; LLVM IR from Water-Melon/Melon :: src (mln_conf)

; 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.mln_conf_hook_s = type { ptr, ptr, ptr, ptr }

@g_conf_hook_head = external hidden global ptr, align 8
@g_conf_hook_tail = external hidden 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: nounwind uwtable
define dso_local ptr @mln_conf_hook_set(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %8 = call ptr @mln_conf_hook_init()
  store ptr %8, ptr %6, align 8, !tbaa !5
  %9 = load ptr, ptr %6, align 8, !tbaa !5
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %12

11:                                               ; preds = %2
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %21

12:                                               ; preds = %2
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.mln_conf_hook_s, ptr %14, i32 0, i32 0
  store ptr %13, ptr %15, align 8, !tbaa !9
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.mln_conf_hook_s, ptr %17, i32 0, i32 1
  store ptr %16, ptr %18, align 8, !tbaa !11
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  call void @conf_hook_chain_add(ptr noundef @g_conf_hook_head, ptr noundef @g_conf_hook_tail, ptr noundef %19)
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %20, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %21

21:                                               ; preds = %12, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %22 = load ptr, ptr %3, align 8
  ret ptr %22
}

; Function Attrs: nounwind uwtable
declare hidden ptr @mln_conf_hook_init() #1

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @conf_hook_chain_add(ptr noundef, ptr noundef, ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { inlinehint 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/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"mln_conf_hook_s", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24}
!11 = !{!10, !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"

@g_conf_hook_head = external hidden global ptr, align 8
@g_conf_hook_tail = external hidden global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local ptr @mln_conf_hook_set(ptr noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = tail call ptr @mln_conf_hook_init()
  %4 = icmp eq ptr %3, null
  br i1 %4, label %7, label %5

5:                                                ; preds = %2
  store ptr %0, ptr %3, align 8, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %1, ptr %6, align 8, !tbaa !10
  tail call void @conf_hook_chain_add(ptr noundef nonnull @g_conf_hook_head, ptr noundef nonnull @g_conf_hook_tail, ptr noundef nonnull %3)
  br label %7

7:                                                ; preds = %2, %5
  ret ptr %3
}

; Function Attrs: nounwind uwtable
declare hidden ptr @mln_conf_hook_init() local_unnamed_addr #0

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @conf_hook_chain_add(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

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 = { inlinehint 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, !7, i64 0}
!6 = !{!"mln_conf_hook_s", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 8}


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