; LLVM IR from AlgoGenesis/C :: Trie/AutocompletePrefix (autocompletePrefix)

; 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 { [26 x ptr], i8 }

; 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: nounwind uwtable
define dso_local ptr @searchPrefix(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %9, ptr %6, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %38, %2
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = load i8, ptr %11, align 1, !tbaa !9
  %13 = icmp ne i8 %12, 0
  br i1 %13, label %14, label %39

14:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = load i8, ptr %15, align 1, !tbaa !9
  %17 = sext i8 %16 to i32
  %18 = sub nsw i32 %17, 97
  store i32 %18, ptr %7, align 4, !tbaa !10
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.TrieNode, ptr %19, i32 0, i32 0
  %21 = load i32, ptr %7, align 4, !tbaa !10
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [26 x ptr], ptr %20, i64 0, i64 %22
  %24 = load ptr, ptr %23, align 8, !tbaa !5
  %25 = icmp ne ptr %24, null
  br i1 %25, label %27, label %26

26:                                               ; preds = %14
  store ptr null, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %36

27:                                               ; preds = %14
  %28 = load ptr, ptr %6, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.TrieNode, ptr %28, i32 0, i32 0
  %30 = load i32, ptr %7, align 4, !tbaa !10
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [26 x ptr], ptr %29, i64 0, i64 %31
  %33 = load ptr, ptr %32, align 8, !tbaa !5
  store ptr %33, ptr %6, align 8, !tbaa !5
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = getelementptr inbounds i8, ptr %34, i32 1
  store ptr %35, ptr %5, align 8, !tbaa !5
  store i32 0, ptr %8, align 4
  br label %36

36:                                               ; preds = %27, %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  %37 = load i32, ptr %8, align 4
  switch i32 %37, label %41 [
    i32 0, label %38
  ]

38:                                               ; preds = %36
  br label %10, !llvm.loop !12

39:                                               ; preds = %10
  %40 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %40, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %41

41:                                               ; preds = %39, %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %42 = load ptr, ptr %3, align 8
  ret ptr %42
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local ptr @searchPrefix(ptr noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  br label %3

3:                                                ; preds = %5, %2
  %.013 = phi ptr [ %1, %2 ], [ %10, %5 ]
  %.011 = phi ptr [ %0, %2 ], [ %9, %5 ]
  %4 = load i8, ptr %.013, align 1, !tbaa !5
  %.not = icmp eq i8 %4, 0
  br i1 %.not, label %11, label %5

5:                                                ; preds = %3
  %6 = sext i8 %4 to i64
  %7 = add nsw i64 %6, -97
  %8 = getelementptr inbounds [26 x ptr], ptr %.011, i64 0, i64 %7
  %9 = load ptr, ptr %8, align 8, !tbaa !8
  %.not17.not = icmp eq ptr %9, null
  %10 = getelementptr inbounds i8, ptr %.013, i64 1
  br i1 %.not17.not, label %11, label %3, !llvm.loop !10

11:                                               ; preds = %3, %5
  %.2 = phi ptr [ null, %5 ], [ %.011, %3 ]
  ret ptr %.2
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: 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" }

!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 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


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