; LLVM IR from chensoft/libsocket :: src/ip/ip_version.ll (ZNK4chen11ip_version67networkEv)

; 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.chen::ip_version6" = type { %"class.chen::ip_version", %"struct.std::array", i32 }
%"class.chen::ip_version" = type { i8 }
%"struct.std::array" = type { [16 x i8] }

; 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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt5arrayIhLm16EEixEm(ptr noundef nonnull align 1 dereferenceable(16), i64 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local { i64, i64 } @_ZNK4chen11ip_version67netmaskEv(ptr noundef nonnull align 4 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt5arrayIhLm16EEixEm(ptr noundef nonnull align 1 dereferenceable(16), i64 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZNK4chen11ip_version67networkEv(ptr dead_on_unwind noalias writable sret(%"class.chen::ip_version6") align 4 %0, ptr noundef nonnull align 4 dereferenceable(24) %1) #3 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca [16 x i8], align 16
  %5 = alloca %"struct.std::array", align 1
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  store ptr %1, ptr %3, align 8, !tbaa !5
  %8 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr %4) #5
  call void @llvm.memset.p0.i64(ptr align 16 %4, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 16, ptr %5) #5
  %9 = call { i64, i64 } @_ZNK4chen11ip_version67netmaskEv(ptr noundef nonnull align 4 dereferenceable(24) %8)
  %10 = getelementptr inbounds %"struct.std::array", ptr %5, i32 0, i32 0
  %11 = getelementptr inbounds { i64, i64 }, ptr %10, i32 0, i32 0
  %12 = extractvalue { i64, i64 } %9, 0
  store i64 %12, ptr %11, align 1
  %13 = getelementptr inbounds { i64, i64 }, ptr %10, i32 0, i32 1
  %14 = extractvalue { i64, i64 } %9, 1
  store i64 %14, ptr %13, align 1
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  store i64 0, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #5
  %15 = call noundef i64 @_ZNKSt5arrayIhLm16EE4sizeEv(ptr noundef nonnull align 1 dereferenceable(16) %5) #6
  store i64 %15, ptr %7, align 8, !tbaa !9
  br label %16

16:                                               ; preds = %35, %2
  %17 = load i64, ptr %6, align 8, !tbaa !9
  %18 = load i64, ptr %7, align 8, !tbaa !9
  %19 = icmp ult i64 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br label %38

21:                                               ; preds = %16
  %22 = getelementptr inbounds %"class.chen::ip_version6", ptr %8, i32 0, i32 1
  %23 = load i64, ptr %6, align 8, !tbaa !9
  %24 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt5arrayIhLm16EEixEm(ptr noundef nonnull align 1 dereferenceable(16) %22, i64 noundef %23) #5
  %25 = load i8, ptr %24, align 1, !tbaa !11
  %26 = zext i8 %25 to i32
  %27 = load i64, ptr %6, align 8, !tbaa !9
  %28 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt5arrayIhLm16EEixEm(ptr noundef nonnull align 1 dereferenceable(16) %5, i64 noundef %27) #5
  %29 = load i8, ptr %28, align 1, !tbaa !11
  %30 = zext i8 %29 to i32
  %31 = and i32 %26, %30
  %32 = trunc i32 %31 to i8
  %33 = load i64, ptr %6, align 8, !tbaa !9
  %34 = getelementptr inbounds [16 x i8], ptr %4, i64 0, i64 %33
  store i8 %32, ptr %34, align 1, !tbaa !11
  br label %35

35:                                               ; preds = %21
  %36 = load i64, ptr %6, align 8, !tbaa !9
  %37 = add i64 %36, 1
  store i64 %37, ptr %6, align 8, !tbaa !9
  br label %16, !llvm.loop !12

38:                                               ; preds = %20
  %39 = getelementptr inbounds [16 x i8], ptr %4, i64 0, i64 0
  %40 = getelementptr inbounds %"class.chen::ip_version", ptr %8, i32 0, i32 0
  %41 = load i8, ptr %40, align 4, !tbaa !14
  %42 = getelementptr inbounds %"class.chen::ip_version6", ptr %8, i32 0, i32 2
  %43 = load i32, ptr %42, align 4, !tbaa !16
  call void @_ZN4chen11ip_version6C1EPKhhj(ptr noundef nonnull align 4 dereferenceable(24) %0, ptr noundef %39, i8 noundef zeroext %41, i32 noundef %43)
  call void @llvm.lifetime.end.p0(i64 16, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 16, ptr %4) #5
  ret void
}

; Function Attrs: mustprogress nounwind willreturn memory(none) uwtable
declare dso_local noundef i64 @_ZNKSt5arrayIhLm16EE4sizeEv(ptr noundef nonnull align 1 dereferenceable(16)) #4 align 2

declare void @_ZN4chen11ip_version6C1EPKhhj(ptr, ptr, i8, i32)

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = { 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 = { mustprogress nounwind willreturn memory(none) 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 = { nounwind }
attributes #6 = { 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 = !{!"long", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!15, !7, i64 0}
!15 = !{!"_ZTSN4chen10ip_versionE", !7, i64 0}
!16 = !{!17, !19, i64 20}
!17 = !{!"_ZTSN4chen11ip_version6E", !15, i64 0, !18, i64 1, !19, i64 20}
!18 = !{!"_ZTSSt5arrayIhLm16EE", !7, i64 0}
!19 = !{!"int", !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"

%"class.chen::ip_version6" = type { %"class.chen::ip_version", %"struct.std::array", i32 }
%"class.chen::ip_version" = type { i8 }
%"struct.std::array" = type { [16 x i8] }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt5arrayIhLm16EEixEm(ptr noundef nonnull align 1 dereferenceable(16), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local { i64, i64 } @_ZNK4chen11ip_version67netmaskEv(ptr noundef nonnull align 4 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt5arrayIhLm16EEixEm(ptr noundef nonnull align 1 dereferenceable(16), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZNK4chen11ip_version67networkEv(ptr dead_on_unwind noalias writable sret(%"class.chen::ip_version6") align 4 %0, ptr noundef nonnull align 4 dereferenceable(24) %1) local_unnamed_addr #3 align 2 {
  %3 = alloca [16 x i8], align 16
  %4 = alloca %"struct.std::array", align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #5
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(16) %3, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %4) #5
  %5 = tail call { i64, i64 } @_ZNK4chen11ip_version67netmaskEv(ptr noundef nonnull align 4 dereferenceable(24) %1)
  %6 = extractvalue { i64, i64 } %5, 0
  store i64 %6, ptr %4, align 8
  %7 = getelementptr inbounds i8, ptr %4, i64 8
  %8 = extractvalue { i64, i64 } %5, 1
  store i64 %8, ptr %7, align 8
  %9 = call noundef i64 @_ZNKSt5arrayIhLm16EE4sizeEv(ptr noundef nonnull align 1 dereferenceable(16) %4) #6
  %.not = icmp eq i64 %9, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %10 = getelementptr inbounds i8, ptr %1, i64 1
  br label %14

._crit_edge:                                      ; preds = %14, %2
  %11 = load i8, ptr %1, align 4, !tbaa !5
  %12 = getelementptr inbounds i8, ptr %1, i64 20
  %13 = load i32, ptr %12, align 4, !tbaa !9
  call void @_ZN4chen11ip_version6C1EPKhhj(ptr noundef nonnull align 4 dereferenceable(24) %0, ptr noundef nonnull %3, i8 noundef zeroext %11, i32 noundef %13)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %4) #5
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #5
  ret void

14:                                               ; preds = %.lr.ph, %14
  %.06 = phi i64 [ 0, %.lr.ph ], [ %21, %14 ]
  %15 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNKSt5arrayIhLm16EEixEm(ptr noundef nonnull align 1 dereferenceable(16) %10, i64 noundef %.06) #5
  %16 = load i8, ptr %15, align 1, !tbaa !13
  %17 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt5arrayIhLm16EEixEm(ptr noundef nonnull align 1 dereferenceable(16) %4, i64 noundef %.06) #5
  %18 = load i8, ptr %17, align 1, !tbaa !13
  %19 = and i8 %18, %16
  %20 = getelementptr inbounds [16 x i8], ptr %3, i64 0, i64 %.06
  store i8 %19, ptr %20, align 1, !tbaa !13
  %21 = add nuw i64 %.06, 1
  %exitcond.not = icmp eq i64 %21, %9
  br i1 %exitcond.not, label %._crit_edge, label %14, !llvm.loop !14
}

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none) uwtable
declare dso_local noundef i64 @_ZNKSt5arrayIhLm16EE4sizeEv(ptr noundef nonnull align 1 dereferenceable(16)) local_unnamed_addr #4 align 2

declare void @_ZN4chen11ip_version6C1EPKhhj(ptr, ptr, i8, i32) local_unnamed_addr

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
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 = { 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 = { mustprogress nofree nosync nounwind willreturn memory(none) 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 = { nounwind }
attributes #6 = { 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 0}
!6 = !{!"_ZTSN4chen10ip_versionE", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !12, i64 20}
!10 = !{!"_ZTSN4chen11ip_version6E", !6, i64 0, !11, i64 1, !12, i64 20}
!11 = !{!"_ZTSSt5arrayIhLm16EE", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass