; LLVM IR from Izaron/ACM-ICPC :: Timus Online Judge/Volume 3/1297. Palindrome.ll (Z3dfsii)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

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

@_Z1sB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@_Z3ansB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@.str = external hidden unnamed_addr constant [1 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: 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 @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

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

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) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z3dfsii(i32 noundef %0, i32 noundef %1) #2 personality ptr @__gxx_personality_v0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca %"class.std::__cxx11::basic_string", align 8
  %6 = alloca %"class.std::allocator", align 1
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca %"class.std::__cxx11::basic_string", align 8
  %10 = alloca %"class.std::__cxx11::basic_string", align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #3
  call void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %6) #3
  invoke void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2IS3_EEPKcRKS3_(ptr noundef nonnull align 8 dereferenceable(32) %5, ptr noundef @.str, ptr noundef nonnull align 1 dereferenceable(1) %6)
          to label %11 unwind label %64

11:                                               ; preds = %2
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %6) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #3
  br label %12

12:                                               ; preds = %116, %11
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = icmp sge i32 %13, 0
  br i1 %14, label %15, label %34

15:                                               ; preds = %12
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11) #3
  %19 = icmp ult i64 %17, %18
  br i1 %19, label %20, label %34

20:                                               ; preds = %15
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %22)
          to label %24 unwind label %68

24:                                               ; preds = %20
  %25 = load i8, ptr %23, align 1, !tbaa !9
  %26 = sext i8 %25 to i32
  %27 = load i32, ptr %4, 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) @_Z1sB5cxx11, i64 noundef %28)
          to label %30 unwind label %68

30:                                               ; preds = %24
  %31 = load i8, ptr %29, align 1, !tbaa !9
  %32 = sext i8 %31 to i32
  %33 = icmp eq i32 %26, %32
  br label %34

34:                                               ; preds = %30, %15, %12
  %35 = phi i1 [ false, %15 ], [ false, %12 ], [ %33, %30 ]
  br i1 %35, label %36, label %121

36:                                               ; preds = %34
  %37 = load i32, ptr %4, align 4, !tbaa !5
  %38 = load i32, ptr %3, align 4, !tbaa !5
  %39 = sub nsw i32 %37, %38
  %40 = icmp eq i32 %39, 2
  br i1 %40, label %41, label %76

41:                                               ; preds = %36
  %42 = load i32, ptr %3, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  %44 = sext i32 %43 to i64
  %45 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %44)
          to label %46 unwind label %68

46:                                               ; preds = %41
  %47 = load i8, ptr %45, align 1, !tbaa !9
  %48 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %5, i8 noundef signext %47)
          to label %49 unwind label %68

49:                                               ; preds = %46
  call void @llvm.lifetime.start.p0(i64 32, ptr %9) #3
  %50 = load i32, ptr %3, align 4, !tbaa !5
  %51 = sext i32 %50 to i64
  %52 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %51)
          to label %53 unwind label %72

53:                                               ; preds = %49
  %54 = load i8, ptr %52, align 1, !tbaa !9
  invoke void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EES5_RKS8_(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %9, i8 noundef signext %54, ptr noundef nonnull align 8 dereferenceable(32) %5)
          to label %55 unwind label %72

55:                                               ; preds = %53
  %56 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32) %5, ptr noundef nonnull align 8 dereferenceable(32) %9) #3
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %9) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr %9) #3
  %57 = load i32, ptr %4, align 4, !tbaa !5
  %58 = sext i32 %57 to i64
  %59 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %58)
          to label %60 unwind label %68

60:                                               ; preds = %55
  %61 = load i8, ptr %59, align 1, !tbaa !9
  %62 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %5, i8 noundef signext %61)
          to label %63 unwind label %68

63:                                               ; preds = %60
  br label %116

64:                                               ; preds = %2
  %65 = landingpad { ptr, i32 }
          cleanup
  %66 = extractvalue { ptr, i32 } %65, 0
  store ptr %66, ptr %7, align 8
  %67 = extractvalue { ptr, i32 } %65, 1
  store i32 %67, ptr %8, align 4
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %6) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #3
  br label %131

68:                                               ; preds = %125, %107, %102, %92, %88, %85, %81, %60, %55, %46, %41, %24, %20
  %69 = landingpad { ptr, i32 }
          cleanup
  %70 = extractvalue { ptr, i32 } %69, 0
  store ptr %70, ptr %7, align 8
  %71 = extractvalue { ptr, i32 } %69, 1
  store i32 %71, ptr %8, align 4
  br label %130

72:                                               ; preds = %53, %49
  %73 = landingpad { ptr, i32 }
          cleanup
  %74 = extractvalue { ptr, i32 } %73, 0
  store ptr %74, ptr %7, align 8
  %75 = extractvalue { ptr, i32 } %73, 1
  store i32 %75, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 32, ptr %9) #3
  br label %130

76:                                               ; preds = %36
  %77 = load i32, ptr %4, align 4, !tbaa !5
  %78 = load i32, ptr %3, align 4, !tbaa !5
  %79 = sub nsw i32 %77, %78
  %80 = icmp eq i32 %79, 1
  br i1 %80, label %81, label %96

81:                                               ; preds = %76
  %82 = load i32, ptr %3, align 4, !tbaa !5
  %83 = sext i32 %82 to i64
  %84 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %83)
          to label %85 unwind label %68

85:                                               ; preds = %81
  %86 = load i8, ptr %84, align 1, !tbaa !9
  %87 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %5, i8 noundef signext %86)
          to label %88 unwind label %68

88:                                               ; preds = %85
  %89 = load i32, ptr %4, 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) @_Z1sB5cxx11, i64 noundef %90)
          to label %92 unwind label %68

92:                                               ; preds = %88
  %93 = load i8, ptr %91, align 1, !tbaa !9
  %94 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %5, i8 noundef signext %93)
          to label %95 unwind label %68

95:                                               ; preds = %92
  br label %115

96:                                               ; preds = %76
  call void @llvm.lifetime.start.p0(i64 32, ptr %10) #3
  %97 = load i32, ptr %3, 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) @_Z1sB5cxx11, i64 noundef %98)
          to label %100 unwind label %111

100:                                              ; preds = %96
  %101 = load i8, ptr %99, align 1, !tbaa !9
  invoke void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EES5_RKS8_(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %10, i8 noundef signext %101, ptr noundef nonnull align 8 dereferenceable(32) %5)
          to label %102 unwind label %111

102:                                              ; preds = %100
  %103 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32) %5, ptr noundef nonnull align 8 dereferenceable(32) %10) #3
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %10) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr %10) #3
  %104 = load i32, ptr %4, align 4, !tbaa !5
  %105 = sext i32 %104 to i64
  %106 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %105)
          to label %107 unwind label %68

107:                                              ; preds = %102
  %108 = load i8, ptr %106, align 1, !tbaa !9
  %109 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %5, i8 noundef signext %108)
          to label %110 unwind label %68

110:                                              ; preds = %107
  br label %115

111:                                              ; preds = %100, %96
  %112 = landingpad { ptr, i32 }
          cleanup
  %113 = extractvalue { ptr, i32 } %112, 0
  store ptr %113, ptr %7, align 8
  %114 = extractvalue { ptr, i32 } %112, 1
  store i32 %114, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 32, ptr %10) #3
  br label %130

115:                                              ; preds = %110, %95
  br label %116

116:                                              ; preds = %115, %63
  %117 = load i32, ptr %3, align 4, !tbaa !5
  %118 = add nsw i32 %117, -1
  store i32 %118, ptr %3, align 4, !tbaa !5
  %119 = load i32, ptr %4, align 4, !tbaa !5
  %120 = add nsw i32 %119, 1
  store i32 %120, ptr %4, align 4, !tbaa !5
  br label %12, !llvm.loop !10

121:                                              ; preds = %34
  %122 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %5) #3
  %123 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) @_Z3ansB5cxx11) #3
  %124 = icmp ugt i64 %122, %123
  br i1 %124, label %125, label %128

125:                                              ; preds = %121
  %126 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32) @_Z3ansB5cxx11, ptr noundef nonnull align 8 dereferenceable(32) %5)
          to label %127 unwind label %68

127:                                              ; preds = %125
  br label %128

128:                                              ; preds = %127, %121
  %129 = load i32, ptr %4, align 4, !tbaa !5
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr %5) #3
  ret i32 %129

130:                                              ; preds = %111, %72, %68
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #3
  br label %131

131:                                              ; preds = %130, %64
  call void @llvm.lifetime.end.p0(i64 32, ptr %5) #3
  br label %132

132:                                              ; preds = %131
  %133 = load ptr, ptr %7, align 8
  %134 = load i32, ptr %8, align 4
  %135 = insertvalue { ptr, i32 } poison, ptr %133, 0
  %136 = insertvalue { ptr, i32 } %135, i32 %134, 1
  resume { ptr, i32 } %136
}

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(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 noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32), i8 noundef signext) #2 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)) #2

; 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 uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

attributes #0 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"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"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

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

@_Z1sB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@_Z3ansB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@.str = external hidden unnamed_addr constant [1 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 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 @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

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

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) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z3dfsii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #2 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::__cxx11::basic_string", align 8
  %4 = alloca %"class.std::allocator", align 1
  %5 = alloca %"class.std::__cxx11::basic_string", align 8
  %6 = alloca %"class.std::__cxx11::basic_string", align 8
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #3
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %4) #3
  call void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #3
  invoke void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2IS3_EEPKcRKS3_(ptr noundef nonnull align 8 dereferenceable(32) %3, ptr noundef nonnull @.str, ptr noundef nonnull align 1 dereferenceable(1) %4)
          to label %7 unwind label %37

7:                                                ; preds = %2
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %4) #3
  %8 = icmp sgt i32 %0, -1
  br i1 %8, label %.lr.ph.preheader, label %.critedge

.lr.ph.preheader:                                 ; preds = %7
  %9 = sext i32 %1 to i64
  %10 = zext nneg i32 %0 to i64
  %11 = add i32 %1, %0
  %12 = add i32 %11, 1
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %52
  %indvars.iv36 = phi i64 [ %10, %.lr.ph.preheader ], [ %indvars.iv.next37, %52 ]
  %indvars.iv = phi i64 [ %9, %.lr.ph.preheader ], [ %indvars.iv.next, %52 ]
  %13 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11) #3
  %14 = icmp ugt i64 %13, %indvars.iv
  br i1 %14, label %15, label %.critedge.loopexit.split.loop.exit

15:                                               ; preds = %.lr.ph
  %16 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %indvars.iv36)
  %17 = load i8, ptr %16, align 1, !tbaa !5
  %18 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %indvars.iv)
  %19 = load i8, ptr %18, align 1, !tbaa !5
  %20 = icmp eq i8 %17, %19
  br i1 %20, label %21, label %.critedge.loopexit.split.loop.exit43

21:                                               ; preds = %15
  %22 = sub nsw i64 %indvars.iv, %indvars.iv36
  %23 = trunc nsw i64 %22 to i32
  switch i32 %23, label %45 [
    i32 2, label %24
    i32 1, label %41
  ]

24:                                               ; preds = %21
  %25 = add nuw nsw i64 %indvars.iv36, 1
  %26 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %25)
  %27 = load i8, ptr %26, align 1, !tbaa !5
  %28 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %3, i8 noundef signext %27)
          to label %29 unwind label %.loopexit

29:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %5) #3
  %30 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %indvars.iv36)
  %31 = load i8, ptr %30, align 1, !tbaa !5
  invoke void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EES5_RKS8_(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %5, i8 noundef signext %31, ptr noundef nonnull align 8 dereferenceable(32) %3)
          to label %32 unwind label %39

32:                                               ; preds = %29
  %33 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32) %3, ptr noundef nonnull align 8 dereferenceable(32) %5) #3
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #3
  br label %.invoke

.invoke:                                          ; preds = %41, %48, %32
  %34 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %indvars.iv)
  %35 = load i8, ptr %34, align 1, !tbaa !5
  %36 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %3, i8 noundef signext %35)
          to label %52 unwind label %.loopexit

37:                                               ; preds = %2
  %38 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %4) #3
  br label %63

.loopexit:                                        ; preds = %.invoke, %24, %41
  %lpad.loopexit = landingpad { ptr, i32 }
          cleanup
  br label %62

.loopexit.split-lp:                               ; preds = %59
  %lpad.loopexit.split-lp = landingpad { ptr, i32 }
          cleanup
  br label %62

39:                                               ; preds = %29
  %40 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #3
  br label %62

41:                                               ; preds = %21
  %42 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %indvars.iv36)
  %43 = load i8, ptr %42, align 1, !tbaa !5
  %44 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %3, i8 noundef signext %43)
          to label %.invoke unwind label %.loopexit

45:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %6) #3
  %46 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %indvars.iv36)
  %47 = load i8, ptr %46, align 1, !tbaa !5
  invoke void @_ZStplIcSt11char_traitsIcESaIcEENSt7__cxx1112basic_stringIT_T0_T1_EES5_RKS8_(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %6, i8 noundef signext %47, ptr noundef nonnull align 8 dereferenceable(32) %3)
          to label %48 unwind label %50

48:                                               ; preds = %45
  %49 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEOS4_(ptr noundef nonnull align 8 dereferenceable(32) %3, ptr noundef nonnull align 8 dereferenceable(32) %6) #3
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %6) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %6) #3
  br label %.invoke

50:                                               ; preds = %45
  %51 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %6) #3
  br label %62

52:                                               ; preds = %.invoke
  %indvars.iv.next37 = add nsw i64 %indvars.iv36, -1
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %53 = icmp sgt i64 %indvars.iv36, 0
  br i1 %53, label %.lr.ph, label %.critedge, !llvm.loop !8

.critedge.loopexit.split.loop.exit:               ; preds = %.lr.ph
  %54 = trunc nsw i64 %indvars.iv to i32
  br label %.critedge

.critedge.loopexit.split.loop.exit43:             ; preds = %15
  %55 = trunc nsw i64 %indvars.iv to i32
  br label %.critedge

.critedge:                                        ; preds = %52, %.critedge.loopexit.split.loop.exit, %.critedge.loopexit.split.loop.exit43, %7
  %.021.lcssa = phi i32 [ %1, %7 ], [ %54, %.critedge.loopexit.split.loop.exit ], [ %55, %.critedge.loopexit.split.loop.exit43 ], [ %12, %52 ]
  %56 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %3) #3
  %57 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) @_Z3ansB5cxx11) #3
  %58 = icmp ugt i64 %56, %57
  br i1 %58, label %59, label %61

59:                                               ; preds = %.critedge
  %60 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32) @_Z3ansB5cxx11, ptr noundef nonnull align 8 dereferenceable(32) %3)
          to label %61 unwind label %.loopexit.split-lp

61:                                               ; preds = %59, %.critedge
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #3
  ret i32 %.021.lcssa

62:                                               ; preds = %.loopexit, %.loopexit.split-lp, %50, %39
  %.pn = phi { ptr, i32 } [ %40, %39 ], [ %51, %50 ], [ %lpad.loopexit, %.loopexit ], [ %lpad.loopexit.split-lp, %.loopexit.split-lp ]
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #3
  br label %63

63:                                               ; preds = %62, %37
  %.pn.pn = phi { ptr, i32 } [ %.pn, %62 ], [ %38, %37 ]
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #3
  resume { ptr, i32 } %.pn.pn
}

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(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 noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32), i8 noundef signext) local_unnamed_addr #2 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 #2

; 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 uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

attributes #0 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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