; LLVM IR from wichue/nethello :: src/net/SocketBase.ll (ZN3chw8SockUtil9inet_portEPK8sockaddr)

; 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 = type { i16, [14 x i8] }
%struct.sockaddr_in = type { i16, i16, %struct.in_addr, [8 x i8] }
%struct.in_addr = type { i32 }
%struct.sockaddr_in6 = type { i16, i16, i32, %struct.in6_addr, i32 }
%struct.in6_addr = type { %union.anon.0 }
%union.anon.0 = type { [4 x i32] }

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i16 @_ZN3chw8SockUtil9inet_portEPK8sockaddr(ptr noundef %0) #0 align 2 {
  %2 = alloca i16, align 2
  %3 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct.sockaddr, ptr %4, i32 0, i32 0
  %6 = load i16, ptr %5, align 2, !tbaa !9
  %7 = zext i16 %6 to i32
  switch i32 %7, label %18 [
    i32 2, label %8
    i32 10, label %13
  ]

8:                                                ; preds = %1
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.sockaddr_in, ptr %9, i32 0, i32 1
  %11 = load i16, ptr %10, align 2, !tbaa !12
  %12 = call noundef zeroext i16 @_ZL10__bswap_16t(i16 noundef zeroext %11)
  store i16 %12, ptr %2, align 2
  br label %19

13:                                               ; preds = %1
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.sockaddr_in6, ptr %14, i32 0, i32 1
  %16 = load i16, ptr %15, align 2, !tbaa !16
  %17 = call noundef zeroext i16 @_ZL10__bswap_16t(i16 noundef zeroext %16)
  store i16 %17, ptr %2, align 2
  br label %19

18:                                               ; preds = %1
  store i16 0, ptr %2, align 2
  br label %19

19:                                               ; preds = %18, %13, %8
  %20 = load i16, ptr %2, align 2
  ret i16 %20
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare hidden noundef zeroext i16 @_ZL10__bswap_16t(i16 noundef zeroext) #1

attributes #0 = { 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 #1 = { inlinehint 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" }

!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, !11, i64 0}
!10 = !{!"_ZTS8sockaddr", !11, i64 0, !7, i64 2}
!11 = !{!"short", !7, i64 0}
!12 = !{!13, !11, i64 2}
!13 = !{!"_ZTS11sockaddr_in", !11, i64 0, !11, i64 2, !14, i64 4, !7, i64 8}
!14 = !{!"_ZTS7in_addr", !15, i64 0}
!15 = !{!"int", !7, i64 0}
!16 = !{!17, !11, i64 2}
!17 = !{!"_ZTS12sockaddr_in6", !11, i64 0, !11, i64 2, !15, i64 4, !18, i64 8, !15, i64 24}
!18 = !{!"_ZTS8in6_addr", !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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i16 @_ZN3chw8SockUtil9inet_portEPK8sockaddr(ptr nocapture noundef readonly %0) local_unnamed_addr #0 align 2 {
  %2 = load i16, ptr %0, align 2, !tbaa !5
  switch i16 %2, label %6 [
    i16 2, label %.sink.split
    i16 10, label %.sink.split
  ]

.sink.split:                                      ; preds = %1, %1
  %3 = getelementptr inbounds i8, ptr %0, i64 2
  %4 = load i16, ptr %3, align 2, !tbaa !10
  %5 = tail call noundef zeroext i16 @_ZL10__bswap_16t(i16 noundef zeroext %4)
  br label %6

6:                                                ; preds = %.sink.split, %1
  %.0 = phi i16 [ 0, %1 ], [ %5, %.sink.split ]
  ret i16 %.0
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare hidden noundef zeroext i16 @_ZL10__bswap_16t(i16 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 = { inlinehint 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" }

!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 = !{!"_ZTS8sockaddr", !7, i64 0, !8, i64 2}
!7 = !{!"short", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!7, !7, i64 0}


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