; LLVM IR from VAR-solutions/Algorithms :: data structures/trie/c (BST)

; 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.node = type { i32, ptr, ptr }

; Function Attrs: nounwind uwtable
declare dso_local ptr @least(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 ptr @deleteNode(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %13

11:                                               ; preds = %2
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %12, ptr %3, align 8
  br label %86

13:                                               ; preds = %2
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.node, ptr %15, i32 0, i32 0
  %17 = load i32, ptr %16, align 8, !tbaa !11
  %18 = icmp slt i32 %14, %17
  br i1 %18, label %19, label %27

19:                                               ; preds = %13
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.node, ptr %20, i32 0, i32 1
  %22 = load ptr, ptr %21, align 8, !tbaa !13
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = call ptr @deleteNode(ptr noundef %22, i32 noundef %23)
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.node, ptr %25, i32 0, i32 1
  store ptr %24, ptr %26, align 8, !tbaa !13
  br label %86

27:                                               ; preds = %13
  %28 = load i32, ptr %5, align 4, !tbaa !9
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.node, ptr %29, i32 0, i32 0
  %31 = load i32, ptr %30, align 8, !tbaa !11
  %32 = icmp sgt i32 %28, %31
  br i1 %32, label %33, label %41

33:                                               ; preds = %27
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.node, ptr %34, i32 0, i32 2
  %36 = load ptr, ptr %35, align 8, !tbaa !14
  %37 = load i32, ptr %5, align 4, !tbaa !9
  %38 = call ptr @deleteNode(ptr noundef %36, i32 noundef %37)
  %39 = load ptr, ptr %4, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct.node, ptr %39, i32 0, i32 2
  store ptr %38, ptr %40, align 8, !tbaa !14
  br label %85

41:                                               ; preds = %27
  %42 = load ptr, ptr %4, align 8, !tbaa !5
  %43 = getelementptr inbounds %struct.node, ptr %42, i32 0, i32 1
  %44 = load ptr, ptr %43, align 8, !tbaa !13
  %45 = icmp eq ptr %44, null
  br i1 %45, label %46, label %52

46:                                               ; preds = %41
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %47 = load ptr, ptr %4, align 8, !tbaa !5
  %48 = getelementptr inbounds %struct.node, ptr %47, i32 0, i32 2
  %49 = load ptr, ptr %48, align 8, !tbaa !14
  store ptr %49, ptr %6, align 8, !tbaa !5
  %50 = load ptr, ptr %4, align 8, !tbaa !5
  call void @free(ptr noundef %50) #3
  %51 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %51, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %86

52:                                               ; preds = %41
  %53 = load ptr, ptr %4, align 8, !tbaa !5
  %54 = getelementptr inbounds %struct.node, ptr %53, i32 0, i32 2
  %55 = load ptr, ptr %54, align 8, !tbaa !14
  %56 = icmp eq ptr %55, null
  br i1 %56, label %57, label %63

57:                                               ; preds = %52
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %58 = load ptr, ptr %4, align 8, !tbaa !5
  %59 = getelementptr inbounds %struct.node, ptr %58, i32 0, i32 1
  %60 = load ptr, ptr %59, align 8, !tbaa !13
  store ptr %60, ptr %7, align 8, !tbaa !5
  %61 = load ptr, ptr %4, align 8, !tbaa !5
  call void @free(ptr noundef %61) #3
  %62 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %62, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %86

63:                                               ; preds = %52
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %64 = load ptr, ptr %4, align 8, !tbaa !5
  %65 = getelementptr inbounds %struct.node, ptr %64, i32 0, i32 2
  %66 = load ptr, ptr %65, align 8, !tbaa !14
  store ptr %66, ptr %8, align 8, !tbaa !5
  %67 = load ptr, ptr %8, align 8, !tbaa !5
  %68 = call ptr @least(ptr noundef %67)
  store ptr %68, ptr %8, align 8, !tbaa !5
  %69 = load ptr, ptr %8, align 8, !tbaa !5
  %70 = getelementptr inbounds %struct.node, ptr %69, i32 0, i32 0
  %71 = load i32, ptr %70, align 8, !tbaa !11
  %72 = load ptr, ptr %4, align 8, !tbaa !5
  %73 = getelementptr inbounds %struct.node, ptr %72, i32 0, i32 0
  store i32 %71, ptr %73, align 8, !tbaa !11
  %74 = load ptr, ptr %4, align 8, !tbaa !5
  %75 = getelementptr inbounds %struct.node, ptr %74, i32 0, i32 2
  %76 = load ptr, ptr %75, align 8, !tbaa !14
  %77 = load ptr, ptr %8, align 8, !tbaa !5
  %78 = getelementptr inbounds %struct.node, ptr %77, i32 0, i32 0
  %79 = load i32, ptr %78, align 8, !tbaa !11
  %80 = call ptr @deleteNode(ptr noundef %76, i32 noundef %79)
  %81 = load ptr, ptr %4, align 8, !tbaa !5
  %82 = getelementptr inbounds %struct.node, ptr %81, i32 0, i32 2
  store ptr %80, ptr %82, align 8, !tbaa !14
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %83

83:                                               ; preds = %63
  br label %84

84:                                               ; preds = %83
  br label %85

85:                                               ; preds = %84, %33
  br label %86

86:                                               ; preds = %85, %57, %46, %19, %11
  %87 = load ptr, ptr %3, align 8
  ret ptr %87
}

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

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"node", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 8}
!14 = !{!12, !6, 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 @least(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @deleteNode(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %common.ret33, label %4

4:                                                ; preds = %2
  %5 = load i32, ptr %0, align 8, !tbaa !5
  %6 = icmp sgt i32 %5, %1
  br i1 %6, label %7, label %11

common.ret33:                                     ; preds = %2, %26, %23, %27, %13, %7
  %common.ret33.op = phi ptr [ undef, %7 ], [ undef, %13 ], [ undef, %27 ], [ %22, %23 ], [ %19, %26 ], [ null, %2 ]
  ret ptr %common.ret33.op

7:                                                ; preds = %4
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %10 = tail call ptr @deleteNode(ptr noundef %9, i32 noundef %1)
  store ptr %10, ptr %8, align 8, !tbaa !11
  br label %common.ret33

11:                                               ; preds = %4
  %12 = icmp slt i32 %5, %1
  br i1 %12, label %13, label %17

13:                                               ; preds = %11
  %14 = getelementptr inbounds i8, ptr %0, i64 16
  %15 = load ptr, ptr %14, align 8, !tbaa !12
  %16 = tail call ptr @deleteNode(ptr noundef %15, i32 noundef %1)
  store ptr %16, ptr %14, align 8, !tbaa !12
  br label %common.ret33

17:                                               ; preds = %11
  %18 = getelementptr inbounds i8, ptr %0, i64 8
  %19 = load ptr, ptr %18, align 8, !tbaa !11
  %20 = icmp eq ptr %19, null
  %21 = getelementptr inbounds i8, ptr %0, i64 16
  %22 = load ptr, ptr %21, align 8, !tbaa !12
  br i1 %20, label %23, label %24

23:                                               ; preds = %17
  tail call void @free(ptr noundef nonnull %0) #2
  br label %common.ret33

24:                                               ; preds = %17
  %25 = icmp eq ptr %22, null
  br i1 %25, label %26, label %27

26:                                               ; preds = %24
  tail call void @free(ptr noundef nonnull %0) #2
  br label %common.ret33

27:                                               ; preds = %24
  %28 = tail call ptr @least(ptr noundef nonnull %22)
  %29 = load i32, ptr %28, align 8, !tbaa !5
  store i32 %29, ptr %0, align 8, !tbaa !5
  %30 = load ptr, ptr %21, align 8, !tbaa !12
  %31 = tail call ptr @deleteNode(ptr noundef %30, i32 noundef %29)
  store ptr %31, ptr %21, align 8, !tbaa !12
  br label %common.ret33
}

; 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 = { 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 = !{!"node", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !10, i64 16}


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