; LLVM IR from yudi-matsuzake/libgenerics :: src (trie)

; 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.tnode_t = type { ptr, [256 x ptr] }
%struct.trie_t = type { i64, i64, %struct.tnode_t }

; 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 uwtable
declare dso_local ptr @node_at(ptr noundef, ptr noundef, i64 noundef) #1

; Function Attrs: nounwind
declare void @free(ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @trie_remove_element(ptr noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !9
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = icmp ne ptr %12, null
  br i1 %13, label %15, label %14

14:                                               ; preds = %3
  store i32 1, ptr %4, align 4
  br label %40

15:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = load i64, ptr %7, align 8, !tbaa !9
  %19 = call ptr @node_at(ptr noundef %16, ptr noundef %17, i64 noundef %18)
  store ptr %19, ptr %8, align 8, !tbaa !5
  %20 = load ptr, ptr %8, align 8, !tbaa !5
  %21 = icmp ne ptr %20, null
  br i1 %21, label %23, label %22

22:                                               ; preds = %15
  store i32 7, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %39

23:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  %24 = load ptr, ptr %8, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.tnode_t, ptr %24, i32 0, i32 0
  %26 = load ptr, ptr %25, align 8, !tbaa !11
  store ptr %26, ptr %10, align 8, !tbaa !5
  %27 = load ptr, ptr %8, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.tnode_t, ptr %27, i32 0, i32 0
  store ptr null, ptr %28, align 8, !tbaa !11
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.trie_t, ptr %29, i32 0, i32 0
  %31 = load i64, ptr %30, align 8, !tbaa !13
  %32 = add i64 %31, -1
  store i64 %32, ptr %30, align 8, !tbaa !13
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  %33 = load ptr, ptr %10, align 8, !tbaa !5
  store ptr %33, ptr %11, align 8, !tbaa !5
  %34 = load ptr, ptr %11, align 8, !tbaa !5
  %35 = icmp ne ptr %34, null
  br i1 %35, label %36, label %38

36:                                               ; preds = %23
  %37 = load ptr, ptr %11, align 8, !tbaa !5
  call void @free(ptr noundef %37) #3
  br label %38

38:                                               ; preds = %36, %23
  store i32 0, ptr %4, align 4
  store i32 1, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  br label %39

39:                                               ; preds = %38, %22
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %40

40:                                               ; preds = %39, %14
  %41 = load i32, ptr %4, align 4
  ret i32 %41
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 "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, !6, i64 0}
!12 = !{!"tnode_t", !6, i64 0, !7, i64 8}
!13 = !{!14, !10, i64 0}
!14 = !{!"trie_t", !10, i64 0, !10, i64 8, !12, i64 16}


; 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"

; Function Attrs: nounwind uwtable
declare dso_local ptr @node_at(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 8) i32 @trie_remove_element(ptr noundef %0, ptr noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %11, label %4

4:                                                ; preds = %3
  %5 = tail call ptr @node_at(ptr noundef nonnull %0, ptr noundef %1, i64 noundef %2)
  %.not14 = icmp eq ptr %5, null
  br i1 %.not14, label %11, label %6

6:                                                ; preds = %4
  %7 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr null, ptr %5, align 8, !tbaa !5
  %8 = load i64, ptr %0, align 8, !tbaa !10
  %9 = add i64 %8, -1
  store i64 %9, ptr %0, align 8, !tbaa !10
  %.not15 = icmp eq ptr %7, null
  br i1 %.not15, label %11, label %10

10:                                               ; preds = %6
  tail call void @free(ptr noundef nonnull %7) #2
  br label %11

11:                                               ; preds = %4, %10, %6, %3
  %.1 = phi i32 [ 1, %3 ], [ 7, %4 ], [ 0, %10 ], [ 0, %6 ]
  ret i32 %.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 = { 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, !7, i64 0}
!6 = !{!"tnode_t", !7, i64 0, !8, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !12, i64 0}
!11 = !{!"trie_t", !12, i64 0, !12, i64 8, !6, i64 16}
!12 = !{!"long", !8, i64 0}


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