; LLVM IR from sunkafei/xcpc-algorithm-templates :: 算法/数据结构/TopTree.ll (Z6accessP4node)

; 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"

%struct.node = type <{ [4 x ptr], ptr, %struct.info, %struct.info, %struct.info, %struct.info, %struct.mark, %struct.mark, i8, i8, [6 x i8] }>
%struct.info = type { i32, i32, i32, i32 }
%struct.mark = type { i32, i32 }

@null = external dso_local global ptr, align 8

; 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 uwtable
declare dso_local void @_Z5splayP4nodei(ptr noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z7addvirtP4nodeS0_(ptr noundef, ptr noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN4node3setEPS_i(ptr noundef nonnull align 8 dereferenceable(122), ptr noundef, i32 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z7delvirtP4node(ptr noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6accessP4node(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  %4 = load ptr, ptr @null, align 8, !tbaa !5
  store ptr %4, ptr %3, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %33, %1
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = load ptr, ptr @null, align 8, !tbaa !5
  %8 = icmp ne ptr %6, %7
  br i1 %8, label %9, label %34

9:                                                ; preds = %5
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_Z5splayP4nodei(ptr noundef %10, i32 noundef 0)
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.node, ptr %11, i32 0, i32 0
  %13 = getelementptr inbounds [4 x ptr], ptr %12, i64 0, i64 1
  %14 = load ptr, ptr %13, align 8, !tbaa !5
  %15 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_Z7addvirtP4nodeS0_(ptr noundef %14, ptr noundef %15)
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_Z7delvirtP4node(ptr noundef %16)
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_ZN4node3setEPS_i(ptr noundef nonnull align 8 dereferenceable(122) %17, ptr noundef %18, i32 noundef 1)
  %19 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %19, ptr %3, align 8, !tbaa !5
  %20 = load ptr, ptr %2, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.node, ptr %20, i32 0, i32 1
  %22 = load ptr, ptr %21, align 8, !tbaa !9
  store ptr %22, ptr %2, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %29, %9
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.node, ptr %24, i32 0, i32 9
  %26 = load i8, ptr %25, align 1, !tbaa !15, !range !16, !noundef !17
  %27 = trunc i8 %26 to i1
  br i1 %27, label %28, label %33

28:                                               ; preds = %23
  br label %29

29:                                               ; preds = %28
  %30 = load ptr, ptr %2, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.node, ptr %30, i32 0, i32 1
  %32 = load ptr, ptr %31, align 8, !tbaa !9
  store ptr %32, ptr %2, align 8, !tbaa !5
  br label %23, !llvm.loop !18

33:                                               ; preds = %23
  br label %5, !llvm.loop !20

34:                                               ; preds = %5
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !6, i64 32}
!10 = !{!"_ZTS4node", !7, i64 0, !6, i64 32, !11, i64 40, !11, i64 56, !11, i64 72, !11, i64 88, !13, i64 104, !13, i64 112, !14, i64 120, !14, i64 121}
!11 = !{!"_ZTS4info", !12, i64 0, !12, i64 4, !12, i64 8, !12, i64 12}
!12 = !{!"int", !7, i64 0}
!13 = !{!"_ZTS4mark", !12, i64 0, !12, i64 4}
!14 = !{!"bool", !7, i64 0}
!15 = !{!10, !14, i64 121}
!16 = !{i8 0, i8 2}
!17 = !{}
!18 = distinct !{!18, !19}
!19 = !{!"llvm.loop.mustprogress"}
!20 = distinct !{!20, !19}


; 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"

@null = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5splayP4nodei(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z7addvirtP4nodeS0_(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN4node3setEPS_i(ptr noundef nonnull align 8 dereferenceable(122), ptr noundef, i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z7delvirtP4node(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6accessP4node(ptr noundef %0) local_unnamed_addr #0 {
  %2 = load ptr, ptr @null, align 8, !tbaa !5
  %.not12 = icmp eq ptr %2, %0
  br i1 %.not12, label %._crit_edge, label %.lr.ph

.loopexit:                                        ; preds = %6
  %3 = load ptr, ptr @null, align 8, !tbaa !5
  %.not = icmp eq ptr %.1, %3
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

.lr.ph:                                           ; preds = %1, %.loopexit
  %.014 = phi ptr [ %.01113, %.loopexit ], [ %2, %1 ]
  %.01113 = phi ptr [ %.1, %.loopexit ], [ %0, %1 ]
  tail call void @_Z5splayP4nodei(ptr noundef %.01113, i32 noundef 0)
  %4 = getelementptr inbounds i8, ptr %.01113, i64 8
  %5 = load ptr, ptr %4, align 8, !tbaa !5
  tail call void @_Z7addvirtP4nodeS0_(ptr noundef %5, ptr noundef %.01113)
  tail call void @_Z7delvirtP4node(ptr noundef %.014)
  tail call void @_ZN4node3setEPS_i(ptr noundef nonnull align 8 dereferenceable(122) %.01113, ptr noundef %.014, i32 noundef 1)
  br label %6

6:                                                ; preds = %6, %.lr.ph
  %.011.pn = phi ptr [ %.01113, %.lr.ph ], [ %.1, %6 ]
  %.1.in = getelementptr inbounds i8, ptr %.011.pn, i64 32
  %.1 = load ptr, ptr %.1.in, align 8, !tbaa !11
  %7 = getelementptr inbounds i8, ptr %.1, i64 121
  %8 = load i8, ptr %7, align 1, !tbaa !17, !range !18, !noundef !19
  %9 = trunc nuw i8 %8 to i1
  br i1 %9, label %6, label %.loopexit, !llvm.loop !20

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

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" }

!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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !6, i64 32}
!12 = !{!"_ZTS4node", !7, i64 0, !6, i64 32, !13, i64 40, !13, i64 56, !13, i64 72, !13, i64 88, !15, i64 104, !15, i64 112, !16, i64 120, !16, i64 121}
!13 = !{!"_ZTS4info", !14, i64 0, !14, i64 4, !14, i64 8, !14, i64 12}
!14 = !{!"int", !7, i64 0}
!15 = !{!"_ZTS4mark", !14, i64 0, !14, i64 4}
!16 = !{!"bool", !7, i64 0}
!17 = !{!12, !16, i64 121}
!18 = !{i8 0, i8 2}
!19 = !{}
!20 = distinct !{!20, !10}


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