; LLVM IR from viveakrt/Competitive-programing :: SPOJ/koiline.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
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %7 = icmp ne ptr %6, null
  br i1 %7, label %9, label %8

8:                                                ; preds = %2
  br label %46

9:                                                ; preds = %2
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = load ptr, ptr %10, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.node, ptr %11, i32 0, i32 1
  %13 = load i32, ptr %12, align 4, !tbaa !11
  %14 = load i32, ptr %4, align 4, !tbaa !9
  %15 = icmp eq i32 %13, %14
  br i1 %15, label %16, label %26

16:                                               ; preds = %9
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = load ptr, ptr %18, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.node, ptr %19, i32 0, i32 3
  %21 = load ptr, ptr %20, align 8, !tbaa !13
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load ptr, ptr %22, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.node, ptr %23, i32 0, i32 4
  %25 = load ptr, ptr %24, align 8, !tbaa !14
  call void @_Z5mergeRP4nodeS0_S0_(ptr noundef nonnull align 8 dereferenceable(8) %17, ptr noundef %21, ptr noundef %25)
  br label %46

26:                                               ; preds = %9
  %27 = load i32, ptr %4, align 4, !tbaa !9
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = load ptr, ptr %28, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.node, ptr %29, i32 0, i32 1
  %31 = load i32, ptr %30, align 4, !tbaa !11
  %32 = icmp sgt i32 %27, %31
  br i1 %32, label %33, label %38

33:                                               ; preds = %26
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  %35 = load ptr, ptr %34, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.node, ptr %35, i32 0, i32 4
  %37 = load i32, ptr %4, align 4, !tbaa !9
  call void @_Z5eraseRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %36, i32 noundef %37)
  br label %43

38:                                               ; preds = %26
  %39 = load ptr, ptr %3, align 8, !tbaa !5
  %40 = load ptr, ptr %39, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.node, ptr %40, i32 0, i32 3
  %42 = load i32, ptr %4, align 4, !tbaa !9
  call void @_Z5eraseRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %41, i32 noundef %42)
  br label %43

43:                                               ; preds = %38, %33
  %44 = load ptr, ptr %3, align 8, !tbaa !5
  %45 = load ptr, ptr %44, align 8, !tbaa !5
  call void @_Z3updP4node(ptr noundef %45)
  br label %46

46:                                               ; preds = %43, %16, %8
  ret void
}

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" }

!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 %common.ret, 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)
  br label %common.ret

common.ret:                                       ; preds = %8, %2, %13
  ret void

13:                                               ; preds = %4
  %14 = icmp slt i32 %6, %1
  %. = select i1 %14, i64 24, i64 16
  %15 = getelementptr inbounds i8, ptr %3, i64 %.
  tail call void @_Z5eraseRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %15, i32 noundef %1)
  %16 = load ptr, ptr %0, align 8, !tbaa !5
  tail call void @_Z3updP4node(ptr noundef %16)
  br label %common.ret
}

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" }

!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: EarlyCSEPass,GlobalOptPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass