; LLVM IR from gokcehan/pns :: generators/netgen-bcjl-patched (index)

; 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.index_header = type { i64, i64, i64, %union.anon, %union.anon.0 }
%union.anon = type { i64 }
%union.anon.0 = type { ptr }

@index_headers = external hidden global ptr, align 8
@active_handles = external hidden global i32, align 4

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

; 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 void @free_index_list(i32 noundef %0) #2 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = icmp slt i32 %5, 0
  br i1 %6, label %11, label %7

7:                                                ; preds = %1
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = load i32, ptr @active_handles, align 4, !tbaa !5
  %10 = icmp sge i32 %8, %9
  br i1 %10, label %11, label %12

11:                                               ; preds = %7, %1
  store i32 1, ptr %4, align 4
  br label %27

12:                                               ; preds = %7
  %13 = load ptr, ptr @index_headers, align 8, !tbaa !9
  %14 = load i32, ptr %2, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds %struct.index_header, ptr %13, i64 %15
  store ptr %16, ptr %3, align 8, !tbaa !9
  %17 = load ptr, ptr %3, align 8, !tbaa !9
  %18 = getelementptr inbounds %struct.index_header, ptr %17, i32 0, i32 4
  %19 = load ptr, ptr %18, align 8, !tbaa !11
  %20 = icmp ne ptr %19, null
  br i1 %20, label %21, label %25

21:                                               ; preds = %12
  %22 = load ptr, ptr %3, align 8, !tbaa !9
  %23 = getelementptr inbounds %struct.index_header, ptr %22, i32 0, i32 4
  %24 = load ptr, ptr %23, align 8, !tbaa !11
  call void @free(ptr noundef %24) #4
  br label %25

25:                                               ; preds = %21, %12
  %26 = load ptr, ptr %3, align 8, !tbaa !9
  call void @llvm.memset.p0.i64(ptr align 1 %26, i8 0, i64 40, i1 false)
  store i32 0, ptr %4, align 4
  br label %27

27:                                               ; preds = %25, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  %28 = load i32, ptr %4, align 4
  switch i32 %28, label %30 [
    i32 0, label %29
    i32 1, label %29
  ]

29:                                               ; preds = %27, %27
  ret void

30:                                               ; preds = %27
  unreachable
}

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

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

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

%struct.index_header = type { i64, i64, i64, %union.anon, %union.anon.0 }
%union.anon = type { i64 }
%union.anon.0 = type { ptr }

@index_headers = external hidden local_unnamed_addr global ptr, align 8
@active_handles = external hidden local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

; Function Attrs: mustprogress nounwind willreturn uwtable
define dso_local void @free_index_list(i32 noundef %0) local_unnamed_addr #1 {
  %2 = icmp sgt i32 %0, -1
  %3 = load i32, ptr @active_handles, align 4
  %.not = icmp sgt i32 %3, %0
  %or.cond = select i1 %2, i1 %.not, i1 false
  br i1 %or.cond, label %4, label %12

4:                                                ; preds = %1
  %5 = load ptr, ptr @index_headers, align 8, !tbaa !5
  %6 = zext nneg i32 %0 to i64
  %7 = getelementptr inbounds %struct.index_header, ptr %5, i64 %6
  %8 = getelementptr inbounds i8, ptr %7, i64 32
  %9 = load ptr, ptr %8, align 8, !tbaa !9
  %.not6 = icmp eq ptr %9, null
  br i1 %.not6, label %11, label %10

10:                                               ; preds = %4
  tail call void @free(ptr noundef nonnull %9) #3
  br label %11

11:                                               ; preds = %10, %4
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 1 dereferenceable(40) %7, i8 0, i64 40, i1 false)
  br label %12

12:                                               ; preds = %1, %11
  ret void
}

; 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #1 = { mustprogress nounwind willreturn 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 = { 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 = !{!7, !7, i64 0}


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