; LLVM IR from CerebusOSS/CereLink :: Central/UDPsocket.ll (ZNK9UDPSocket7RecvTCPEPv)

; 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"

%class.UDPSocket = type <{ ptr, i32, %struct.sockaddr_in, i32, i32, i8, i8, [2 x i8] }>
%struct.sockaddr_in = type { i16, i16, %struct.in_addr, [8 x i8] }
%struct.in_addr = type { i32 }

@.str.10 = external hidden unnamed_addr constant [38 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

declare i32 @printf(ptr noundef, ...) #1

; Function Attrs: nounwind willreturn memory(none)
declare ptr @__errno_location() #2

declare i64 @recv(i32 noundef, ptr noundef, i64 noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZNK9UDPSocket7RecvTCPEPv(ptr noundef nonnull align 8 dereferenceable(38) %0, ptr noundef %1) #3 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8
  br label %8

8:                                                ; preds = %26, %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 0, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %9 = getelementptr inbounds %class.UDPSocket, ptr %7, i32 0, i32 1
  %10 = load i32, ptr %9, align 8, !tbaa !11
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds %class.UDPSocket, ptr %7, i32 0, i32 4
  %13 = load i32, ptr %12, align 8, !tbaa !18
  %14 = sext i32 %13 to i64
  %15 = call i64 @recv(i32 noundef %10, ptr noundef %11, i64 noundef %14, i32 noundef 0)
  %16 = trunc i64 %15 to i32
  store i32 %16, ptr %6, align 4, !tbaa !9
  %17 = call ptr @__errno_location() #5
  %18 = load i32, ptr %17, align 4, !tbaa !9
  store i32 %18, ptr %5, align 4, !tbaa !9
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = icmp ne i32 %19, -1
  br i1 %20, label %21, label %25

21:                                               ; preds = %8
  %22 = load i32, ptr %6, align 4, !tbaa !9
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = call i32 (ptr, ...) @printf(ptr noundef @.str.10, i32 noundef %22, i32 noundef %23)
  br label %26

25:                                               ; preds = %8
  br label %26

26:                                               ; preds = %25, %21
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %8, !llvm.loop !19
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 willreturn memory(none) "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 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 }
attributes #5 = { nounwind willreturn memory(none) }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"_ZTS9UDPSocket", !10, i64 8, !13, i64 12, !16, i64 28, !10, i64 32, !17, i64 36, !17, i64 37}
!13 = !{!"_ZTS11sockaddr_in", !14, i64 0, !14, i64 2, !15, i64 4, !7, i64 8}
!14 = !{!"short", !7, i64 0}
!15 = !{!"_ZTS7in_addr", !10, i64 0}
!16 = !{!"_ZTS15STARTUP_OPTIONS", !7, i64 0}
!17 = !{!"bool", !7, i64 0}
!18 = !{!12, !10, i64 32}
!19 = distinct !{!19, !20}
!20 = !{!"llvm.loop.mustprogress"}


; 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"

@.str.10 = external hidden unnamed_addr constant [38 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__errno_location() local_unnamed_addr #1

declare i64 @recv(i32 noundef, ptr noundef, i64 noundef, i32 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress noreturn uwtable
define dso_local noundef i32 @_ZNK9UDPSocket7RecvTCPEPv(ptr nocapture noundef nonnull readonly align 8 dereferenceable(38) %0, ptr noundef %1) local_unnamed_addr #3 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = getelementptr inbounds i8, ptr %0, i64 32
  br label %5

5:                                                ; preds = %.backedge, %2
  %6 = load i32, ptr %3, align 8, !tbaa !5
  %7 = load i32, ptr %4, align 8, !tbaa !15
  %8 = sext i32 %7 to i64
  %9 = tail call i64 @recv(i32 noundef %6, ptr noundef %1, i64 noundef %8, i32 noundef 0)
  %10 = trunc i64 %9 to i32
  %.not = icmp eq i32 %10, -1
  br i1 %.not, label %.backedge, label %11

.backedge:                                        ; preds = %5, %11
  br label %5, !llvm.loop !16

11:                                               ; preds = %5
  %12 = tail call ptr @__errno_location() #4
  %13 = load i32, ptr %12, align 4, !tbaa !18
  %14 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.10, i32 noundef %10, i32 noundef %13)
  br label %.backedge
}

attributes #0 = { 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 #1 = { mustprogress nofree nosync nounwind willreturn memory(none) "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 = { "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 noreturn 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 willreturn memory(none) }

!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 8}
!6 = !{!"_ZTS9UDPSocket", !7, i64 8, !10, i64 12, !13, i64 28, !7, i64 32, !14, i64 36, !14, i64 37}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"_ZTS11sockaddr_in", !11, i64 0, !11, i64 2, !12, i64 4, !8, i64 8}
!11 = !{!"short", !8, i64 0}
!12 = !{!"_ZTS7in_addr", !7, i64 0}
!13 = !{!"_ZTS15STARTUP_OPTIONS", !8, i64 0}
!14 = !{!"bool", !8, i64 0}
!15 = !{!6, !7, i64 32}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}
!18 = !{!7, !7, i64 0}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass