; LLVM IR from kazunetakahashi/atcoder :: 2019/1102_future-contest-2020-qual/A.ll (ZN5Field12reduce_scoreEv)

; 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.Field = type <{ i32, i32, %"class.std::vector.19", %"class.std::vector.24", %"class.std::vector.9", %"class.std::tuple", i8, [7 x i8] }>
%"class.std::vector.19" = type { %"struct.std::_Vector_base.20" }
%"struct.std::_Vector_base.20" = type { %"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<int>, std::allocator<std::vector<int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.24" = type { %"struct.std::_Vector_base.25" }
%"struct.std::_Vector_base.25" = type { %"struct.std::_Vector_base<std::vector<State>, std::allocator<std::vector<State>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<State>, std::allocator<std::vector<State>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<State>, std::allocator<std::vector<State>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<State>, std::allocator<std::vector<State>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.9" = type { %"struct.std::_Vector_base.10" }
%"struct.std::_Vector_base.10" = type { %"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::tuple" = type { %"struct.std::_Tuple_impl" }
%"struct.std::_Tuple_impl" = type { %"struct.std::_Tuple_impl.0", %"struct.std::_Head_base.1" }
%"struct.std::_Tuple_impl.0" = type { %"struct.std::_Head_base" }
%"struct.std::_Head_base" = type { i32 }
%"struct.std::_Head_base.1" = type { i32 }

@_ZN5Field1NE = external dso_local global i32, align 4

; 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 nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_I5StateSaIS0_EESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorI5StateSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN5Field12reduce_scoreEv(ptr noundef nonnull align 8 dereferenceable(89) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %7 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 242, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %60, %1
  %9 = load i32, ptr %4, align 4, !tbaa !9
  %10 = load i32, ptr @_ZN5Field1NE, align 4, !tbaa !9
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %8
  store i32 2, ptr %5, align 4
  br label %63

13:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %54, %13
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = load i32, ptr @_ZN5Field1NE, align 4, !tbaa !9
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  store i32 5, ptr %5, align 4
  br label %57

19:                                               ; preds = %14
  %20 = getelementptr inbounds %class.Field, ptr %7, i32 0, i32 2
  %21 = load i32, ptr %4, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %20, i64 noundef %22) #2
  %24 = load i32, ptr %6, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %23, i64 noundef %25) #2
  %27 = load i32, ptr %26, align 4, !tbaa !9
  %28 = icmp eq i32 %27, -1
  br i1 %28, label %29, label %53

29:                                               ; preds = %19
  %30 = getelementptr inbounds %class.Field, ptr %7, i32 0, i32 3
  %31 = load i32, ptr %4, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_I5StateSaIS0_EESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %30, i64 noundef %32) #2
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorI5StateSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %33, i64 noundef %35) #2
  %37 = load i32, ptr %36, align 4, !tbaa !11
  %38 = icmp eq i32 %37, 0
  br i1 %38, label %39, label %53

39:                                               ; preds = %29
  %40 = getelementptr inbounds %class.Field, ptr %7, i32 0, i32 2
  %41 = load i32, ptr %4, align 4, !tbaa !9
  %42 = sext i32 %41 to i64
  %43 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %40, i64 noundef %42) #2
  %44 = load i32, ptr %6, align 4, !tbaa !9
  %45 = sext i32 %44 to i64
  %46 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %43, i64 noundef %45) #2
  store i32 0, ptr %46, align 4, !tbaa !9
  %47 = load i32, ptr %3, align 4, !tbaa !9
  %48 = add nsw i32 %47, -1
  store i32 %48, ptr %3, align 4, !tbaa !9
  %49 = load i32, ptr %3, align 4, !tbaa !9
  %50 = icmp eq i32 %49, 0
  br i1 %50, label %51, label %52

51:                                               ; preds = %39
  store i32 1, ptr %5, align 4
  br label %57

52:                                               ; preds = %39
  br label %53

53:                                               ; preds = %52, %29, %19
  br label %54

54:                                               ; preds = %53
  %55 = load i32, ptr %6, align 4, !tbaa !9
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %6, align 4, !tbaa !9
  br label %14, !llvm.loop !13

57:                                               ; preds = %51, %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %58 = load i32, ptr %5, align 4
  switch i32 %58, label %63 [
    i32 5, label %59
  ]

59:                                               ; preds = %57
  br label %60

60:                                               ; preds = %59
  %61 = load i32, ptr %4, align 4, !tbaa !9
  %62 = add nsw i32 %61, 1
  store i32 %62, ptr %4, align 4, !tbaa !9
  br label %8, !llvm.loop !15

63:                                               ; preds = %57, %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %64 = load i32, ptr %5, align 4
  switch i32 %64, label %66 [
    i32 2, label %65
  ]

65:                                               ; preds = %63
  store i32 0, ptr %5, align 4
  br label %66

66:                                               ; preds = %65, %63
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  %67 = load i32, ptr %5, align 4
  switch i32 %67, label %69 [
    i32 0, label %68
    i32 1, label %68
  ]

68:                                               ; preds = %66, %66
  ret void

69:                                               ; preds = %66
  unreachable
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"_ZTS5State", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; 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"

@_ZN5Field1NE = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_I5StateSaIS0_EESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorI5StateSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN5Field12reduce_scoreEv(ptr noundef nonnull align 8 dereferenceable(89) %0) local_unnamed_addr #0 align 2 {
  %2 = load i32, ptr @_ZN5Field1NE, align 4, !tbaa !5
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.preheader.preheader, label %.thread

.preheader.preheader:                             ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = getelementptr inbounds i8, ptr %0, i64 32
  br label %.preheader

.preheader:                                       ; preds = %.preheader.preheader, %._crit_edge
  %6 = phi i32 [ %2, %.preheader.preheader ], [ %24, %._crit_edge ]
  %indvars.iv32 = phi i64 [ 0, %.preheader.preheader ], [ %indvars.iv.next33, %._crit_edge ]
  %.01727 = phi i32 [ 242, %.preheader.preheader ], [ %.118.lcssa, %._crit_edge ]
  %.not24 = icmp sgt i32 %6, 0
  br i1 %.not24, label %.lr.ph, label %.preheader.._crit_edge_crit_edge

.preheader.._crit_edge_crit_edge:                 ; preds = %.preheader
  %.pre = sext i32 %6 to i64
  br label %._crit_edge

.lr.ph:                                           ; preds = %.preheader, %21
  %indvars.iv = phi i64 [ %indvars.iv.next, %21 ], [ 0, %.preheader ]
  %.11825 = phi i32 [ %.2, %21 ], [ %.01727, %.preheader ]
  %7 = tail call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %indvars.iv32) #1
  %8 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %7, i64 noundef %indvars.iv) #1
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = icmp eq i32 %9, -1
  br i1 %10, label %11, label %21

11:                                               ; preds = %.lr.ph
  %12 = tail call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_I5StateSaIS0_EESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %5, i64 noundef %indvars.iv32) #1
  %13 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorI5StateSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %12, i64 noundef %indvars.iv) #1
  %14 = load i32, ptr %13, align 4, !tbaa !9
  %15 = icmp eq i32 %14, 0
  br i1 %15, label %16, label %21

16:                                               ; preds = %11
  %17 = tail call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %indvars.iv32) #1
  %18 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %17, i64 noundef %indvars.iv) #1
  store i32 0, ptr %18, align 4, !tbaa !5
  %19 = add nsw i32 %.11825, -1
  %20 = icmp eq i32 %19, 0
  br i1 %20, label %.thread, label %21

21:                                               ; preds = %.lr.ph, %11, %16
  %.2 = phi i32 [ %19, %16 ], [ %.11825, %11 ], [ %.11825, %.lr.ph ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %22 = load i32, ptr @_ZN5Field1NE, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %.not = icmp slt i64 %indvars.iv.next, %23
  br i1 %.not, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %21, %.preheader.._crit_edge_crit_edge
  %.pre-phi = phi i64 [ %.pre, %.preheader.._crit_edge_crit_edge ], [ %23, %21 ]
  %24 = phi i32 [ %6, %.preheader.._crit_edge_crit_edge ], [ %22, %21 ]
  %.118.lcssa = phi i32 [ %.01727, %.preheader.._crit_edge_crit_edge ], [ %.2, %21 ]
  %indvars.iv.next33 = add nuw nsw i64 %indvars.iv32, 1
  %25 = icmp slt i64 %indvars.iv.next33, %.pre-phi
  br i1 %25, label %.preheader, label %.thread, !llvm.loop !13

.thread:                                          ; preds = %._crit_edge, %16, %1
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

attributes #0 = { 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 #1 = { 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, !10, i64 0}
!10 = !{!"_ZTS5State", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12, !14}
!14 = !{!"llvm.loop.unswitch.partial.disable"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,SCCPPass,SROAPass,SimpleLoopUnswitchPass,SimplifyCFGPass,TailCallElimPass