int>>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, std::pair<int, int>>, std::allocator<std::pair<int, std::pair<int, int>>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, std::pair<int, int>>, std::allocator<std::pair<int, std::pair<int, int>>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::pair" = type { i32, %"struct.std::pair.5" }
%"struct.std::pair.5" = type { i32, i32 }

@type = external dso_local global [1001 x i32], align 16
@adj = external dso_local global [1001 x %"class.std::vector"], align 16
@res = external dso_local global %"class.std::vector.0", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca %"struct.std::pair", align 4
  %8 = alloca %"struct.std::pair.5", align 4
  %9 = alloca { i64, i32 }, align 8
  %10 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [1001 x i32], ptr @type, i64 0, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = icmp eq i32 %14, 1
  br i1 %15, label %16, label %19

16:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 12, ptr %7) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %17 = call i64 @_ZSt9make_pairIRiS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %5)
  store i64 %17, ptr %8, align 4
  %18 = call { i64, i32 } @_ZSt9make_pairIRiSt4pairIiiEES1_INSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS3_INS4_IT0_E4typeEE6__typeEEOS5_OSA_(ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(8) %8)
  store { i64, i32 } %18, ptr %9, align 8
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %7, ptr align 8 %9, i64 12, i1 false)
  call void @_ZNSt6vectorISt4pairIiS0_IiiEESaIS2_EE9push_backEOS2_(ptr noundef nonnull align 8 dereferenceable(24) @res, ptr noundef nonnull align 4 dereferenceable(12) %7)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  call void @llvm.lifetime.end.p0(i64 12, ptr %7) #5
  br label %52

19:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #5
  store i32 0, ptr %10, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %48, %19
  %21 = load i32, ptr %10, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [1001 x %"class.std::vector"], ptr @adj, i64 0, i64 %24
  %26 = call noundef i64 @_ZNKSt6vectorISt4pairIiiESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %25) #5
  %27 = icmp ult i64 %22, %26
  br i1 %27, label %29, label %28

28:                                               ; preds = %20
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #5
  br label %51

29:                                               ; preds = %20
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [1001 x %"class.std::vector"], ptr @adj, i64 0, i64 %31
  %33 = load i32, ptr %10, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %32, i64 noundef %34) #5
  %36 = getelementptr inbounds %"struct.std::pair.5", ptr %35, i32 0, i32 0
  %37 = load i32, ptr %36, align 4, !tbaa !9
  %38 = load i32, ptr %4, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [1001 x %"class.std::vector"], ptr @adj, i64 0, i64 %39
  %41 = load i32, ptr %10, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %40, i64 noundef %42) #5
  %44 = getelementptr inbounds %"struct.std::pair.5", ptr %43, i32 0, i32 1
  %45 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %44)
  %46 = load i32, ptr %45, align 4, !tbaa !5
  %47 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z3dfsiii(i32 noundef %37, i32 noundef %46, i32 noundef %47)
  br label %48

48:                                               ; preds = %29
  %49 = load i32, ptr %10, align 4, !tbaa !5
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %10, align 4, !tbaa !5
  br label %20, !llvm.loop !11

51:                                               ; preds = %28
  br label %52

52:                                               ; preds = %51, %16
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIiS0_IiiEESaIS2_EE9push_backEOS2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(12)) #0 align 2

; 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 dso_local { i64, i32 } @_ZSt9make_pairIRiSt4pairIiiEES1_INSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS3_INS4_IT0_E4typeEE6__typeEEOS5_OSA_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(8)) #0

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZSt9make_pairIRiS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #0

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #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 @_ZNKSt6vectorISt4pairIiiESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #3 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #4

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 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 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}
!11 = distinct !{!11, !12}
!12 = !{!"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<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_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<int, std::pair<int, int>>, std::allocator<std::pair<int, std::pair<int, int>>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, std::pair<int, int>>, std::allocator<std::pair<int, std::pair<int, int>>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, std::pair<int, int>>, std::allocator<std::pair<int, std::pair<int, int>>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, std::pair<int, int>>, std::allocator<std::pair<int, std::pair<int, int>>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::pair" = type { i32, %"struct.std::pair.5" }
%"struct.std::pair.5" = type { i32, i32 }

@type = external dso_local local_unnamed_addr global [1001 x i32], align 16
@adj = external dso_local global [1001 x %"class.std::vector"], align 16
@res = external dso_local global %"class.std::vector.0", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca %"struct.std::pair", align 8
  %8 = alloca %"struct.std::pair.5", align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %9 = sext i32 %0 to i64
  %10 = getelementptr inbounds [1001 x i32], ptr @type, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp eq i32 %11, 1
  br i1 %12, label %15, label %.preheader

.preheader:                                       ; preds = %3
  %13 = getelementptr inbounds [1001 x %"class.std::vector"], ptr @adj, i64 0, i64 %9
  %14 = tail call noundef i64 @_ZNKSt6vectorISt4pairIiiESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %13) #4
  %.not = icmp eq i64 %14, 0
  br i1 %.not, label %.loopexit, label %.lr.ph

15:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 12, ptr nonnull %7) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %8) #4
  %16 = call i64 @_ZSt9make_pairIRiS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %5)
  store i64 %16, ptr %8, align 8
  %17 = call { i64, i32 } @_ZSt9make_pairIRiSt4pairIiiEES1_INSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS3_INS4_IT0_E4typeEE6__typeEEOS5_OSA_(ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(8) %8)
  %.fca.0.extract = extractvalue { i64, i32 } %17, 0
  %.fca.1.extract = extractvalue { i64, i32 } %17, 1
  store i64 %.fca.0.extract, ptr %7, align 8
  %.sroa.2.0..sroa_idx = getelementptr inbounds i8, ptr %7, i64 8
  store i32 %.fca.1.extract, ptr %.sroa.2.0..sroa_idx, align 8
  call void @_ZNSt6vectorISt4pairIiS0_IiiEESaIS2_EE9push_backEOS2_(ptr noundef nonnull align 8 dereferenceable(24) @res, ptr noundef nonnull align 4 dereferenceable(12) %7)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %8) #4
  call void @llvm.lifetime.end.p0(i64 12, ptr nonnull %7) #4
  br label %.loopexit

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.preheader ]
  %18 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %13, i64 noundef %indvars.iv) #4
  %19 = load i32, ptr %18, align 4, !tbaa !9
  %20 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %13, i64 noundef %indvars.iv) #4
  %21 = getelementptr inbounds i8, ptr %20, i64 4
  %22 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %21)
  %23 = load i32, ptr %22, align 4, !tbaa !5
  call void @_Z3dfsiii(i32 noundef %19, i32 noundef %23, i32 noundef %2)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %24 = call noundef i64 @_ZNKSt6vectorISt4pairIiiESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %13) #4
  %25 = icmp ugt i64 %24, %indvars.iv.next
  br i1 %25, label %.lr.ph, label %.loopexit, !llvm.loop !11

.loopexit:                                        ; preds = %.lr.ph, %.preheader, %15
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIiS0_IiiEESaIS2_EE9push_backEOS2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(12)) local_unnamed_addr #0 align 2

; 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 dso_local { i64, i32 } @_ZSt9make_pairIRiSt4pairIiiEES1_INSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS3_INS4_IT0_E4typeEE6__typeEEOS5_OSA_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZSt9make_pairIRiS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0

; 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 @_ZNKSt6vectorISt4pairIiiESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #3

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 = { 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 = { 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 = !{!10, !6, i64 0}
!10 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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