; LLVM IR from eyangch/competitive-programming :: USACOtraining/1.2/gift1.ll/Z9getPersonNSt7 (cxx1112basic_stringIcSt11char_traitsIcESaIcEEE)

; 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::array" = type { [10 x %"class.std::__cxx11::basic_string"] }
%"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] }

@_Z6peopleB5cxx11 = external dso_local global %"struct.std::array", align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z9getPersonNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %18, %1
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = icmp slt i32 %7, 10
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  store i32 2, ptr %5, align 4
  br label %21

10:                                               ; preds = %6
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = sext i32 %11 to i64
  %13 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320) @_Z6peopleB5cxx11, i64 noundef %12) #3
  %14 = call noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %13) #3
  br i1 %14, label %15, label %17

15:                                               ; preds = %10
  %16 = load i32, ptr %4, align 4, !tbaa !9
  store i32 %16, ptr %3, align 4, !tbaa !9
  store i32 2, ptr %5, align 4
  br label %21

17:                                               ; preds = %10
  br label %18

18:                                               ; preds = %17
  %19 = load i32, ptr %4, align 4, !tbaa !9
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !11

21:                                               ; preds = %15, %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %22

22:                                               ; preds = %21
  %23 = load i32, ptr %3, align 4, !tbaa !9
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret i32 %23
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320), 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 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 = { inlinehint 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 = distinct !{!11, !12}
!12 = !{!"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"

%"struct.std::array" = type { [10 x %"class.std::__cxx11::basic_string"] }
%"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] }

@_Z6peopleB5cxx11 = external dso_local global %"struct.std::array", align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z9getPersonNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %0) local_unnamed_addr #0 {
  %2 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320) @_Z6peopleB5cxx11, i64 noundef 0) #2
  %3 = tail call noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %2) #2
  br i1 %3, label %31, label %4

4:                                                ; preds = %1
  %5 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320) @_Z6peopleB5cxx11, i64 noundef 1) #2
  %6 = tail call noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %5) #2
  br i1 %6, label %31, label %7

7:                                                ; preds = %4
  %8 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320) @_Z6peopleB5cxx11, i64 noundef 2) #2
  %9 = tail call noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %8) #2
  br i1 %9, label %31, label %10

10:                                               ; preds = %7
  %11 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320) @_Z6peopleB5cxx11, i64 noundef 3) #2
  %12 = tail call noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %11) #2
  br i1 %12, label %31, label %13

13:                                               ; preds = %10
  %14 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320) @_Z6peopleB5cxx11, i64 noundef 4) #2
  %15 = tail call noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %14) #2
  br i1 %15, label %31, label %16

16:                                               ; preds = %13
  %17 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320) @_Z6peopleB5cxx11, i64 noundef 5) #2
  %18 = tail call noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %17) #2
  br i1 %18, label %31, label %19

19:                                               ; preds = %16
  %20 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320) @_Z6peopleB5cxx11, i64 noundef 6) #2
  %21 = tail call noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %20) #2
  br i1 %21, label %31, label %22

22:                                               ; preds = %19
  %23 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320) @_Z6peopleB5cxx11, i64 noundef 7) #2
  %24 = tail call noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %23) #2
  br i1 %24, label %31, label %25

25:                                               ; preds = %22
  %26 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320) @_Z6peopleB5cxx11, i64 noundef 8) #2
  %27 = tail call noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %26) #2
  br i1 %27, label %31, label %28

28:                                               ; preds = %25
  %29 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320) @_Z6peopleB5cxx11, i64 noundef 9) #2
  %30 = tail call noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %29) #2
  %spec.select = select i1 %30, i32 9, i32 10
  br label %31

31:                                               ; preds = %28, %25, %22, %19, %16, %13, %10, %7, %4, %1
  %.0.lcssa = phi i32 [ 0, %1 ], [ 1, %4 ], [ 2, %7 ], [ 3, %10 ], [ 4, %13 ], [ 5, %16 ], [ 6, %19 ], [ 7, %22 ], [ 8, %25 ], [ %spec.select, %28 ]
  ret i32 %.0.lcssa
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZSteqIcEN9__gnu_cxx11__enable_ifIXsr9__is_charIT_EE7__valueEbE6__typeERKNSt7__cxx1112basic_stringIS2_St11char_traitsIS2_ESaIS2_EEESC_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt5arrayINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELm10EEixEm(ptr noundef nonnull align 8 dereferenceable(320), i64 noundef) local_unnamed_addr #0 align 2

attributes #0 = { 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 #1 = { inlinehint 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)"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LoopRotatePass,SROAPass,SimplifyCFGPass,TailCallElimPass