; LLVM IR from fmela/libdict :: src (skiplist)

; 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.dict_vtable = type { i8, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }
%struct.dict = type { ptr, ptr }

@dict_malloc_func = external global ptr, align 8
@dict_free_func = external global ptr, align 8
@skiplist_vtable = external hidden constant %struct.dict_vtable, align 8

; Function Attrs: nounwind uwtable
declare dso_local ptr @skiplist_new(ptr noundef, i32 noundef) #0

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

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

; Function Attrs: nounwind uwtable
define dso_local ptr @skiplist_dict_new(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %8 = load ptr, ptr @dict_malloc_func, align 8, !tbaa !5
  %9 = call ptr %8(i64 noundef 16)
  store ptr %9, ptr %6, align 8, !tbaa !5
  %10 = load ptr, ptr %6, align 8, !tbaa !5
  %11 = icmp ne ptr %10, null
  br i1 %11, label %12, label %25

12:                                               ; preds = %2
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = call ptr @skiplist_new(ptr noundef %13, i32 noundef %14)
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.dict, ptr %16, i32 0, i32 0
  store ptr %15, ptr %17, align 8, !tbaa !11
  %18 = icmp ne ptr %15, null
  br i1 %18, label %22, label %19

19:                                               ; preds = %12
  %20 = load ptr, ptr @dict_free_func, align 8, !tbaa !5
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  call void %20(ptr noundef %21)
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %27

22:                                               ; preds = %12
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.dict, ptr %23, i32 0, i32 1
  store ptr @skiplist_vtable, ptr %24, align 8, !tbaa !13
  br label %25

25:                                               ; preds = %22, %2
  %26 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %26, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %27

27:                                               ; preds = %25, %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %28 = load ptr, ptr %3, align 8
  ret ptr %28
}

attributes #0 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"", !6, i64 0, !6, i64 8}
!13 = !{!12, !6, i64 8}


; 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.dict_vtable = type { i8, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }

@dict_malloc_func = external local_unnamed_addr global ptr, align 8
@dict_free_func = external local_unnamed_addr global ptr, align 8
@skiplist_vtable = external hidden constant %struct.dict_vtable, align 8

; Function Attrs: nounwind uwtable
declare dso_local ptr @skiplist_new(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @skiplist_dict_new(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load ptr, ptr @dict_malloc_func, align 8, !tbaa !5
  %4 = tail call ptr %3(i64 noundef 16) #1
  %.not = icmp eq ptr %4, null
  br i1 %.not, label %11, label %5

5:                                                ; preds = %2
  %6 = tail call ptr @skiplist_new(ptr noundef %0, i32 noundef %1)
  store ptr %6, ptr %4, align 8, !tbaa !9
  %.not8 = icmp eq ptr %6, null
  br i1 %.not8, label %7, label %9

7:                                                ; preds = %5
  %8 = load ptr, ptr @dict_free_func, align 8, !tbaa !5
  tail call void %8(ptr noundef nonnull %4) #1
  br label %11

9:                                                ; preds = %5
  %10 = getelementptr inbounds i8, ptr %4, i64 8
  store ptr @skiplist_vtable, ptr %10, align 8, !tbaa !11
  br label %11

11:                                               ; preds = %2, %9, %7
  %.0 = phi ptr [ null, %7 ], [ %4, %9 ], [ null, %2 ]
  ret ptr %.0
}

attributes #0 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"", !6, i64 0, !6, i64 8}
!11 = !{!10, !6, i64 8}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass