; LLVM IR from chensoft/libsocket :: src/base/basic_socket.ll (ZN4chen12basic_socket6listenEi)

; 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(...)

declare { i32, ptr } @_ZN4chen3sys5errorEv() #0

; Function Attrs: noinline noreturn nounwind uwtable
declare hidden void @__clang_call_terminate(ptr noundef) #1

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

; Function Attrs: mustprogress nounwind uwtable
define dso_local { i32, ptr } @_ZN4chen12basic_socket6listenEi(ptr noundef nonnull align 8 dereferenceable(72) %0, i32 noundef %1) #2 align 2 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::error_code", align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %6 = load ptr, ptr %4, align 8
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %8 = getelementptr inbounds ptr, ptr %7, i64 5
  %9 = load ptr, ptr %8, align 8
  %10 = invoke noundef i32 %9(ptr noundef nonnull align 8 dereferenceable(28) %6)
          to label %11 unwind label %25

11:                                               ; preds = %2
  %12 = load i32, ptr %5, align 4, !tbaa !9
  %13 = call i32 @listen(i32 noundef %10, i32 noundef %12) #4
  %14 = icmp ne i32 %13, 0
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16) %3) #4
  br label %23

16:                                               ; preds = %11
  %17 = invoke { i32, ptr } @_ZN4chen3sys5errorEv()
          to label %18 unwind label %25

18:                                               ; preds = %16
  %19 = getelementptr inbounds { i32, ptr }, ptr %3, i32 0, i32 0
  %20 = extractvalue { i32, ptr } %17, 0
  store i32 %20, ptr %19, align 8
  %21 = getelementptr inbounds { i32, ptr }, ptr %3, i32 0, i32 1
  %22 = extractvalue { i32, ptr } %17, 1
  store ptr %22, ptr %21, align 8
  br label %23

23:                                               ; preds = %18, %15
  %24 = load { i32, ptr }, ptr %3, align 8
  ret { i32, ptr } %24

25:                                               ; preds = %16, %2
  %26 = landingpad { ptr, i32 }
          catch ptr null
  %27 = extractvalue { ptr, i32 } %26, 0
  call void @__clang_call_terminate(ptr %27) #5
  unreachable
}

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

attributes #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 = { 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 #2 = { 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 #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 = { 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(...)

declare { i32, ptr } @_ZN4chen3sys5errorEv() local_unnamed_addr #0

; Function Attrs: noinline noreturn nounwind uwtable
declare hidden void @__clang_call_terminate(ptr noundef) local_unnamed_addr #1

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

; Function Attrs: mustprogress nounwind uwtable
define dso_local { i32, ptr } @_ZN4chen12basic_socket6listenEi(ptr noundef nonnull align 8 dereferenceable(72) %0, i32 noundef %1) local_unnamed_addr #2 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 %17

8:                                                ; preds = %2
  %9 = tail call i32 @listen(i32 noundef %7, i32 noundef %1) #4
  %.not = icmp eq i32 %9, 0
  br i1 %.not, label %10, label %11

10:                                               ; preds = %8
  call void @_ZNSt10error_codeC2Ev(ptr noundef nonnull align 8 dereferenceable(16) %3) #4
  %.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 %16

11:                                               ; preds = %8
  %12 = invoke { i32, ptr } @_ZN4chen3sys5errorEv()
          to label %13 unwind label %17

13:                                               ; preds = %11
  %14 = extractvalue { i32, ptr } %12, 0
  %15 = extractvalue { i32, ptr } %12, 1
  br label %16

16:                                               ; preds = %13, %10
  %.fca.1.load = phi ptr [ %15, %13 ], [ %.fca.1.load.pre, %10 ]
  %.fca.0.load = phi i32 [ %14, %13 ], [ %.fca.0.load.pre, %10 ]
  %.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

17:                                               ; preds = %11, %2
  %18 = landingpad { ptr, i32 }
          catch ptr null
  %19 = extractvalue { ptr, i32 } %18, 0
  tail call void @__clang_call_terminate(ptr %19) #5
  unreachable
}

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

attributes #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 = { 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 #2 = { 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 #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 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}


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