; LLVM IR from JessonYue/LeetCodeLearning :: Array/zhanchengguo/0717-比较含退格的字符串 (backspaceCompare)

; 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::stack" = type { %"class.std::deque" }
%"class.std::deque" = type { %"class.std::_Deque_base" }
%"class.std::_Deque_base" = type { %"struct.std::_Deque_base<char, std::allocator<char>>::_Deque_impl" }
%"struct.std::_Deque_base<char, std::allocator<char>>::_Deque_impl" = type { %"struct.std::_Deque_base<char, std::allocator<char>>::_Deque_impl_data" }
%"struct.std::_Deque_base<char, std::allocator<char>>::_Deque_impl_data" = type { ptr, i64, %"struct.std::_Deque_iterator", %"struct.std::_Deque_iterator" }
%"struct.std::_Deque_iterator" = type { ptr, ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

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

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z16backspaceCompareNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES4_(ptr noundef %0, ptr noundef %1) #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca %"class.std::stack", align 8
  %7 = alloca %"class.std::stack", align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %12 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %13 = alloca i32, align 4
  %14 = alloca i8, align 1
  %15 = alloca ptr, align 8
  %16 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %17 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %18 = alloca i8, align 1
  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 80, ptr %6) #4
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
  call void @llvm.lifetime.start.p0(i64 80, ptr %7) #4
  invoke void @_ZNSt5stackIcSt5dequeIcSaIcEEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(80) %7)
          to label %19 unwind label %29

19:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  store ptr %0, ptr %10, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #4
  %20 = load ptr, ptr %10, align 8, !tbaa !5
  %21 = call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %20) #4
  %22 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %11, i32 0, i32 0
  store ptr %21, ptr %22, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #4
  %23 = load ptr, ptr %10, align 8, !tbaa !5
  %24 = call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE3endEv(ptr noundef nonnull align 8 dereferenceable(32) %23) #4
  %25 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %12, i32 0, i32 0
  store ptr %24, ptr %25, align 8
  br label %26

26:                                               ; preds = %56, %19
  %27 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEbRKNS_17__normal_iteratorIT_T0_EESD_(ptr noundef nonnull align 8 dereferenceable(8) %11, ptr noundef nonnull align 8 dereferenceable(8) %12) #4
  br i1 %27, label %33, label %28

28:                                               ; preds = %26
  store i32 2, ptr %13, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  br label %58

29:                                               ; preds = %2
  %30 = landingpad { ptr, i32 }
          cleanup
  %31 = extractvalue { ptr, i32 } %30, 0
  store ptr %31, ptr %8, align 8
  %32 = extractvalue { ptr, i32 } %30, 1
  store i32 %32, ptr %9, align 4
  br label %132

33:                                               ; preds = %26
  call void @llvm.lifetime.start.p0(i64 1, ptr %14) #4
  %34 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %11) #4
  %35 = load i8, ptr %34, align 1, !tbaa !9
  store i8 %35, ptr %14, align 1, !tbaa !9
  %36 = load i8, ptr %14, align 1, !tbaa !9
  %37 = sext i8 %36 to i32
  %38 = icmp ne i32 %37, 35
  br i1 %38, label %39, label %45

39:                                               ; preds = %33
  invoke void @_ZNSt5stackIcSt5dequeIcSaIcEEE4pushERKc(ptr noundef nonnull align 8 dereferenceable(80) %6, ptr noundef nonnull align 1 dereferenceable(1) %14)
          to label %40 unwind label %41

40:                                               ; preds = %39
  br label %52

41:                                               ; preds = %48, %45, %39
  %42 = landingpad { ptr, i32 }
          cleanup
  %43 = extractvalue { ptr, i32 } %42, 0
  store ptr %43, ptr %8, align 8
  %44 = extractvalue { ptr, i32 } %42, 1
  store i32 %44, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 1, ptr %14) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  br label %131

45:                                               ; preds = %33
  %46 = invoke noundef zeroext i1 @_ZNKSt5stackIcSt5dequeIcSaIcEEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
          to label %47 unwind label %41

47:                                               ; preds = %45
  br i1 %46, label %50, label %48

48:                                               ; preds = %47
  invoke void @_ZNSt5stackIcSt5dequeIcSaIcEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
          to label %49 unwind label %41

49:                                               ; preds = %48
  br label %51

50:                                               ; preds = %47
  store i32 3, ptr %13, align 4
  br label %53

51:                                               ; preds = %49
  br label %52

52:                                               ; preds = %51, %40
  store i32 0, ptr %13, align 4
  br label %53

53:                                               ; preds = %52, %50
  call void @llvm.lifetime.end.p0(i64 1, ptr %14) #4
  %54 = load i32, ptr %13, align 4
  switch i32 %54, label %138 [
    i32 0, label %55
    i32 3, label %56
  ]

55:                                               ; preds = %53
  br label %56

56:                                               ; preds = %55, %53
  %57 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %11) #4
  br label %26

58:                                               ; preds = %28
  call void @llvm.lifetime.start.p0(i64 8, ptr %15) #4
  store ptr %1, ptr %15, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %16) #4
  %59 = load ptr, ptr %15, align 8, !tbaa !5
  %60 = call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %59) #4
  %61 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %16, i32 0, i32 0
  store ptr %60, ptr %61, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %17) #4
  %62 = load ptr, ptr %15, align 8, !tbaa !5
  %63 = call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE3endEv(ptr noundef nonnull align 8 dereferenceable(32) %62) #4
  %64 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %17, i32 0, i32 0
  store ptr %63, ptr %64, align 8
  br label %65

65:                                               ; preds = %91, %58
  %66 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEbRKNS_17__normal_iteratorIT_T0_EESD_(ptr noundef nonnull align 8 dereferenceable(8) %16, ptr noundef nonnull align 8 dereferenceable(8) %17) #4
  br i1 %66, label %68, label %67

67:                                               ; preds = %65
  store i32 4, ptr %13, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %17) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %16) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %15) #4
  br label %93

68:                                               ; preds = %65
  call void @llvm.lifetime.start.p0(i64 1, ptr %18) #4
  %69 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %16) #4
  %70 = load i8, ptr %69, align 1, !tbaa !9
  store i8 %70, ptr %18, align 1, !tbaa !9
  %71 = load i8, ptr %18, align 1, !tbaa !9
  %72 = sext i8 %71 to i32
  %73 = icmp ne i32 %72, 35
  br i1 %73, label %74, label %80

74:                                               ; preds = %68
  invoke void @_ZNSt5stackIcSt5dequeIcSaIcEEE4pushERKc(ptr noundef nonnull align 8 dereferenceable(80) %7, ptr noundef nonnull align 1 dereferenceable(1) %18)
          to label %75 unwind label %76

75:                                               ; preds = %74
  br label %87

76:                                               ; preds = %83, %80, %74
  %77 = landingpad { ptr, i32 }
          cleanup
  %78 = extractvalue { ptr, i32 } %77, 0
  store ptr %78, ptr %8, align 8
  %79 = extractvalue { ptr, i32 } %77, 1
  store i32 %79, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 1, ptr %18) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %17) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %16) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %15) #4
  br label %131

80:                                               ; preds = %68
  %81 = invoke noundef zeroext i1 @_ZNKSt5stackIcSt5dequeIcSaIcEEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %7)
          to label %82 unwind label %76

82:                                               ; preds = %80
  br i1 %81, label %85, label %83

83:                                               ; preds = %82
  invoke void @_ZNSt5stackIcSt5dequeIcSaIcEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %7)
          to label %84 unwind label %76

84:                                               ; preds = %83
  br label %86

85:                                               ; preds = %82
  store i32 5, ptr %13, align 4
  br label %88

86:                                               ; preds = %84
  br label %87

87:                                               ; preds = %86, %75
  store i32 0, ptr %13, align 4
  br label %88

88:                                               ; preds = %87, %85
  call void @llvm.lifetime.end.p0(i64 1, ptr %18) #4
  %89 = load i32, ptr %13, align 4
  switch i32 %89, label %138 [
    i32 0, label %90
    i32 5, label %91
  ]

90:                                               ; preds = %88
  br label %91

91:                                               ; preds = %90, %88
  %92 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %16) #4
  br label %65

93:                                               ; preds = %67
  %94 = invoke noundef i64 @_ZNKSt5stackIcSt5dequeIcSaIcEEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
          to label %95 unwind label %104

