; LLVM IR from clibs/clib :: deps/list (list)

; 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.list_t = type { ptr, ptr, i32, ptr, ptr }
%struct.list_node = type { ptr, ptr, 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 @list_lpop(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.list_t, ptr %5, i32 0, i32 2
  %7 = load i32, ptr %6, align 8, !tbaa !9
  %8 = icmp ne i32 %7, 0
  br i1 %8, label %10, label %9

9:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  br label %37

10:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.list_t, ptr %11, i32 0, i32 0
  %13 = load ptr, ptr %12, align 8, !tbaa !12
  store ptr %13, ptr %4, align 8, !tbaa !5
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.list_t, ptr %14, i32 0, i32 2
  %16 = load i32, ptr %15, align 8, !tbaa !9
  %17 = add i32 %16, -1
  store i32 %17, ptr %15, align 8, !tbaa !9
  %18 = icmp ne i32 %17, 0
  br i1 %18, label %19, label %26

19:                                               ; preds = %10
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.list_node, ptr %20, i32 0, i32 1
  %22 = load ptr, ptr %21, align 8, !tbaa !13
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.list_t, ptr %23, i32 0, i32 0
  store ptr %22, ptr %24, align 8, !tbaa !12
  %25 = getelementptr inbounds %struct.list_node, ptr %22, i32 0, i32 0
  store ptr null, ptr %25, align 8, !tbaa !15
  br label %31

26:                                               ; preds = %10
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.list_t, ptr %27, i32 0, i32 1
  store ptr null, ptr %28, align 8, !tbaa !16
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.list_t, ptr %29, i32 0, i32 0
  store ptr null, ptr %30, align 8, !tbaa !12
  br label %31

31:                                               ; preds = %26, %19
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.list_node, ptr %32, i32 0, i32 0
  store ptr null, ptr %33, align 8, !tbaa !15
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.list_node, ptr %34, i32 0, i32 1
  store ptr null, ptr %35, align 8, !tbaa !13
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %36, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %37

37:                                               ; preds = %31, %9
  %38 = load ptr, ptr %2, align 8
  ret ptr %38
}

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, !11, i64 16}
!10 = !{!"", !6, i64 0, !6, i64 8, !11, i64 16, !6, i64 24, !6, i64 32}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 0}
!13 = !{!14, !6, i64 8}
!14 = !{!"list_node", !6, i64 0, !6, i64 8, !6, i64 16}
!15 = !{!14, !6, i64 0}
!16 = !{!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 @list_lpop(ptr nocapture noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = load i32, ptr %2, align 8, !tbaa !5
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %13, label %4

4:                                                ; preds = %1
  %5 = load ptr, ptr %0, align 8, !tbaa !11
  %6 = add i32 %3, -1
  store i32 %6, ptr %2, align 8, !tbaa !5
  %.not12 = icmp eq i32 %6, 0
  br i1 %.not12, label %10, label %7

7:                                                ; preds = %4
  %8 = getelementptr inbounds i8, ptr %5, i64 8
  %9 = load ptr, ptr %8, align 8, !tbaa !12
  br label %12

10:                                               ; preds = %4
  %11 = getelementptr inbounds i8, ptr %0, i64 8
  br label %12

12:                                               ; preds = %10, %7
  %.sink13 = phi ptr [ %11, %10 ], [ %9, %7 ]
  %.sink = phi ptr [ null, %10 ], [ %9, %7 ]
  store ptr null, ptr %.sink13, align 8, !tbaa !14
  store ptr %.sink, ptr %0, align 8
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %5, i8 0, i64 16, i1 false)
  br label %13

13:                                               ; preds = %1, %12
  %.0 = phi ptr [ %5, %12 ], [ null, %1 ]
  ret ptr %.0
}

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

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" }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }

!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, !10, i64 16}
!6 = !{!"", !7, i64 0, !7, i64 8, !10, i64 16, !7, i64 24, !7, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!13, !7, i64 8}
!13 = !{!"list_node", !7, i64 0, !7, i64 8, !7, i64 16}
!14 = !{!7, !7, i64 0}


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