; LLVM IR from thalium/icebox :: third_party/virtualbox/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Universal (Udp4LeaveGroup)

; 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.NET_MAP_ITEM = type { %struct._LIST_ENTRY, ptr, ptr }
%struct._LIST_ENTRY = type { ptr, ptr }

; 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

declare i64 @CompareMem(ptr noundef, ptr noundef, i64 noundef) #1

declare ptr @NetMapRemoveItem(ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i64 @Udp4LeaveGroup(ptr noundef %0, ptr noundef %1, ptr noundef %2) #2 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %10 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %10, ptr %8, align 8, !tbaa !5
  %11 = load ptr, ptr %8, align 8, !tbaa !5
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %20

13:                                               ; preds = %3
  %14 = load ptr, ptr %8, align 8, !tbaa !5
  %15 = load ptr, ptr %6, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.NET_MAP_ITEM, ptr %15, i32 0, i32 1
  %17 = call i64 @CompareMem(ptr noundef %14, ptr noundef %16, i64 noundef 4)
  %18 = icmp eq i64 %17, 0
  br i1 %18, label %20, label %19

19:                                               ; preds = %13
  store i64 0, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %28

20:                                               ; preds = %13, %3
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = call ptr @NetMapRemoveItem(ptr noundef %21, ptr noundef %22, ptr noundef null)
  %24 = load ptr, ptr %8, align 8, !tbaa !5
  %25 = icmp ne ptr %24, null
  br i1 %25, label %26, label %27

26:                                               ; preds = %20
  store i64 -9223372036854775787, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %28

27:                                               ; preds = %20
  store i64 0, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %28

28:                                               ; preds = %27, %26, %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %29 = load i64, ptr %4, align 8
  ret i64 %29
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 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"}


; 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"

declare i64 @CompareMem(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #0

declare ptr @NetMapRemoveItem(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local range(i64 -9223372036854775787, 1) i64 @Udp4LeaveGroup(ptr noundef %0, ptr noundef %1, ptr noundef %2) local_unnamed_addr #1 {
  %.not = icmp eq ptr %2, null
  br i1 %.not, label %8, label %4

4:                                                ; preds = %3
  %5 = getelementptr inbounds i8, ptr %1, i64 16
  %6 = tail call i64 @CompareMem(ptr noundef nonnull %2, ptr noundef nonnull %5, i64 noundef 4) #2
  %7 = icmp eq i64 %6, 0
  br i1 %7, label %8, label %10

8:                                                ; preds = %4, %3
  %. = phi i64 [ -9223372036854775787, %4 ], [ 0, %3 ]
  %9 = tail call ptr @NetMapRemoveItem(ptr noundef %0, ptr noundef %1, ptr noundef null) #2
  br label %10

10:                                               ; preds = %8, %4
  %.0 = phi i64 [ 0, %4 ], [ %., %8 ]
  ret i64 %.0
}

attributes #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 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)"}


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