; LLVM IR from thalium/icebox :: third_party/virtualbox/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Universal (Ip4InterfaceDeliverPacket)

; 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._IP4_INTERFACE = type { i32, %struct._LIST_ENTRY, i64, i32, i32, i32, i32, i8, ptr, ptr, ptr, ptr, ptr, %struct._LIST_ENTRY, %struct._LIST_ENTRY, ptr, %struct.EFI_MAC_ADDRESS, %struct.EFI_MAC_ADDRESS, i32, %struct._LIST_ENTRY, i8 }
%struct.EFI_MAC_ADDRESS = type { [32 x i8] }
%struct._LIST_ENTRY = type { ptr, ptr }
%struct._IP4_PROTOCOL = type { i32, %struct._EFI_IP4_PROTOCOL, ptr, i64, ptr, %struct._LIST_ENTRY, %struct.NET_MAP, %struct.NET_MAP, %struct._LIST_ENTRY, %struct._LIST_ENTRY, %struct.EFI_LOCK, ptr, %struct._LIST_ENTRY, ptr, ptr, i32, ptr, i32, %struct.EFI_IP4_CONFIG_DATA }
%struct._EFI_IP4_PROTOCOL = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }
%struct.NET_MAP = type { %struct._LIST_ENTRY, %struct._LIST_ENTRY, i64 }
%struct.EFI_LOCK = type { i64, i64, i32 }
%struct.EFI_IP4_CONFIG_DATA = type { i8, i8, i8, i8, i8, i8, %struct.EFI_IPv4_ADDRESS, %struct.EFI_IPv4_ADDRESS, i8, i8, i8, i8, i32, i32 }
%struct.EFI_IPv4_ADDRESS = type { [4 x i8] }

; 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
declare dso_local i64 @Ip4InstanceDeliverPacket(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i64 @Ip4InterfaceDeliverPacket(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
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct._IP4_INTERFACE, ptr %7, i32 0, i32 19
  %9 = getelementptr inbounds %struct._LIST_ENTRY, ptr %8, i32 0, i32 0
  %10 = load ptr, ptr %9, align 8, !tbaa !9
  store ptr %10, ptr %6, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %23, %2
  %12 = load ptr, ptr %6, align 8, !tbaa !5
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct._IP4_INTERFACE, ptr %13, i32 0, i32 19
  %15 = icmp ne ptr %12, %14
  br i1 %15, label %16, label %27

16:                                               ; preds = %11
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = ptrtoint ptr %17 to i64
  %19 = sub i64 %18, ptrtoint (ptr getelementptr inbounds (%struct._IP4_PROTOCOL, ptr null, i32 0, i32 12) to i64)
  %20 = inttoptr i64 %19 to ptr
  store ptr %20, ptr %5, align 8, !tbaa !5
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = call i64 @Ip4InstanceDeliverPacket(ptr noundef %21)
  br label %23

23:                                               ; preds = %16
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct._LIST_ENTRY, ptr %24, i32 0, i32 0
  %26 = load ptr, ptr %25, align 8, !tbaa !15
  store ptr %26, ptr %6, align 8, !tbaa !5
  br label %11, !llvm.loop !16

27:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 0
}

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, !6, i64 208}
!10 = !{!"_IP4_INTERFACE", !11, i64 0, !12, i64 8, !13, i64 24, !11, i64 32, !11, i64 36, !11, i64 40, !11, i64 44, !7, i64 48, !6, i64 56, !6, i64 64, !6, i64 72, !6, i64 80, !6, i64 88, !12, i64 96, !12, i64 112, !6, i64 128, !14, i64 136, !14, i64 168, !11, i64 200, !12, i64 208, !7, i64 224}
!11 = !{!"int", !7, i64 0}
!12 = !{!"_LIST_ENTRY", !6, i64 0, !6, i64 8}
!13 = !{!"long long", !7, i64 0}
!14 = !{!"", !7, i64 0}
!15 = !{!12, !6, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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"

; Function Attrs: nounwind uwtable
declare dso_local i64 @Ip4InstanceDeliverPacket(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i64 @Ip4InterfaceDeliverPacket(ptr nocapture noundef readnone %0, ptr noundef readonly %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %1, i64 208
  %.06 = load ptr, ptr %3, align 8, !tbaa !5
  %.not7 = icmp eq ptr %.06, %3
  br i1 %.not7, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.08 = phi ptr [ %.0, %.lr.ph ], [ %.06, %2 ]
  %4 = ptrtoint ptr %.08 to i64
  %5 = add i64 %4, -256
  %6 = inttoptr i64 %5 to ptr
  %7 = tail call i64 @Ip4InstanceDeliverPacket(ptr noundef %6)
  %.0 = load ptr, ptr %.08, align 8, !tbaa !5
  %.not = icmp eq ptr %.0, %3
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !10

._crit_edge:                                      ; preds = %.lr.ph, %2
  ret i64 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" }

!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 = !{!"_LIST_ENTRY", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass