; LLVM IR from ugnmura/bouncing-balls :: src (main)

; 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 }

@stderr = external global ptr, align 8
@.str.4 = external hidden unnamed_addr constant [31 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [3 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

; Function Attrs: nounwind uwtable
declare dso_local i32 @run_ball(ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #3 {
  %1 = alloca i32, align 4
  %2 = alloca %struct.sockaddr_in, align 4
  %3 = alloca %struct.sockaddr_in, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr %2) #8
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #8
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #8
  %8 = call i32 @socket(i32 noundef 2, i32 noundef 1, i32 noundef 0) #8
  store i32 %8, ptr %4, align 4, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 4 %2, i8 0, i64 16, i1 false)
  %9 = getelementptr inbounds %struct.sockaddr_in, ptr %2, i32 0, i32 0
  store i16 2, ptr %9, align 4, !tbaa !9
  %10 = call i32 @__bswap_32(i32 noundef 0)
  %11 = getelementptr inbounds %struct.sockaddr_in, ptr %2, i32 0, i32 2
  %12 = getelementptr inbounds %struct.in_addr, ptr %11, i32 0, i32 0
  store i32 %10, ptr %12, align 4, !tbaa !13
  %13 = call zeroext i16 @__bswap_16(i16 noundef zeroext 8013)
  %14 = getelementptr inbounds %struct.sockaddr_in, ptr %2, i32 0, i32 1
  store i16 %13, ptr %14, align 2, !tbaa !14
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = call i32 @bind(i32 noundef %15, ptr noundef %2, i32 noundef 16) #8
  %17 = icmp slt i32 %16, 0
  br i1 %17, label %18, label %21

18:                                               ; preds = %0
  %19 = load ptr, ptr @stderr, align 8, !tbaa !15
  %20 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %19, ptr noundef @.str.4) #8
  call void @exit(i32 noundef 1) #9
  unreachable

21:                                               ; preds = %0
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = call i32 @listen(i32 noundef %22, i32 noundef 5) #8
  br label %24

24:                                               ; preds = %37, %21
  br label %25

25:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #8
  store i32 16, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #8
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = call i32 @accept(i32 noundef %26, ptr noundef %3, ptr noundef %5)
  store i32 %27, ptr %6, align 4, !tbaa !5
  %28 = call i32 @fork() #8
  %29 = icmp ne i32 %28, 0
  br i1 %29, label %37, label %30

30:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #8
  %31 = load i32, ptr %6, align 4, !tbaa !5
  %32 = call noalias ptr @fdopen(i32 noundef %31, ptr noundef @.str.5) #8
  store ptr %32, ptr %7, align 8, !tbaa !15
  %33 = load ptr, ptr %7, align 8, !tbaa !15
  %34 = call i32 @run_ball(ptr noundef %33)
  %35 = load ptr, ptr %7, align 8, !tbaa !15
  %36 = call i32 @fclose(ptr noundef %35)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #8
  br label %37

37:                                               ; preds = %30, %25
  %38 = load i32, ptr %6, align 4, !tbaa !5
  %39 = call i32 @close(i32 noundef %38)
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #8
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #8
  br label %24
}

; Function Attrs: nounwind
declare i32 @socket(i32 noundef, i32 noundef, i32 noundef) #4

; Function Attrs: inlinehint nounwind uwtable
declare hidden i32 @__bswap_32(i32 noundef) #5

; Function Attrs: inlinehint nounwind uwtable
declare hidden zeroext i16 @__bswap_16(i16 noundef zeroext) #5

; Function Attrs: nounwind
declare i32 @bind(i32 noundef, ptr noundef, i32 noundef) #4

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #4

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #6

; Function Attrs: nounwind
declare i32 @listen(i32 noundef, i32 noundef) #4

declare i32 @accept(i32 noundef, ptr noundef, ptr noundef) #7

; Function Attrs: nounwind
declare i32 @fork() #4

; Function Attrs: nounwind
declare noalias ptr @fdopen(i32 noundef, ptr noundef) #4

declare i32 @fclose(ptr noundef) #7

declare i32 @close(i32 noundef) #7

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { nounwind uwtable "min-legal-vector-width"="64" "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 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 = { 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 #5 = { 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 #6 = { noreturn 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 #7 = { "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 #8 = { nounwind }
attributes #9 = { noreturn 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}
!15 = !{!16, !16, i64 0}
!16 = !{!"any pointer", !7, i64 0}


