; LLVM IR from attractivechaos/klib :: kson (kson_destroy)

; 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.kson_t = type { i64, ptr }
%struct.kson_node_s = type { i64, ptr, %union.anon }
%union.anon = 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
declare void @free(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @kson_destroy(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = icmp eq ptr %5, null
  br i1 %6, label %7, label %8

7:                                                ; preds = %1
  store i32 1, ptr %4, align 4
  br label %38

8:                                                ; preds = %1
  store i64 0, ptr %3, align 8, !tbaa !9
  br label %9

9:                                                ; preds = %30, %8
  %10 = load i64, ptr %3, align 8, !tbaa !9
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.kson_t, ptr %11, i32 0, i32 0
  %13 = load i64, ptr %12, align 8, !tbaa !11
  %14 = icmp slt i64 %10, %13
  br i1 %14, label %15, label %33

15:                                               ; preds = %9
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.kson_t, ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  %19 = load i64, ptr %3, align 8, !tbaa !9
  %20 = getelementptr inbounds %struct.kson_node_s, ptr %18, i64 %19
  %21 = getelementptr inbounds %struct.kson_node_s, ptr %20, i32 0, i32 1
  %22 = load ptr, ptr %21, align 8, !tbaa !14
  call void @free(ptr noundef %22) #3
  %23 = load ptr, ptr %2, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.kson_t, ptr %23, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !13
  %26 = load i64, ptr %3, align 8, !tbaa !9
  %27 = getelementptr inbounds %struct.kson_node_s, ptr %25, i64 %26
  %28 = getelementptr inbounds %struct.kson_node_s, ptr %27, i32 0, i32 2
  %29 = load ptr, ptr %28, align 8, !tbaa !17
  call void @free(ptr noundef %29) #3
  br label %30

30:                                               ; preds = %15
  %31 = load i64, ptr %3, align 8, !tbaa !9
  %32 = add nsw i64 %31, 1
  store i64 %32, ptr %3, align 8, !tbaa !9
  br label %9, !llvm.loop !18

33:                                               ; preds = %9
  %34 = load ptr, ptr %2, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.kson_t, ptr %34, i32 0, i32 1
  %36 = load ptr, ptr %35, align 8, !tbaa !13
  call void @free(ptr noundef %36) #3
  %37 = load ptr, ptr %2, align 8, !tbaa !5
  call void @free(ptr noundef %37) #3
  store i32 0, ptr %4, align 4
  br label %38

38:                                               ; preds = %33, %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  %39 = load i32, ptr %4, align 4
  switch i32 %39, label %41 [
    i32 0, label %40
    i32 1, label %40
  ]

40:                                               ; preds = %38, %38
  ret void

41:                                               ; preds = %38
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 }

!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, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"", !10, i64 0, !6, i64 8}
!13 = !{!12, !6, i64 8}
!14 = !{!15, !6, i64 8}
!15 = !{!"kson_node_s", !16, i64 0, !16, i64 0, !6, i64 8, !7, i64 16}
!16 = !{!"long long", !7, i64 0}
!17 = !{!7, !7, i64 0}
!18 = distinct !{!18, !19}
!19 = !{!"llvm.loop.mustprogress"}


; 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"

%struct.kson_node_s = type { i64, ptr, %union.anon }
%union.anon = type { ptr }

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @kson_destroy(ptr noundef %0) local_unnamed_addr #1 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %18, label %.preheader

.preheader:                                       ; preds = %1
  %3 = load i64, ptr %0, align 8, !tbaa !5
  %4 = icmp sgt i64 %3, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  br label %6

6:                                                ; preds = %.lr.ph, %6
  %.010 = phi i64 [ 0, %.lr.ph ], [ %13, %6 ]
  %7 = load ptr, ptr %5, align 8, !tbaa !11
  %8 = getelementptr inbounds %struct.kson_node_s, ptr %7, i64 %.010, i32 1
  %9 = load ptr, ptr %8, align 8, !tbaa !12
  tail call void @free(ptr noundef %9) #2
  %10 = load ptr, ptr %5, align 8, !tbaa !11
  %11 = getelementptr inbounds %struct.kson_node_s, ptr %10, i64 %.010, i32 2
  %12 = load ptr, ptr %11, align 8, !tbaa !15
  tail call void @free(ptr noundef %12) #2
  %13 = add nuw nsw i64 %.010, 1
  %14 = load i64, ptr %0, align 8, !tbaa !5
  %15 = icmp slt i64 %13, %14
  br i1 %15, label %6, label %._crit_edge, !llvm.loop !16

._crit_edge:                                      ; preds = %6, %.preheader
  %16 = getelementptr inbounds i8, ptr %0, i64 8
  %17 = load ptr, ptr %16, align 8, !tbaa !11
  tail call void @free(ptr noundef %17) #2
  tail call void @free(ptr noundef nonnull %0) #2
  br label %18

18:                                               ; preds = %1, %._crit_edge
  ret void
}

attributes #0 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { 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, !7, i64 0}
!6 = !{!"", !7, i64 0, !10, i64 8}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!13, !10, i64 8}
!13 = !{!"kson_node_s", !14, i64 0, !14, i64 0, !10, i64 8, !8, i64 16}
!14 = !{!"long long", !8, i64 0}
!15 = !{!8, !8, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}


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