; LLVM IR from ayush-tulsyan/ACM-ICPC-Handbook :: code/SuffixTree.ll (Z7newNodeiPi)

; 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.SuffixTreeNode = type { [256 x ptr], ptr, i32, ptr, i32 }

@root = external dso_local global ptr, align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_Z7newNodeiPi(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %7 = call noalias ptr @malloc(i64 noundef 2080) #4
  store ptr %7, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %17, %2
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = icmp slt i32 %9, 256
  br i1 %10, label %11, label %20

11:                                               ; preds = %8
  %12 = load ptr, ptr %5, align 8, !tbaa !9
  %13 = getelementptr inbounds %struct.SuffixTreeNode, ptr %12, i32 0, i32 0
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [256 x ptr], ptr %13, i64 0, i64 %15
  store ptr null, ptr %16, align 8, !tbaa !9
  br label %17

17:                                               ; preds = %11
  %18 = load i32, ptr %6, align 4, !tbaa !5
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %6, align 4, !tbaa !5
  br label %8, !llvm.loop !11

20:                                               ; preds = %8
  %21 = load ptr, ptr @root, align 8, !tbaa !9
  %22 = load ptr, ptr %5, align 8, !tbaa !9
  %23 = getelementptr inbounds %struct.SuffixTreeNode, ptr %22, i32 0, i32 1
  store ptr %21, ptr %23, align 8, !tbaa !13
  %24 = load i32, ptr %3, align 4, !tbaa !5
  %25 = load ptr, ptr %5, align 8, !tbaa !9
  %26 = getelementptr inbounds %struct.SuffixTreeNode, ptr %25, i32 0, i32 2
  store i32 %24, ptr %26, align 8, !tbaa !15
  %27 = load ptr, ptr %4, align 8, !tbaa !9
  %28 = load ptr, ptr %5, align 8, !tbaa !9
  %29 = getelementptr inbounds %struct.SuffixTreeNode, ptr %28, i32 0, i32 3
  store ptr %27, ptr %29, align 8, !tbaa !16
  %30 = load ptr, ptr %5, align 8, !tbaa !9
  %31 = getelementptr inbounds %struct.SuffixTreeNode, ptr %30, i32 0, i32 4
  store i32 -1, ptr %31, align 8, !tbaa !17
  %32 = load ptr, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret ptr %32
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind allocsize(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 #3 = { nounwind }
attributes #4 = { nounwind allocsize(0) }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !10, i64 2048}
!14 = !{!"_ZTS14SuffixTreeNode", !7, i64 0, !10, i64 2048, !6, i64 2056, !10, i64 2064, !6, i64 2072}
!15 = !{!14, !6, i64 2056}
!16 = !{!14, !10, i64 2064}
!17 = !{!14, !6, i64 2072}


; 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"

@root = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress nofree nounwind willreturn memory(readwrite, argmem: none) uwtable
define dso_local noalias noundef ptr @_Z7newNodeiPi(i32 noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = tail call noalias dereferenceable_or_null(2080) ptr @malloc(i64 noundef 2080) #3
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(2048) %3, i8 0, i64 2048, i1 false), !tbaa !5
  %4 = load ptr, ptr @root, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %3, i64 2048
  store ptr %4, ptr %5, align 8, !tbaa !9
  %6 = getelementptr inbounds i8, ptr %3, i64 2056
  store i32 %0, ptr %6, align 8, !tbaa !12
  %7 = getelementptr inbounds i8, ptr %3, i64 2064
  store ptr %1, ptr %7, align 8, !tbaa !13
  %8 = getelementptr inbounds i8, ptr %3, i64 2072
  store i32 -1, ptr %8, align 8, !tbaa !14
  ret ptr %3
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

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

attributes #0 = { mustprogress nofree nounwind willreturn memory(readwrite, argmem: none) 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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { nounwind allocsize(0) }

!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, !6, i64 2048}
!10 = !{!"_ZTS14SuffixTreeNode", !7, i64 0, !6, i64 2048, !11, i64 2056, !6, i64 2064, !11, i64 2072}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 2056}
!13 = !{!10, !6, i64 2064}
!14 = !{!10, !11, i64 2072}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass