; LLVM IR from viveakrt/Competitive-programing :: SPOJ/adacrop.ll (Z5eraseRP4nodei)

; 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, i32, i32, ptr, ptr }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z3updP4node(ptr noundef) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5mergeRP4nodeS0_S0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef, ptr noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5eraseRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %8 = icmp ne ptr %7, null
  br i1 %8, label %10, label %9

9:                                                ; preds = %2
  br label %51

10:                                               ; preds = %2
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = load ptr, ptr %11, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.node, ptr %12, i32 0, i32 1
  %14 = load i32, ptr %13, align 4, !tbaa !11
  %15 = load i32, ptr %4, align 4, !tbaa !9
  %16 = icmp eq i32 %14, %15
  br i1 %16, label %17, label %30

17:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = load ptr, ptr %18, align 8, !tbaa !5
  store ptr %19, ptr %5, align 8, !tbaa !5
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = load ptr, ptr %21, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.node, ptr %22, i32 0, i32 3
  %24 = load ptr, ptr %23, align 8, !tbaa !13
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = load ptr, ptr %25, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.node, ptr %26, i32 0, i32 4
  %28 = load ptr, ptr %27, align 8, !tbaa !14
  call void @_Z5mergeRP4nodeS0_S0_(ptr noundef nonnull align 8 dereferenceable(8) %20, ptr noundef %24, ptr noundef %28)
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  call void @free(ptr noundef %29) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %48

30:                                               ; preds = %10
  %31 = load i32, ptr %4, align 4, !tbaa !9
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = load ptr, ptr %32, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.node, ptr %33, i32 0, i32 1
  %35 = load i32, ptr %34, align 4, !tbaa !11
  %36 = icmp sgt i32 %31, %35
  br i1 %36, label %37, label %42

37:                                               ; preds = %30
  %38 = load ptr, ptr %3, align 8, !tbaa !5
  %39 = load ptr, ptr %38, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct.node, ptr %39, i32 0, i32 4
  %41 = load i32, ptr %4, align 4, !tbaa !9
  call void @_Z5eraseRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %40, i32 noundef %41)
  br label %47

42:                                               ; preds = %30
  %43 = load ptr, ptr %3, align 8, !tbaa !5
  %44 = load ptr, ptr %43, align 8, !tbaa !5
  %45 = getelementptr inbounds %struct.node, ptr %44, i32 0, i32 3
  %46 = load i32, ptr %4, align 4, !tbaa !9
  call void @_Z5eraseRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %45, i32 noundef %46)
  br label %47

47:                                               ; preds = %42, %37
  br label %48

48:                                               ; preds = %47, %17
  %49 = load ptr, ptr %3, align 8, !tbaa !5
  %50 = load ptr, ptr %49, align 8, !tbaa !5
  call void @_Z3updP4node(ptr noundef %50)
  br label %51

51:                                               ; preds = %48, %9
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

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 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"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, !10, i64 4}
!12 = !{!"_ZTS4node", !10, i64 0, !10, i64 4, !10, i64 8, !6, i64 16, !6, i64 24}
!13 = !{!12, !6, i64 16}
!14 = !{!12, !6, i64 24}


; 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
declare dso_local void @_Z3updP4node(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5mergeRP4nodeS0_S0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5eraseRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = load ptr, ptr %0, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %21, label %4

4:                                                ; preds = %2
  %5 = getelementptr inbounds i8, ptr %3, i64 4
  %6 = load i32, ptr %5, align 4, !tbaa !9
  %7 = icmp eq i32 %6, %1
  br i1 %7, label %8, label %13

8:                                                ; preds = %4
  %9 = getelementptr inbounds i8, ptr %3, i64 16
  %10 = load ptr, ptr %9, align 8, !tbaa !12
  %11 = getelementptr inbounds i8, ptr %3, i64 24
  %12 = load ptr, ptr %11, align 8, !tbaa !13
  tail call void @_Z5mergeRP4nodeS0_S0_(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef %10, ptr noundef %12)
  tail call void @free(ptr noundef nonnull %3) #3
  br label %19

13:                                               ; preds = %4
  %14 = icmp slt i32 %6, %1
  br i1 %14, label %15, label %17

15:                                               ; preds = %13
  %16 = getelementptr inbounds i8, ptr %3, i64 24
  tail call void @_Z5eraseRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %16, i32 noundef %1)
  br label %19

17:                                               ; preds = %13
  %18 = getelementptr inbounds i8, ptr %3, i64 16
  tail call void @_Z5eraseRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %18, i32 noundef %1)
  br label %19

19:                                               ; preds = %15, %17, %8
  %20 = load ptr, ptr %0, align 8, !tbaa !5
  tail call void @_Z3updP4node(ptr noundef %20)
  br label %21

21:                                               ; preds = %2, %19
  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 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 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++ TBAA"}
!9 = !{!10, !11, i64 4}
!10 = !{!"_ZTS4node", !11, i64 0, !11, i64 4, !11, i64 8, !6, i64 16, !6, i64 24}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 16}
!13 = !{!10, !6, i64 24}


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