; LLVM IR from aap/pdp6 :: fe6 (util)

; 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.sockaddr_in = type { i16, i16, %struct.in_addr, [8 x i8] }
%struct.in_addr = type { i32 }

@.str.3 = external hidden unnamed_addr constant [14 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [14 x i8], align 1

; 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: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

declare void @perror(ptr noundef) #2

; Function Attrs: nounwind
declare i32 @socket(i32 noundef, i32 noundef, i32 noundef) #3

; Function Attrs: nounwind
declare i32 @setsockopt(i32 noundef, i32 noundef, i32 noundef, ptr noundef, i32 noundef) #3

; Function Attrs: inlinehint nounwind uwtable
declare hidden zeroext i16 @__bswap_16(i16 noundef zeroext) #4

; Function Attrs: nounwind
declare i32 @bind(i32 noundef, ptr noundef, i32 noundef) #3

; Function Attrs: nounwind
declare i32 @listen(i32 noundef, i32 noundef) #3

declare i32 @accept(i32 noundef, ptr noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @serve1(i32 noundef %0) #5 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca %struct.sockaddr_in, align 4
  %8 = alloca %struct.sockaddr_in, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #6
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #6
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #6
  call void @llvm.lifetime.start.p0(i64 16, ptr %7) #6
  call void @llvm.lifetime.start.p0(i64 16, ptr %8) #6
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #6
  %11 = call i32 @socket(i32 noundef 2, i32 noundef 1, i32 noundef 0) #6
  store i32 %11, ptr %4, align 4, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = icmp slt i32 %12, 0
  br i1 %13, label %14, label %15

14:                                               ; preds = %1
  call void @perror(ptr noundef @.str.3)
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %10, align 4
  br label %40

15:                                               ; preds = %1
  store i32 1, ptr %9, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = call i32 @setsockopt(i32 noundef %16, i32 noundef 1, i32 noundef 2, ptr noundef %9, i32 noundef 4) #6
  call void @llvm.memset.p0.i64(ptr align 4 %7, i8 0, i64 16, i1 false)
  %18 = getelementptr inbounds %struct.sockaddr_in, ptr %7, i32 0, i32 0
  store i16 2, ptr %18, align 4, !tbaa !9
  %19 = getelementptr inbounds %struct.sockaddr_in, ptr %7, i32 0, i32 2
  %20 = getelementptr inbounds %struct.in_addr, ptr %19, i32 0, i32 0
  store i32 0, ptr %20, align 4, !tbaa !13
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = trunc i32 %21 to i16
  %23 = call zeroext i16 @__bswap_16(i16 noundef zeroext %22)
  %24 = getelementptr inbounds %struct.sockaddr_in, ptr %7, i32 0, i32 1
  store i16 %23, ptr %24, align 2, !tbaa !14
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = call i32 @bind(i32 noundef %25, ptr noundef %7, i32 noundef 16) #6
  %27 = icmp slt i32 %26, 0
  br i1 %27, label %28, label %29

28:                                               ; preds = %15
  call void @perror(ptr noundef @.str.4)
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %10, align 4
  br label %40

29:                                               ; preds = %15
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = call i32 @listen(i32 noundef %30, i32 noundef 5) #6
  store i32 16, ptr %6, align 4, !tbaa !5
  br label %32

32:                                               ; preds = %29
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = call i32 @accept(i32 noundef %33, ptr noundef %8, ptr noundef %6)
  store i32 %34, ptr %5, align 4, !tbaa !5
  %35 = load i32, ptr %5, align 4, !tbaa !5
  %36 = icmp sge i32 %35, 0
  br i1 %36, label %37, label %39

37:                                               ; preds = %32
  %38 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %38, ptr %2, align 4
  store i32 1, ptr %10, align 4
  br label %40

39:                                               ; preds = %32
  call void @perror(ptr noundef @.str.5)
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %10, align 4
  br label %40

40:                                               ; preds = %39, %37, %28, %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #6
  call void @llvm.lifetime.end.p0(i64 16, ptr %8) #6
  call void @llvm.lifetime.end.p0(i64 16, ptr %7) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #6
  %41 = load i32, ptr %2, align 4
  ret i32 %41
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { "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 #3 = { nounwind "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 #4 = { inlinehint 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 #5 = { 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 #6 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"sockaddr_in", !11, i64 0, !11, i64 2, !12, i64 4, !7, i64 8}
!11 = !{!"short", !7, i64 0}
!12 = !{!"in_addr", !6, i64 0}
!13 = !{!10, !6, i64 4}
!14 = !{!10, !11, i64 2}


; 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"

%struct.sockaddr_in = type { i16, i16, %struct.in_addr, [8 x i8] }
%struct.in_addr = type { i32 }

@.str.3 = external hidden unnamed_addr constant [14 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [14 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nofree nounwind
declare void @perror(ptr nocapture noundef readonly) local_unnamed_addr #1

; Function Attrs: nounwind
declare i32 @socket(i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #2

; Function Attrs: nounwind
declare i32 @setsockopt(i32 noundef, i32 noundef, i32 noundef, ptr noundef, i32 noundef) local_unnamed_addr #2

; Function Attrs: inlinehint nounwind uwtable
declare hidden zeroext i16 @__bswap_16(i16 noundef zeroext) local_unnamed_addr #3

; Function Attrs: nounwind
declare i32 @bind(i32 noundef, ptr noundef, i32 noundef) local_unnamed_addr #2

; Function Attrs: nounwind
declare i32 @listen(i32 noundef, i32 noundef) local_unnamed_addr #2

declare i32 @accept(i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #4

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, -2147483648) i32 @serve1(i32 noundef %0) local_unnamed_addr #5 {
  %2 = alloca i32, align 4
  %3 = alloca %struct.sockaddr_in, align 4
  %4 = alloca %struct.sockaddr_in, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #6
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #6
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %4) #6
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #6
  %6 = tail call i32 @socket(i32 noundef 2, i32 noundef 1, i32 noundef 0) #6
  %7 = icmp slt i32 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  tail call void @perror(ptr noundef nonnull @.str.3) #7
  br label %24

9:                                                ; preds = %1
  store i32 1, ptr %5, align 4, !tbaa !5
  %10 = call i32 @setsockopt(i32 noundef %6, i32 noundef 1, i32 noundef 2, ptr noundef nonnull %5, i32 noundef 4) #6
  %11 = getelementptr inbounds i8, ptr %3, i64 8
  store i64 0, ptr %11, align 4
  store i16 2, ptr %3, align 4, !tbaa !9
  %12 = getelementptr inbounds i8, ptr %3, i64 4
  store i32 0, ptr %12, align 4, !tbaa !13
  %13 = trunc i32 %0 to i16
  %14 = call zeroext i16 @__bswap_16(i16 noundef zeroext %13)
  %15 = getelementptr inbounds i8, ptr %3, i64 2
  store i16 %14, ptr %15, align 2, !tbaa !14
  %16 = call i32 @bind(i32 noundef %6, ptr noundef nonnull %3, i32 noundef 16) #6
  %17 = icmp slt i32 %16, 0
  br i1 %17, label %18, label %19

18:                                               ; preds = %9
  call void @perror(ptr noundef nonnull @.str.4) #7
  br label %24

19:                                               ; preds = %9
  %20 = call i32 @listen(i32 noundef %6, i32 noundef 5) #6
  store i32 16, ptr %2, align 4, !tbaa !5
  %21 = call i32 @accept(i32 noundef %6, ptr noundef nonnull %4, ptr noundef nonnull %2) #6
  %22 = icmp sgt i32 %21, -1
  br i1 %22, label %24, label %23

23:                                               ; preds = %19
  call void @perror(ptr noundef nonnull @.str.5) #7
  br label %24

24:                                               ; preds = %19, %23, %18, %8
  %.0 = phi i32 [ -1, %8 ], [ -1, %18 ], [ -1, %23 ], [ %21, %19 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #6
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %4) #6
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #6
  ret i32 %.0
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nofree nounwind "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 "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 #3 = { inlinehint 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 #4 = { "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 #5 = { 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 #6 = { nounwind }
attributes #7 = { cold }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"sockaddr_in", !11, i64 0, !11, i64 2, !12, i64 4, !7, i64 8}
!11 = !{!"short", !7, i64 0}
!12 = !{!"in_addr", !6, i64 0}
!13 = !{!10, !6, i64 4}
!14 = !{!10, !11, i64 2}


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