; LLVM IR from asllop/AppOS :: net/ipv4 (ipv4_internal)

; 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.NetIfaceStruct = type { i32, i8, i16, i8, i32, i32, i32, [128 x ptr], %struct.NetFragStruct, %struct.NetFragStruct }
%struct.NetFragStruct = type { i16, i8, [32 x ptr] }

; Function Attrs: nounwind uwtable
declare dso_local zeroext i8 @ipv4_is_full(ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @ipv4_enqueue(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = call zeroext i8 @ipv4_is_full(ptr noundef %5)
  %7 = icmp ne i8 %6, 0
  br i1 %7, label %30, label %8

8:                                                ; preds = %2
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.NetIfaceStruct, ptr %9, i32 0, i32 5
  %11 = load i32, ptr %10, align 8, !tbaa !9
  %12 = icmp eq i32 %11, 127
  br i1 %12, label %13, label %16

13:                                               ; preds = %8
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.NetIfaceStruct, ptr %14, i32 0, i32 5
  store i32 -1, ptr %15, align 8, !tbaa !9
  br label %16

16:                                               ; preds = %13, %8
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.NetIfaceStruct, ptr %18, i32 0, i32 7
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.NetIfaceStruct, ptr %20, i32 0, i32 5
  %22 = load i32, ptr %21, align 8, !tbaa !9
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %21, align 8, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [128 x ptr], ptr %19, i64 0, i64 %24
  store ptr %17, ptr %25, align 8, !tbaa !5
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.NetIfaceStruct, ptr %26, i32 0, i32 6
  %28 = load i32, ptr %27, align 4, !tbaa !14
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %27, align 4, !tbaa !14
  br label %30

30:                                               ; preds = %16, %2
  ret void
}

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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 16}
!10 = !{!"NetIfaceStruct", !11, i64 0, !7, i64 4, !12, i64 6, !7, i64 8, !11, i64 12, !11, i64 16, !11, i64 20, !7, i64 24, !13, i64 1048, !13, i64 1312}
!11 = !{!"int", !7, i64 0}
!12 = !{!"short", !7, i64 0}
!13 = !{!"NetFragStruct", !12, i64 0, !7, i64 2, !7, i64 8}
!14 = !{!10, !11, i64 20}


; 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 zeroext i8 @ipv4_is_full(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @ipv4_enqueue(ptr noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = tail call zeroext i8 @ipv4_is_full(ptr noundef %0)
  %.not = icmp eq i8 %3, 0
  br i1 %.not, label %4, label %16

4:                                                ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = load i32, ptr %5, align 8, !tbaa !5
  %7 = icmp eq i32 %6, 127
  %8 = add nsw i32 %6, 1
  %9 = getelementptr inbounds i8, ptr %0, i64 24
  %10 = select i1 %7, i32 0, i32 %8
  store i32 %10, ptr %5, align 8, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [128 x ptr], ptr %9, i64 0, i64 %11
  store ptr %1, ptr %12, align 8, !tbaa !12
  %13 = getelementptr inbounds i8, ptr %0, i64 20
  %14 = load i32, ptr %13, align 4, !tbaa !14
  %15 = add nsw i32 %14, 1
  store i32 %15, ptr %13, align 4, !tbaa !14
  br label %16

16:                                               ; preds = %4, %2
  ret void
}

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 16}
!6 = !{!"NetIfaceStruct", !7, i64 0, !8, i64 4, !10, i64 6, !8, i64 8, !7, i64 12, !7, i64 16, !7, i64 20, !8, i64 24, !11, i64 1048, !11, i64 1312}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"short", !8, i64 0}
!11 = !{!"NetFragStruct", !10, i64 0, !8, i64 2, !8, i64 8}
!12 = !{!13, !13, i64 0}
!13 = !{!"any pointer", !8, i64 0}
!14 = !{!6, !7, i64 20}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass