; LLVM IR from Algo-Phantoms/Algo-Tree :: Code/C++/remove_duplicates.ll (Z15RemoveDuplicateP4Node)

; 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 }

; 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 nounwind uwtable
define dso_local void @_Z15RemoveDuplicateP4Node(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca [10000 x i32], align 16
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 40000, ptr %3) #4
  call void @llvm.memset.p0.i64(ptr align 16 %3, i8 0, i64 40000, i1 false)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %7, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  br label %8

8:                                                ; preds = %37, %26, %1
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %42

11:                                               ; preds = %8
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.Node, ptr %12, i32 0, i32 0
  %14 = load i32, ptr %13, align 8, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [10000 x i32], ptr %3, i64 0, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !12
  %18 = add nsw i32 %17, 1
  store i32 %18, ptr %16, align 4, !tbaa !12
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.Node, ptr %19, i32 0, i32 0
  %21 = load i32, ptr %20, align 8, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [10000 x i32], ptr %3, i64 0, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !12
  %25 = icmp sgt i32 %24, 1
  br i1 %25, label %26, label %37

26:                                               ; preds = %11
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.Node, ptr %27, i32 0, i32 1
  %29 = load ptr, ptr %28, align 8, !tbaa !13
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.Node, ptr %30, i32 0, i32 1
  store ptr %29, ptr %31, align 8, !tbaa !13
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %32, ptr %6, align 8, !tbaa !5
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.Node, ptr %33, i32 0, i32 1
  %35 = load ptr, ptr %34, align 8, !tbaa !13
  store ptr %35, ptr %4, align 8, !tbaa !5
  %36 = load ptr, ptr %6, align 8, !tbaa !5
  call void @free(ptr noundef %36) #4
  br label %8, !llvm.loop !14

37:                                               ; preds = %11
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %38, ptr %5, align 8, !tbaa !5
  %39 = load ptr, ptr %4, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct.Node, ptr %39, i32 0, i32 1
  %41 = load ptr, ptr %40, align 8, !tbaa !13
  store ptr %41, ptr %4, align 8, !tbaa !5
  br label %8, !llvm.loop !14

42:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 40000, ptr %3) #4
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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, !11, i64 0}
!10 = !{!"_ZTS4Node", !11, i64 0, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !6, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z15RemoveDuplicateP4Node(ptr noundef %0) local_unnamed_addr #1 {
  %2 = alloca [10000 x i32], align 16
  call void @llvm.lifetime.start.p0(i64 40000, ptr nonnull %2) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(40000) %2, i8 0, i64 40000, i1 false)
  %.not1315 = icmp eq ptr %0, null
  br i1 %.not1315, label %.outer._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.outer
  %.0.ph17 = phi ptr [ %12, %.outer ], [ %0, %1 ]
  %.011.ph16 = phi ptr [ %.014, %.outer ], [ undef, %1 ]
  %3 = getelementptr inbounds i8, ptr %.011.ph16, i64 8
  br label %4

4:                                                ; preds = %.lr.ph, %13
  %.014 = phi ptr [ %.0.ph17, %.lr.ph ], [ %12, %13 ]
  %5 = load i32, ptr %.014, align 8, !tbaa !5
  %6 = sext i32 %5 to i64
  %7 = getelementptr inbounds [10000 x i32], ptr %2, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !11
  %9 = add nsw i32 %8, 1
  store i32 %9, ptr %7, align 4, !tbaa !11
  %10 = icmp sgt i32 %8, 0
  %11 = getelementptr inbounds i8, ptr %.014, i64 8
  %12 = load ptr, ptr %11, align 8, !tbaa !12
  br i1 %10, label %13, label %.outer

13:                                               ; preds = %4
  store ptr %12, ptr %3, align 8, !tbaa !12
  tail call void @free(ptr noundef nonnull %.014) #4
  %.not = icmp eq ptr %12, null
  br i1 %.not, label %.outer._crit_edge, label %4, !llvm.loop !13

.outer:                                           ; preds = %4
  %.not13 = icmp eq ptr %12, null
  br i1 %.not13, label %.outer._crit_edge, label %.lr.ph, !llvm.loop !13

.outer._crit_edge:                                ; preds = %.outer, %13, %1
  call void @llvm.lifetime.end.p0(i64 40000, ptr nonnull %2) #4
  ret void
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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 #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, !7, i64 0}
!6 = !{!"_ZTS4Node", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!6, !10, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass