; LLVM IR from ravireddy07/cpp-book :: src/Common-Problems (trie)

; 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.std::__detail::_Node_iterator" = type { %"struct.std::__detail::_Node_iterator_base" }
%"struct.std::__detail::_Node_iterator_base" = type { ptr }
%class.Node = type { i8, i8, %"class.std::unordered_map" }
%"class.std::unordered_map" = type { %"class.std::_Hashtable" }
%"class.std::_Hashtable" = type { ptr, i64, %"struct.std::__detail::_Hash_node_base", i64, %"struct.std::__detail::_Prime_rehash_policy", ptr }
%"struct.std::__detail::_Hash_node_base" = type { ptr }
%"struct.std::__detail::_Prime_rehash_policy" = type { float, i64 }

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

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

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

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEE4findERS7_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 1 dereferenceable(1)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEE3endEv(ptr noundef nonnull align 8 dereferenceable(56)) #1 align 2

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEEixERS7_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 1 dereferenceable(1)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z6searchP4NodeNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %0, ptr noundef %1) #2 {
  %3 = alloca i1, align 1
  %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
  %9 = alloca i8, align 1
  %10 = alloca %"struct.std::__detail::_Node_iterator", align 8
  %11 = alloca %"struct.std::__detail::_Node_iterator", align 8
  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) #3
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %12, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %45, %2
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #3
  %17 = icmp ult i64 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %13
  store i32 2, ptr %8, align 4
  br label %48

19:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 1, ptr %9) #3
  %20 = load i32, ptr %7, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %21)
  %23 = load i8, ptr %22, align 1, !tbaa !11
  store i8 %23, ptr %9, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = getelementptr inbounds %class.Node, ptr %24, i32 0, i32 2
  %26 = call ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEE4findERS7_(ptr noundef nonnull align 8 dereferenceable(56) %25, ptr noundef nonnull align 1 dereferenceable(1) %9)
  %27 = getelementptr inbounds %"struct.std::__detail::_Node_iterator", ptr %10, i32 0, i32 0
  %28 = getelementptr inbounds %"struct.std::__detail::_Node_iterator_base", ptr %27, i32 0, i32 0
  store ptr %26, ptr %28, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = getelementptr inbounds %class.Node, ptr %29, i32 0, i32 2
  %31 = call ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEE3endEv(ptr noundef nonnull align 8 dereferenceable(56) %30) #3
  %32 = getelementptr inbounds %"struct.std::__detail::_Node_iterator", ptr %11, i32 0, i32 0
  %33 = getelementptr inbounds %"struct.std::__detail::_Node_iterator_base", ptr %32, i32 0, i32 0
  store ptr %31, ptr %33, align 8
  %34 = call noundef zeroext i1 @_ZNSt8__detaileqERKNS_19_Node_iterator_baseISt4pairIKcP4NodeELb0EEES8_(ptr noundef nonnull align 8 dereferenceable(8) %10, ptr noundef nonnull align 8 dereferenceable(8) %11) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  br i1 %34, label %35, label %36

35:                                               ; preds = %19
  store i1 false, ptr %3, align 1
  store i32 1, ptr %8, align 4
  br label %42

36:                                               ; preds = %19
  %37 = load ptr, ptr %6, align 8, !tbaa !5
  %38 = getelementptr inbounds %class.Node, ptr %37, i32 0, i32 2
  %39 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEEixERS7_(ptr noundef nonnull align 8 dereferenceable(56) %38, ptr noundef nonnull align 1 dereferenceable(1) %9)
  %40 = load ptr, ptr %39, align 8, !tbaa !5
  store ptr %40, ptr %6, align 8, !tbaa !5
  br label %41

41:                                               ; preds = %36
  store i32 0, ptr %8, align 4
  br label %42

42:                                               ; preds = %41, %35
  call void @llvm.lifetime.end.p0(i64 1, ptr %9) #3
  %43 = load i32, ptr %8, align 4
  switch i32 %43, label %48 [
    i32 0, label %44
  ]

44:                                               ; preds = %42
  br label %45

45:                                               ; preds = %44
  %46 = load i32, ptr %7, align 4, !tbaa !9
  %47 = add nsw i32 %46, 1
  store i32 %47, ptr %7, align 4, !tbaa !9
  br label %13, !llvm.loop !12

48:                                               ; preds = %42, %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  %49 = load i32, ptr %8, align 4
  switch i32 %49, label %55 [
    i32 2, label %50
  ]

50:                                               ; preds = %48
  %51 = load ptr, ptr %6, align 8, !tbaa !5
  %52 = getelementptr inbounds %class.Node, ptr %51, i32 0, i32 1
  %53 = load i8, ptr %52, align 1, !tbaa !14, !range !23, !noundef !24
  %54 = trunc i8 %53 to i1
  store i1 %54, ptr %3, align 1
  store i32 1, ptr %8, align 4
  br label %55

55:                                               ; preds = %50, %48
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %56 = load i1, ptr %3, align 1
  ret i1 %56
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNSt8__detaileqERKNS_19_Node_iterator_baseISt4pairIKcP4NodeELb0EEES8_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #1

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 = { 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 #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 1}
!15 = !{!"_ZTS4Node", !7, i64 0, !16, i64 1, !17, i64 8}
!16 = !{!"bool", !7, i64 0}
!17 = !{!"_ZTSSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEE", !18, i64 0}
!18 = !{!"_ZTSSt10_HashtableIcSt4pairIKcP4NodeESaIS4_ENSt8__detail10_Select1stESt8equal_toIcESt4hashIcENS6_18_Mod_range_hashingENS6_20_Default_ranged_hashENS6_20_Prime_rehash_policyENS6_17_Hashtable_traitsILb0ELb0ELb1EEEE", !6, i64 0, !19, i64 8, !20, i64 16, !19, i64 24, !21, i64 32, !6, i64 48}
!19 = !{!"long", !7, i64 0}
!20 = !{!"_ZTSNSt8__detail15_Hash_node_baseE", !6, i64 0}
!21 = !{!"_ZTSNSt8__detail20_Prime_rehash_policyE", !22, i64 0, !19, i64 8}
!22 = !{!"float", !7, i64 0}
!23 = !{i8 0, i8 2}
!24 = !{}


; 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"

%"struct.std::__detail::_Node_iterator" = type { %"struct.std::__detail::_Node_iterator_base" }
%"struct.std::__detail::_Node_iterator_base" = type { ptr }

; 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 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 nounwind 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 #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEE4findERS7_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 1 dereferenceable(1)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEE3endEv(ptr noundef nonnull align 8 dereferenceable(56)) local_unnamed_addr #1 align 2

; 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 uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEEixERS7_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 1 dereferenceable(1)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z6searchP4NodeNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %0, ptr noundef nonnull %1) local_unnamed_addr #2 {
  %3 = alloca i8, align 1
  %4 = alloca %"struct.std::__detail::_Node_iterator", align 8
  %5 = alloca %"struct.std::__detail::_Node_iterator", align 8
  %6 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #3
  %.not22.not = icmp eq i64 %6, 0
  br i1 %.not22.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %13
  %indvars.iv = phi i64 [ %indvars.iv.next, %13 ], [ 0, %2 ]
  %.01223 = phi ptr [ %15, %13 ], [ %0, %2 ]
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %3) #3
  %7 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %indvars.iv)
  %8 = load i8, ptr %7, align 1, !tbaa !5
  store i8 %8, ptr %3, align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %9 = getelementptr inbounds i8, ptr %.01223, i64 8
  %10 = call ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEE4findERS7_(ptr noundef nonnull align 8 dereferenceable(56) %9, ptr noundef nonnull align 1 dereferenceable(1) %3)
  store ptr %10, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  %11 = call ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEE3endEv(ptr noundef nonnull align 8 dereferenceable(56) %9) #3
  store ptr %11, ptr %5, align 8
  %12 = call noundef zeroext i1 @_ZNSt8__detaileqERKNS_19_Node_iterator_baseISt4pairIKcP4NodeELb0EEES8_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  br i1 %12, label %.thread19, label %13

.thread19:                                        ; preds = %.lr.ph
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #3
  br label %20

13:                                               ; preds = %.lr.ph
  %14 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEEixERS7_(ptr noundef nonnull align 8 dereferenceable(56) %9, ptr noundef nonnull align 1 dereferenceable(1) %3)
  %15 = load ptr, ptr %14, align 8, !tbaa !8
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #3
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %16 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #3
  %.not = icmp ugt i64 %16, %indvars.iv.next
  br i1 %.not, label %.lr.ph, label %._crit_edge, !llvm.loop !10

._crit_edge:                                      ; preds = %13, %2
  %.012.lcssa = phi ptr [ %0, %2 ], [ %15, %13 ]
  %17 = getelementptr inbounds i8, ptr %.012.lcssa, i64 1
  %18 = load i8, ptr %17, align 1, !tbaa !12, !range !21, !noundef !22
  %19 = trunc nuw i8 %18 to i1
  br label %20

20:                                               ; preds = %.thread19, %._crit_edge
  %.3 = phi i1 [ %19, %._crit_edge ], [ false, %.thread19 ]
  ret i1 %.3
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNSt8__detaileqERKNS_19_Node_iterator_baseISt4pairIKcP4NodeELb0EEES8_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1

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 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"any pointer", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = !{!13, !14, i64 1}
!13 = !{!"_ZTS4Node", !6, i64 0, !14, i64 1, !15, i64 8}
!14 = !{!"bool", !6, i64 0}
!15 = !{!"_ZTSSt13unordered_mapIcP4NodeSt4hashIcESt8equal_toIcESaISt4pairIKcS1_EEE", !16, i64 0}
!16 = !{!"_ZTSSt10_HashtableIcSt4pairIKcP4NodeESaIS4_ENSt8__detail10_Select1stESt8equal_toIcESt4hashIcENS6_18_Mod_range_hashingENS6_20_Default_ranged_hashENS6_20_Prime_rehash_policyENS6_17_Hashtable_traitsILb0ELb0ELb1EEEE", !9, i64 0, !17, i64 8, !18, i64 16, !17, i64 24, !19, i64 32, !9, i64 48}
!17 = !{!"long", !6, i64 0}
!18 = !{!"_ZTSNSt8__detail15_Hash_node_baseE", !9, i64 0}
!19 = !{!"_ZTSNSt8__detail20_Prime_rehash_policyE", !20, i64 0, !17, i64 8}
!20 = !{!"float", !6, i64 0}
!21 = !{i8 0, i8 2}
!22 = !{}


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