; LLVM IR from upupming/algorithm :: acwing/算法基础课/第四讲 数学知识/博弈论/894. 拆分-Nim游戏.ll (Z2sgi)

; 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_set" = 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 }
%"struct.std::pair" = type <{ %"struct.std::__detail::_Node_iterator", i8, [7 x i8] }>
%"struct.std::__detail::_Node_iterator" = type { %"struct.std::__detail::_Node_iterator_base" }
%"struct.std::__detail::_Node_iterator_base" = type { ptr }

@f = external dso_local global [110 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z2sgi(i32 noundef %0) #0 personality ptr @__gxx_personality_v0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca %"class.std::unordered_set", align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca %"struct.std::pair", align 8
  %12 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [110 x i32], ptr @f, i64 0, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = icmp ne i32 %16, -1
  br i1 %17, label %18, label %23

18:                                               ; preds = %1
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [110 x i32], ptr @f, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  store i32 %22, ptr %2, align 4
  br label %79

23:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 56, ptr %4) #4
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(56) %4) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %57, %23
  %25 = load i32, ptr %5, align 4, !tbaa !5
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = icmp slt i32 %25, %26
  br i1 %27, label %29, label %28

28:                                               ; preds = %24
  store i32 2, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %60

29:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %30

30:                                               ; preds = %49, %29
  %31 = load i32, ptr %7, align 4, !tbaa !5
  %32 = load i32, ptr %5, align 4, !tbaa !5
  %33 = icmp sle i32 %31, %32
  br i1 %33, label %35, label %34

34:                                               ; preds = %30
  store i32 5, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  br label %56

35:                                               ; preds = %30
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = invoke noundef i32 @_Z2sgi(i32 noundef %36)
          to label %38 unwind label %52

38:                                               ; preds = %35
  %39 = load i32, ptr %7, align 4, !tbaa !5
  %40 = invoke noundef i32 @_Z2sgi(i32 noundef %39)
          to label %41 unwind label %52

41:                                               ; preds = %38
  %42 = xor i32 %37, %40
  store i32 %42, ptr %8, align 4, !tbaa !5
  %43 = invoke { ptr, i8 } @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE6insertEOi(ptr noundef nonnull align 8 dereferenceable(56) %4, ptr noundef nonnull align 4 dereferenceable(4) %8)
          to label %44 unwind label %52

44:                                               ; preds = %41
  %45 = getelementptr inbounds { ptr, i8 }, ptr %11, i32 0, i32 0
  %46 = extractvalue { ptr, i8 } %43, 0
  store ptr %46, ptr %45, align 8
  %47 = getelementptr inbounds { ptr, i8 }, ptr %11, i32 0, i32 1
  %48 = extractvalue { ptr, i8 } %43, 1
  store i8 %48, ptr %47, align 8
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %49

49:                                               ; preds = %44
  %50 = load i32, ptr %7, align 4, !tbaa !5
  %51 = add nsw i32 %50, 1
  store i32 %51, ptr %7, align 4, !tbaa !5
  br label %30, !llvm.loop !9

52:                                               ; preds = %41, %38, %35
  %53 = landingpad { ptr, i32 }
          cleanup
  %54 = extractvalue { ptr, i32 } %53, 0
  store ptr %54, ptr %9, align 8
  %55 = extractvalue { ptr, i32 } %53, 1
  store i32 %55, ptr %10, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %78

56:                                               ; preds = %34
  br label %57

57:                                               ; preds = %56
  %58 = load i32, ptr %5, align 4, !tbaa !5
  %59 = add nsw i32 %58, 1
  store i32 %59, ptr %5, align 4, !tbaa !5
  br label %24, !llvm.loop !11

60:                                               ; preds = %28
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #4
  store i32 0, ptr %12, align 4, !tbaa !5
  br label %61

61:                                               ; preds = %75, %60
  %62 = invoke noundef i64 @_ZNKSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE5countERKi(ptr noundef nonnull align 8 dereferenceable(56) %4, ptr noundef nonnull align 4 dereferenceable(4) %12)
          to label %63 unwind label %70

63:                                               ; preds = %61
  %64 = icmp ne i64 %62, 0
  br i1 %64, label %74, label %65

65:                                               ; preds = %63
  %66 = load i32, ptr %12, align 4, !tbaa !5
  %67 = load i32, ptr %3, align 4, !tbaa !5
  %68 = sext i32 %67 to i64
  %69 = getelementptr inbounds [110 x i32], ptr @f, i64 0, i64 %68
  store i32 %66, ptr %69, align 4, !tbaa !5
  store i32 %66, ptr %2, align 4
  store i32 1, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #4
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56) %4) #4
  call void @llvm.lifetime.end.p0(i64 56, ptr %4) #4
  br label %79

70:                                               ; preds = %61
  %71 = landingpad { ptr, i32 }
          cleanup
  %72 = extractvalue { ptr, i32 } %71, 0
  store ptr %72, ptr %9, align 8
  %73 = extractvalue { ptr, i32 } %71, 1
  store i32 %73, ptr %10, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #4
  br label %78

74:                                               ; preds = %63
  br label %75

75:                                               ; preds = %74
  %76 = load i32, ptr %12, align 4, !tbaa !5
  %77 = add nsw i32 %76, 1
  store i32 %77, ptr %12, align 4, !tbaa !5
  br label %61, !llvm.loop !12

78:                                               ; preds = %70, %52
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56) %4) #4
  call void @llvm.lifetime.end.p0(i64 56, ptr %4) #4
  br label %81

79:                                               ; preds = %65, %18
  %80 = load i32, ptr %2, align 4
  ret i32 %80

81:                                               ; preds = %78
  %82 = load ptr, ptr %9, align 8
  %83 = load i32, ptr %10, align 4
  %84 = insertvalue { ptr, i32 } poison, ptr %82, 0
  %85 = insertvalue { ptr, i32 } %84, i32 %83, 1
  resume { ptr, i32 } %85
}

; 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 void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(56)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE6insertEOi(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNKSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE5countERKi(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56)) unnamed_addr #3 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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !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::unordered_set" = 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 }

@f = external dso_local local_unnamed_addr global [110 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z2sgi(i32 noundef %0) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %2 = alloca %"class.std::unordered_set", align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = sext i32 %0 to i64
  %6 = getelementptr inbounds [110 x i32], ptr @f, i64 0, i64 %5
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %.not = icmp eq i32 %7, -1
  br i1 %.not, label %8, label %33

8:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 56, ptr nonnull %2) #4
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(56) %2) #4
  %9 = icmp sgt i32 %0, 0
  br i1 %9, label %.preheader, label %._crit_edge

.preheader:                                       ; preds = %8, %10
  %indvars.iv = phi i32 [ %indvars.iv.next, %10 ], [ 1, %8 ]
  %.01322 = phi i32 [ %11, %10 ], [ 0, %8 ]
  br label %12

._crit_edge:                                      ; preds = %10, %8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #4
  br label %23

10:                                               ; preds = %19
  %11 = add nuw nsw i32 %.01322, 1
  %indvars.iv.next = add nuw i32 %indvars.iv, 1
  %exitcond23.not = icmp eq i32 %11, %0
  br i1 %exitcond23.not, label %._crit_edge, label %.preheader, !llvm.loop !9

12:                                               ; preds = %.preheader, %19
  %.01621 = phi i32 [ 0, %.preheader ], [ %20, %19 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  %13 = invoke noundef i32 @_Z2sgi(i32 noundef %.01322)
          to label %14 unwind label %21

14:                                               ; preds = %12
  %15 = invoke noundef i32 @_Z2sgi(i32 noundef %.01621)
          to label %16 unwind label %21

16:                                               ; preds = %14
  %17 = xor i32 %15, %13
  store i32 %17, ptr %3, align 4, !tbaa !5
  %18 = invoke { ptr, i8 } @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE6insertEOi(ptr noundef nonnull align 8 dereferenceable(56) %2, ptr noundef nonnull align 4 dereferenceable(4) %3)
          to label %19 unwind label %21

19:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  %20 = add nuw nsw i32 %.01621, 1
  %exitcond.not = icmp eq i32 %20, %indvars.iv
  br i1 %exitcond.not, label %10, label %12, !llvm.loop !11

21:                                               ; preds = %16, %14, %12
  %22 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  br label %32

23:                                               ; preds = %30, %._crit_edge
  %storemerge = phi i32 [ 0, %._crit_edge ], [ %31, %30 ]
  store i32 %storemerge, ptr %4, align 4, !tbaa !5
  %24 = invoke noundef i64 @_ZNKSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE5countERKi(ptr noundef nonnull align 8 dereferenceable(56) %2, ptr noundef nonnull align 4 dereferenceable(4) %4)
          to label %25 unwind label %28

25:                                               ; preds = %23
  %.not18 = icmp eq i64 %24, 0
  %26 = load i32, ptr %4, align 4, !tbaa !5
  br i1 %.not18, label %27, label %30

27:                                               ; preds = %25
  store i32 %26, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #4
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56) %2) #4
  call void @llvm.lifetime.end.p0(i64 56, ptr nonnull %2) #4
  br label %33

28:                                               ; preds = %23
  %29 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #4
  br label %32

30:                                               ; preds = %25
  %31 = add nsw i32 %26, 1
  br label %23, !llvm.loop !12

32:                                               ; preds = %28, %21
  %.pn = phi { ptr, i32 } [ %22, %21 ], [ %29, %28 ]
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56) %2) #4
  call void @llvm.lifetime.end.p0(i64 56, ptr nonnull %2) #4
  resume { ptr, i32 } %.pn

33:                                               ; preds = %1, %27
  %.0 = phi i32 [ %26, %27 ], [ %7, %1 ]
  ret i32 %.0
}

; 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 void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(56)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE6insertEOi(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; 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 uwtable
declare dso_local noundef i64 @_ZNKSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE5countERKi(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56)) unnamed_addr #3 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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass