; LLVM IR from sunkafei/xcpc-algorithm-templates :: 算法/数据结构/可持久化Treap.ll (ZN12shared_treap4initEv)

; 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.shared_treap::node" = type <{ %"struct.shared_treap::pointer", %"struct.shared_treap::pointer", i32, i32, i32, [4 x i8] }>
%"struct.shared_treap::pointer" = type { ptr }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<shared_treap::node *, std::allocator<shared_treap::node *>>::_Vector_impl" }
%"struct.std::_Vector_base<shared_treap::node *, std::allocator<shared_treap::node *>>::_Vector_impl" = type { %"struct.std::_Vector_base<shared_treap::node *, std::allocator<shared_treap::node *>>::_Vector_impl_data" }
%"struct.std::_Vector_base<shared_treap::node *, std::allocator<shared_treap::node *>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@_ZN12shared_treap5nodesE = external dso_local global [510000 x %"struct.shared_treap::node"], align 16
@_ZN12shared_treap4poolE = external dso_local global %"class.std::vector", 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
define dso_local void @_ZN12shared_treap4initEv() #1 {
  %1 = alloca i32, align 4
  %2 = alloca ptr, align 8
  call void @_ZNSt6vectorIPN12shared_treap4nodeESaIS2_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24) @_ZN12shared_treap4poolE) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  store i32 1, ptr %1, align 4, !tbaa !5
  br label %3

3:                                                ; preds = %11, %0
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = icmp slt i32 %4, 510000
  br i1 %5, label %7, label %6

6:                                                ; preds = %3
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  br label %14

7:                                                ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %8 = load i32, ptr %1, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds %"struct.shared_treap::node", ptr @_ZN12shared_treap5nodesE, i64 %9
  store ptr %10, ptr %2, align 8, !tbaa !9
  call void @_ZNSt6vectorIPN12shared_treap4nodeESaIS2_EE9push_backEOS2_(ptr noundef nonnull align 8 dereferenceable(24) @_ZN12shared_treap4poolE, ptr noundef nonnull align 8 dereferenceable(8) %2)
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  br label %11

11:                                               ; preds = %7
  %12 = load i32, ptr %1, align 4, !tbaa !5
  %13 = add nsw i32 %12, 1
  store i32 %13, ptr %1, align 4, !tbaa !5
  br label %3, !llvm.loop !11

14:                                               ; preds = %6
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIPN12shared_treap4nodeESaIS2_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIPN12shared_treap4nodeESaIS2_EE9push_backEOS2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

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 = { 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 = { 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 = !{!"any pointer", !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"

%"struct.shared_treap::node" = type <{ %"struct.shared_treap::pointer", %"struct.shared_treap::pointer", i32, i32, i32, [4 x i8] }>
%"struct.shared_treap::pointer" = type { ptr }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<shared_treap::node *, std::allocator<shared_treap::node *>>::_Vector_impl" }
%"struct.std::_Vector_base<shared_treap::node *, std::allocator<shared_treap::node *>>::_Vector_impl" = type { %"struct.std::_Vector_base<shared_treap::node *, std::allocator<shared_treap::node *>>::_Vector_impl_data" }
%"struct.std::_Vector_base<shared_treap::node *, std::allocator<shared_treap::node *>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@_ZN12shared_treap5nodesE = external dso_local global [510000 x %"struct.shared_treap::node"], align 16
@_ZN12shared_treap4poolE = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN12shared_treap4initEv() local_unnamed_addr #1 {
  %1 = alloca ptr, align 8
  tail call void @_ZNSt6vectorIPN12shared_treap4nodeESaIS2_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24) @_ZN12shared_treap4poolE) #3
  br label %3

2:                                                ; preds = %3
  ret void

3:                                                ; preds = %0, %3
  %indvars.iv = phi i64 [ 1, %0 ], [ %indvars.iv.next, %3 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %4 = getelementptr inbounds %"struct.shared_treap::node", ptr @_ZN12shared_treap5nodesE, i64 %indvars.iv
  store ptr %4, ptr %1, align 8, !tbaa !5
  call void @_ZNSt6vectorIPN12shared_treap4nodeESaIS2_EE9push_backEOS2_(ptr noundef nonnull align 8 dereferenceable(24) @_ZN12shared_treap4poolE, ptr noundef nonnull align 8 dereferenceable(8) %1)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 510000
  br i1 %exitcond.not, label %2, label %3, !llvm.loop !9
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIPN12shared_treap4nodeESaIS2_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIPN12shared_treap4nodeESaIS2_EE9push_backEOS2_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress 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 = { 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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,SimplifyCFGPass,TailCallElimPass