; LLVM IR from AllenDowney/ExercisesInC :: exercises/web_server (tcpcli01)

; 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 [26 x i8], align 1
@stdin = external global ptr, align 8

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

10:                                               ; preds = %2
  call void (ptr, ...) @err_quit(ptr noundef @.str)
  br label %11

11:                                               ; preds = %10, %2
  %12 = call i32 @Socket(i32 noundef 2, i32 noundef 1, i32 noundef 0)
  store i32 %12, ptr %6, align 4, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 4 %7, i8 0, i64 16, i1 false)
  %13 = getelementptr inbounds %struct.sockaddr_in, ptr %7, i32 0, i32 0
  store i16 2, ptr %13, align 4, !tbaa !11
  %14 = call zeroext i16 @__bswap_16(i16 noundef zeroext 9877)
  %15 = getelementptr inbounds %struct.sockaddr_in, ptr %7, i32 0, i32 1
  store i16 %14, ptr %15, align 2, !tbaa !15
  %16 = load ptr, ptr %5, align 8, !tbaa !9
  %17 = getelementptr inbounds ptr, ptr %16, i64 1
  %18 = load ptr, ptr %17, align 8, !tbaa !9
  %19 = getelementptr inbounds %struct.sockaddr_in, ptr %7, i32 0, i32 2
  call void @Inet_pton(i32 noundef 2, ptr noundef %18, ptr noundef %19)
  %20 = load i32, ptr %6, align 4, !tbaa !5
  call void @Connect(i32 noundef %20, ptr noundef %7, i32 noundef 16)
  %21 = load ptr, ptr @stdin, align 8, !tbaa !9
  %22 = load i32, ptr %6, align 4, !tbaa !5
  call void @str_cli(ptr noundef %21, i32 noundef %22)
  call void @exit(i32 noundef 0) #7
  unreachable
}

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

declare void @err_quit(ptr noundef, ...) #2

declare i32 @Socket(i32 noundef, i32 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

declare void @Inet_pton(i32 noundef, ptr noundef, ptr noundef) #2

declare void @Connect(i32 noundef, ptr noundef, i32 noundef) #2

declare void @str_cli(ptr noundef, i32 noundef) #2

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #5

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 = { "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 = { 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 #6 = { nounwind }
attributes #7 = { 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, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !13, i64 0}
!12 = !{!"sockaddr_in", !13, i64 0, !13, i64 2, !14, i64 4, !7, i64 8}
!13 = !{!"short", !7, i64 0}
!14 = !{!"in_addr", !6, i64 0}
!15 = !{!12, !13, 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 = external hidden unnamed_addr constant [26 x i8], align 1
@stdin = external local_unnamed_addr global ptr, align 8

; Function Attrs: noreturn nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = alloca %struct.sockaddr_in, align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #6
  %.not = icmp eq i32 %0, 2
  br i1 %.not, label %5, label %4

4:                                                ; preds = %2
  tail call void (ptr, ...) @err_quit(ptr noundef nonnull @.str) #6
  br label %5

5:                                                ; preds = %4, %2
  %6 = tail call i32 @Socket(i32 noundef 2, i32 noundef 1, i32 noundef 0) #6
  %7 = getelementptr inbounds i8, ptr %3, i64 4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 4 dereferenceable(16) %7, i8 0, i64 12, i1 false)
  store i16 2, ptr %3, align 4, !tbaa !5
  %8 = tail call zeroext i16 @__bswap_16(i16 noundef zeroext 9877)
  %9 = getelementptr inbounds i8, ptr %3, i64 2
  store i16 %8, ptr %9, align 2, !tbaa !12
  %10 = getelementptr inbounds i8, ptr %1, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !13
  %12 = getelementptr inbounds i8, ptr %3, i64 4
  call void @Inet_pton(i32 noundef 2, ptr noundef %11, ptr noundef nonnull %12) #6
  call void @Connect(i32 noundef %6, ptr noundef nonnull %3, i32 noundef 16) #6
  %13 = load ptr, ptr @stdin, align 8, !tbaa !13
  call void @str_cli(ptr noundef %13, i32 noundef %6) #6
  call void @exit(i32 noundef 0) #7
  unreachable
}

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

declare void @err_quit(ptr noundef, ...) local_unnamed_addr #2

declare i32 @Socket(i32 noundef, i32 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

declare void @Inet_pton(i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #2

declare void @Connect(i32 noundef, ptr noundef, i32 noundef) local_unnamed_addr #2

declare void @str_cli(ptr noundef, i32 noundef) local_unnamed_addr #2

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #5

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 = { "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 = { 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 #6 = { nounwind }
attributes #7 = { 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, !7, i64 2}
!13 = !{!14, !14, i64 0}
!14 = !{!"any pointer", !8, i64 0}


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