; LLVM IR from git-akshat/NP-Lab :: A5 (UDP) (ServerUDP)

; 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 = external hidden unnamed_addr constant [36 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [10 x i8], align 1
@stdin = external global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca [1024 x i8], align 16
  %3 = alloca [1024 x i8], align 16
  %4 = alloca %struct.sockaddr_in, align 4
  %5 = alloca %struct.sockaddr_in, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 1024, ptr %2) #7
  call void @llvm.lifetime.start.p0(i64 1024, ptr %3) #7
  call void @llvm.lifetime.start.p0(i64 16, ptr %4) #7
  call void @llvm.lifetime.start.p0(i64 16, ptr %5) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #7
  %10 = call i32 @socket(i32 noundef 2, i32 noundef 2, i32 noundef 0) #7
  store i32 %10, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #7
  store i32 1, ptr %7, align 4, !tbaa !5
  %11 = load i32, ptr %6, align 4, !tbaa !5
  %12 = call i32 @setsockopt(i32 noundef %11, i32 noundef 1, i32 noundef 2, ptr noundef %7, i32 noundef 4) #7
  call void @llvm.memset.p0.i64(ptr align 4 %4, i8 0, i64 16, i1 false)
  call void @llvm.memset.p0.i64(ptr align 4 %5, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #7
  store i32 16, ptr %8, align 4, !tbaa !5
  %13 = getelementptr inbounds %struct.sockaddr_in, ptr %4, i32 0, i32 0
  store i16 2, ptr %13, align 4, !tbaa !9
  %14 = getelementptr inbounds %struct.sockaddr_in, ptr %4, i32 0, i32 2
  %15 = getelementptr inbounds %struct.in_addr, ptr %14, i32 0, i32 0
  store i32 0, ptr %15, align 4, !tbaa !13
  %16 = call zeroext i16 @__bswap_16(i16 noundef zeroext 1234)
  %17 = getelementptr inbounds %struct.sockaddr_in, ptr %4, i32 0, i32 1
  store i16 %16, ptr %17, align 2, !tbaa !14
  %18 = load i32, ptr %6, align 4, !tbaa !5
  %19 = call i32 @bind(i32 noundef %18, ptr noundef %4, i32 noundef 16) #7
  %20 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  br label %21

21:                                               ; preds = %22, %0
  br label %22

22:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #7
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = getelementptr inbounds [1024 x i8], ptr %2, i64 0, i64 0
  %25 = call i64 @recvfrom(i32 noundef %23, ptr noundef %24, i64 noundef 1024, i32 noundef 0, ptr noundef %5, ptr noundef %8)
  %26 = trunc i64 %25 to i32
  store i32 %26, ptr %9, align 4, !tbaa !5
  %27 = load i32, ptr %9, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [1024 x i8], ptr %2, i64 0, i64 %28
  store i8 0, ptr %29, align 1, !tbaa !15
  %30 = getelementptr inbounds [1024 x i8], ptr %2, i64 0, i64 0
  %31 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, ptr noundef %30)
  %32 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  %33 = getelementptr inbounds [1024 x i8], ptr %3, i64 0, i64 0
  %34 = load ptr, ptr @stdin, align 8, !tbaa !16
  %35 = call ptr @fgets(ptr noundef %33, i32 noundef 1024, ptr noundef %34)
  %36 = load i32, ptr %6, align 4, !tbaa !5
  %37 = getelementptr inbounds [1024 x i8], ptr %3, i64 0, i64 0
  %38 = getelementptr inbounds [1024 x i8], ptr %3, i64 0, i64 0
  %39 = call i64 @strlen(ptr noundef %38) #8
  %40 = load i32, ptr %8, align 4, !tbaa !5
  %41 = call i64 @sendto(i32 noundef %36, ptr noundef %37, i64 noundef %39, i32 noundef 0, ptr noundef %5, i32 noundef %40)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #7
  br label %21
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

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

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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #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) #2

declare i32 @printf(ptr noundef, ...) #5

declare i64 @recvfrom(i32 noundef, ptr noundef, i64 noundef, i32 noundef, ptr noundef, ptr noundef) #5

declare ptr @fgets(ptr noundef, i32 noundef, ptr noundef) #5

declare i64 @sendto(i32 noundef, ptr noundef, i64 noundef, i32 noundef, ptr noundef, i32 noundef) #5

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #6

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = { "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 willreturn memory(read) "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 = { nounwind }
attributes #8 = { nounwind willreturn memory(read) }

!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 = !{!7, !7, i64 0}
!16 = !{!17, !17, i64 0}
!17 = !{!"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 }

@.str = external hidden unnamed_addr constant [36 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [10 x i8], align 1
@stdin = external local_unnamed_addr global ptr, align 8

; Function Attrs: noreturn nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca [1024 x i8], align 16
  %2 = alloca [1024 x i8], align 16
  %3 = alloca %struct.sockaddr_in, align 4
  %4 = alloca %struct.sockaddr_in, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 1024, ptr nonnull %1) #8
  call void @llvm.lifetime.start.p0(i64 1024, ptr nonnull %2) #8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %4) #8
  %7 = tail call i32 @socket(i32 noundef 2, i32 noundef 2, i32 noundef 0) #8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #8
  store i32 1, ptr %5, align 4, !tbaa !5
  %8 = call i32 @setsockopt(i32 noundef %7, i32 noundef 1, i32 noundef 2, ptr noundef nonnull %5, i32 noundef 4) #8
  %9 = getelementptr inbounds i8, ptr %3, i64 8
  store i64 0, ptr %9, align 4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 4 dereferenceable(16) %4, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %6) #8
  store i32 16, ptr %6, align 4, !tbaa !5
  store i16 2, ptr %3, align 4, !tbaa !9
  %10 = getelementptr inbounds i8, ptr %3, i64 4
  store i32 0, ptr %10, align 4, !tbaa !13
  %11 = call zeroext i16 @__bswap_16(i16 noundef zeroext 1234)
  %12 = getelementptr inbounds i8, ptr %3, i64 2
  store i16 %11, ptr %12, align 2, !tbaa !14
  %13 = call i32 @bind(i32 noundef %7, ptr noundef nonnull %3, i32 noundef 16) #8
  %14 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  br label %15

15:                                               ; preds = %15, %0
  %16 = call i64 @recvfrom(i32 noundef %7, ptr noundef nonnull %1, i64 noundef 1024, i32 noundef 0, ptr noundef nonnull %4, ptr noundef nonnull %6) #8
  %sext = shl i64 %16, 32
  %17 = ashr exact i64 %sext, 32
  %18 = getelementptr inbounds [1024 x i8], ptr %1, i64 0, i64 %17
  store i8 0, ptr %18, align 1, !tbaa !15
  %19 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, ptr noundef nonnull %1)
  %20 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %21 = load ptr, ptr @stdin, align 8, !tbaa !16
  %22 = call ptr @fgets(ptr noundef nonnull %2, i32 noundef 1024, ptr noundef %21)
  %23 = call i64 @strlen(ptr noundef nonnull dereferenceable(1) %2) #9
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = call i64 @sendto(i32 noundef %7, ptr noundef nonnull %2, i64 noundef %23, i32 noundef 0, ptr noundef nonnull %4, i32 noundef %24) #8
  br label %15
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #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: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; 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 #2

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

declare i64 @recvfrom(i32 noundef, ptr noundef, i64 noundef, i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #6

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

declare i64 @sendto(i32 noundef, ptr noundef, i64 noundef, i32 noundef, ptr noundef, i32 noundef) local_unnamed_addr #6

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #7

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
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 = { "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 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 = { nounwind willreturn memory(read) }

!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 = !{!7, !7, i64 0}
!16 = !{!17, !17, i64 0}
!17 = !{!"any pointer", !7, i64 0}


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