; LLVM IR from VastoLorde95/Competitive-Programming :: Hackerrank/Codesprints 2016/Codesprint Aug/Problem G (brute)

; 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"

%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"class.std::allocator.3" = type { i8 }
%"struct.PalindromicTree::Node" = type { i32, i32, i64, i64, ptr, %"class.std::map", %"class.std::vector" }
%"class.std::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<char, std::pair<const char, PalindromicTree::Node *>, std::_Select1st<std::pair<const char, PalindromicTree::Node *>>, std::less<char>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<char, std::pair<const char, PalindromicTree::Node *>, std::_Select1st<std::pair<const char, PalindromicTree::Node *>>, std::less<char>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<PalindromicTree::Node *, std::allocator<PalindromicTree::Node *>>::_Vector_impl" }
%"struct.std::_Vector_base<PalindromicTree::Node *, std::allocator<PalindromicTree::Node *>>::_Vector_impl" = type { %"struct.std::_Vector_base<PalindromicTree::Node *, std::allocator<PalindromicTree::Node *>>::_Vector_impl_data" }
%"struct.std::_Vector_base<PalindromicTree::Node *, std::allocator<PalindromicTree::Node *>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@_ZN15PalindromicTree1sB5cxx11E = external dso_local global %"class.std::__cxx11::basic_string", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1

declare i32 @__gxx_personality_v0(...)

; 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: mustprogress uwtable
define dso_local void @_ZN15PalindromicTree4showB5cxx11EPNS_4NodeE(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef %1) #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca %"class.std::allocator.3", align 1
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8
  store ptr %1, ptr %4, align 8, !tbaa !5
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %"struct.PalindromicTree::Node", ptr %8, i32 0, i32 1
  %10 = load i32, ptr %9, align 4, !tbaa !9
  %11 = icmp slt i32 %10, 0
  br i1 %11, label %12, label %18

12:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #3
  call void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #3
  invoke void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2IS3_EEPKcRKS3_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str, ptr noundef nonnull align 1 dereferenceable(1) %5)
          to label %13 unwind label %14

13:                                               ; preds = %12
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #3
  br label %32

14:                                               ; preds = %12
  %15 = landingpad { ptr, i32 }
          cleanup
  %16 = extractvalue { ptr, i32 } %15, 0
  store ptr %16, ptr %6, align 8
  %17 = extractvalue { ptr, i32 } %15, 1
  store i32 %17, ptr %7, align 4
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #3
  br label %33

18:                                               ; preds = %2
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = getelementptr inbounds %"struct.PalindromicTree::Node", ptr %19, i32 0, i32 1
  %21 = load i32, ptr %20, align 4, !tbaa !9
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = getelementptr inbounds %"struct.PalindromicTree::Node", ptr %22, i32 0, i32 0
  %24 = load i32, ptr %23, align 8, !tbaa !26
  %25 = sub nsw i32 %21, %24
  %26 = add nsw i32 %25, 1
  %27 = sext i32 %26 to i64
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = getelementptr inbounds %"struct.PalindromicTree::Node", ptr %28, i32 0, i32 0
  %30 = load i32, ptr %29, align 8, !tbaa !26
  %31 = sext i32 %30 to i64
  call void @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6substrEmm(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef nonnull align 8 dereferenceable(32) @_ZN15PalindromicTree1sB5cxx11E, i64 noundef %27, i64 noundef %31)
  br label %32

32:                                               ; preds = %18, %13
  ret void

33:                                               ; preds = %14
  %34 = load ptr, ptr %6, align 8
  %35 = load i32, ptr %7, align 4
  %36 = insertvalue { ptr, i32 } poison, ptr %34, 0
  %37 = insertvalue { ptr, i32 } %36, i32 %35, 1
  resume { ptr, i32 } %37
}

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2IS3_EEPKcRKS3_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef, ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6substrEmm(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(32), i64 noundef, i64 noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !11, i64 4}
!10 = !{!"_ZTSN15PalindromicTree4NodeE", !11, i64 0, !11, i64 4, !12, i64 8, !12, i64 16, !6, i64 24, !13, i64 32, !22, i64 80}
!11 = !{!"int", !7, i64 0}
!12 = !{!"long long", !7, i64 0}
!13 = !{!"_ZTSSt3mapIcPN15PalindromicTree4NodeESt4lessIcESaISt4pairIKcS2_EEE", !14, i64 0}
!14 = !{!"_ZTSSt8_Rb_treeIcSt4pairIKcPN15PalindromicTree4NodeEESt10_Select1stIS5_ESt4lessIcESaIS5_EE", !15, i64 0}
!15 = !{!"_ZTSNSt8_Rb_treeIcSt4pairIKcPN15PalindromicTree4NodeEESt10_Select1stIS5_ESt4lessIcESaIS5_EE13_Rb_tree_implIS9_Lb1EEE", !16, i64 0, !18, i64 8}
!16 = !{!"_ZTSSt20_Rb_tree_key_compareISt4lessIcEE", !17, i64 0}
!17 = !{!"_ZTSSt4lessIcE"}
!18 = !{!"_ZTSSt15_Rb_tree_header", !19, i64 0, !21, i64 32}
!19 = !{!"_ZTSSt18_Rb_tree_node_base", !20, i64 0, !6, i64 8, !6, i64 16, !6, i64 24}
!20 = !{!"_ZTSSt14_Rb_tree_color", !7, i64 0}
!21 = !{!"long", !7, i64 0}
!22 = !{!"_ZTSSt6vectorIPN15PalindromicTree4NodeESaIS2_EE", !23, i64 0}
!23 = !{!"_ZTSSt12_Vector_baseIPN15PalindromicTree4NodeESaIS2_EE", !24, i64 0}
!24 = !{!"_ZTSNSt12_Vector_baseIPN15PalindromicTree4NodeESaIS2_EE12_Vector_implE", !25, i64 0}
!25 = !{!"_ZTSNSt12_Vector_baseIPN15PalindromicTree4NodeESaIS2_EE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!26 = !{!10, !11, i64 0}


; 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"

%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"class.std::allocator.3" = type { i8 }

@_ZN15PalindromicTree1sB5cxx11E = external dso_local global %"class.std::__cxx11::basic_string", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1

declare i32 @__gxx_personality_v0(...)

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

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN15PalindromicTree4showB5cxx11EPNS_4NodeE(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr nocapture noundef readonly %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::allocator.3", align 1
  %4 = getelementptr inbounds i8, ptr %1, i64 4
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = icmp slt i32 %5, 0
  br i1 %6, label %7, label %11

7:                                                ; preds = %2
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %3) #3
  call void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %3) #3
  invoke void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2IS3_EEPKcRKS3_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull @.str, ptr noundef nonnull align 1 dereferenceable(1) %3)
          to label %8 unwind label %9

8:                                                ; preds = %7
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %3) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #3
  br label %17

9:                                                ; preds = %7
  %10 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %3) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #3
  resume { ptr, i32 } %10

11:                                               ; preds = %2
  %12 = load i32, ptr %1, align 8, !tbaa !25
  %13 = add nuw i32 %5, 1
  %14 = sub i32 %13, %12
  %15 = sext i32 %14 to i64
  %16 = sext i32 %12 to i64
  tail call void @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6substrEmm(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef nonnull align 8 dereferenceable(32) @_ZN15PalindromicTree1sB5cxx11E, i64 noundef %15, i64 noundef %16)
  br label %17

17:                                               ; preds = %11, %8
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2IS3_EEPKcRKS3_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef, ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6substrEmm(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(32), i64 noundef, i64 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !7, i64 4}
!6 = !{!"_ZTSN15PalindromicTree4NodeE", !7, i64 0, !7, i64 4, !10, i64 8, !10, i64 16, !11, i64 24, !12, i64 32, !21, i64 80}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"long long", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!"_ZTSSt3mapIcPN15PalindromicTree4NodeESt4lessIcESaISt4pairIKcS2_EEE", !13, i64 0}
!13 = !{!"_ZTSSt8_Rb_treeIcSt4pairIKcPN15PalindromicTree4NodeEESt10_Select1stIS5_ESt4lessIcESaIS5_EE", !14, i64 0}
!14 = !{!"_ZTSNSt8_Rb_treeIcSt4pairIKcPN15PalindromicTree4NodeEESt10_Select1stIS5_ESt4lessIcESaIS5_EE13_Rb_tree_implIS9_Lb1EEE", !15, i64 0, !17, i64 8}
!15 = !{!"_ZTSSt20_Rb_tree_key_compareISt4lessIcEE", !16, i64 0}
!16 = !{!"_ZTSSt4lessIcE"}
!17 = !{!"_ZTSSt15_Rb_tree_header", !18, i64 0, !20, i64 32}
!18 = !{!"_ZTSSt18_Rb_tree_node_base", !19, i64 0, !11, i64 8, !11, i64 16, !11, i64 24}
!19 = !{!"_ZTSSt14_Rb_tree_color", !8, i64 0}
!20 = !{!"long", !8, i64 0}
!21 = !{!"_ZTSSt6vectorIPN15PalindromicTree4NodeESaIS2_EE", !22, i64 0}
!22 = !{!"_ZTSSt12_Vector_baseIPN15PalindromicTree4NodeESaIS2_EE", !23, i64 0}
!23 = !{!"_ZTSNSt12_Vector_baseIPN15PalindromicTree4NodeESaIS2_EE12_Vector_implE", !24, i64 0}
!24 = !{!"_ZTSNSt12_Vector_baseIPN15PalindromicTree4NodeESaIS2_EE17_Vector_impl_dataE", !11, i64 0, !11, i64 8, !11, i64 16}
!25 = !{!6, !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass