; LLVM IR from pupnp/pupnp :: upnp/src/threadutil (FreeList)

; 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.FREELIST = type { ptr, i64, i32, i32 }
%struct.FREELISTNODE = type { ptr }

@.str = external hidden unnamed_addr constant [18 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [76 x i8], align 1
@__PRETTY_FUNCTION__.FreeListFree = external hidden unnamed_addr constant [37 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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

10:                                               ; preds = %2
  br label %12

11:                                               ; preds = %2
  call void @__assert_fail(ptr noundef @.str, ptr noundef @.str.1, i32 noundef 76, ptr noundef @__PRETTY_FUNCTION__.FreeListFree) #5
  unreachable

12:                                               ; preds = %10
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = icmp eq ptr %13, null
  br i1 %14, label %15, label %16

15:                                               ; preds = %12
  store i32 22, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %45

16:                                               ; preds = %12
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = icmp ne ptr %17, null
  br i1 %18, label %19, label %42

19:                                               ; preds = %16
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.FREELIST, ptr %20, i32 0, i32 3
  %22 = load i32, ptr %21, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.FREELIST, ptr %24, i32 0, i32 2
  %26 = load i32, ptr %25, align 8, !tbaa !13
  %27 = icmp slt i32 %23, %26
  br i1 %27, label %28, label %42

28:                                               ; preds = %19
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.FREELIST, ptr %29, i32 0, i32 3
  %31 = load i32, ptr %30, align 4, !tbaa !9
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %30, align 4, !tbaa !9
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %33, ptr %6, align 8, !tbaa !5
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.FREELIST, ptr %34, i32 0, i32 0
  %36 = load ptr, ptr %35, align 8, !tbaa !14
  %37 = load ptr, ptr %6, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.FREELISTNODE, ptr %37, i32 0, i32 0
  store ptr %36, ptr %38, align 8, !tbaa !15
  %39 = load ptr, ptr %6, align 8, !tbaa !5
  %40 = load ptr, ptr %4, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.FREELIST, ptr %40, i32 0, i32 0
  store ptr %39, ptr %41, align 8, !tbaa !14
  br label %44

42:                                               ; preds = %19, %16
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  call void @free(ptr noundef %43) #4
  br label %44

44:                                               ; preds = %42, %28
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %45

45:                                               ; preds = %44, %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  %46 = load i32, ptr %3, align 4
  ret i32 %46
}

; Function Attrs: nounwind
declare void @free(ptr noundef) #3

attributes #0 = { noreturn 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 "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 = { nounwind }
attributes #5 = { noreturn 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, !12, i64 20}
!10 = !{!"FREELIST", !6, i64 0, !11, i64 8, !12, i64 16, !12, i64 20}
!11 = !{!"long", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!10, !12, i64 16}
!14 = !{!10, !6, i64 0}
!15 = !{!16, !6, i64 0}
!16 = !{!"FREELISTNODE", !6, 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"

@.str = external hidden unnamed_addr constant [18 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [76 x i8], align 1
@__PRETTY_FUNCTION__.FreeListFree = external hidden unnamed_addr constant [37 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @FreeListFree(ptr noundef %0, ptr noundef %1) local_unnamed_addr #1 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %3, label %4

3:                                                ; preds = %2
  tail call void @__assert_fail(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 76, ptr noundef nonnull @__PRETTY_FUNCTION__.FreeListFree) #3
  unreachable

4:                                                ; preds = %2
  %.not15 = icmp eq ptr %1, null
  br i1 %.not15, label %14, label %5

5:                                                ; preds = %4
  %6 = getelementptr inbounds i8, ptr %0, i64 20
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = add nsw i32 %7, 1
  %9 = getelementptr inbounds i8, ptr %0, i64 16
  %10 = load i32, ptr %9, align 8, !tbaa !12
  %11 = icmp slt i32 %8, %10
  br i1 %11, label %12, label %14

12:                                               ; preds = %5
  store i32 %8, ptr %6, align 4, !tbaa !5
  %13 = load ptr, ptr %0, align 8, !tbaa !13
  store ptr %13, ptr %1, align 8, !tbaa !14
  store ptr %1, ptr %0, align 8, !tbaa !13
  br label %15

14:                                               ; preds = %5, %4
  tail call void @free(ptr noundef %1) #4
  br label %15

15:                                               ; preds = %12, %14
  ret i32 0
}

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #2

attributes #0 = { noreturn 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 #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 = { 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 #3 = { noreturn nounwind }
attributes #4 = { 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, !11, i64 20}
!6 = !{!"FREELIST", !7, i64 0, !10, i64 8, !11, i64 16, !11, i64 20}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"int", !8, i64 0}
!12 = !{!6, !11, i64 16}
!13 = !{!6, !7, i64 0}
!14 = !{!15, !7, i64 0}
!15 = !{!"FREELISTNODE", !7, i64 0}


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