; LLVM IR from IOsonata/IOsonata :: src (utf8)

; 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"

; Function Attrs: nounwind uwtable
declare dso_local i32 @uft8towcs_octetcount(i8 noundef signext) #0

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

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

; Function Attrs: nounwind uwtable
define dso_local i64 @utf8towcs_length(ptr noundef %0, i64 noundef %1, i64 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i64 0, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  store i64 0, ptr %9, align 8, !tbaa !9
  br label %10

10:                                               ; preds = %34, %3
  %11 = load i64, ptr %9, align 8, !tbaa !9
  %12 = load i64, ptr %5, align 8, !tbaa !9
  %13 = icmp ult i64 %11, %12
  br i1 %13, label %14, label %18

14:                                               ; preds = %10
  %15 = load i64, ptr %7, align 8, !tbaa !9
  %16 = load i64, ptr %6, align 8, !tbaa !9
  %17 = icmp ult i64 %15, %16
  br label %18

18:                                               ; preds = %14, %10
  %19 = phi i1 [ false, %10 ], [ %17, %14 ]
  br i1 %19, label %20, label %40

20:                                               ; preds = %18
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = load i8, ptr %21, align 1, !tbaa !11
  %23 = call i32 @uft8towcs_octetcount(i8 noundef signext %22)
  %24 = sext i32 %23 to i64
  store i64 %24, ptr %8, align 8, !tbaa !9
  %25 = load i64, ptr %8, align 8, !tbaa !9
  %26 = icmp ule i64 %25, 0
  br i1 %26, label %33, label %27

27:                                               ; preds = %20
  %28 = load i64, ptr %9, align 8, !tbaa !9
  %29 = load i64, ptr %8, align 8, !tbaa !9
  %30 = add i64 %28, %29
  %31 = load i64, ptr %5, align 8, !tbaa !9
  %32 = icmp ugt i64 %30, %31
  br i1 %32, label %33, label %34

33:                                               ; preds = %27, %20
  br label %40

34:                                               ; preds = %27
  %35 = load i64, ptr %7, align 8, !tbaa !9
  %36 = add i64 %35, 1
  store i64 %36, ptr %7, align 8, !tbaa !9
  %37 = load i64, ptr %8, align 8, !tbaa !9
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = getelementptr inbounds i8, ptr %38, i64 %37
  store ptr %39, ptr %4, align 8, !tbaa !5
  br label %10, !llvm.loop !12

40:                                               ; preds = %33, %18
  %41 = load i64, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret i64 %41
}

attributes #0 = { 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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !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"

; Function Attrs: nounwind uwtable
declare dso_local i32 @uft8towcs_octetcount(i8 noundef signext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i64 @utf8towcs_length(ptr nocapture noundef readonly %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = icmp ne i64 %1, 0
  %5 = icmp ne i64 %2, 0
  %6 = and i1 %4, %5
  br i1 %6, label %.lr.ph.split, label %._crit_edge

.lr.ph.split:                                     ; preds = %3, %12
  %.016 = phi ptr [ %14, %12 ], [ %0, %3 ]
  %.01215 = phi i64 [ %13, %12 ], [ 0, %3 ]
  %7 = load i8, ptr %.016, align 1, !tbaa !5
  %8 = tail call i32 @uft8towcs_octetcount(i8 noundef signext %7)
  %9 = sext i32 %8 to i64
  %10 = icmp eq i32 %8, 0
  %11 = icmp ugt i64 %9, %1
  %or.cond = or i1 %10, %11
  br i1 %or.cond, label %._crit_edge, label %12

12:                                               ; preds = %.lr.ph.split
  %13 = add nuw i64 %.01215, 1
  %14 = getelementptr inbounds i8, ptr %.016, i64 %9
  %exitcond.not = icmp eq i64 %13, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph.split, !llvm.loop !8

._crit_edge:                                      ; preds = %12, %.lr.ph.split, %3
  %.012.lcssa = phi i64 [ 0, %3 ], [ %.01215, %.lr.ph.split ], [ %2, %12 ]
  ret i64 %.012.lcssa
}

attributes #0 = { 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" }

!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/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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