; LLVM IR from martinus/nanobench :: src/comparisons/nanobench/main.ll (ZN6ankerl9nanobench6detail3fmt4to_sB5cxx11Em)

; 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.3 }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon.3 = type { i64, [8 x i8] }
%"class.__gnu_cxx::__normal_iterator.41" = type { ptr }

declare i32 @__gxx_personality_v0(...)

; 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 uwtable
define dso_local void @_ZN6ankerl9nanobench6detail3fmt4to_sB5cxx11Em(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, i64 noundef %1) #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i1, align 1
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca %"class.__gnu_cxx::__normal_iterator.41", align 8
  %9 = alloca %"class.__gnu_cxx::__normal_iterator.41", align 8
  store ptr %0, ptr %3, align 8
  store i64 %1, ptr %4, align 8, !tbaa !5
  store i1 false, ptr %5, align 1
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  br label %10

10:                                               ; preds = %21, %2
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = urem i64 %11, 10
  %13 = trunc i64 %12 to i8
  %14 = sext i8 %13 to i32
  %15 = add nsw i32 48, %14
  %16 = trunc i32 %15 to i8
  %17 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %0, i8 noundef signext %16)
          to label %18 unwind label %35

18:                                               ; preds = %10
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = udiv i64 %19, 10
  store i64 %20, ptr %4, align 8, !tbaa !5
  br label %21

21:                                               ; preds = %18
  %22 = load i64, ptr %4, align 8, !tbaa !5
  %23 = icmp ne i64 %22, 0
  br i1 %23, label %10, label %24, !llvm.loop !9

24:                                               ; preds = %21
  %25 = call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %26 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator.41", ptr %8, i32 0, i32 0
  store ptr %25, ptr %26, align 8
  %27 = call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE3endEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %28 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator.41", ptr %9, i32 0, i32 0
  store ptr %27, ptr %28, align 8
  %29 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator.41", ptr %8, i32 0, i32 0
  %30 = load ptr, ptr %29, align 8
  %31 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator.41", ptr %9, i32 0, i32 0
  %32 = load ptr, ptr %31, align 8
  invoke void @_ZSt7reverseIN9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEEvT_SA_(ptr %30, ptr %32)
          to label %33 unwind label %35

33:                                               ; preds = %24
  store i1 true, ptr %5, align 1
  %34 = load i1, ptr %5, align 1
  br i1 %34, label %40, label %39

35:                                               ; preds = %24, %10
  %36 = landingpad { ptr, i32 }
          cleanup
  %37 = extractvalue { ptr, i32 } %36, 0
  store ptr %37, ptr %6, align 8
  %38 = extractvalue { ptr, i32 } %36, 1
  store i32 %38, ptr %7, align 4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  br label %41

39:                                               ; preds = %33
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  br label %40

40:                                               ; preds = %39, %33
  ret void

41:                                               ; preds = %35
  %42 = load ptr, ptr %6, align 8
  %43 = load i32, ptr %7, align 4
  %44 = insertvalue { ptr, i32 } poison, ptr %42, 0
  %45 = insertvalue { ptr, i32 } %44, i32 %43, 1
  resume { ptr, i32 } %45
}

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) 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) #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt7reverseIN9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEEvT_SA_(ptr, ptr) #2

; Function Attrs: mustprogress nounwind uwtable
declare ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE3endEv(ptr noundef nonnull align 8 dereferenceable(32)) #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 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 = { 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 = { 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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.3 }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon.3 = type { i64, [8 x i8] }

declare i32 @__gxx_personality_v0(...)

; 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 uwtable
define dso_local void @_ZN6ankerl9nanobench6detail3fmt4to_sB5cxx11Em(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %0, i64 noundef %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  tail call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  br label %3

3:                                                ; preds = %9, %2
  %.0 = phi i64 [ %1, %2 ], [ %5, %9 ]
  %4 = urem i64 %.0, 10
  %5 = udiv i64 %.0, 10
  %6 = trunc nuw nsw i64 %4 to i8
  %7 = or disjoint i8 %6, 48
  %8 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %0, i8 noundef signext %7)
          to label %9 unwind label %.loopexit

9:                                                ; preds = %3
  %.not = icmp ult i64 %.0, 10
  br i1 %.not, label %10, label %3, !llvm.loop !5

10:                                               ; preds = %9
  %11 = tail call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %12 = tail call ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE3endEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  invoke void @_ZSt7reverseIN9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEEvT_SA_(ptr %11, ptr %12)
          to label %14 unwind label %.loopexit.split-lp

.loopexit:                                        ; preds = %3
  %lpad.loopexit = landingpad { ptr, i32 }
          cleanup
  br label %13

.loopexit.split-lp:                               ; preds = %10
  %lpad.loopexit.split-lp = landingpad { ptr, i32 }
          cleanup
  br label %13

13:                                               ; preds = %.loopexit.split-lp, %.loopexit
  %lpad.phi = phi { ptr, i32 } [ %lpad.loopexit, %.loopexit ], [ %lpad.loopexit.split-lp, %.loopexit.split-lp ]
  tail call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  resume { ptr, i32 } %lpad.phi

14:                                               ; preds = %10
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) 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 #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt7reverseIN9__gnu_cxx17__normal_iteratorIPcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEEvT_SA_(ptr, ptr) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5beginEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE3endEv(ptr noundef nonnull align 8 dereferenceable(32)) local_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 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 = { 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 = { 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: DivRemPairsPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InstCombinePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass