; LLVM IR from UtkarshPathrabe/Competitive-Coding :: Model Algorithms/Binary Search Tree (Remove nodes outside given range)

; 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: 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: mustprogress uwtable
define dso_local noundef ptr @_Z18removeOutsideRangeP4nodeii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = icmp eq ptr %10, null
  br i1 %11, label %12, label %13

12:                                               ; preds = %3
  store ptr null, ptr %4, align 8
  br label %56

13:                                               ; preds = %3
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.node, ptr %14, i32 0, i32 1
  %16 = load ptr, ptr %15, align 8, !tbaa !11
  %17 = load i32, ptr %6, align 4, !tbaa !9
  %18 = load i32, ptr %7, align 4, !tbaa !9
  %19 = call noundef ptr @_Z18removeOutsideRangeP4nodeii(ptr noundef %16, i32 noundef %17, i32 noundef %18)
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.node, ptr %20, i32 0, i32 1
  store ptr %19, ptr %21, align 8, !tbaa !11
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.node, ptr %22, i32 0, i32 2
  %24 = load ptr, ptr %23, align 8, !tbaa !13
  %25 = load i32, ptr %6, align 4, !tbaa !9
  %26 = load i32, ptr %7, align 4, !tbaa !9
  %27 = call noundef ptr @_Z18removeOutsideRangeP4nodeii(ptr noundef %24, i32 noundef %25, i32 noundef %26)
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.node, ptr %28, i32 0, i32 2
  store ptr %27, ptr %29, align 8, !tbaa !13
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.node, ptr %30, i32 0, i32 0
  %32 = load i32, ptr %31, align 8, !tbaa !14
  %33 = load i32, ptr %6, align 4, !tbaa !9
  %34 = icmp slt i32 %32, %33
  br i1 %34, label %35, label %41

35:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %36 = load ptr, ptr %5, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.node, ptr %36, i32 0, i32 2
  %38 = load ptr, ptr %37, align 8, !tbaa !13
  store ptr %38, ptr %8, align 8, !tbaa !5
  %39 = load ptr, ptr %5, align 8, !tbaa !5
  call void @free(ptr noundef %39) #3
  %40 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %40, ptr %4, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %56

41:                                               ; preds = %13
  %42 = load ptr, ptr %5, align 8, !tbaa !5
  %43 = getelementptr inbounds %struct.node, ptr %42, i32 0, i32 0
  %44 = load i32, ptr %43, align 8, !tbaa !14
  %45 = load i32, ptr %7, align 4, !tbaa !9
  %46 = icmp sgt i32 %44, %45
  br i1 %46, label %47, label %53

47:                                               ; preds = %41
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %48 = load ptr, ptr %5, align 8, !tbaa !5
  %49 = getelementptr inbounds %struct.node, ptr %48, i32 0, i32 1
  %50 = load ptr, ptr %49, align 8, !tbaa !11
  store ptr %50, ptr %9, align 8, !tbaa !5
  %51 = load ptr, ptr %5, align 8, !tbaa !5
  call void @free(ptr noundef %51) #3
  %52 = load ptr, ptr %9, align 8, !tbaa !5
  store ptr %52, ptr %4, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  br label %56

53:                                               ; preds = %41
  br label %54

54:                                               ; preds = %53
  %55 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %55, ptr %4, align 8
  br label %56

56:                                               ; preds = %54, %47, %35, %12
  %57 = load ptr, ptr %4, align 8
  ret ptr %57
}

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"_ZTS4node", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 16}
!14 = !{!12, !10, 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_Z18removeOutsideRangeP4nodeii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %0, null
  br i1 %4, label %18, label %5

5:                                                ; preds = %3
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %8 = tail call noundef ptr @_Z18removeOutsideRangeP4nodeii(ptr noundef %7, i32 noundef %1, i32 noundef %2)
  store ptr %8, ptr %6, align 8, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %0, i64 16
  %10 = load ptr, ptr %9, align 8, !tbaa !11
  %11 = tail call noundef ptr @_Z18removeOutsideRangeP4nodeii(ptr noundef %10, i32 noundef %1, i32 noundef %2)
  store ptr %11, ptr %9, align 8, !tbaa !11
  %12 = load i32, ptr %0, align 8, !tbaa !12
  %13 = icmp slt i32 %12, %1
  br i1 %13, label %.sink.split, label %14

14:                                               ; preds = %5
  %15 = icmp sgt i32 %12, %2
  br i1 %15, label %16, label %18

16:                                               ; preds = %14
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  br label %.sink.split

.sink.split:                                      ; preds = %5, %16
  %.0.ph = phi ptr [ %17, %16 ], [ %11, %5 ]
  tail call void @free(ptr noundef nonnull %0) #2
  br label %18

18:                                               ; preds = %.sink.split, %14, %3
  %.0 = phi ptr [ null, %3 ], [ %0, %14 ], [ %.0.ph, %.sink.split ]
  ret ptr %.0
}

; 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 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, !10, i64 8}
!6 = !{!"_ZTS4node", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 16}
!12 = !{!6, !7, i64 0}


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