; LLVM IR from devparthgarg/Data-Structures-and-Algorithms :: 22. Trie (02 Trie Representation)

; 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.Trie = type <{ [26 x ptr], i8, [7 x i8] }>

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z6searchP4TrieRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %0, ptr noundef nonnull align 8 dereferenceable(32) %1) #0 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = 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 4, ptr %6) #3
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %11) #3
  %13 = trunc i64 %12 to i32
  store i32 %13, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %14, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %46, %2
  %16 = load i32, ptr %8, align 4, !tbaa !9
  %17 = load i32, ptr %6, align 4, !tbaa !9
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  store i32 2, ptr %9, align 4
  br label %49

20:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = load i32, ptr %8, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %21, i64 noundef %23)
  %25 = load i8, ptr %24, align 1, !tbaa !11
  %26 = sext i8 %25 to i32
  %27 = sub nsw i32 %26, 97
  store i32 %27, ptr %10, align 4, !tbaa !9
  %28 = load ptr, ptr %7, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.Trie, ptr %28, i32 0, i32 0
  %30 = load i32, ptr %10, align 4, !tbaa !9
  %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
  %34 = icmp eq ptr %33, null
  br i1 %34, label %35, label %36

35:                                               ; preds = %20
  store i1 false, ptr %3, align 1
  store i32 1, ptr %9, align 4
  br label %43

36:                                               ; preds = %20
  %37 = load ptr, ptr %7, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.Trie, ptr %37, i32 0, i32 0
  %39 = load i32, ptr %10, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [26 x ptr], ptr %38, i64 0, i64 %40
  %42 = load ptr, ptr %41, align 8, !tbaa !5
  store ptr %42, ptr %7, align 8, !tbaa !5
  store i32 0, ptr %9, align 4
  br label %43

43:                                               ; preds = %36, %35
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  %44 = load i32, ptr %9, align 4
  switch i32 %44, label %49 [
    i32 0, label %45
  ]

45:                                               ; preds = %43
  br label %46

46:                                               ; preds = %45
  %47 = load i32, ptr %8, align 4, !tbaa !9
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %8, align 4, !tbaa !9
  br label %15, !llvm.loop !12

49:                                               ; preds = %43, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  %50 = load i32, ptr %9, align 4
  switch i32 %50, label %56 [
    i32 2, label %51
  ]

51:                                               ; preds = %49
  %52 = load ptr, ptr %7, align 8, !tbaa !5
  %53 = getelementptr inbounds %struct.Trie, ptr %52, i32 0, i32 1
  %54 = load i8, ptr %53, align 8, !tbaa !14, !range !17, !noundef !18
  %55 = trunc i8 %54 to i1
  store i1 %55, ptr %3, align 1
  store i32 1, ptr %9, align 4
  br label %56

56:                                               ; preds = %51, %49
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %57 = load i1, ptr %3, align 1
  ret i1 %57
}

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

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) #0 align 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 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 = { 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 #3 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!15, !16, i64 208}
!15 = !{!"_ZTS4Trie", !7, i64 0, !16, i64 208}
!16 = !{!"bool", !7, i64 0}
!17 = !{i8 0, i8 2}
!18 = !{}


; 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 uwtable
define dso_local noundef zeroext i1 @_Z6searchP4TrieRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr nocapture noundef readonly %0, ptr noundef nonnull align 8 dereferenceable(32) %1) local_unnamed_addr #0 {
  %3 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #2
  %4 = trunc i64 %3 to i32
  %.not2225 = icmp sgt i32 %4, 0
  br i1 %.not2225, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = and i64 %3, 2147483647
  br label %.lr.ph

5:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.lr.ph.preheader, %5
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %5 ]
  %.01826 = phi ptr [ %0, %.lr.ph.preheader ], [ %11, %5 ]
  %6 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %indvars.iv)
  %7 = load i8, ptr %6, align 1, !tbaa !7
  %8 = sext i8 %7 to i64
  %9 = add nsw i64 %8, -97
  %10 = getelementptr inbounds [26 x ptr], ptr %.01826, i64 0, i64 %9
  %11 = load ptr, ptr %10, align 8, !tbaa !10
  %.not = icmp eq ptr %11, null
  br i1 %.not, label %.thread, label %5

._crit_edge:                                      ; preds = %5, %2
  %.018.lcssa = phi ptr [ %0, %2 ], [ %11, %5 ]
  %12 = getelementptr inbounds i8, ptr %.018.lcssa, i64 208
  %13 = load i8, ptr %12, align 8, !tbaa !12, !range !15, !noundef !16
  %14 = trunc nuw i8 %13 to i1
  br label %.thread

.thread:                                          ; preds = %.lr.ph, %._crit_edge
  %.3 = phi i1 [ %14, %._crit_edge ], [ false, %.lr.ph ]
  ret i1 %.3
}

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) local_unnamed_addr #0 align 2

attributes #0 = { 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" }
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 = { 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!11, !11, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!13, !14, i64 208}
!13 = !{!"_ZTS4Trie", !8, i64 0, !14, i64 208}
!14 = !{!"bool", !8, i64 0}
!15 = !{i8 0, i8 2}
!16 = !{}


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