; LLVM IR from godzilla-foundation/godzilla-community :: core/deps/nanomsg-1.1.5/src/utils (queue)

; 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.nn_queue = type { ptr, ptr }
%struct.nn_queue_item = type { ptr }

; 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: nounwind uwtable
define dso_local ptr @nn_queue_pop(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.nn_queue, ptr %6, i32 0, i32 0
  %8 = load ptr, ptr %7, align 8, !tbaa !9
  %9 = icmp ne ptr %8, null
  br i1 %9, label %11, label %10

10:                                               ; preds = %1
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %31

11:                                               ; preds = %1
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.nn_queue, ptr %12, i32 0, i32 0
  %14 = load ptr, ptr %13, align 8, !tbaa !9
  store ptr %14, ptr %4, align 8, !tbaa !5
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.nn_queue_item, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !11
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.nn_queue, ptr %18, i32 0, i32 0
  store ptr %17, ptr %19, align 8, !tbaa !9
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.nn_queue, ptr %20, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8, !tbaa !9
  %23 = icmp ne ptr %22, null
  br i1 %23, label %27, label %24

24:                                               ; preds = %11
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.nn_queue, ptr %25, i32 0, i32 1
  store ptr null, ptr %26, align 8, !tbaa !13
  br label %27

27:                                               ; preds = %24, %11
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.nn_queue_item, ptr %28, i32 0, i32 0
  store ptr inttoptr (i64 -1 to ptr), ptr %29, align 8, !tbaa !11
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %30, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %31

31:                                               ; preds = %27, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %32 = load ptr, ptr %2, align 8
  ret ptr %32
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"nn_queue", !6, i64 0, !6, i64 8}
!11 = !{!12, !6, i64 0}
!12 = !{!"nn_queue_item", !6, i64 0}
!13 = !{!10, !6, i64 8}


; 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 nofree norecurse nosync nounwind willreturn memory(readwrite, inaccessiblemem: none) uwtable
define dso_local ptr @nn_queue_pop(ptr nocapture noundef %0) local_unnamed_addr #0 {
  %2 = load ptr, ptr %0, align 8, !tbaa !5
  %.not = icmp eq ptr %2, null
  br i1 %.not, label %8, label %3

3:                                                ; preds = %1
  %4 = load ptr, ptr %2, align 8, !tbaa !10
  store ptr %4, ptr %0, align 8, !tbaa !5
  %.not10 = icmp eq ptr %4, null
  br i1 %.not10, label %5, label %7

5:                                                ; preds = %3
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  store ptr null, ptr %6, align 8, !tbaa !12
  br label %7

7:                                                ; preds = %5, %3
  store ptr inttoptr (i64 -1 to ptr), ptr %2, align 8, !tbaa !10
  br label %8

8:                                                ; preds = %1, %7
  ret ptr %2
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, inaccessiblemem: 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" }

!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 = !{!"nn_queue", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !7, i64 0}
!11 = !{!"nn_queue_item", !7, i64 0}
!12 = !{!6, !7, i64 8}


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