; LLVM IR from thalium/icebox :: third_party/virtualbox/src/VBox/Devices/EFI/Firmware/NetworkPkg/Ip6Dxe (Ip6IsValidLinkAddress)

; 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._IP6_SERVICE = type { i32, %struct._EFI_SERVICE_BINDING_PROTOCOL, i64, i64, %struct._LIST_ENTRY, %struct._LIST_ENTRY, ptr, ptr, %struct.IP6_LINK_RX_TOKEN, %struct.IP6_ASSEMBLE_TABLE, %struct.IP6_MLD_SERVICE_DATA, %struct.EFI_IPv6_ADDRESS, i8, i8, i8, i8, i8, i32, i32, i32, i32, %struct._LIST_ENTRY, %struct._LIST_ENTRY, %struct._LIST_ENTRY, %struct._LIST_ENTRY, i32, i8, ptr, i8, i8, i32, ptr, ptr, ptr, ptr, %struct.EFI_MANAGED_NETWORK_CONFIG_DATA, %struct.EFI_SIMPLE_NETWORK_MODE, ptr, ptr, %struct._IP6_CONFIG_INSTANCE, ptr, i32, i32 }
%struct._EFI_SERVICE_BINDING_PROTOCOL = type { ptr, ptr }
%struct.IP6_LINK_RX_TOKEN = type { i32, ptr, ptr, %struct.EFI_MANAGED_NETWORK_COMPLETION_TOKEN }
%struct.EFI_MANAGED_NETWORK_COMPLETION_TOKEN = type { ptr, i64, %union.anon }
%union.anon = type { ptr }
%struct.IP6_ASSEMBLE_TABLE = type { [127 x %struct._LIST_ENTRY] }
%struct.IP6_MLD_SERVICE_DATA = type { i64, %struct._LIST_ENTRY }
%struct.EFI_IPv6_ADDRESS = type { [16 x i8] }
%struct._LIST_ENTRY = type { ptr, ptr }
%struct.EFI_MANAGED_NETWORK_CONFIG_DATA = type { i32, i32, i16, i8, i8, i8, i8, i8, i8, i8 }
%struct.EFI_SIMPLE_NETWORK_MODE = type { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, [16 x %struct.EFI_MAC_ADDRESS], %struct.EFI_MAC_ADDRESS, %struct.EFI_MAC_ADDRESS, %struct.EFI_MAC_ADDRESS, i8, i8, i8, i8, i8 }
%struct.EFI_MAC_ADDRESS = type { [32 x i8] }
%struct._IP6_CONFIG_INSTANCE = type { i32, i8, %struct._LIST_ENTRY, i16, %struct.EFI_IP6_CONFIG_INTERFACE_INFO, %struct.EFI_IP6_CONFIG_INTERFACE_ID, i32, %struct.EFI_IP6_CONFIG_DUP_ADDR_DETECT_TRANSMITS, [7 x %struct.IP6_CONFIG_DATA_ITEM], %struct.NET_MAP, %struct.NET_MAP, %struct._EFI_IP6_CONFIG_PROTOCOL, ptr, ptr, ptr, ptr, i8, i32, ptr, i32, ptr, i32, %struct._IP6_FORM_CALLBACK_INFO, %struct.IP6_CONFIG_NVDATA }
%struct.EFI_IP6_CONFIG_INTERFACE_INFO = type { [32 x i16], i8, i32, %struct.EFI_MAC_ADDRESS, i32, ptr, i32, ptr }
%struct.EFI_IP6_CONFIG_INTERFACE_ID = type { [8 x i8] }
%struct.EFI_IP6_CONFIG_DUP_ADDR_DETECT_TRANSMITS = type { i32 }
%struct.IP6_CONFIG_DATA_ITEM = type { ptr, ptr, i64, i8, %struct.NET_MAP, %union.IP6_CONFIG_DATA, i64 }
%union.IP6_CONFIG_DATA = type { ptr }
%struct.NET_MAP = type { %struct._LIST_ENTRY, %struct._LIST_ENTRY, i64 }
%struct._EFI_IP6_CONFIG_PROTOCOL = type { ptr, ptr, ptr, ptr }
%struct._IP6_FORM_CALLBACK_INFO = type { i32, ptr, %struct._EFI_HII_CONFIG_ACCESS_PROTOCOL, ptr, ptr }
%struct._EFI_HII_CONFIG_ACCESS_PROTOCOL = type { ptr, ptr, ptr }
%struct.IP6_CONFIG_NVDATA = type { i32, %struct.EFI_IP6_CONFIG_DUP_ADDR_DETECT_TRANSMITS, %struct.EFI_IP6_CONFIG_INTERFACE_ID, %struct._LIST_ENTRY, i32, %struct._LIST_ENTRY, i32, %struct._LIST_ENTRY, 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 zeroext i8 @Ip6IsValidLinkAddress(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i8, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %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 4, ptr %6) #2
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct._IP6_SERVICE, ptr %8, i32 0, i32 36
  %10 = getelementptr inbounds %struct.EFI_SIMPLE_NETWORK_MODE, ptr %9, i32 0, i32 1
  %11 = load i32, ptr %10, align 4, !tbaa !9
  store i32 %11, ptr %6, align 4, !tbaa !30
  br label %12

12:                                               ; preds = %27, %2
  %13 = load i32, ptr %6, align 4, !tbaa !30
  %14 = zext i32 %13 to i64
  %15 = icmp ult i64 %14, 32
  br i1 %15, label %16, label %30

16:                                               ; preds = %12
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.EFI_MAC_ADDRESS, ptr %17, i32 0, i32 0
  %19 = load i32, ptr %6, align 4, !tbaa !30
  %20 = zext i32 %19 to i64
  %21 = getelementptr inbounds [32 x i8], ptr %18, i64 0, i64 %20
  %22 = load i8, ptr %21, align 1, !tbaa !31
  %23 = zext i8 %22 to i32
  %24 = icmp ne i32 %23, 0
  br i1 %24, label %25, label %26

25:                                               ; preds = %16
  store i8 0, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %31

26:                                               ; preds = %16
  br label %27

27:                                               ; preds = %26
  %28 = load i32, ptr %6, align 4, !tbaa !30
  %29 = add i32 %28, 1
  store i32 %29, ptr %6, align 4, !tbaa !30
  br label %12, !llvm.loop !32

30:                                               ; preds = %12
  store i8 1, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %31

31:                                               ; preds = %30, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %32 = load i8, ptr %3, align 1
  ret i8 %32
}

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, !11, i64 2376}
!10 = !{!"_IP6_SERVICE", !11, i64 0, !12, i64 8, !13, i64 24, !13, i64 32, !14, i64 40, !14, i64 56, !6, i64 72, !6, i64 80, !15, i64 88, !17, i64 136, !18, i64 2168, !17, i64 2192, !7, i64 2208, !7, i64 2209, !7, i64 2210, !7, i64 2211, !7, i64 2212, !11, i64 2216, !11, i64 2220, !11, i64 2224, !11, i64 2228, !14, i64 2232, !14, i64 2248, !14, i64 2264, !14, i64 2280, !11, i64 2296, !7, i64 2300, !6, i64 2304, !7, i64 2312, !7, i64 2313, !11, i64 2316, !6, i64 2320, !6, i64 2328, !6, i64 2336, !6, i64 2344, !19, i64 2352, !21, i64 2372, !6, i64 3032, !6, i64 3040, !22, i64 3048, !6, i64 4176, !11, i64 4184, !11, i64 4188}
!11 = !{!"int", !7, i64 0}
!12 = !{!"_EFI_SERVICE_BINDING_PROTOCOL", !6, i64 0, !6, i64 8}
!13 = !{!"long long", !7, i64 0}
!14 = !{!"_LIST_ENTRY", !6, i64 0, !6, i64 8}
!15 = !{!"", !11, i64 0, !6, i64 8, !6, i64 16, !16, i64 24}
!16 = !{!"", !6, i64 0, !13, i64 8, !7, i64 16}
!17 = !{!"", !7, i64 0}
!18 = !{!"", !13, i64 0, !14, i64 8}
!19 = !{!"", !11, i64 0, !11, i64 4, !20, i64 8, !7, i64 10, !7, i64 11, !7, i64 12, !7, i64 13, !7, i64 14, !7, i64 15, !7, i64 16}
!20 = !{!"short", !7, i64 0}
!21 = !{!"", !11, i64 0, !11, i64 4, !11, i64 8, !11, i64 12, !11, i64 16, !11, i64 20, !11, i64 24, !11, i64 28, !11, i64 32, !11, i64 36, !7, i64 40, !17, i64 552, !17, i64 584, !17, i64 616, !7, i64 648, !7, i64 649, !7, i64 650, !7, i64 651, !7, i64 652}
!22 = !{!"_IP6_CONFIG_INSTANCE", !11, i64 0, !7, i64 4, !14, i64 8, !20, i64 24, !23, i64 32, !17, i64 168, !11, i64 176, !24, i64 180, !7, i64 184, !25, i64 800, !25, i64 840, !26, i64 880, !6, i64 912, !6, i64 920, !6, i64 928, !6, i64 936, !7, i64 944, !11, i64 948, !6, i64 952, !11, i64 960, !6, i64 968, !11, i64 976, !27, i64 984, !29, i64 1040}
!23 = !{!"", !7, i64 0, !7, i64 64, !11, i64 68, !17, i64 72, !11, i64 104, !6, i64 112, !11, i64 120, !6, i64 128}
!24 = !{!"", !11, i64 0}
!25 = !{!"", !14, i64 0, !14, i64 16, !13, i64 32}
!26 = !{!"_EFI_IP6_CONFIG_PROTOCOL", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24}
!27 = !{!"_IP6_FORM_CALLBACK_INFO", !11, i64 0, !6, i64 8, !28, i64 16, !6, i64 40, !6, i64 48}
!28 = !{!"_EFI_HII_CONFIG_ACCESS_PROTOCOL", !6, i64 0, !6, i64 8, !6, i64 16}
!29 = !{!"", !11, i64 0, !24, i64 4, !17, i64 8, !14, i64 16, !11, i64 32, !14, i64 40, !11, i64 56, !14, i64 64, !11, i64 80}
!30 = !{!11, !11, i64 0}
!31 = !{!7, !7, i64 0}
!32 = distinct !{!32, !33}
!33 = !{!"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(argmem: read) uwtable
define dso_local zeroext range(i8 0, 2) i8 @Ip6IsValidLinkAddress(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 2376
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = icmp ult i32 %4, 32
  br i1 %5, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %6 = zext nneg i32 %4 to i64
  br label %.lr.ph

7:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %8 = and i64 %indvars.iv.next, 4294967295
  %exitcond.not = icmp eq i64 %8, 32
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !29

.lr.ph:                                           ; preds = %.lr.ph.preheader, %7
  %indvars.iv = phi i64 [ %6, %.lr.ph.preheader ], [ %indvars.iv.next, %7 ]
  %9 = getelementptr inbounds [32 x i8], ptr %1, i64 0, i64 %indvars.iv
  %10 = load i8, ptr %9, align 1, !tbaa !31
  %.not = icmp eq i8 %10, 0
  br i1 %.not, label %7, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %7, %2
  %.05 = phi i8 [ 1, %2 ], [ 1, %7 ], [ 0, %.lr.ph ]
  ret i8 %.05
}

attributes #0 = { nofree norecurse nosync nounwind 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, !7, i64 2376}
!6 = !{!"_IP6_SERVICE", !7, i64 0, !10, i64 8, !12, i64 24, !12, i64 32, !13, i64 40, !13, i64 56, !11, i64 72, !11, i64 80, !14, i64 88, !16, i64 136, !17, i64 2168, !16, i64 2192, !8, i64 2208, !8, i64 2209, !8, i64 2210, !8, i64 2211, !8, i64 2212, !7, i64 2216, !7, i64 2220, !7, i64 2224, !7, i64 2228, !13, i64 2232, !13, i64 2248, !13, i64 2264, !13, i64 2280, !7, i64 2296, !8, i64 2300, !11, i64 2304, !8, i64 2312, !8, i64 2313, !7, i64 2316, !11, i64 2320, !11, i64 2328, !11, i64 2336, !11, i64 2344, !18, i64 2352, !20, i64 2372, !11, i64 3032, !11, i64 3040, !21, i64 3048, !11, i64 4176, !7, i64 4184, !7, i64 4188}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"_EFI_SERVICE_BINDING_PROTOCOL", !11, i64 0, !11, i64 8}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!"long long", !8, i64 0}
!13 = !{!"_LIST_ENTRY", !11, i64 0, !11, i64 8}
!14 = !{!"", !7, i64 0, !11, i64 8, !11, i64 16, !15, i64 24}
!15 = !{!"", !11, i64 0, !12, i64 8, !8, i64 16}
!16 = !{!"", !8, i64 0}
!17 = !{!"", !12, i64 0, !13, i64 8}
!18 = !{!"", !7, i64 0, !7, i64 4, !19, i64 8, !8, i64 10, !8, i64 11, !8, i64 12, !8, i64 13, !8, i64 14, !8, i64 15, !8, i64 16}
!19 = !{!"short", !8, i64 0}
!20 = !{!"", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !7, i64 16, !7, i64 20, !7, i64 24, !7, i64 28, !7, i64 32, !7, i64 36, !8, i64 40, !16, i64 552, !16, i64 584, !16, i64 616, !8, i64 648, !8, i64 649, !8, i64 650, !8, i64 651, !8, i64 652}
!21 = !{!"_IP6_CONFIG_INSTANCE", !7, i64 0, !8, i64 4, !13, i64 8, !19, i64 24, !22, i64 32, !16, i64 168, !7, i64 176, !23, i64 180, !8, i64 184, !24, i64 800, !24, i64 840, !25, i64 880, !11, i64 912, !11, i64 920, !11, i64 928, !11, i64 936, !8, i64 944, !7, i64 948, !11, i64 952, !7, i64 960, !11, i64 968, !7, i64 976, !26, i64 984, !28, i64 1040}
!22 = !{!"", !8, i64 0, !8, i64 64, !7, i64 68, !16, i64 72, !7, i64 104, !11, i64 112, !7, i64 120, !11, i64 128}
!23 = !{!"", !7, i64 0}
!24 = !{!"", !13, i64 0, !13, i64 16, !12, i64 32}
!25 = !{!"_EFI_IP6_CONFIG_PROTOCOL", !11, i64 0, !11, i64 8, !11, i64 16, !11, i64 24}
!26 = !{!"_IP6_FORM_CALLBACK_INFO", !7, i64 0, !11, i64 8, !27, i64 16, !11, i64 40, !11, i64 48}
!27 = !{!"_EFI_HII_CONFIG_ACCESS_PROTOCOL", !11, i64 0, !11, i64 8, !11, i64 16}
!28 = !{!"", !7, i64 0, !23, i64 4, !16, i64 8, !13, i64 16, !7, i64 32, !13, i64 40, !7, i64 56, !13, i64 64, !7, i64 80}
!29 = distinct !{!29, !30}
!30 = !{!"llvm.loop.mustprogress"}
!31 = !{!8, !8, i64 0}


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