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

; 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_tcp_conn_t = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, i32 }

; 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_tcp_conn_head(ptr noundef nonnull %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store ptr null, ptr %5, align 8, !tbaa !5
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = icmp eq i32 %6, 1
  br i1 %7, label %8, label %12

8:                                                ; preds = %2
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.mln_tcp_conn_t, ptr %9, i32 0, i32 3
  %11 = load ptr, ptr %10, align 8, !tbaa !11
  store ptr %11, ptr %5, align 8, !tbaa !5
  br label %29

12:                                               ; preds = %2
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = icmp eq i32 %13, 2
  br i1 %14, label %15, label %19

15:                                               ; preds = %12
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.mln_tcp_conn_t, ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  store ptr %18, ptr %5, align 8, !tbaa !5
  br label %28

19:                                               ; preds = %12
  %20 = load i32, ptr %4, align 4, !tbaa !9
  %21 = icmp eq i32 %20, 3
  br i1 %21, label %22, label %26

22:                                               ; preds = %19
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.mln_tcp_conn_t, ptr %23, i32 0, i32 5
  %25 = load ptr, ptr %24, align 8, !tbaa !14
  store ptr %25, ptr %5, align 8, !tbaa !5
  br label %27

26:                                               ; preds = %19
  br label %27

27:                                               ; preds = %26, %22
  br label %28

28:                                               ; preds = %27, %15
  br label %29

29:                                               ; preds = %28, %8
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret ptr %30
}

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 = { 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 24}
!12 = !{!"", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !10, i64 56}
!13 = !{!12, !6, i64 8}
!14 = !{!12, !6, i64 40}


; 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"

@switch.table.mln_tcp_conn_head = private unnamed_addr constant [3 x i64] [i64 24, i64 8, i64 40], align 8

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local ptr @mln_tcp_conn_head(ptr nocapture noundef nonnull readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %switch.tableidx = add i32 %1, -1
  %3 = icmp ult i32 %switch.tableidx, 3
  br i1 %3, label %switch.lookup, label %7

switch.lookup:                                    ; preds = %2
  %4 = zext nneg i32 %switch.tableidx to i64
  %switch.gep = getelementptr inbounds [3 x i64], ptr @switch.table.mln_tcp_conn_head, i64 0, i64 %4
  %switch.load = load i64, ptr %switch.gep, align 8
  %5 = getelementptr inbounds i8, ptr %0, i64 %switch.load
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %2, %switch.lookup
  %.0 = phi ptr [ null, %2 ], [ %6, %switch.lookup ]
  ret ptr %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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/C++ TBAA"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass