; LLVM IR from mncoppola/rpef :: utilities_src/squashfs2.1/lzma/C/Common (StringConvert)

; 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.CStringBase = type { ptr, i32, i32 }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z24MultiByteToUnicodeStringRK11CStringBaseIcEj(ptr dead_on_unwind noalias writable sret(%class.CStringBase) align 8 %0, ptr noundef nonnull align 8 dereferenceable(16) %1, i32 noundef %2) #0 personality ptr @__gxx_personality_v0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i1, align 1
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  store ptr %0, ptr %4, align 8
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  store i1 false, ptr %7, align 1
  call void @_ZN11CStringBaseIwEC2Ev(ptr noundef nonnull align 8 dereferenceable(16) %0)
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %33, %3
  %12 = load i32, ptr %8, align 4, !tbaa !9
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = invoke noundef i32 @_ZNK11CStringBaseIcE6LengthEv(ptr noundef nonnull align 8 dereferenceable(16) %13)
          to label %15 unwind label %18

15:                                               ; preds = %11
  %16 = icmp slt i32 %12, %14
  br i1 %16, label %22, label %17

17:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %36

18:                                               ; preds = %25, %22, %11
  %19 = landingpad { ptr, i32 }
          cleanup
  %20 = extractvalue { ptr, i32 } %19, 0
  store ptr %20, ptr %9, align 8
  %21 = extractvalue { ptr, i32 } %19, 1
  store i32 %21, ptr %10, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @_ZN11CStringBaseIwED2Ev(ptr noundef nonnull align 8 dereferenceable(16) %0) #3
  br label %40

22:                                               ; preds = %15
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = invoke noundef ptr @_ZNK11CStringBaseIcEcvPKcEv(ptr noundef nonnull align 8 dereferenceable(16) %23)
          to label %25 unwind label %18

25:                                               ; preds = %22
  %26 = load i32, ptr %8, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i8, ptr %24, i64 %27
  %29 = load i8, ptr %28, align 1, !tbaa !11
  %30 = sext i8 %29 to i32
  %31 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZN11CStringBaseIwEpLEw(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef signext %30)
          to label %32 unwind label %18

32:                                               ; preds = %25
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %8, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %8, align 4, !tbaa !9
  br label %11, !llvm.loop !12

36:                                               ; preds = %17
  store i1 true, ptr %7, align 1
  %37 = load i1, ptr %7, align 1
  br i1 %37, label %39, label %38

38:                                               ; preds = %36
  call void @_ZN11CStringBaseIwED2Ev(ptr noundef nonnull align 8 dereferenceable(16) %0) #3
  br label %39

39:                                               ; preds = %38, %36
  ret void

40:                                               ; preds = %18
  %41 = load ptr, ptr %9, align 8
  %42 = load i32, ptr %10, align 4
  %43 = insertvalue { ptr, i32 } poison, ptr %41, 0
  %44 = insertvalue { ptr, i32 } %43, i32 %42, 1
  resume { ptr, i32 } %44
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN11CStringBaseIwEC2Ev(ptr noundef nonnull align 8 dereferenceable(16)) 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 dso_local noundef i32 @_ZNK11CStringBaseIcE6LengthEv(ptr noundef nonnull align 8 dereferenceable(16)) #2 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK11CStringBaseIcEcvPKcEv(ptr noundef nonnull align 8 dereferenceable(16)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZN11CStringBaseIwEpLEw(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef signext) #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 dso_local void @_ZN11CStringBaseIwED2Ev(ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #2 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 = { 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 = { 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 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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.CStringBase = type { ptr, i32, i32 }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z24MultiByteToUnicodeStringRK11CStringBaseIcEj(ptr dead_on_unwind noalias nonnull writable sret(%class.CStringBase) align 8 %0, ptr noundef nonnull align 8 dereferenceable(16) %1, i32 noundef %2) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  tail call void @_ZN11CStringBaseIwEC2Ev(ptr noundef nonnull align 8 dereferenceable(16) %0)
  %4 = tail call noundef i32 @_ZNK11CStringBaseIcE6LengthEv(ptr noundef nonnull align 8 dereferenceable(16) %1)
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph, label %._crit_edge

6:                                                ; preds = %.lr.ph
  %7 = landingpad { ptr, i32 }
          cleanup
  tail call void @_ZN11CStringBaseIwED2Ev(ptr noundef nonnull align 8 dereferenceable(16) %0) #2
  resume { ptr, i32 } %7

.lr.ph:                                           ; preds = %3, %13
  %indvars.iv = phi i64 [ %indvars.iv.next, %13 ], [ 0, %3 ]
  %8 = tail call noundef ptr @_ZNK11CStringBaseIcEcvPKcEv(ptr noundef nonnull align 8 dereferenceable(16) %1)
  %9 = getelementptr inbounds i8, ptr %8, i64 %indvars.iv
  %10 = load i8, ptr %9, align 1, !tbaa !5
  %11 = sext i8 %10 to i32
  %12 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZN11CStringBaseIwEpLEw(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef signext %11)
          to label %13 unwind label %6

13:                                               ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %14 = tail call noundef i32 @_ZNK11CStringBaseIcE6LengthEv(ptr noundef nonnull align 8 dereferenceable(16) %1)
  %15 = sext i32 %14 to i64
  %16 = icmp slt i64 %indvars.iv.next, %15
  br i1 %16, label %.lr.ph, label %._crit_edge, !llvm.loop !8

._crit_edge:                                      ; preds = %13, %3
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN11CStringBaseIwEC2Ev(ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK11CStringBaseIcE6LengthEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK11CStringBaseIcEcvPKcEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZN11CStringBaseIwEpLEw(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef signext) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN11CStringBaseIwED2Ev(ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #1 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 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 = { 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: EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass