; LLVM IR from upupming/algorithm :: bytedance/2021ByteCamp/a. 最短全集子串 (main)

; 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::unordered_set" = 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 }
%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"struct.std::pair" = type <{ %"struct.std::__detail::_Node_iterator", i8, [7 x i8] }>
%"struct.std::__detail::_Node_iterator" = type { %"struct.std::__detail::_Node_iterator_base" }
%"struct.std::__detail::_Node_iterator_base" = type { ptr }

@_Z1sB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@sum = external dso_local global [26 x [100000 x i32]], align 16
@n = external dso_local global i32, align 4
@pos = external dso_local global i32, align 4
@len = external dso_local global i32, align 4
@st = external dso_local global %"class.std::unordered_set", align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z5validii(i32 noundef, i32 noundef) #0

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

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

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %1 = alloca i32, align 4
  %2 = alloca %"class.std::__cxx11::basic_string", align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %"struct.std::pair", align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %13 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11)
  %14 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11) #6
  %15 = trunc i64 %14 to i32
  store i32 %15, ptr @n, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr %2) #6
  call void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EES5_RKS8_(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %2, i8 noundef signext 32, ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11)
  %16 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, ptr noundef nonnull align 8 dereferenceable(32) %2) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %2) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr %2) #6
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #6
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %72, %0
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = load i32, ptr @n, align 4, !tbaa !5
  %20 = icmp sle i32 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  store i32 2, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #6
  br label %75

22:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #6
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %60, %22
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = icmp slt i32 %24, 26
  br i1 %25, label %27, label %26

26:                                               ; preds = %23
  store i32 5, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #6
  br label %63

27:                                               ; preds = %23
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [26 x [100000 x i32]], ptr @sum, i64 0, i64 %29
  %31 = load i32, ptr %3, align 4, !tbaa !5
  %32 = sub nsw i32 %31, 1
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [100000 x i32], ptr %30, i64 0, i64 %33
  %35 = load i32, ptr %34, align 4, !tbaa !5
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [26 x [100000 x i32]], ptr @sum, i64 0, i64 %37
  %39 = load i32, ptr %3, align 4, !tbaa !5
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [100000 x i32], ptr %38, i64 0, i64 %40
  store i32 %35, ptr %41, align 4, !tbaa !5
  %42 = load i32, ptr %5, align 4, !tbaa !5
  %43 = load i32, ptr %3, align 4, !tbaa !5
  %44 = sext i32 %43 to i64
  %45 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %44)
  %46 = load i8, ptr %45, align 1, !tbaa !9
  %47 = sext i8 %46 to i32
  %48 = sub nsw i32 %47, 97
  %49 = icmp eq i32 %42, %48
  br i1 %49, label %50, label %59

50:                                               ; preds = %27
  %51 = load i32, ptr %5, align 4, !tbaa !5
  %52 = sext i32 %51 to i64
  %53 = getelementptr inbounds [26 x [100000 x i32]], ptr @sum, i64 0, i64 %52
  %54 = load i32, ptr %3, align 4, !tbaa !5
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [100000 x i32], ptr %53, i64 0, i64 %55
  %57 = load i32, ptr %56, align 4, !tbaa !5
  %58 = add nsw i32 %57, 1
  store i32 %58, ptr %56, align 4, !tbaa !5
  br label %59

59:                                               ; preds = %50, %27
  br label %60

60:                                               ; preds = %59
  %61 = load i32, ptr %5, align 4, !tbaa !5
  %62 = add nsw i32 %61, 1
  store i32 %62, ptr %5, align 4, !tbaa !5
  br label %23, !llvm.loop !10

63:                                               ; preds = %26
  %64 = load i32, ptr %3, align 4, !tbaa !5
  %65 = sext i32 %64 to i64
  %66 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %65)
  %67 = call { ptr, i8 } @_ZNSt13unordered_setIcSt4hashIcESt8equal_toIcESaIcEE6insertERKc(ptr noundef nonnull align 8 dereferenceable(56) @st, ptr noundef nonnull align 1 dereferenceable(1) %66)
  %68 = getelementptr inbounds { ptr, i8 }, ptr %6, i32 0, i32 0
  %69 = extractvalue { ptr, i8 } %67, 0
  store ptr %69, ptr %68, align 8
  %70 = getelementptr inbounds { ptr, i8 }, ptr %6, i32 0, i32 1
  %71 = extractvalue { ptr, i8 } %67, 1
  store i8 %71, ptr %70, align 8
  br label %72

72:                                               ; preds = %63
  %73 = load i32, ptr %3, align 4, !tbaa !5
  %74 = add nsw i32 %73, 1
  store i32 %74, ptr %3, align 4, !tbaa !5
  br label %17, !llvm.loop !12

75:                                               ; preds = %21
  store i32 1, ptr @pos, align 4, !tbaa !5
  %76 = load i32, ptr @n, align 4, !tbaa !5
  store i32 %76, ptr @len, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #6
  store i32 1, ptr %7, align 4, !tbaa !5
  br label %77

77:                                               ; preds = %124, %75
  %78 = load i32, ptr %7, align 4, !tbaa !5
  %79 = load i32, ptr @n, align 4, !tbaa !5
  %80 = icmp sle i32 %78, %79
  br i1 %80, label %82, label %81

81:                                               ; preds = %77
  store i32 8, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #6
  br label %127

82:                                               ; preds = %77
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #6
  %83 = load i32, ptr %7, align 4, !tbaa !5
  store i32 %83, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #6
  %84 = load i32, ptr @n, align 4, !tbaa !5
  store i32 %84, ptr %9, align 4, !tbaa !5
  %85 = load i32, ptr %7, align 4, !tbaa !5
  %86 = load i32, ptr %9, align 4, !tbaa !5
  %87 = call noundef zeroext i1 @_Z5validii(i32 noundef %85, i32 noundef %86)
  br i1 %87, label %89, label %88

88:                                               ; preds = %82
  store i32 10, ptr %4, align 4
  br label %121

89:                                               ; preds = %82
  br label %90

90:                                               ; preds = %107, %89
  %91 = load i32, ptr %8, align 4, !tbaa !5
  %92 = load i32, ptr %9, align 4, !tbaa !5
  %93 = icmp slt i32 %91, %92
  br i1 %93, label %94, label %108

94:                                               ; preds = %90
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #6
  %95 = load i32, ptr %8, align 4, !tbaa !5
  %96 = load i32, ptr %9, align 4, !tbaa !5
  %97 = add nsw i32 %95, %96
  %98 = ashr i32 %97, 1
  store i32 %98, ptr %10, align 4, !tbaa !5
  %99 = load i32, ptr %7, align 4, !tbaa !5
  %100 = load i32, ptr %10, align 4, !tbaa !5
  %101 = call noundef zeroext i1 @_Z5validii(i32 noundef %99, i32 noundef %100)
  br i1 %101, label %102, label %104

102:                                              ; preds = %94
  %103 = load i32, ptr %10, align 4, !tbaa !5
  store i32 %103, ptr %9, align 4, !tbaa !5
  br label %107

104:                                              ; preds = %94
  %105 = load i32, ptr %10, align 4, !tbaa !5
  %106 = add nsw i32 %105, 1
  store i32 %106, ptr %8, align 4, !tbaa !5
  br label %107

107:                                              ; preds = %104, %102
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #6
  br label %90, !llvm.loop !13

108:                                              ; preds = %90
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #6
  %109 = load i32, ptr %8, align 4, !tbaa !5
  %110 = load i32, ptr %7, align 4, !tbaa !5
  %111 = sub nsw i32 %109, %110
  %112 = add nsw i32 %111, 1
  store i32 %112, ptr %11, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #6
  %113 = load i32, ptr %7, align 4, !tbaa !5
  store i32 %113, ptr %12, align 4, !tbaa !5
  %114 = load i32, ptr %11, align 4, !tbaa !5
  %115 = load i32, ptr @len, align 4, !tbaa !5
  %116 = icmp slt i32 %114, %115
  br i1 %116, label %117, label %120

117:                                              ; preds = %108
  %118 = load i32, ptr %7, align 4, !tbaa !5
  store i32 %118, ptr @pos, align 4, !tbaa !5
  %119 = load i32, ptr %11, align 4, !tbaa !5
  store i32 %119, ptr @len, align 4, !tbaa !5
  br label %120

120:                                              ; preds = %117, %108
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #6
  store i32 0, ptr %4, align 4
  br label %121

121:                                              ; preds = %120, %88
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #6
  %122 = load i32, ptr %4, align 4
  switch i32 %122, label %135 [
    i32 0, label %123
    i32 10, label %124
  ]

123:                                              ; preds = %121
  br label %124

124:                                              ; preds = %123, %121
  %125 = load i32, ptr %7, align 4, !tbaa !5
  %126 = add nsw i32 %125, 1
  store i32 %126, ptr %7, align 4, !tbaa !5
  br label %77, !llvm.loop !14

127:                                              ; preds = %81
  %128 = load i32, ptr @pos, align 4, !tbaa !5
  %129 = sub nsw i32 %128, 1
  %130 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %129)
  %131 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %130, ptr noundef @.str)
  %132 = load i32, ptr @len, align 4, !tbaa !5
  %133 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %131, i32 noundef %132)
  %134 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %133, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  ret i32 0

135:                                              ; preds = %121
  unreachable
}

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(32)) #3

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EES5_RKS8_(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, i8 noundef signext, ptr noundef nonnull align 8 dereferenceable(32)) #4

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) #0 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) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt13unordered_setIcSt4hashIcESt8equal_toIcESaIcEE6insertERKc(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 1 dereferenceable(1)) #4 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #5

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #3

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #4 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #5

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 = { mustprogress norecurse 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 = { "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 #4 = { 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 #5 = { inlinehint 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 #6 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}
!13 = distinct !{!13, !11}
!14 = distinct !{!14, !11}


; 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::unordered_set" = 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 }
%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@_Z1sB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@sum = external dso_local local_unnamed_addr global [26 x [100000 x i32]], align 16
@n = external dso_local local_unnamed_addr global i32, align 4
@pos = external dso_local local_unnamed_addr global i32, align 4
@len = external dso_local local_unnamed_addr global i32, align 4
@st = external dso_local global %"class.std::unordered_set", align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z5validii(i32 noundef, i32 noundef) local_unnamed_addr #0

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

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

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca %"class.std::__cxx11::basic_string", align 8
  %2 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11)
  %3 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11) #6
  %4 = trunc i64 %3 to i32
  store i32 %4, ptr @n, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %1) #6
  call void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EES5_RKS8_(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %1, i8 noundef signext 32, ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11)
  %5 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, ptr noundef nonnull align 8 dereferenceable(32) %1) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %1) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %1) #6
  %6 = load i32, ptr @n, align 4, !tbaa !5
  %.not42 = icmp slt i32 %6, 1
  br i1 %.not42, label %._crit_edge.thread, label %.preheader40

._crit_edge.thread:                               ; preds = %0
  store i32 1, ptr @pos, align 4, !tbaa !5
  store i32 %6, ptr @len, align 4, !tbaa !5
  br label %._crit_edge52

.preheader40:                                     ; preds = %0, %8
  %indvars.iv55 = phi i64 [ %indvars.iv.next56, %8 ], [ 1, %0 ]
  %7 = add nsw i64 %indvars.iv55, -1
  br label %13

._crit_edge:                                      ; preds = %8
  store i32 1, ptr @pos, align 4, !tbaa !5
  store i32 %11, ptr @len, align 4, !tbaa !5
  %.not3948 = icmp slt i32 %11, 1
  br i1 %.not3948, label %._crit_edge52, label %.lr.ph51

8:                                                ; preds = %26
  %9 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %indvars.iv55)
  %10 = call { ptr, i8 } @_ZNSt13unordered_setIcSt4hashIcESt8equal_toIcESaIcEE6insertERKc(ptr noundef nonnull align 8 dereferenceable(56) @st, ptr noundef nonnull align 1 dereferenceable(1) %9)
  %indvars.iv.next56 = add nuw nsw i64 %indvars.iv55, 1
  %11 = load i32, ptr @n, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %.not.not = icmp slt i64 %indvars.iv55, %12
  br i1 %.not.not, label %.preheader40, label %._crit_edge, !llvm.loop !9

13:                                               ; preds = %.preheader40, %26
  %indvars.iv = phi i64 [ 0, %.preheader40 ], [ %indvars.iv.next, %26 ]
  %14 = getelementptr inbounds [26 x [100000 x i32]], ptr @sum, i64 0, i64 %indvars.iv, i64 %7
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = getelementptr inbounds [26 x [100000 x i32]], ptr @sum, i64 0, i64 %indvars.iv, i64 %indvars.iv55
  store i32 %15, ptr %16, align 4, !tbaa !5
  %17 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %indvars.iv55)
  %18 = load i8, ptr %17, align 1, !tbaa !11
  %19 = sext i8 %18 to i64
  %20 = add nsw i64 %19, 4294967199
  %21 = and i64 %20, 4294967295
  %22 = icmp eq i64 %indvars.iv, %21
  br i1 %22, label %23, label %26

23:                                               ; preds = %13
  %24 = load i32, ptr %16, align 4, !tbaa !5
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %16, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %13, %23
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 26
  br i1 %exitcond.not, label %8, label %13, !llvm.loop !12

._crit_edge52.loopexit:                           ; preds = %47
  %.pre = load i32, ptr @pos, align 4, !tbaa !5
  %27 = add nsw i32 %.pre, -1
  br label %._crit_edge52

._crit_edge52:                                    ; preds = %._crit_edge.thread, %._crit_edge52.loopexit, %._crit_edge
  %28 = phi i32 [ %27, %._crit_edge52.loopexit ], [ 0, %._crit_edge ], [ 0, %._crit_edge.thread ]
  %29 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %28)
  %30 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %29, ptr noundef nonnull @.str)
  %31 = load i32, ptr @len, align 4, !tbaa !5
  %32 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %30, i32 noundef %31)
  %33 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %32, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  ret i32 0

.lr.ph51:                                         ; preds = %._crit_edge, %47
  %34 = phi i32 [ %49, %47 ], [ %11, %._crit_edge ]
  %.03649 = phi i32 [ %48, %47 ], [ 1, %._crit_edge ]
  %35 = call noundef zeroext i1 @_Z5validii(i32 noundef %.03649, i32 noundef %34)
  br i1 %35, label %.preheader, label %47

.preheader:                                       ; preds = %.lr.ph51
  %36 = icmp slt i32 %.03649, %34
  br i1 %36, label %.lr.ph, label %._crit_edge46

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %.03345 = phi i32 [ %.1, %.lr.ph ], [ %34, %.preheader ]
  %.03444 = phi i32 [ %.135, %.lr.ph ], [ %.03649, %.preheader ]
  %37 = add nsw i32 %.03345, %.03444
  %38 = ashr i32 %37, 1
  %39 = call noundef zeroext i1 @_Z5validii(i32 noundef %.03649, i32 noundef %38)
  %40 = add nsw i32 %38, 1
  %.135 = select i1 %39, i32 %.03444, i32 %40
  %.1 = select i1 %39, i32 %38, i32 %.03345
  %41 = icmp slt i32 %.135, %.1
  br i1 %41, label %.lr.ph, label %._crit_edge46, !llvm.loop !13

._crit_edge46:                                    ; preds = %.lr.ph, %.preheader
  %.034.lcssa = phi i32 [ %.03649, %.preheader ], [ %.135, %.lr.ph ]
  %42 = sub nsw i32 %.034.lcssa, %.03649
  %43 = add nsw i32 %42, 1
  %44 = load i32, ptr @len, align 4, !tbaa !5
  %45 = icmp slt i32 %43, %44
  br i1 %45, label %46, label %47

46:                                               ; preds = %._crit_edge46
  store i32 %.03649, ptr @pos, align 4, !tbaa !5
  store i32 %43, ptr @len, align 4, !tbaa !5
  br label %47

47:                                               ; preds = %._crit_edge46, %46, %.lr.ph51
  %48 = add nuw nsw i32 %.03649, 1
  %49 = load i32, ptr @n, align 4, !tbaa !5
  %.not39.not = icmp slt i32 %.03649, %49
  br i1 %.not39.not, label %.lr.ph51, label %._crit_edge52.loopexit, !llvm.loop !14
}

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EES5_RKS8_(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, i8 noundef signext, ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #4

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #0 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 #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt13unordered_setIcSt4hashIcESt8equal_toIcESaIcEE6insertERKc(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 1 dereferenceable(1)) local_unnamed_addr #4 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #5

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #4 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #5

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress norecurse 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 = { "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 #4 = { 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 #5 = { inlinehint 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 #6 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !10}
!13 = distinct !{!13, !10}
!14 = distinct !{!14, !10}


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