; LLVM IR from 6leetcode/6leetcode :: questions/Algorithms/0023. Merge k Sorted Lists (Solution)

; 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::__cxx11::basic_stringstream" = type { %"class.std::basic_iostream.base", %"class.std::__cxx11::basic_stringbuf", %"class.std::basic_ios" }
%"class.std::basic_iostream.base" = type { %"class.std::basic_istream.base", %"class.std::basic_ostream.base" }
%"class.std::basic_istream.base" = type { ptr, i64 }
%"class.std::basic_ostream.base" = type { ptr }
%"class.std::__cxx11::basic_stringbuf" = type { %"class.std::basic_streambuf", i32, %"class.std::__cxx11::basic_string" }
%"class.std::basic_streambuf" = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, %"class.std::locale" }
%"class.std::locale" = type { ptr }
%"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 }

@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z13ListNode_showB5cxx11P8ListNode(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef) #0

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

; Function Attrs: mustprogress uwtable
declare void @_ZNSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEEC1Ev(ptr noundef nonnull align 8 dereferenceable(128)) unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; 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) #2

; Function Attrs: mustprogress uwtable
declare void @_ZNKSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEE3strEv(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(128)) #0 align 2

; 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__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(128)) unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z20ListNode_vector_showB5cxx11St6vectorIP8ListNodeSaIS1_EE(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef %1) #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca %"class.std::__cxx11::basic_stringstream", align 8
  %6 = alloca i64, align 8
  %7 = alloca %"class.std::__cxx11::basic_string", align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca %"class.std::__cxx11::basic_string", align 8
  store ptr %0, ptr %3, align 8
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 392, ptr %5) #4
  call void @_ZNSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEEC1Ev(ptr noundef nonnull align 8 dereferenceable(128) %5)
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  store i64 0, ptr %6, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %60, %2
  %12 = load i64, ptr %6, align 8, !tbaa !9
  %13 = call noundef i64 @_ZNKSt6vectorIP8ListNodeSaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #4
  %14 = icmp ult i64 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br label %64

16:                                               ; preds = %11
  %17 = load i64, ptr %6, align 8, !tbaa !9
  %18 = icmp eq i64 %17, 0
  br i1 %18, label %19, label %36

19:                                               ; preds = %16
  %20 = getelementptr inbounds i8, ptr %5, i64 16
  call void @llvm.lifetime.start.p0(i64 32, ptr %7) #4
  %21 = load i64, ptr %6, align 8, !tbaa !9
  %22 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIP8ListNodeSaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %21) #4
  %23 = load ptr, ptr %22, align 8, !tbaa !5
  invoke void @_Z13ListNode_showB5cxx11P8ListNode(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %7, ptr noundef %23)
          to label %24 unwind label %27

24:                                               ; preds = %19
  %25 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsIcSt11char_traitsIcESaIcEERSt13basic_ostreamIT_T0_ES7_RKNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(8) %20, ptr noundef nonnull align 8 dereferenceable(32) %7)
          to label %26 unwind label %31

26:                                               ; preds = %24
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %7) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %7) #4
  br label %59

27:                                               ; preds = %19
  %28 = landingpad { ptr, i32 }
          cleanup
  %29 = extractvalue { ptr, i32 } %28, 0
  store ptr %29, ptr %8, align 8
  %30 = extractvalue { ptr, i32 } %28, 1
  store i32 %30, ptr %9, align 4
  br label %35

31:                                               ; preds = %24
  %32 = landingpad { ptr, i32 }
          cleanup
  %33 = extractvalue { ptr, i32 } %32, 0
  store ptr %33, ptr %8, align 8
  %34 = extractvalue { ptr, i32 } %32, 1
  store i32 %34, ptr %9, align 4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %7) #4
  br label %35

35:                                               ; preds = %31, %27
  call void @llvm.lifetime.end.p0(i64 32, ptr %7) #4
  br label %63

36:                                               ; preds = %16
  %37 = getelementptr inbounds i8, ptr %5, i64 16
  %38 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %37, ptr noundef @.str.1)
          to label %39 unwind label %46

39:                                               ; preds = %36
  call void @llvm.lifetime.start.p0(i64 32, ptr %10) #4
  %40 = load i64, ptr %6, align 8, !tbaa !9
  %41 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIP8ListNodeSaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %40) #4
  %42 = load ptr, ptr %41, align 8, !tbaa !5
  invoke void @_Z13ListNode_showB5cxx11P8ListNode(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %10, ptr noundef %42)
          to label %43 unwind label %50

43:                                               ; preds = %39
  %44 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsIcSt11char_traitsIcESaIcEERSt13basic_ostreamIT_T0_ES7_RKNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(8) %38, ptr noundef nonnull align 8 dereferenceable(32) %10)
          to label %45 unwind label %54

45:                                               ; preds = %43
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %10) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %10) #4
  br label %59

46:                                               ; preds = %36
  %47 = landingpad { ptr, i32 }
          cleanup
  %48 = extractvalue { ptr, i32 } %47, 0
  store ptr %48, ptr %8, align 8
  %49 = extractvalue { ptr, i32 } %47, 1
  store i32 %49, ptr %9, align 4
  br label %63

50:                                               ; preds = %39
  %51 = landingpad { ptr, i32 }
          cleanup
  %52 = extractvalue { ptr, i32 } %51, 0
  store ptr %52, ptr %8, align 8
  %53 = extractvalue { ptr, i32 } %51, 1
  store i32 %53, ptr %9, align 4
  br label %58

54:                                               ; preds = %43
  %55 = landingpad { ptr, i32 }
          cleanup
  %56 = extractvalue { ptr, i32 } %55, 0
  store ptr %56, ptr %8, align 8
  %57 = extractvalue { ptr, i32 } %55, 1
  store i32 %57, ptr %9, align 4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %10) #4
  br label %58

58:                                               ; preds = %54, %50
  call void @llvm.lifetime.end.p0(i64 32, ptr %10) #4
  br label %63

59:                                               ; preds = %45, %26
  br label %60

60:                                               ; preds = %59
  %61 = load i64, ptr %6, align 8, !tbaa !9
  %62 = add i64 %61, 1
  store i64 %62, ptr %6, align 8, !tbaa !9
  br label %11, !llvm.loop !11

63:                                               ; preds = %58, %46, %35
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br label %70

64:                                               ; preds = %15
  invoke void @_ZNKSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEE3strEv(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef nonnull align 8 dereferenceable(128) %5)
          to label %65 unwind label %66

65:                                               ; preds = %64
  call void @_ZNSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(128) %5) #4
  call void @llvm.lifetime.end.p0(i64 392, ptr %5) #4
  ret void

66:                                               ; preds = %64
  %67 = landingpad { ptr, i32 }
          cleanup
  %68 = extractvalue { ptr, i32 } %67, 0
  store ptr %68, ptr %8, align 8
  %69 = extractvalue { ptr, i32 } %67, 1
  store i32 %69, ptr %9, align 4
  br label %70

70:                                               ; preds = %66, %63
  call void @_ZNSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(128) %5) #4
  call void @llvm.lifetime.end.p0(i64 392, ptr %5) #4
  br label %71

71:                                               ; preds = %70
  %72 = load ptr, ptr %8, align 8
  %73 = load i32, ptr %9, align 4
  %74 = insertvalue { ptr, i32 } poison, ptr %72, 0
  %75 = insertvalue { ptr, i32 } %74, i32 %73, 1
  resume { ptr, i32 } %75
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIP8ListNodeSaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #3 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsIcSt11char_traitsIcESaIcEERSt13basic_ostreamIT_T0_ES7_RKNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(32)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIP8ListNodeSaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #3 align 2

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { 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 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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

%"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::__cxx11::basic_stringstream" = type { %"class.std::basic_iostream.base", %"class.std::__cxx11::basic_stringbuf", %"class.std::basic_ios" }
%"class.std::basic_iostream.base" = type { %"class.std::basic_istream.base", %"class.std::basic_ostream.base" }
%"class.std::basic_istream.base" = type { ptr, i64 }
%"class.std::basic_ostream.base" = type { ptr }
%"class.std::__cxx11::basic_stringbuf" = type { %"class.std::basic_streambuf", i32, %"class.std::__cxx11::basic_string" }
%"class.std::basic_streambuf" = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, %"class.std::locale" }
%"class.std::locale" = type { ptr }
%"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 }

@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z13ListNode_showB5cxx11P8ListNode(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef) local_unnamed_addr #0

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

; Function Attrs: mustprogress uwtable
declare void @_ZNSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEEC1Ev(ptr noundef nonnull align 8 dereferenceable(128)) unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; 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 #2

; Function Attrs: mustprogress uwtable
declare void @_ZNKSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEE3strEv(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(128)) local_unnamed_addr #0 align 2

; 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__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(128)) unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z20ListNode_vector_showB5cxx11St6vectorIP8ListNodeSaIS1_EE(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef %1) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::__cxx11::basic_stringstream", align 8
  %4 = alloca %"class.std::__cxx11::basic_string", align 8
  %5 = alloca %"class.std::__cxx11::basic_string", align 8
  call void @llvm.lifetime.start.p0(i64 392, ptr nonnull %3) #4
  call void @_ZNSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEEC1Ev(ptr noundef nonnull align 8 dereferenceable(128) %3)
  %6 = call noundef i64 @_ZNKSt6vectorIP8ListNodeSaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #4
  %.not = icmp eq i64 %6, 0
  br i1 %.not, label %._crit_edge, label %7

7:                                                ; preds = %2
  %8 = getelementptr inbounds i8, ptr %3, i64 16
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %4) #4
  %9 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIP8ListNodeSaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef 0) #4
  %10 = load ptr, ptr %9, align 8, !tbaa !5
  invoke void @_Z13ListNode_showB5cxx11P8ListNode(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %4, ptr noundef %10)
          to label %11 unwind label %16

11:                                               ; preds = %7
  %12 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsIcSt11char_traitsIcESaIcEERSt13basic_ostreamIT_T0_ES7_RKNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(8) %8, ptr noundef nonnull align 8 dereferenceable(32) %4)
          to label %13 unwind label %17

13:                                               ; preds = %11
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %4) #4
  %14 = call noundef i64 @_ZNKSt6vectorIP8ListNodeSaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #4
  %15 = icmp ugt i64 %14, 1
  br i1 %15, label %.peel.next, label %._crit_edge

._crit_edge:                                      ; preds = %29, %13, %2
  invoke void @_ZNKSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEE3strEv(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef nonnull align 8 dereferenceable(128) %3)
          to label %33 unwind label %34

16:                                               ; preds = %7
  %lpad.loopexit.split-lp31 = landingpad { ptr, i32 }
          cleanup
  br label %18

17:                                               ; preds = %11
  %lpad.loopexit.split-lp36 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #4
  br label %18

18:                                               ; preds = %17, %16
  %.pn12 = phi { ptr, i32 } [ %lpad.loopexit.split-lp36, %17 ], [ %lpad.loopexit.split-lp31, %16 ]
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %4) #4
  br label %36

.peel.next:                                       ; preds = %13, %29
  %.01016 = phi i64 [ %30, %29 ], [ 1, %13 ]
  %19 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %8, ptr noundef nonnull @.str.1)
          to label %20 unwind label %25

20:                                               ; preds = %.peel.next
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %5) #4
  %21 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIP8ListNodeSaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %.01016) #4
  %22 = load ptr, ptr %21, align 8, !tbaa !5
  invoke void @_Z13ListNode_showB5cxx11P8ListNode(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %5, ptr noundef %22)
          to label %23 unwind label %26

23:                                               ; preds = %20
  %24 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsIcSt11char_traitsIcESaIcEERSt13basic_ostreamIT_T0_ES7_RKNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(8) %19, ptr noundef nonnull align 8 dereferenceable(32) %5)
          to label %29 unwind label %27

25:                                               ; preds = %.peel.next
  %lpad.loopexit = landingpad { ptr, i32 }
          cleanup
  br label %36

26:                                               ; preds = %20
  %lpad.loopexit20 = landingpad { ptr, i32 }
          cleanup
  br label %28

27:                                               ; preds = %23
  %lpad.loopexit25 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #4
  br label %28

28:                                               ; preds = %27, %26
  %.pn = phi { ptr, i32 } [ %lpad.loopexit25, %27 ], [ %lpad.loopexit20, %26 ]
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #4
  br label %36

29:                                               ; preds = %23
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #4
  %30 = add nuw i64 %.01016, 1
  %31 = call noundef i64 @_ZNKSt6vectorIP8ListNodeSaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #4
  %32 = icmp ult i64 %30, %31
  br i1 %32, label %.peel.next, label %._crit_edge, !llvm.loop !9

33:                                               ; preds = %._crit_edge
  call void @_ZNSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(128) %3) #4
  call void @llvm.lifetime.end.p0(i64 392, ptr nonnull %3) #4
  ret void

34:                                               ; preds = %._crit_edge
  %35 = landingpad { ptr, i32 }
          cleanup
  br label %36

36:                                               ; preds = %18, %25, %28, %34
  %.pn12.pn.pn = phi { ptr, i32 } [ %35, %34 ], [ %.pn12, %18 ], [ %.pn, %28 ], [ %lpad.loopexit, %25 ]
  call void @_ZNSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(128) %3) #4
  call void @llvm.lifetime.end.p0(i64 392, ptr nonnull %3) #4
  resume { ptr, i32 } %.pn12.pn.pn
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIP8ListNodeSaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #3 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsIcSt11char_traitsIcESaIcEERSt13basic_ostreamIT_T0_ES7_RKNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIP8ListNodeSaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #3 align 2

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { 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 = distinct !{!9, !10, !11}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.peeled.count", i32 1}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopFullUnrollPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SCCPPass,SROAPass,SimplifyCFGPass