; LLVM IR from thalium/icebox :: third_party/virtualbox/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Universal (Ip4FindGroup)

; 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.IGMP_SERVICE_DATA = type { i64, %struct._LIST_ENTRY }
%struct._LIST_ENTRY = type { ptr, ptr }
%struct.IGMP_GROUP = type { %struct._LIST_ENTRY, i64, i32, i64, i8, %struct.EFI_MAC_ADDRESS }
%struct.EFI_MAC_ADDRESS = type { [32 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
define dso_local ptr @Ip4FindGroup(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = 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
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.IGMP_SERVICE_DATA, ptr %9, i32 0, i32 1
  %11 = getelementptr inbounds %struct._LIST_ENTRY, ptr %10, i32 0, i32 0
  %12 = load ptr, ptr %11, align 8, !tbaa !11
  store ptr %12, ptr %6, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %31, %2
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.IGMP_SERVICE_DATA, ptr %15, i32 0, i32 1
  %17 = icmp ne ptr %14, %16
  br i1 %17, label %18, label %35

18:                                               ; preds = %13
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = ptrtoint ptr %19 to i64
  %21 = sub i64 %20, 0
  %22 = inttoptr i64 %21 to ptr
  store ptr %22, ptr %7, align 8, !tbaa !5
  %23 = load ptr, ptr %7, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.IGMP_GROUP, ptr %23, i32 0, i32 2
  %25 = load i32, ptr %24, align 8, !tbaa !15
  %26 = load i32, ptr %5, align 4, !tbaa !9
  %27 = icmp eq i32 %25, %26
  br i1 %27, label %28, label %30

28:                                               ; preds = %18
  %29 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %29, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %36

30:                                               ; preds = %18
  br label %31

31:                                               ; preds = %30
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct._LIST_ENTRY, ptr %32, i32 0, i32 0
  %34 = load ptr, ptr %33, align 8, !tbaa !18
  store ptr %34, ptr %6, align 8, !tbaa !5
  br label %13, !llvm.loop !19

35:                                               ; preds = %13
  store ptr null, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %36

36:                                               ; preds = %35, %28
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %37 = load ptr, ptr %3, align 8
  ret ptr %37
}

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 8}
!12 = !{!"", !13, i64 0, !14, i64 8}
!13 = !{!"long long", !7, i64 0}
!14 = !{!"_LIST_ENTRY", !6, i64 0, !6, i64 8}
!15 = !{!16, !10, i64 24}
!16 = !{!"", !14, i64 0, !13, i64 16, !10, i64 24, !13, i64 32, !7, i64 40, !17, i64 41}
!17 = !{!"", !7, i64 0}
!18 = !{!14, !6, i64 0}
!19 = distinct !{!19, !20}
!20 = !{!"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: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local ptr @Ip4FindGroup(ptr noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  br label %4

4:                                                ; preds = %5, %2
  %.08.in = phi ptr [ %3, %2 ], [ %.08, %5 ]
  %.08 = load ptr, ptr %.08.in, align 8, !tbaa !5
  %.not = icmp eq ptr %.08, %3
  br i1 %.not, label %9, label %5

5:                                                ; preds = %4
  %6 = getelementptr inbounds i8, ptr %.08, i64 24
  %7 = load i32, ptr %6, align 8, !tbaa !10
  %8 = icmp eq i32 %7, %1
  br i1 %8, label %9, label %4, !llvm.loop !15

9:                                                ; preds = %4, %5
  %.0 = phi ptr [ %.08, %5 ], [ null, %4 ]
  ret ptr %.0
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) 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 = !{!11, !13, i64 24}
!11 = !{!"", !6, i64 0, !12, i64 16, !13, i64 24, !12, i64 32, !8, i64 40, !14, i64 41}
!12 = !{!"long long", !8, i64 0}
!13 = !{!"int", !8, i64 0}
!14 = !{!"", !8, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


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