; LLVM IR from opset/openset :: lib/str/strtools.ll/Z8cleanStrNSt7 (cxx1112basic_stringIcSt11char_traitsIcESaIcEEES4_)

; 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 }

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

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

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

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 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 nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8cleanStrNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES4_(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef %1, ptr noundef %2) #2 personality ptr @__gxx_personality_v0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i1, align 1
  %8 = alloca %"class.std::allocator", align 1
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca ptr, align 8
  %12 = alloca ptr, align 8
  %13 = alloca i8, align 1
  store ptr %0, ptr %4, align 8
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  store i1 false, ptr %7, align 1
  call void @llvm.lifetime.start.p0(i64 1, ptr %8) #3
  call void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %8) #3
  invoke void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2IS3_EEPKcRKS3_(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str, ptr noundef nonnull align 1 dereferenceable(1) %8)
          to label %14 unwind label %35

14:                                               ; preds = %3
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %8) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  %15 = call noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #3
  store ptr %15, ptr %11, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #3
  call void @llvm.lifetime.start.p0(i64 1, ptr %13) #3
  store i8 0, ptr %13, align 1, !tbaa !9
  br label %16

16:                                               ; preds = %51, %45, %14
  %17 = load ptr, ptr %11, align 8, !tbaa !5
  %18 = load i8, ptr %17, align 1, !tbaa !11
  %19 = icmp ne i8 %18, 0
  br i1 %19, label %20, label %58

20:                                               ; preds = %16
  store i8 0, ptr %13, align 1, !tbaa !9
  %21 = call noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32) %2) #3
  store ptr %21, ptr %12, align 8, !tbaa !5
  br label %22

22:                                               ; preds = %39, %20
  %23 = load ptr, ptr %12, align 8, !tbaa !5
  %24 = load i8, ptr %23, align 1, !tbaa !11
  %25 = icmp ne i8 %24, 0
  br i1 %25, label %26, label %42

26:                                               ; preds = %22
  %27 = load ptr, ptr %12, align 8, !tbaa !5
  %28 = load i8, ptr %27, align 1, !tbaa !11
  %29 = sext i8 %28 to i32
  %30 = load ptr, ptr %11, align 8, !tbaa !5
  %31 = load i8, ptr %30, align 1, !tbaa !11
  %32 = sext i8 %31 to i32
  %33 = icmp eq i32 %29, %32
  br i1 %33, label %34, label %39

34:                                               ; preds = %26
  store i8 1, ptr %13, align 1, !tbaa !9
  br label %42

35:                                               ; preds = %3
  %36 = landingpad { ptr, i32 }
          cleanup
  %37 = extractvalue { ptr, i32 } %36, 0
  store ptr %37, ptr %9, align 8
  %38 = extractvalue { ptr, i32 } %36, 1
  store i32 %38, ptr %10, align 4
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %8) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #3
  br label %62

39:                                               ; preds = %26
  %40 = load ptr, ptr %12, align 8, !tbaa !5
  %41 = getelementptr inbounds i8, ptr %40, i32 1
  store ptr %41, ptr %12, align 8, !tbaa !5
  br label %22, !llvm.loop !12

42:                                               ; preds = %34, %22
  %43 = load i8, ptr %13, align 1, !tbaa !9, !range !14, !noundef !15
  %44 = trunc i8 %43 to i1
  br i1 %44, label %45, label %48

45:                                               ; preds = %42
  %46 = load ptr, ptr %11, align 8, !tbaa !5
  %47 = getelementptr inbounds i8, ptr %46, i32 1
  store ptr %47, ptr %11, align 8, !tbaa !5
  br label %16, !llvm.loop !16

48:                                               ; preds = %42
  %49 = load ptr, ptr %11, align 8, !tbaa !5
  %50 = load i8, ptr %49, align 1, !tbaa !11
  invoke void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9push_backEc(ptr noundef nonnull align 8 dereferenceable(32) %0, i8 noundef signext %50)
          to label %51 unwind label %54

51:                                               ; preds = %48
  %52 = load ptr, ptr %11, align 8, !tbaa !5
  %53 = getelementptr inbounds i8, ptr %52, i32 1
  store ptr %53, ptr %11, align 8, !tbaa !5
  br label %16, !llvm.loop !16

54:                                               ; preds = %48
  %55 = landingpad { ptr, i32 }
          cleanup
  %56 = extractvalue { ptr, i32 } %55, 0
  store ptr %56, ptr %9, align 8
  %57 = extractvalue { ptr, i32 } %55, 1
  store i32 %57, ptr %10, align 4
  call void @llvm.lifetime.end.p0(i64 1, ptr %13) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  br label %62

58:                                               ; preds = %16
  store i1 true, ptr %7, align 1
  call void @llvm.lifetime.end.p0(i64 1, ptr %13) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  %59 = load i1, ptr %7, align 1
  br i1 %59, label %61, label %60

60:                                               ; preds = %58
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  br label %61

61:                                               ; preds = %60, %58
  ret void

62:                                               ; preds = %54, %35
  %63 = load ptr, ptr %9, align 8
  %64 = load i32, ptr %10, align 4
  %65 = insertvalue { ptr, i32 } poison, ptr %63, 0
  %66 = insertvalue { ptr, i32 } %65, i32 %64, 1
  resume { ptr, i32 } %66
}

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32)) #1 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9push_backEc(ptr noundef nonnull align 8 dereferenceable(32), i8 noundef signext) #2 align 2

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{i8 0, i8 2}
!15 = !{}
!16 = distinct !{!16, !13}


; 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 }

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

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

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

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 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 nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8cleanStrNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES4_(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, ptr noundef %1, ptr noundef %2) local_unnamed_addr #2 personality ptr @__gxx_personality_v0 {
  %4 = alloca %"class.std::allocator", align 1
  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) %0, ptr noundef nonnull @.str, ptr noundef nonnull align 1 dereferenceable(1) %4)
          to label %5 unwind label %15

5:                                                ; preds = %3
  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
  %6 = call noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #3
  %7 = load i8, ptr %6, align 1, !tbaa !5
  %.not20 = icmp eq i8 %7, 0
  br i1 %.not20, label %._crit_edge, label %.lr.ph22

.lr.ph22:                                         ; preds = %5, %.backedge
  %.01221 = phi ptr [ %.012.be, %.backedge ], [ %6, %5 ]
  %8 = call noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32) %2) #3
  %9 = load i8, ptr %8, align 1, !tbaa !5
  %.not16.not18 = icmp eq i8 %9, 0
  %.pre = load i8, ptr %.01221, align 1, !tbaa !5
  br i1 %.not16.not18, label %.critedge, label %.lr.ph

10:                                               ; preds = %.lr.ph
  %11 = getelementptr inbounds i8, ptr %.01119, i64 1
  %12 = load i8, ptr %11, align 1, !tbaa !5
  %.not16.not = icmp eq i8 %12, 0
  br i1 %.not16.not, label %.critedge, label %.lr.ph, !llvm.loop !8

.lr.ph:                                           ; preds = %.lr.ph22, %10
  %13 = phi i8 [ %12, %10 ], [ %9, %.lr.ph22 ]
  %.01119 = phi ptr [ %11, %10 ], [ %8, %.lr.ph22 ]
  %14 = icmp eq i8 %13, %.pre
  br i1 %14, label %.backedge, label %10

15:                                               ; preds = %3
  %16 = 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 %20

.backedge:                                        ; preds = %.lr.ph, %.critedge
  %.012.be = getelementptr inbounds i8, ptr %.01221, i64 1
  %17 = load i8, ptr %.012.be, align 1, !tbaa !5
  %.not = icmp eq i8 %17, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph22, !llvm.loop !10

.critedge:                                        ; preds = %10, %.lr.ph22
  invoke void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9push_backEc(ptr noundef nonnull align 8 dereferenceable(32) %0, i8 noundef signext %.pre)
          to label %.backedge unwind label %18

18:                                               ; preds = %.critedge
  %19 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  br label %20

._crit_edge:                                      ; preds = %.backedge, %5
  ret void

20:                                               ; preds = %18, %15
  %.pn = phi { ptr, i32 } [ %19, %18 ], [ %16, %15 ]
  resume { ptr, i32 } %.pn
}

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9push_backEc(ptr noundef nonnull align 8 dereferenceable(32), i8 noundef signext) 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 #1 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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"}
!10 = distinct !{!10, !9}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass