; LLVM IR from chensoft/libsocket :: src/base/basic_socket.ll (ZN4chen12basic_socket6acceptERS0_)

; 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.std::error_code" = type { i32, ptr }

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4chen12basic_socket5resetEi(ptr noundef nonnull align 8 dereferenceable(72), i32 noundef) #0 align 2

declare { i32, ptr } @_ZN4chen3sys5errorEv() #1

; Function Attrs: noinline noreturn nounwind uwtable
declare hidden void @__clang_call_terminate(ptr noundef) #2

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress nounwind uwtable
define dso_local { i32, ptr } @_ZN4chen12basic_socket6acceptERS0_(ptr noundef nonnull align 8 dereferenceable(72) %0, ptr noundef nonnull align 8 dereferenceable(72) %1) #0 align 2 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::error_code", align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca %"class.std::error_code", align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %9 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 -1, ptr %6, align 4, !tbaa !9
  %10 = load ptr, ptr %9, align 8, !tbaa !11
  %11 = getelementptr inbounds ptr, ptr %10, i64 5
  %12 = load ptr, ptr %11, align 8
  %13 = invoke noundef i32 %12(ptr noundef nonnull align 8 dereferenceable(28) %9)
          to label %14 unwind label %37

14:                                               ; preds = %2
  %15 = invoke i32 @accept(i32 noundef %13, ptr noundef null, ptr noundef null)
          to label %16 unwind label %37

16:                                               ; preds = %14
  store i32 %15, ptr %6, align 4, !tbaa !9
  %17 = icmp eq i32 %15, -1
  br i1 %17, label %18, label %25

18:                                               ; preds = %16
  %19 = invoke { i32, ptr } @_ZN4chen3sys5errorEv()
          to label %20 unwind label %37

20:                                               ; preds = %18
  %21 = getelementptr inbounds { i32, ptr }, ptr %3, i32 0, i32 0
  %22 = extractvalue { i32, ptr } %19, 0
  store i32 %22, ptr %21, align 8
  %23 = getelementptr inbounds { i32, ptr }, ptr %3, i32 0, i32 1
  %24 = extractvalue { i32, ptr } %19, 1
  store ptr %24, ptr %23, align 8
  store i32 1, ptr %7, align 4
  br label %35

25:                                               ; preds = %16
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = load i32, ptr %6, align 4, !tbaa !9
  call void @_ZN4chen12basic_socket5resetEi(ptr noundef nonnull align 8 dereferenceable(72) %26, i32 noundef %27) #4
  %28 = load i32, ptr %6, align 4, !tbaa !9
  %29 = invoke { i32, ptr } @_ZN4chen5ioctl7cloexecEib(i32 noundef %28, i1 noundef zeroext true)
          to label %30 unwind label %37

30:                                               ; preds = %25
  %31 = getelementptr inbounds { i32, ptr }, ptr %8, i32 0, i32 0
  %32 = extractvalue { i32, ptr } %29, 0
  store i32 %32, ptr %31, align 8
  %33 = getelementptr inbounds { i32, ptr }, ptr %8, i32 0, i32 1
  %34 = extractvalue { i32, ptr } %29, 1
  store ptr %34, ptr %33, align 8
  call void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16) %3) #4
  store i32 1, ptr %7, align 4
  br label %35

35:                                               ; preds = %30, %20
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  %36 = load { i32, ptr }, ptr %3, align 8
  ret { i32, ptr } %36

37:                                               ; preds = %25, %18, %14, %2
  %38 = landingpad { ptr, i32 }
          catch ptr null
  %39 = extractvalue { ptr, i32 } %38, 0
  call void @__clang_call_terminate(ptr %39) #5
  unreachable
}

declare i32 @accept(i32 noundef, ptr noundef, ptr noundef) #1

declare { i32, ptr } @_ZN4chen5ioctl7cloexecEib(i32 noundef, i1 noundef zeroext) #1

attributes #0 = { mustprogress 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 = { "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 = { noinline noreturn nounwind uwtable "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 nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { nounwind }
attributes #5 = { 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 = !{!"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, !12, i64 0}
!12 = !{!"vtable pointer", !8, 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"

%"class.std::error_code" = type { i32, ptr }

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4chen12basic_socket5resetEi(ptr noundef nonnull align 8 dereferenceable(72), i32 noundef) local_unnamed_addr #0 align 2

declare { i32, ptr } @_ZN4chen3sys5errorEv() local_unnamed_addr #1

; Function Attrs: noinline noreturn nounwind uwtable
declare hidden void @__clang_call_terminate(ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local { i32, ptr } @_ZN4chen12basic_socket6acceptERS0_(ptr noundef nonnull align 8 dereferenceable(72) %0, ptr noundef nonnull align 8 dereferenceable(72) %1) local_unnamed_addr #0 align 2 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::error_code", align 8
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %4, i64 40
  %6 = load ptr, ptr %5, align 8
  %7 = invoke noundef i32 %6(ptr noundef nonnull align 8 dereferenceable(28) %0)
          to label %8 unwind label %21

8:                                                ; preds = %2
  %9 = invoke i32 @accept(i32 noundef %7, ptr noundef null, ptr noundef null)
          to label %10 unwind label %21

10:                                               ; preds = %8
  %11 = icmp eq i32 %9, -1
  br i1 %11, label %12, label %17

12:                                               ; preds = %10
  %13 = invoke { i32, ptr } @_ZN4chen3sys5errorEv()
          to label %14 unwind label %21

14:                                               ; preds = %12
  %15 = extractvalue { i32, ptr } %13, 0
  %16 = extractvalue { i32, ptr } %13, 1
  br label %20

17:                                               ; preds = %10
  tail call void @_ZN4chen12basic_socket5resetEi(ptr noundef nonnull align 8 dereferenceable(72) %1, i32 noundef %9) #3
  %18 = invoke { i32, ptr } @_ZN4chen5ioctl7cloexecEib(i32 noundef %9, i1 noundef zeroext true)
          to label %19 unwind label %21

19:                                               ; preds = %17
  call void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16) %3) #3
  %.fca.0.load.pre = load i32, ptr %3, align 8
  %.fca.1.gep.phi.trans.insert = getelementptr inbounds i8, ptr %3, i64 8
  %.fca.1.load.pre = load ptr, ptr %.fca.1.gep.phi.trans.insert, align 8
  br label %20

20:                                               ; preds = %19, %14
  %.fca.1.load = phi ptr [ %.fca.1.load.pre, %19 ], [ %16, %14 ]
  %.fca.0.load = phi i32 [ %.fca.0.load.pre, %19 ], [ %15, %14 ]
  %.fca.0.insert = insertvalue { i32, ptr } poison, i32 %.fca.0.load, 0
  %.fca.1.insert = insertvalue { i32, ptr } %.fca.0.insert, ptr %.fca.1.load, 1
  ret { i32, ptr } %.fca.1.insert

21:                                               ; preds = %17, %12, %8, %2
  %22 = landingpad { ptr, i32 }
          catch ptr null
  %23 = extractvalue { ptr, i32 } %22, 0
  tail call void @__clang_call_terminate(ptr %23) #4
  unreachable
}

declare i32 @accept(i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

declare { i32, ptr } @_ZN4chen5ioctl7cloexecEib(i32 noundef, i1 noundef zeroext) local_unnamed_addr #1

attributes #0 = { mustprogress 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 = { "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 = { noinline noreturn nounwind uwtable "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 }
attributes #4 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}


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