; LLVM IR from ahampriyanshu/algo-ds-101 :: Algorithms/String/Palindrome (isPalindrome)

; 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::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" }
%"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] }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [31 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [27 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca %"class.std::__cxx11::basic_string", align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 32, ptr %2) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %2) #6
  %7 = invoke 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) %2)
          to label %8 unwind label %41

8:                                                ; preds = %0
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #6
  store i32 0, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #6
  %9 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %2) #6
  %10 = sub i64 %9, 1
  %11 = trunc i64 %10 to i32
  store i32 %11, ptr %6, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %143, %8
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %16, label %144

16:                                               ; preds = %12
  br label %17

17:                                               ; preds = %38, %16
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %19)
          to label %21 unwind label %45

21:                                               ; preds = %17
  %22 = load i8, ptr %20, align 1, !tbaa !9
  %23 = sext i8 %22 to i32
  %24 = call i32 @isalpha(i32 noundef %23) #7
  %25 = icmp ne i32 %24, 0
  br i1 %25, label %36, label %26

26:                                               ; preds = %21
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %28)
          to label %30 unwind label %45

30:                                               ; preds = %26
  %31 = load i8, ptr %29, align 1, !tbaa !9
  %32 = sext i8 %31 to i32
  %33 = call i32 @isdigit(i32 noundef %32) #7
  %34 = icmp ne i32 %33, 0
  %35 = xor i1 %34, true
  br label %36

36:                                               ; preds = %30, %21
  %37 = phi i1 [ false, %21 ], [ %35, %30 ]
  br i1 %37, label %38, label %49

38:                                               ; preds = %36
  %39 = load i32, ptr %5, align 4, !tbaa !5
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %5, align 4, !tbaa !5
  br label %17, !llvm.loop !10

41:                                               ; preds = %0
  %42 = landingpad { ptr, i32 }
          cleanup
  %43 = extractvalue { ptr, i32 } %42, 0
  store ptr %43, ptr %3, align 8
  %44 = extractvalue { ptr, i32 } %42, 1
  store i32 %44, ptr %4, align 4
  br label %156

45:                                               ; preds = %151, %148, %127, %123, %114, %110, %101, %92, %88, %79, %59, %50, %26, %17
  %46 = landingpad { ptr, i32 }
          cleanup
  %47 = extractvalue { ptr, i32 } %46, 0
  store ptr %47, ptr %3, align 8
  %48 = extractvalue { ptr, i32 } %46, 1
  store i32 %48, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #6
  br label %156

49:                                               ; preds = %36
  br label %50

50:                                               ; preds = %71, %49
  %51 = load i32, ptr %6, align 4, !tbaa !5
  %52 = sext i32 %51 to i64
  %53 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %52)
          to label %54 unwind label %45

54:                                               ; preds = %50
  %55 = load i8, ptr %53, align 1, !tbaa !9
  %56 = sext i8 %55 to i32
  %57 = call i32 @isalpha(i32 noundef %56) #7
  %58 = icmp ne i32 %57, 0
  br i1 %58, label %69, label %59

59:                                               ; preds = %54
  %60 = load i32, ptr %6, align 4, !tbaa !5
  %61 = sext i32 %60 to i64
  %62 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %61)
          to label %63 unwind label %45

63:                                               ; preds = %59
  %64 = load i8, ptr %62, align 1, !tbaa !9
  %65 = sext i8 %64 to i32
  %66 = call i32 @isdigit(i32 noundef %65) #7
  %67 = icmp ne i32 %66, 0
  %68 = xor i1 %67, true
  br label %69

69:                                               ; preds = %63, %54
  %70 = phi i1 [ false, %54 ], [ %68, %63 ]
  br i1 %70, label %71, label %74

71:                                               ; preds = %69
  %72 = load i32, ptr %6, align 4, !tbaa !5
  %73 = add nsw i32 %72, -1
  store i32 %73, ptr %6, align 4, !tbaa !5
  br label %50, !llvm.loop !12

74:                                               ; preds = %69
  %75 = load i32, ptr %5, align 4, !tbaa !5
  %76 = load i32, ptr %6, align 4, !tbaa !5
  %77 = icmp sge i32 %75, %76
  br i1 %77, label %78, label %79

78:                                               ; preds = %74
  br label %144

79:                                               ; preds = %74
  %80 = load i32, ptr %5, align 4, !tbaa !5
  %81 = sext i32 %80 to i64
  %82 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %81)
          to label %83 unwind label %45

83:                                               ; preds = %79
  %84 = load i8, ptr %82, align 1, !tbaa !9
  %85 = sext i8 %84 to i32
  %86 = call i32 @isupper(i32 noundef %85) #7
  %87 = icmp ne i32 %86, 0
  br i1 %87, label %88, label %101

88:                                               ; preds = %83
  %89 = load i32, ptr %5, align 4, !tbaa !5
  %90 = sext i32 %89 to i64
  %91 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %90)
          to label %92 unwind label %45

92:                                               ; preds = %88
  %93 = load i8, ptr %91, align 1, !tbaa !9
  %94 = sext i8 %93 to i32
  %95 = call i32 @tolower(i32 noundef %94) #7
  %96 = trunc i32 %95 to i8
  %97 = load i32, ptr %5, align 4, !tbaa !5
  %98 = sext i32 %97 to i64
  %99 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %98)
          to label %100 unwind label %45

100:                                              ; preds = %92
  store i8 %96, ptr %99, align 1, !tbaa !9
  br label %101

101:                                              ; preds = %100, %83
  %102 = load i32, ptr %6, align 4, !tbaa !5
  %103 = sext i32 %102 to i64
  %104 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %103)
          to label %105 unwind label %45

105:                                              ; preds = %101
  %106 = load i8, ptr %104, align 1, !tbaa !9
  %107 = sext i8 %106 to i32
  %108 = call i32 @isupper(i32 noundef %107) #7
  %109 = icmp ne i32 %108, 0
  br i1 %109, label %110, label %123

110:                                              ; preds = %105
  %111 = load i32, ptr %6, align 4, !tbaa !5
  %112 = sext i32 %111 to i64
  %113 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %112)
          to label %114 unwind label %45

114:                                              ; preds = %110
  %115 = load i8, ptr %113, align 1, !tbaa !9
  %116 = sext i8 %115 to i32
  %117 = call i32 @tolower(i32 noundef %116) #7
  %118 = trunc i32 %117 to i8
  %119 = load i32, ptr %6, align 4, !tbaa !5
  %120 = sext i32 %119 to i64
  %121 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %120)
          to label %122 unwind label %45

122:                                              ; preds = %114
  store i8 %118, ptr %121, align 1, !tbaa !9
  br label %123

123:                                              ; preds = %122, %105
  %124 = load i32, ptr %5, align 4, !tbaa !5
  %125 = sext i32 %124 to i64
  %126 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %125)
          to label %127 unwind label %45

127:                                              ; preds = %123
  %128 = load i8, ptr %126, align 1, !tbaa !9
  %129 = sext i8 %128 to i32
  %130 = load i32, ptr %6, align 4, !tbaa !5
  %131 = sext i32 %130 to i64
  %132 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %2, i64 noundef %131)
          to label %133 unwind label %45

133:                                              ; preds = %127
  %134 = load i8, ptr %132, align 1, !tbaa !9
  %135 = sext i8 %134 to i32
  %136 = icmp eq i32 %129, %135
  br i1 %136, label %137, label %142

137:                                              ; preds = %133
  %138 = load i32, ptr %5, align 4, !tbaa !5
  %139 = add nsw i32 %138, 1
  store i32 %139, ptr %5, align 4, !tbaa !5
  %140 = load i32, ptr %6, align 4, !tbaa !5
  %141 = add nsw i32 %140, -1
  store i32 %141, ptr %6, align 4, !tbaa !5
  br label %143

142:                                              ; preds = %133
  br label %144

143:                                              ; preds = %137
  br label %12, !llvm.loop !13

144:                                              ; preds = %142, %78, %12
  %145 = load i32, ptr %5, align 4, !tbaa !5
  %146 = load i32, ptr %6, align 4, !tbaa !5
  %147 = icmp slt i32 %145, %146
  br i1 %147, label %148, label %151

148:                                              ; preds = %144
  %149 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
          to label %150 unwind label %45

150:                                              ; preds = %148
  br label %154

151:                                              ; preds = %144
  %152 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.1)
          to label %153 unwind label %45

153:                                              ; preds = %151
  br label %154

154:                                              ; preds = %153, %150
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #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
  %155 = load i32, ptr %1, align 4
  ret i32 %155

156:                                              ; preds = %45, %41
  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
  br label %157

157:                                              ; preds = %156
  %158 = load ptr, ptr %3, align 8
  %159 = load i32, ptr %4, align 4
  %160 = insertvalue { ptr, i32 } poison, ptr %158, 0
  %161 = insertvalue { ptr, i32 } %160, i32 %159, 1
  resume { ptr, i32 } %161
}

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

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

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

declare i32 @__gxx_personality_v0(...)

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

; Function Attrs: nounwind willreturn memory(read)
declare i32 @isalpha(i32 noundef) #4

; 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) #2 align 2

; Function Attrs: nounwind willreturn memory(read)
declare i32 @isdigit(i32 noundef) #4

; Function Attrs: nounwind willreturn memory(read)
declare i32 @isupper(i32 noundef) #4

; Function Attrs: nounwind willreturn memory(read)
declare i32 @tolower(i32 noundef) #4

; 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

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

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

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { "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 willreturn memory(read) "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 }
attributes #7 = { nounwind willreturn memory(read) }

!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}


; 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::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" }
%"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] }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [31 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [27 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %1 = alloca %"class.std::__cxx11::basic_string", align 8
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %1) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %1) #6
  %2 = invoke 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) %1)
          to label %3 unwind label %21

3:                                                ; preds = %0
  %4 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #6
  %5 = trunc i64 %4 to i32
  %.052 = add i32 %5, -1
  %6 = icmp sgt i32 %.052, 0
  br i1 %6, label %.preheader, label %._crit_edge

.preheader:                                       ; preds = %3, %69
  %.054 = phi i32 [ %.0, %69 ], [ %.052, %3 ]
  %.02653 = phi i32 [ %70, %69 ], [ 0, %3 ]
  %7 = sext i32 %.02653 to i64
  %8 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %7)
  %9 = load i8, ptr %8, align 1, !tbaa !5
  %10 = sext i8 %9 to i32
  %11 = call i32 @isalpha(i32 noundef %10) #7
  %.not38 = icmp eq i32 %11, 0
  br i1 %.not38, label %.lr.ph, label %.critedge

.lr.ph:                                           ; preds = %.preheader, %16
  %indvars.iv = phi i64 [ %indvars.iv.next, %16 ], [ %7, %.preheader ]
  %12 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %indvars.iv)
  %13 = load i8, ptr %12, align 1, !tbaa !5
  %14 = sext i8 %13 to i32
  %15 = add nsw i32 %14, -58
  %isdigit = icmp ult i32 %15, -10
  br i1 %isdigit, label %16, label %.critedge.loopexit

16:                                               ; preds = %.lr.ph
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %17 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %indvars.iv.next)
  %18 = load i8, ptr %17, align 1, !tbaa !5
  %19 = sext i8 %18 to i32
  %20 = call i32 @isalpha(i32 noundef %19) #7
  %.not = icmp eq i32 %20, 0
  br i1 %.not, label %.lr.ph, label %.critedge.loopexit, !llvm.loop !8

21:                                               ; preds = %0
  %22 = landingpad { ptr, i32 }
          cleanup
  br label %75

23:                                               ; preds = %._crit_edge
  %24 = landingpad { ptr, i32 }
          cleanup
  br label %75

.critedge.loopexit:                               ; preds = %16, %.lr.ph
  %.lcssa.ph = phi i64 [ %indvars.iv, %.lr.ph ], [ %indvars.iv.next, %16 ]
  %.127.lcssa.ph = trunc i64 %.lcssa.ph to i32
  br label %.critedge

.critedge:                                        ; preds = %.critedge.loopexit, %.preheader
  %.127.lcssa = phi i32 [ %.02653, %.preheader ], [ %.127.lcssa.ph, %.critedge.loopexit ]
  %.lcssa = phi i64 [ %7, %.preheader ], [ %.lcssa.ph, %.critedge.loopexit ]
  %25 = sext i32 %.054 to i64
  %26 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %25)
  %27 = load i8, ptr %26, align 1, !tbaa !5
  %28 = sext i8 %27 to i32
  %29 = call i32 @isalpha(i32 noundef %28) #7
  %.not3144 = icmp eq i32 %29, 0
  br i1 %.not3144, label %.lr.ph46, label %.critedge2

.lr.ph46:                                         ; preds = %.critedge, %34
  %indvars.iv63 = phi i64 [ %indvars.iv.next64, %34 ], [ %25, %.critedge ]
  %30 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %indvars.iv63)
  %31 = load i8, ptr %30, align 1, !tbaa !5
  %32 = sext i8 %31 to i32
  %33 = add nsw i32 %32, -58
  %isdigit32 = icmp ult i32 %33, -10
  br i1 %isdigit32, label %34, label %.critedge2.loopexit

34:                                               ; preds = %.lr.ph46
  %indvars.iv.next64 = add nsw i64 %indvars.iv63, -1
  %35 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %indvars.iv.next64)
  %36 = load i8, ptr %35, align 1, !tbaa !5
  %37 = sext i8 %36 to i32
  %38 = call i32 @isalpha(i32 noundef %37) #7
  %.not31 = icmp eq i32 %38, 0
  br i1 %.not31, label %.lr.ph46, label %.critedge2.loopexit, !llvm.loop !10

.critedge2.loopexit:                              ; preds = %34, %.lr.ph46
  %.lcssa37.ph = phi i64 [ %indvars.iv63, %.lr.ph46 ], [ %indvars.iv.next64, %34 ]
  %.1.lcssa.ph = trunc i64 %.lcssa37.ph to i32
  br label %.critedge2

.critedge2:                                       ; preds = %.critedge2.loopexit, %.critedge
  %.1.lcssa = phi i32 [ %.054, %.critedge ], [ %.1.lcssa.ph, %.critedge2.loopexit ]
  %.lcssa37 = phi i64 [ %25, %.critedge ], [ %.lcssa37.ph, %.critedge2.loopexit ]
  %.not33 = icmp slt i32 %.127.lcssa, %.1.lcssa
  br i1 %.not33, label %39, label %._crit_edge

39:                                               ; preds = %.critedge2
  %40 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %.lcssa)
  %41 = load i8, ptr %40, align 1, !tbaa !5
  %42 = sext i8 %41 to i32
  %43 = call i32 @isupper(i32 noundef %42) #7
  %.not34 = icmp eq i32 %43, 0
  br i1 %.not34, label %51, label %44

44:                                               ; preds = %39
  %45 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %.lcssa)
  %46 = load i8, ptr %45, align 1, !tbaa !5
  %47 = sext i8 %46 to i32
  %48 = call i32 @tolower(i32 noundef %47) #7
  %49 = trunc i32 %48 to i8
  %50 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %.lcssa)
  store i8 %49, ptr %50, align 1, !tbaa !5
  br label %51

51:                                               ; preds = %44, %39
  %52 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %.lcssa37)
  %53 = load i8, ptr %52, align 1, !tbaa !5
  %54 = sext i8 %53 to i32
  %55 = call i32 @isupper(i32 noundef %54) #7
  %.not35 = icmp eq i32 %55, 0
  br i1 %.not35, label %63, label %56

56:                                               ; preds = %51
  %57 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %.lcssa37)
  %58 = load i8, ptr %57, align 1, !tbaa !5
  %59 = sext i8 %58 to i32
  %60 = call i32 @tolower(i32 noundef %59) #7
  %61 = trunc i32 %60 to i8
  %62 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %.lcssa37)
  store i8 %61, ptr %62, align 1, !tbaa !5
  br label %63

63:                                               ; preds = %56, %51
  %64 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %.lcssa)
  %65 = load i8, ptr %64, align 1, !tbaa !5
  %66 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %.lcssa37)
  %67 = load i8, ptr %66, align 1, !tbaa !5
  %68 = icmp eq i8 %65, %67
  br i1 %68, label %69, label %._crit_edge

69:                                               ; preds = %63
  %70 = add nsw i32 %.127.lcssa, 1
  %.0 = add nsw i32 %.1.lcssa, -1
  %71 = icmp slt i32 %70, %.0
  br i1 %71, label %.preheader, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %69, %.critedge2, %63, %3
  %.228 = phi i32 [ 0, %3 ], [ %.127.lcssa, %63 ], [ %.127.lcssa, %.critedge2 ], [ %70, %69 ]
  %.2 = phi i32 [ %.052, %3 ], [ %.1.lcssa, %63 ], [ %.1.lcssa, %.critedge2 ], [ %.0, %69 ]
  %72 = icmp slt i32 %.228, %.2
  %.str..str.1 = select i1 %72, ptr @.str, ptr @.str.1
  %73 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull %.str..str.1)
          to label %74 unwind label %23

74:                                               ; preds = %._crit_edge
  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
  ret i32 0

75:                                               ; preds = %23, %21
  %.pn = phi { ptr, i32 } [ %24, %23 ], [ %22, %21 ]
  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
  resume { ptr, i32 } %.pn
}

; 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 nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

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

declare i32 @__gxx_personality_v0(...)

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

; Function Attrs: mustprogress nofree nounwind willreturn memory(read)
declare i32 @isalpha(i32 noundef) local_unnamed_addr #4

; 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 #2 align 2

; Function Attrs: mustprogress nofree nounwind willreturn memory(read)
declare i32 @isupper(i32 noundef) local_unnamed_addr #4

; Function Attrs: mustprogress nofree nounwind willreturn memory(read)
declare i32 @tolower(i32 noundef) local_unnamed_addr #4

; 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

; 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 nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { "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 nofree nounwind willreturn memory(read) "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 }
attributes #7 = { nounwind willreturn memory(read) }

!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"}
!10 = distinct !{!10, !9}
!11 = distinct !{!11, !9}


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