; LLVM IR from sunkafei/xcpc-algorithm-templates :: 算法/数据结构/可持久化整数集合.ll (Z3kthSt6vectorIiSaIiEES1_i)

; 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"

@len = external dso_local global i32, align 4
@info = external dso_local global [210000 x i32], align 16

; 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 void @_Z4leftRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z5rightRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z10left_valueRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z5valueRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z3kthSt6vectorIiSaIiEES1_i(ptr noundef %0, ptr noundef %1, i32 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 1, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %13 = load i32, ptr @len, align 4, !tbaa !9
  store i32 %13, ptr %9, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %35, %3
  %15 = load i32, ptr %8, align 4, !tbaa !9
  %16 = load i32, ptr %9, align 4, !tbaa !9
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %18, label %36

18:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %19 = load i32, ptr %8, align 4, !tbaa !9
  %20 = load i32, ptr %9, align 4, !tbaa !9
  %21 = add nsw i32 %19, %20
  %22 = sdiv i32 %21, 2
  store i32 %22, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %23 = call noundef i32 @_Z10left_valueRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1)
  store i32 %23, ptr %11, align 4, !tbaa !9
  %24 = load i32, ptr %7, align 4, !tbaa !9
  %25 = load i32, ptr %11, align 4, !tbaa !9
  %26 = icmp sle i32 %24, %25
  br i1 %26, label %27, label %29

27:                                               ; preds = %18
  call void @_Z4leftRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1)
  %28 = load i32, ptr %10, align 4, !tbaa !9
  store i32 %28, ptr %9, align 4, !tbaa !9
  br label %35

29:                                               ; preds = %18
  call void @_Z5rightRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1)
  %30 = load i32, ptr %10, align 4, !tbaa !9
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %8, align 4, !tbaa !9
  %32 = load i32, ptr %11, align 4, !tbaa !9
  %33 = load i32, ptr %7, align 4, !tbaa !9
  %34 = sub nsw i32 %33, %32
  store i32 %34, ptr %7, align 4, !tbaa !9
  br label %35

35:                                               ; preds = %29, %27
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %14, !llvm.loop !11

36:                                               ; preds = %14
  %37 = load i32, ptr %7, align 4, !tbaa !9
  %38 = call noundef i32 @_Z5valueRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1)
  %39 = icmp sgt i32 %37, %38
  br i1 %39, label %40, label %41

40:                                               ; preds = %36
  store i32 1073741824, ptr %4, align 4
  store i32 1, ptr %12, align 4
  br label %46

41:                                               ; preds = %36
  %42 = load i32, ptr %9, align 4, !tbaa !9
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [210000 x i32], ptr @info, i64 0, i64 %43
  %45 = load i32, ptr %44, align 4, !tbaa !9
  store i32 %45, ptr %4, align 4
  store i32 1, ptr %12, align 4
  br label %46

46:                                               ; preds = %41, %40
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %47 = load i32, ptr %4, align 4
  ret i32 %47
}

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 = 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"

@len = external dso_local local_unnamed_addr global i32, align 4
@info = external dso_local local_unnamed_addr global [210000 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z4leftRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z5rightRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z10left_valueRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z5valueRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z3kthSt6vectorIiSaIiEES1_i(ptr noundef %0, ptr noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = load i32, ptr @len, align 4, !tbaa !5
  %5 = icmp sgt i32 %4, 1
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %13
  %.01321 = phi i32 [ %.1, %13 ], [ %2, %3 ]
  %.01420 = phi i32 [ %.115, %13 ], [ %4, %3 ]
  %.01619 = phi i32 [ %.117, %13 ], [ 1, %3 ]
  %6 = add nuw nsw i32 %.01420, %.01619
  %7 = lshr i32 %6, 1
  %8 = tail call noundef i32 @_Z10left_valueRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1)
  %.not = icmp sgt i32 %.01321, %8
  br i1 %.not, label %10, label %9

9:                                                ; preds = %.lr.ph
  tail call void @_Z4leftRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1)
  br label %13

10:                                               ; preds = %.lr.ph
  tail call void @_Z5rightRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1)
  %11 = add nuw nsw i32 %7, 1
  %12 = sub nsw i32 %.01321, %8
  br label %13

13:                                               ; preds = %10, %9
  %.117 = phi i32 [ %.01619, %9 ], [ %11, %10 ]
  %.115 = phi i32 [ %7, %9 ], [ %.01420, %10 ]
  %.1 = phi i32 [ %.01321, %9 ], [ %12, %10 ]
  %14 = icmp slt i32 %.117, %.115
  br i1 %14, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %13, %3
  %.014.lcssa = phi i32 [ %4, %3 ], [ %.115, %13 ]
  %.013.lcssa = phi i32 [ %2, %3 ], [ %.1, %13 ]
  %15 = tail call noundef i32 @_Z5valueRSt6vectorIiSaIiEES2_(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1)
  %16 = icmp sgt i32 %.013.lcssa, %15
  br i1 %16, label %21, label %17

17:                                               ; preds = %._crit_edge
  %18 = sext i32 %.014.lcssa to i64
  %19 = getelementptr inbounds [210000 x i32], ptr @info, i64 0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %._crit_edge, %17
  %.0 = phi i32 [ %20, %17 ], [ 1073741824, %._crit_edge ]
  ret i32 %.0
}

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" }

!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"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass