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

; 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._TCP_CB = type { %struct._LIST_ENTRY, ptr, ptr, %struct._TCP_PEER, %struct._TCP_PEER, %struct._LIST_ENTRY, %struct._LIST_ENTRY, i32, i32, i8, i8, i16, i32, i32, i32, i32, i32, i32, i32, i32, i32, i16, i32, i32, i32, i32, i32, i16, i16, [6 x i32], i32, i32, i32, i8, i8, i8, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i16, i8, i8, i32, i32, i32, i8, i8, i16, i32, i32, i32, i8, i8, i8, %struct.EFI_IPv4_ADDRESS, ptr }
%struct._TCP_PEER = type { i32, i16 }
%struct._LIST_ENTRY = type { ptr, ptr }
%struct.EFI_IPv4_ADDRESS = type { [4 x i8] }
%struct._SOCKET = type { i32, ptr, ptr, ptr, ptr, %struct._LIST_ENTRY, i8, i32, i8, i16, %struct.EFI_LOCK, %struct._SOCK_BUFFER, %struct._SOCK_BUFFER, i64, i8, i32, i32, ptr, %struct._LIST_ENTRY, %struct._LIST_ENTRY, %struct._LIST_ENTRY, %struct._LIST_ENTRY, %struct._LIST_ENTRY, ptr, ptr, ptr, [20 x i8], %union._NET_PROTOCOL, ptr, ptr, ptr }
%struct.EFI_LOCK = type { i64, i64, i32 }
%struct._SOCK_BUFFER = type { i32, i32, ptr }
%union._NET_PROTOCOL = type { %struct._EFI_TCP4_PROTOCOL }
%struct._EFI_TCP4_PROTOCOL = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local void @TcpKeepaliveTimeout(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds %struct._TCP_CB, ptr %3, i32 0, i32 53
  %5 = load i8, ptr %4, align 1, !tbaa !9
  %6 = add i8 %5, 1
  store i8 %6, ptr %4, align 1, !tbaa !9
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct._TCP_CB, ptr %7, i32 0, i32 53
  %9 = load i8, ptr %8, align 1, !tbaa !9
  %10 = zext i8 %9 to i32
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct._TCP_CB, ptr %11, i32 0, i32 52
  %13 = load i8, ptr %12, align 4, !tbaa !16
  %14 = zext i8 %13 to i32
  %15 = icmp sgt i32 %10, %14
  br i1 %15, label %16, label %30

16:                                               ; preds = %1
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct._TCP_CB, ptr %17, i32 0, i32 2
  %19 = load ptr, ptr %18, align 8, !tbaa !17
  %20 = getelementptr inbounds %struct._SOCKET, ptr %19, i32 0, i32 13
  %21 = load i64, ptr %20, align 8, !tbaa !18
  %22 = icmp eq i64 -9223372036854775787, %21
  br i1 %22, label %23, label %28

23:                                               ; preds = %16
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct._TCP_CB, ptr %24, i32 0, i32 2
  %26 = load ptr, ptr %25, align 8, !tbaa !17
  %27 = getelementptr inbounds %struct._SOCKET, ptr %26, i32 0, i32 13
  store i64 -9223372036854775790, ptr %27, align 8, !tbaa !18
  br label %28

28:                                               ; preds = %23, %16
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  call void @TcpClose(ptr noundef %29)
  br label %34

30:                                               ; preds = %1
  %31 = load ptr, ptr %2, align 8, !tbaa !5
  %32 = call i64 @TcpSendZeroProbe(ptr noundef %31)
  %33 = load ptr, ptr %2, align 8, !tbaa !5
  call void @TcpSetKeepaliveTimer(ptr noundef %33)
  br label %34

34:                                               ; preds = %30, %28
  ret void
}

; Function Attrs: nounwind uwtable
declare dso_local void @TcpClose(ptr noundef) #0

declare i64 @TcpSendZeroProbe(ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local void @TcpSetKeepaliveTimer(ptr noundef) #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" }
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" }

!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, !7, i64 253}
!10 = !{!"_TCP_CB", !11, i64 0, !6, i64 16, !6, i64 24, !12, i64 32, !12, i64 40, !11, i64 48, !11, i64 64, !13, i64 80, !13, i64 84, !7, i64 88, !7, i64 89, !14, i64 90, !13, i64 92, !13, i64 96, !13, i64 100, !13, i64 104, !13, i64 108, !13, i64 112, !13, i64 116, !13, i64 120, !13, i64 124, !14, i64 128, !13, i64 132, !13, i64 136, !13, i64 140, !13, i64 144, !13, i64 148, !14, i64 152, !14, i64 154, !7, i64 156, !13, i64 180, !13, i64 184, !13, i64 188, !7, i64 192, !7, i64 193, !7, i64 194, !13, i64 196, !13, i64 200, !13, i64 204, !13, i64 208, !13, i64 212, !13, i64 216, !13, i64 220, !13, i64 224, !13, i64 228, !13, i64 232, !14, i64 236, !7, i64 238, !7, i64 239, !13, i64 240, !13, i64 244, !13, i64 248, !7, i64 252, !7, i64 253, !14, i64 254, !13, i64 256, !13, i64 260, !13, i64 264, !7, i64 268, !7, i64 269, !7, i64 270, !15, i64 271, !6, i64 280}
!11 = !{!"_LIST_ENTRY", !6, i64 0, !6, i64 8}
!12 = !{!"_TCP_PEER", !13, i64 0, !14, i64 4}
!13 = !{!"int", !7, i64 0}
!14 = !{!"short", !7, i64 0}
!15 = !{!"", !7, i64 0}
!16 = !{!10, !7, i64 252}
!17 = !{!10, !6, i64 24}
!18 = !{!19, !21, i64 128}
!19 = !{!"_SOCKET", !13, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !11, i64 40, !7, i64 56, !13, i64 60, !7, i64 64, !14, i64 66, !20, i64 72, !22, i64 96, !22, i64 112, !21, i64 128, !7, i64 136, !13, i64 140, !13, i64 144, !6, i64 152, !11, i64 160, !11, i64 176, !11, i64 192, !11, i64 208, !11, i64 224, !6, i64 240, !6, i64 248, !6, i64 256, !7, i64 264, !7, i64 288, !6, i64 368, !6, i64 376, !6, i64 384}
!20 = !{!"", !21, i64 0, !21, i64 8, !13, i64 16}
!21 = !{!"long long", !7, i64 0}
!22 = !{!"_SOCK_BUFFER", !13, i64 0, !13, i64 4, !6, i64 8}


; 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
define dso_local void @TcpKeepaliveTimeout(ptr noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 253
  %3 = load i8, ptr %2, align 1, !tbaa !5
  %4 = add i8 %3, 1
  store i8 %4, ptr %2, align 1, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 252
  %6 = load i8, ptr %5, align 4, !tbaa !15
  %7 = icmp ugt i8 %4, %6
  br i1 %7, label %8, label %16

8:                                                ; preds = %1
  %9 = getelementptr inbounds i8, ptr %0, i64 24
  %10 = load ptr, ptr %9, align 8, !tbaa !16
  %11 = getelementptr inbounds i8, ptr %10, i64 128
  %12 = load i64, ptr %11, align 8, !tbaa !17
  %13 = icmp eq i64 %12, -9223372036854775787
  br i1 %13, label %14, label %15

14:                                               ; preds = %8
  store i64 -9223372036854775790, ptr %11, align 8, !tbaa !17
  br label %15

15:                                               ; preds = %14, %8
  tail call void @TcpClose(ptr noundef nonnull %0)
  br label %18

16:                                               ; preds = %1
  %17 = tail call i64 @TcpSendZeroProbe(ptr noundef nonnull %0) #2
  tail call void @TcpSetKeepaliveTimer(ptr noundef nonnull %0)
  br label %18

18:                                               ; preds = %16, %15
  ret void
}

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

declare i64 @TcpSendZeroProbe(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local void @TcpSetKeepaliveTimer(ptr noundef) local_unnamed_addr #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" }
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 }

!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, !9, i64 253}
!6 = !{!"_TCP_CB", !7, i64 0, !8, i64 16, !8, i64 24, !11, i64 32, !11, i64 40, !7, i64 48, !7, i64 64, !12, i64 80, !12, i64 84, !9, i64 88, !9, i64 89, !13, i64 90, !12, i64 92, !12, i64 96, !12, i64 100, !12, i64 104, !12, i64 108, !12, i64 112, !12, i64 116, !12, i64 120, !12, i64 124, !13, i64 128, !12, i64 132, !12, i64 136, !12, i64 140, !12, i64 144, !12, i64 148, !13, i64 152, !13, i64 154, !9, i64 156, !12, i64 180, !12, i64 184, !12, i64 188, !9, i64 192, !9, i64 193, !9, i64 194, !12, i64 196, !12, i64 200, !12, i64 204, !12, i64 208, !12, i64 212, !12, i64 216, !12, i64 220, !12, i64 224, !12, i64 228, !12, i64 232, !13, i64 236, !9, i64 238, !9, i64 239, !12, i64 240, !12, i64 244, !12, i64 248, !9, i64 252, !9, i64 253, !13, i64 254, !12, i64 256, !12, i64 260, !12, i64 264, !9, i64 268, !9, i64 269, !9, i64 270, !14, i64 271, !8, i64 280}
!7 = !{!"_LIST_ENTRY", !8, i64 0, !8, i64 8}
!8 = !{!"any pointer", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = !{!"_TCP_PEER", !12, i64 0, !13, i64 4}
!12 = !{!"int", !9, i64 0}
!13 = !{!"short", !9, i64 0}
!14 = !{!"", !9, i64 0}
!15 = !{!6, !9, i64 252}
!16 = !{!6, !8, i64 24}
!17 = !{!18, !20, i64 128}
!18 = !{!"_SOCKET", !12, i64 0, !8, i64 8, !8, i64 16, !8, i64 24, !8, i64 32, !7, i64 40, !9, i64 56, !12, i64 60, !9, i64 64, !13, i64 66, !19, i64 72, !21, i64 96, !21, i64 112, !20, i64 128, !9, i64 136, !12, i64 140, !12, i64 144, !8, i64 152, !7, i64 160, !7, i64 176, !7, i64 192, !7, i64 208, !7, i64 224, !8, i64 240, !8, i64 248, !8, i64 256, !9, i64 264, !9, i64 288, !8, i64 368, !8, i64 376, !8, i64 384}
!19 = !{!"", !20, i64 0, !20, i64 8, !12, i64 16}
!20 = !{!"long long", !9, i64 0}
!21 = !{!"_SOCK_BUFFER", !12, i64 0, !12, i64 4, !8, i64 8}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InstCombinePass,SROAPass,TailCallElimPass