; 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__.FreeListAlloc = external hidden unnamed_addr constant [32 x i8], align 1

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

; Function Attrs: nounwind uwtable
define dso_local ptr @FreeListAlloc(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) #4
  store ptr null, ptr %4, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = icmp ne ptr %6, null
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  br label %10

9:                                                ; preds = %1
  call void @__assert_fail(ptr noundef @.str, ptr noundef @.str.1, i32 noundef 56, ptr noundef @__PRETTY_FUNCTION__.FreeListAlloc) #5
  unreachable

10:                                               ; preds = %8
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = icmp eq ptr %11, null
  br i1 %12, label %13, label %14

13:                                               ; preds = %10
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %41

14:                                               ; preds = %10
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.FREELIST, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !9
  %18 = icmp ne ptr %17, null
  br i1 %18, label %19, label %34

19:                                               ; preds = %14
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.FREELIST, ptr %20, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8, !tbaa !9
  store ptr %22, ptr %4, align 8, !tbaa !5
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.FREELIST, ptr %23, i32 0, i32 0
  %25 = load ptr, ptr %24, align 8, !tbaa !9
  %26 = getelementptr inbounds %struct.FREELISTNODE, ptr %25, i32 0, i32 0
  %27 = load ptr, ptr %26, align 8, !tbaa !13
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.FREELIST, ptr %28, i32 0, i32 0
  store ptr %27, ptr %29, align 8, !tbaa !9
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.FREELIST, ptr %30, i32 0, i32 3
  %32 = load i32, ptr %31, align 4, !tbaa !15
  %33 = add nsw i32 %32, -1
  store i32 %33, ptr %31, align 4, !tbaa !15
  br label %39

34:                                               ; preds = %14
  %35 = load ptr, ptr %3, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.FREELIST, ptr %35, i32 0, i32 1
  %37 = load i64, ptr %36, align 8, !tbaa !16
  %38 = call noalias ptr @malloc(i64 noundef %37) #6
  store ptr %38, ptr %4, align 8, !tbaa !5
  br label %39

39:                                               ; preds = %34, %19
  %40 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %40, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %41

41:                                               ; preds = %39, %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  %42 = load ptr, ptr %2, align 8
  ret ptr %42
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nounwind allocsize(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 #4 = { nounwind }
attributes #5 = { noreturn nounwind }
attributes #6 = { nounwind allocsize(0) }

!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 = !{!"FREELIST", !6, i64 0, !11, i64 8, !12, i64 16, !12, i64 20}
!11 = !{!"long", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !6, i64 0}
!14 = !{!"FREELISTNODE", !6, i64 0}
!15 = !{!10, !12, i64 20}
!16 = !{!10, !11, 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"

@.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__.FreeListAlloc = external hidden unnamed_addr constant [32 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 ptr @FreeListAlloc(ptr noundef %0) local_unnamed_addr #1 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %2, label %3

2:                                                ; preds = %1
  tail call void @__assert_fail(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 56, ptr noundef nonnull @__PRETTY_FUNCTION__.FreeListAlloc) #3
  unreachable

3:                                                ; preds = %1
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %.not13 = icmp eq ptr %4, null
  br i1 %.not13, label %10, label %5

5:                                                ; preds = %3
  %6 = load ptr, ptr %4, align 8, !tbaa !12
  store ptr %6, ptr %0, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %0, i64 20
  %8 = load i32, ptr %7, align 4, !tbaa !14
  %9 = add nsw i32 %8, -1
  store i32 %9, ptr %7, align 4, !tbaa !14
  br label %14

10:                                               ; preds = %3
  %11 = getelementptr inbounds i8, ptr %0, i64 8
  %12 = load i64, ptr %11, align 8, !tbaa !15
  %13 = tail call noalias ptr @malloc(i64 noundef %12) #4
  br label %14

14:                                               ; preds = %5, %10
  %.0 = phi ptr [ %4, %5 ], [ %13, %10 ]
  ret ptr %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(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 allocsize(0) }

!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 = !{!"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 = !{!13, !7, i64 0}
!13 = !{!"FREELISTNODE", !7, i64 0}
!14 = !{!6, !11, i64 20}
!15 = !{!6, !10, i64 8}


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