; LLVM IR from gokcehan/pns :: generators/gridgen-patched (gridgen)

; 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"

@source_list = external dso_local global ptr, align 8
@sink_list = external dso_local global ptr, align 8
@arc_list = external dso_local global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local void @frees() #0 {
  %1 = load ptr, ptr @arc_list, align 8, !tbaa !5
  %2 = icmp ne ptr %1, null
  br i1 %2, label %3, label %5

3:                                                ; preds = %0
  %4 = load ptr, ptr @arc_list, align 8, !tbaa !5
  call void @free(ptr noundef %4) #2
  br label %5

5:                                                ; preds = %3, %0
  %6 = load ptr, ptr @source_list, align 8, !tbaa !5
  %7 = icmp ne ptr %6, null
  br i1 %7, label %8, label %10

8:                                                ; preds = %5
  %9 = load ptr, ptr @source_list, align 8, !tbaa !5
  call void @free(ptr noundef %9) #2
  br label %10

10:                                               ; preds = %8, %5
  %11 = load ptr, ptr @sink_list, align 8, !tbaa !5
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %15

13:                                               ; preds = %10
  %14 = load ptr, ptr @sink_list, align 8, !tbaa !5
  call void @free(ptr noundef %14) #2
  br label %15

15:                                               ; preds = %13, %10
  store ptr null, ptr @arc_list, align 8, !tbaa !5
  store ptr null, ptr @source_list, align 8, !tbaa !5
  store ptr null, ptr @sink_list, align 8, !tbaa !5
  ret void
}

; Function Attrs: nounwind
declare void @free(ptr noundef) #1

attributes #0 = { 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 #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 }

!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"}


; 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"

@source_list = external dso_local local_unnamed_addr global ptr, align 8
@sink_list = external dso_local local_unnamed_addr global ptr, align 8
@arc_list = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress nounwind willreturn uwtable
define dso_local void @frees() local_unnamed_addr #0 {
  %1 = load ptr, ptr @arc_list, align 8, !tbaa !5
  %.not = icmp eq ptr %1, null
  br i1 %.not, label %3, label %2

2:                                                ; preds = %0
  tail call void @free(ptr noundef nonnull %1) #2
  br label %3

3:                                                ; preds = %2, %0
  %4 = load ptr, ptr @source_list, align 8, !tbaa !5
  %.not3 = icmp eq ptr %4, null
  br i1 %.not3, label %6, label %5

5:                                                ; preds = %3
  tail call void @free(ptr noundef nonnull %4) #2
  br label %6

6:                                                ; preds = %5, %3
  %7 = load ptr, ptr @sink_list, align 8, !tbaa !5
  %.not4 = icmp eq ptr %7, null
  br i1 %.not4, label %9, label %8

8:                                                ; preds = %6
  tail call void @free(ptr noundef nonnull %7) #2
  br label %9

9:                                                ; preds = %8, %6
  store ptr null, ptr @arc_list, align 8, !tbaa !5
  store ptr null, ptr @source_list, align 8, !tbaa !5
  store ptr null, ptr @sink_list, align 8, !tbaa !5
  ret void
}

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #1

attributes #0 = { 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 #1 = { 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 #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"}


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