; LLVM IR from AlgoGenesis/C :: Trie/LongestCommonPrefix (LongestCommonPrefix)

; 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.TrieNode = type { i8, [26 x ptr], i8, i32 }

; Function Attrs: nounwind uwtable
define dso_local ptr @createNode(i8 noundef signext %0) #0 {
  %2 = alloca i8, align 1
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store i8 %0, ptr %2, align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %5 = call noalias ptr @malloc(i64 noundef 224) #4
  store ptr %5, ptr %3, align 8, !tbaa !8
  %6 = load i8, ptr %2, align 1, !tbaa !5
  %7 = load ptr, ptr %3, align 8, !tbaa !8
  %8 = getelementptr inbounds %struct.TrieNode, ptr %7, i32 0, i32 0
  store i8 %6, ptr %8, align 8, !tbaa !10
  %9 = load ptr, ptr %3, align 8, !tbaa !8
  %10 = getelementptr inbounds %struct.TrieNode, ptr %9, i32 0, i32 2
  store i8 0, ptr %10, align 8, !tbaa !14
  %11 = load ptr, ptr %3, align 8, !tbaa !8
  %12 = getelementptr inbounds %struct.TrieNode, ptr %11, i32 0, i32 3
  store i32 0, ptr %12, align 4, !tbaa !15
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !16
  br label %13

13:                                               ; preds = %23, %1
  %14 = load i32, ptr %4, align 4, !tbaa !16
  %15 = icmp slt i32 %14, 26
  br i1 %15, label %17, label %16

16:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %26

17:                                               ; preds = %13
  %18 = load ptr, ptr %3, align 8, !tbaa !8
  %19 = getelementptr inbounds %struct.TrieNode, ptr %18, i32 0, i32 1
  %20 = load i32, ptr %4, align 4, !tbaa !16
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [26 x ptr], ptr %19, i64 0, i64 %21
  store ptr null, ptr %22, align 8, !tbaa !8
  br label %23

23:                                               ; preds = %17
  %24 = load i32, ptr %4, align 4, !tbaa !16
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %4, align 4, !tbaa !16
  br label %13, !llvm.loop !17

26:                                               ; preds = %16
  %27 = load ptr, ptr %3, align 8, !tbaa !8
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  ret ptr %27
}

; 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 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"any pointer", !6, i64 0}
!10 = !{!11, !6, i64 0}
!11 = !{!"TrieNode", !6, i64 0, !6, i64 8, !12, i64 216, !13, i64 220}
!12 = !{!"_Bool", !6, i64 0}
!13 = !{!"int", !6, i64 0}
!14 = !{!11, !12, i64 216}
!15 = !{!11, !13, i64 220}
!16 = !{!13, !13, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"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 nofree nounwind willreturn memory(write, argmem: none, inaccessiblemem: readwrite) uwtable
define dso_local noalias noundef ptr @createNode(i8 noundef signext %0) local_unnamed_addr #0 {
  %2 = tail call noalias dereferenceable_or_null(224) ptr @malloc(i64 noundef 224) #3
  store i8 %0, ptr %2, align 8, !tbaa !5
  %3 = getelementptr inbounds i8, ptr %2, i64 220
  store i32 0, ptr %3, align 4, !tbaa !11
  %4 = getelementptr inbounds i8, ptr %2, i64 8
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(209) %4, i8 0, i64 209, i1 false)
  ret ptr %2
}

; 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(write, argmem: none, inaccessiblemem: readwrite) 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, !7, i64 0}
!6 = !{!"TrieNode", !7, i64 0, !7, i64 8, !9, i64 216, !10, i64 220}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"_Bool", !7, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!6, !10, i64 220}


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