; 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 }

@stderr = external local_unnamed_addr global ptr, align 8
@.str.4 = external hidden unnamed_addr constant [31 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [3 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: nounwind uwtable
declare dso_local i32 @run_ball(ptr noundef) local_unnamed_addr #1

; Function Attrs: noreturn nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca %struct.sockaddr_in, align 4
  %2 = alloca %struct.sockaddr_in, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %1) #8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #8
  %4 = tail call i32 @socket(i32 noundef 2, i32 noundef 1, i32 noundef 0) #8
  %5 = getelementptr inbounds i8, ptr %1, i64 8
  store i64 0, ptr %5, align 4
  store i16 2, ptr %1, align 4, !tbaa !5
  %6 = tail call i32 @__bswap_32(i32 noundef 0)
  %7 = getelementptr inbounds i8, ptr %1, i64 4
  store i32 %6, ptr %7, align 4, !tbaa !12
  %8 = tail call zeroext i16 @__bswap_16(i16 noundef zeroext 8013)
  %9 = getelementptr inbounds i8, ptr %1, i64 2
  store i16 %8, ptr %9, align 2, !tbaa !13
  %10 = call i32 @bind(i32 noundef %4, ptr noundef nonnull %1, i32 noundef 16) #8
  %11 = icmp slt i32 %10, 0
  br i1 %11, label %12, label %15

12:                                               ; preds = %0
  %13 = load ptr, ptr @stderr, align 8, !tbaa !14
  %14 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %13, ptr noundef nonnull @.str.4) #9
  call void @exit(i32 noundef 1) #10
  unreachable

15:                                               ; preds = %0
  %16 = call i32 @listen(i32 noundef %4, i32 noundef 5) #8
  br label %17

17:                                               ; preds = %24, %15
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #8
  store i32 16, ptr %3, align 4, !tbaa !16
  %18 = call i32 @accept(i32 noundef %4, ptr noundef nonnull %2, ptr noundef nonnull %3) #8
  %19 = call i32 @fork() #8
  %.not = icmp eq i32 %19, 0
  br i1 %.not, label %20, label %24

20:                                               ; preds = %17
  %21 = call noalias ptr @fdopen(i32 noundef %18, ptr noundef nonnull @.str.5) #8
  %22 = call i32 @run_ball(ptr noundef %21)
  %23 = call i32 @fclose(ptr noundef %21)
  br label %24

24:                                               ; preds = %20, %17
  %25 = call i32 @close(i32 noundef %18) #8
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #8
  br label %17
}

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

; Function Attrs: inlinehint nounwind uwtable
declare hidden i32 @__bswap_32(i32 noundef) local_unnamed_addr #4

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

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

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #5

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #6

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

declare i32 @accept(i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #7

; Function Attrs: nofree nounwind
declare i32 @fork() local_unnamed_addr #5

; Function Attrs: nofree nounwind
declare noalias noundef ptr @fdopen(i32 noundef, ptr nocapture noundef readonly) local_unnamed_addr #5

; Function Attrs: nofree nounwind
declare noundef i32 @fclose(ptr nocapture noundef) local_unnamed_addr #5

declare i32 @close(i32 noundef) local_unnamed_addr #7

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind uwtable "min-legal-vector-width"="64" "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 = { noreturn 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 #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 = { 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 #6 = { noreturn 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 #7 = { "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 #8 = { nounwind }
attributes #9 = { cold nounwind }
attributes #10 = { noreturn 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, !7, i64 0}
!6 = !{!"sockaddr_in", !7, i64 0, !7, i64 2, !10, i64 4, !8, i64 8}
!7 = !{!"short", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"in_addr", !11, i64 0}
!11 = !{!"int", !8, i64 0}
!12 = !{!6, !11, i64 4}
!13 = !{!6, !7, i64 2}
!14 = !{!15, !15, i64 0}
!15 = !{!"any pointer", !8, i64 0}
!16 = !{!11, !11, i64 0}


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