95:                                               ; preds = %93
  %96 = invoke noundef i64 @_ZNKSt5stackIcSt5dequeIcSaIcEEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(80) %7)
          to label %97 unwind label %104

97:                                               ; preds = %95
  %98 = icmp eq i64 %94, %96
  br i1 %98, label %99, label %128

99:                                               ; preds = %97
  %100 = invoke noundef i64 @_ZNKSt5stackIcSt5dequeIcSaIcEEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
          to label %101 unwind label %104

101:                                              ; preds = %99
  %102 = icmp eq i64 %100, 0
  br i1 %102, label %103, label %108

103:                                              ; preds = %101
  store i1 true, ptr %3, align 1
  store i32 1, ptr %13, align 4
  br label %129

104:                                              ; preds = %124, %123, %115, %113, %109, %99, %95, %93
  %105 = landingpad { ptr, i32 }
          cleanup
  %106 = extractvalue { ptr, i32 } %105, 0
  store ptr %106, ptr %8, align 8
  %107 = extractvalue { ptr, i32 } %105, 1
  store i32 %107, ptr %9, align 4
  br label %131

108:                                              ; preds = %101
  br label %109

109:                                              ; preds = %125, %108
  %110 = invoke noundef i64 @_ZNKSt5stackIcSt5dequeIcSaIcEEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
          to label %111 unwind label %104

111:                                              ; preds = %109
  %112 = icmp ne i64 %110, 0
  br i1 %112, label %113, label %127

113:                                              ; preds = %111
  %114 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt5stackIcSt5dequeIcSaIcEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
          to label %115 unwind label %104

115:                                              ; preds = %113
  %116 = load i8, ptr %114, align 1, !tbaa !9
  %117 = sext i8 %116 to i32
  %118 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt5stackIcSt5dequeIcSaIcEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) %7)
          to label %119 unwind label %104

119:                                              ; preds = %115
  %120 = load i8, ptr %118, align 1, !tbaa !9
  %121 = sext i8 %120 to i32
  %122 = icmp eq i32 %117, %121
  br i1 %122, label %123, label %126

123:                                              ; preds = %119
  invoke void @_ZNSt5stackIcSt5dequeIcSaIcEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %6)
          to label %124 unwind label %104

124:                                              ; preds = %123
  invoke void @_ZNSt5stackIcSt5dequeIcSaIcEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %7)
          to label %125 unwind label %104

125:                                              ; preds = %124
  br label %109, !llvm.loop !10

126:                                              ; preds = %119
  store i1 false, ptr %3, align 1
  store i32 1, ptr %13, align 4
  br label %129

127:                                              ; preds = %111
  store i1 true, ptr %3, align 1
  store i32 1, ptr %13, align 4
  br label %129

128:                                              ; preds = %97
  store i1 false, ptr %3, align 1
  store i32 1, ptr %13, align 4
  br label %129

129:                                              ; preds = %128, %127, %126, %103
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %7) #4
  call void @llvm.lifetime.end.p0(i64 80, ptr %7) #4
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %6) #4
  call void @llvm.lifetime.end.p0(i64 80, ptr %6) #4
  %130 = load i1, ptr %3, align 1
  ret i1 %130

131:                                              ; preds = %104, %76, %41
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %7) #4
  br label %132

132:                                              ; preds = %131, %29
  call void @llvm.lifetime.end.p0(i64 80, ptr %7) #4
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %6) #4
  call void @llvm.lifetime.end.p0(i64 80, ptr %6) #4
  br label %133

133:                                              ; preds = %132
  %134 = load ptr, ptr %8, align 8
  %135 = load i32, ptr %9, align 4
  %136 = insertvalue { ptr, i32 } poison, ptr %134, 0
  %137 = insertvalue { ptr, i32 } %136, i32 %135, 1
  resume { ptr, i32 } %137

138:                                              ; preds = %88, %53
  unreachable
}

declare i32 @__gxx_personality_v0(...)

; 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 void @_ZNSt5stackIcSt5dequeIcSaIcEEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE3endEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEbRKNS_17__normal_iteratorIT_T0_EESD_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 1 dereferenceable(1) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIcSt5dequeIcSaIcEEE4pushERKc(ptr noundef nonnull align 8 dereferenceable(80), ptr noundef nonnull align 1 dereferenceable(1)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt5stackIcSt5dequeIcSaIcEEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIcSt5dequeIcSaIcEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt5stackIcSt5dequeIcSaIcEEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(80)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt5stackIcSt5dequeIcSaIcEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIcSt5dequeIcSaIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #3 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 = { 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 #4 = { 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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"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"

%"class.std::stack" = type { %"class.std::deque" }
%"class.std::deque" = type { %"class.std::_Deque_base" }
%"class.std::_Deque_base" = type { %"struct.std::_Deque_base<char, std::allocator<char>>::_Deque_impl" }
%"struct.std::_Deque_base<char, std::allocator<char>>::_Deque_impl" = type { %"struct.std::_Deque_base<char, std::allocator<char>>::_Deque_impl_data" }
%"struct.std::_Deque_base<char, std::allocator<char>>::_Deque_impl_data" = type { ptr, i64, %"struct.std::_Deque_iterator", %"struct.std::_Deque_iterator" }
%"struct.std::_Deque_iterator" = type { ptr, ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = 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 uwtable
define dso_local noundef zeroext i1 @_Z16backspaceCompareNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES4_(ptr noundef %0, ptr noundef %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::stack", align 8
  %4 = alloca %"class.std::stack", align 8
  %5 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %7 = alloca i8, align 1
  %8 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %9 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %10 = alloca i8, align 1
  call void @llvm.lifetime.start.p0(i64 80, ptr nonnull %3) #4
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  call void @llvm.lifetime.start.p0(i64 80, ptr nonnull %4) #4
  invoke void @_ZNSt5stackIcSt5dequeIcSaIcEEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(80) %4)
          to label %11 unwind label %18

11:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #4
  %12 = call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #4
  store ptr %12, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #4
  %13 = call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE3endEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #4
  store ptr %13, ptr %6, align 8
  %14 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEbRKNS_17__normal_iteratorIT_T0_EESD_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  br i1 %14, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %28, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %8) #4
  %15 = call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #4
  store ptr %15, ptr %8, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %9) #4
  %16 = call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE3endEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #4
  store ptr %16, ptr %9, align 8
  %17 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEbRKNS_17__normal_iteratorIT_T0_EESD_(ptr noundef nonnull align 8 dereferenceable(8) %8, ptr noundef nonnull align 8 dereferenceable(8) %9) #4
  br i1 %17, label %.lr.ph14, label %._crit_edge15

18:                                               ; preds = %2
  %19 = landingpad { ptr, i32 }
          cleanup
  br label %57

.lr.ph:                                           ; preds = %11, %28
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %7) #4
  %20 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %21 = load i8, ptr %20, align 1, !tbaa !5
  store i8 %21, ptr %7, align 1, !tbaa !5
  %.not10 = icmp eq i8 %21, 35
  br i1 %.not10, label %25, label %22

22:                                               ; preds = %.lr.ph
  invoke void @_ZNSt5stackIcSt5dequeIcSaIcEEE4pushERKc(ptr noundef nonnull align 8 dereferenceable(80) %3, ptr noundef nonnull align 1 dereferenceable(1) %7)
          to label %28 unwind label %23

23:                                               ; preds = %22
  %24 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #4
  br label %56

25:                                               ; preds = %.lr.ph
  %26 = call noundef zeroext i1 @_ZNKSt5stackIcSt5dequeIcSaIcEEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  br i1 %26, label %28, label %27

27:                                               ; preds = %25
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  br label %28

28:                                               ; preds = %27, %22, %25
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %7) #4
  %29 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %30 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEbRKNS_17__normal_iteratorIT_T0_EESD_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  br i1 %30, label %.lr.ph, label %._crit_edge

._crit_edge15:                                    ; preds = %42, %._crit_edge
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %9) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %8) #4
  %31 = call noundef i64 @_ZNKSt5stackIcSt5dequeIcSaIcEEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  %32 = call noundef i64 @_ZNKSt5stackIcSt5dequeIcSaIcEEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(80) %4)
  %33 = icmp eq i64 %31, %32
  br i1 %33, label %45, label %.loopexit

.lr.ph14:                                         ; preds = %._crit_edge, %42
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %10) #4
  %34 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %8) #4
  %35 = load i8, ptr %34, align 1, !tbaa !5
  store i8 %35, ptr %10, align 1, !tbaa !5
  %.not9 = icmp eq i8 %35, 35
  br i1 %.not9, label %39, label %36

36:                                               ; preds = %.lr.ph14
  invoke void @_ZNSt5stackIcSt5dequeIcSaIcEEE4pushERKc(ptr noundef nonnull align 8 dereferenceable(80) %4, ptr noundef nonnull align 1 dereferenceable(1) %10)
          to label %42 unwind label %37

37:                                               ; preds = %36
  %38 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %10) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %9) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %8) #4
  br label %56

39:                                               ; preds = %.lr.ph14
  %40 = call noundef zeroext i1 @_ZNKSt5stackIcSt5dequeIcSaIcEEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80) %4)
  br i1 %40, label %42, label %41

41:                                               ; preds = %39
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %4)
  br label %42

42:                                               ; preds = %41, %36, %39
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %10) #4
  %43 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %8) #4
  %44 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEbRKNS_17__normal_iteratorIT_T0_EESD_(ptr noundef nonnull align 8 dereferenceable(8) %8, ptr noundef nonnull align 8 dereferenceable(8) %9) #4
  br i1 %44, label %.lr.ph14, label %._crit_edge15

45:                                               ; preds = %._crit_edge15
  %46 = call noundef i64 @_ZNKSt5stackIcSt5dequeIcSaIcEEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  %47 = icmp eq i64 %46, 0
  br i1 %47, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %45
  %48 = call noundef i64 @_ZNKSt5stackIcSt5dequeIcSaIcEEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  %.not16 = icmp eq i64 %48, 0
  br i1 %.not16, label %.loopexit, label %.lr.ph17

.lr.ph17:                                         ; preds = %.preheader, %54
  %49 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt5stackIcSt5dequeIcSaIcEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  %50 = load i8, ptr %49, align 1, !tbaa !5
  %51 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt5stackIcSt5dequeIcSaIcEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80) %4)
  %52 = load i8, ptr %51, align 1, !tbaa !5
  %53 = icmp eq i8 %50, %52
  br i1 %53, label %54, label %.loopexit

54:                                               ; preds = %.lr.ph17
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80) %4)
  %55 = call noundef i64 @_ZNKSt5stackIcSt5dequeIcSaIcEEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(80) %3)
  %.not = icmp eq i64 %55, 0
  br i1 %.not, label %.loopexit, label %.lr.ph17, !llvm.loop !8

.loopexit:                                        ; preds = %.lr.ph17, %54, %.preheader, %._crit_edge15, %45
  %.0 = phi i1 [ true, %45 ], [ false, %._crit_edge15 ], [ true, %.preheader ], [ %53, %54 ], [ %53, %.lr.ph17 ]
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %4) #4
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %4) #4
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %3) #4
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %3) #4
  ret i1 %.0

56:                                               ; preds = %37, %23
  %.pn = phi { ptr, i32 } [ %24, %23 ], [ %38, %37 ]
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %4) #4
  br label %57

57:                                               ; preds = %56, %18
  %.pn.pn = phi { ptr, i32 } [ %.pn, %56 ], [ %19, %18 ]
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %4) #4
  call void @_ZNSt5stackIcSt5dequeIcSaIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80) %3) #4
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %3) #4
  resume { ptr, i32 } %.pn.pn
}

declare i32 @__gxx_personality_v0(...)

; 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 void @_ZNSt5stackIcSt5dequeIcSaIcEEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE3endEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEbRKNS_17__normal_iteratorIT_T0_EESD_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 1 dereferenceable(1) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt5stackIcSt5dequeIcSaIcEEE4pushERKc(ptr noundef nonnull align 8 dereferenceable(80), ptr noundef nonnull align 1 dereferenceable(1)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt5stackIcSt5dequeIcSaIcEEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIcSt5dequeIcSaIcEEE3popEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt5stackIcSt5dequeIcSaIcEEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt5stackIcSt5dequeIcSaIcEEE3topEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt5stackIcSt5dequeIcSaIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(80)) unnamed_addr #3 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 = { 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 #4 = { 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 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass