; LLVM IR from microsoft/LightAIMD :: 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: 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

declare ptr @x_malloc(i64 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @utf8_cstr_to_codepoints(ptr noundef %0, ptr noundef %1, ptr noundef %2) #2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = call i64 @strlen(ptr noundef %10) #5
  store i64 %11, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %12 = load i64, ptr %7, align 8, !tbaa !9
  %13 = mul i64 %12, 4
  %14 = call ptr @x_malloc(i64 noundef %13)
  store ptr %14, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #4
  store i64 0, ptr %9, align 8, !tbaa !9
  br label %15

15:                                               ; preds = %29, %3
  %16 = load i64, ptr %9, align 8, !tbaa !9
  %17 = load i64, ptr %7, align 8, !tbaa !9
  %18 = icmp ult i64 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #4
  br label %32

20:                                               ; preds = %15
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = load i64, ptr %9, align 8, !tbaa !9
  %23 = getelementptr inbounds i8, ptr %21, i64 %22
  %24 = load i8, ptr %23, align 1, !tbaa !11
  %25 = sext i8 %24 to i32
  %26 = load ptr, ptr %8, align 8, !tbaa !5
  %27 = load i64, ptr %9, align 8, !tbaa !9
  %28 = getelementptr inbounds i32, ptr %26, i64 %27
  store i32 %25, ptr %28, align 4, !tbaa !12
  br label %29

29:                                               ; preds = %20
  %30 = load i64, ptr %9, align 8, !tbaa !9
  %31 = add i64 %30, 1
  store i64 %31, ptr %9, align 8, !tbaa !9
  br label %15, !llvm.loop !14

32:                                               ; preds = %19
  %33 = load ptr, ptr %8, align 8, !tbaa !5
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %33, ptr %34, align 8, !tbaa !5
  %35 = load i64, ptr %7, align 8, !tbaa !9
  %36 = load ptr, ptr %6, align 8, !tbaa !5
  store i64 %35, ptr %36, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  ret void
}

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 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 willreturn memory(read) "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 }
attributes #5 = { nounwind willreturn memory(read) }

!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 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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"

declare ptr @x_malloc(i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @utf8_cstr_to_codepoints(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #1 {
  %4 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0) #3
  %5 = shl i64 %4, 2
  %6 = tail call ptr @x_malloc(i64 noundef %5) #4
  %.not = icmp eq i64 %4, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %min.iters.check = icmp ult i64 %4, 12
  br i1 %min.iters.check, label %.lr.ph.preheader16, label %vector.memcheck

.lr.ph.preheader16:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %.013.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %4, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader16, %.lr.ph.prol
  %.013.prol = phi i64 [ %11, %.lr.ph.prol ], [ %.013.ph, %.lr.ph.preheader16 ]
  %prol.iter = phi i64 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader16 ]
  %7 = getelementptr inbounds i8, ptr %0, i64 %.013.prol
  %8 = load i8, ptr %7, align 1, !tbaa !5
  %9 = sext i8 %8 to i32
  %10 = getelementptr inbounds i32, ptr %6, i64 %.013.prol
  store i32 %9, ptr %10, align 4, !tbaa !8
  %11 = add nuw i64 %.013.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol, !llvm.loop !10

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader16
  %.013.unr = phi i64 [ %.013.ph, %.lr.ph.preheader16 ], [ %11, %.lr.ph.prol ]
  %12 = sub i64 %.013.ph, %4
  %13 = icmp ugt i64 %12, -4
  br i1 %13, label %._crit_edge, label %.lr.ph

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %14 = shl i64 %4, 2
  %scevgep = getelementptr i8, ptr %6, i64 %14
  %scevgep14 = getelementptr i8, ptr %0, i64 %4
  %bound0 = icmp ult ptr %6, %scevgep14
  %bound1 = icmp ugt ptr %scevgep, %0
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %.lr.ph.preheader16, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %4, -8
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %15 = getelementptr inbounds i8, ptr %0, i64 %index
  %16 = getelementptr inbounds i8, ptr %15, i64 4
  %wide.load = load <4 x i8>, ptr %15, align 1, !tbaa !5, !alias.scope !12
  %wide.load15 = load <4 x i8>, ptr %16, align 1, !tbaa !5, !alias.scope !12
  %17 = sext <4 x i8> %wide.load to <4 x i32>
  %18 = sext <4 x i8> %wide.load15 to <4 x i32>
  %19 = getelementptr inbounds i32, ptr %6, i64 %index
  %20 = getelementptr inbounds i8, ptr %19, i64 16
  store <4 x i32> %17, ptr %19, align 4, !tbaa !8, !alias.scope !15, !noalias !12
  store <4 x i32> %18, ptr %20, align 4, !tbaa !8, !alias.scope !15, !noalias !12
  %index.next = add nuw i64 %index, 8
  %21 = icmp eq i64 %index.next, %n.vec
  br i1 %21, label %middle.block, label %vector.body, !llvm.loop !17

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %4, %n.vec
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader16

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %3
  store ptr %6, ptr %1, align 8, !tbaa !21
  store i64 %4, ptr %2, align 8, !tbaa !23
  ret void

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %.013 = phi i64 [ %41, %.lr.ph ], [ %.013.unr, %.lr.ph.prol.loopexit ]
  %22 = getelementptr inbounds i8, ptr %0, i64 %.013
  %23 = load i8, ptr %22, align 1, !tbaa !5
  %24 = sext i8 %23 to i32
  %25 = getelementptr inbounds i32, ptr %6, i64 %.013
  store i32 %24, ptr %25, align 4, !tbaa !8
  %26 = add nuw i64 %.013, 1
  %27 = getelementptr inbounds i8, ptr %0, i64 %26
  %28 = load i8, ptr %27, align 1, !tbaa !5
  %29 = sext i8 %28 to i32
  %30 = getelementptr inbounds i32, ptr %6, i64 %26
  store i32 %29, ptr %30, align 4, !tbaa !8
  %31 = add nuw i64 %.013, 2
  %32 = getelementptr inbounds i8, ptr %0, i64 %31
  %33 = load i8, ptr %32, align 1, !tbaa !5
  %34 = sext i8 %33 to i32
  %35 = getelementptr inbounds i32, ptr %6, i64 %31
  store i32 %34, ptr %35, align 4, !tbaa !8
  %36 = add nuw i64 %.013, 3
  %37 = getelementptr inbounds i8, ptr %0, i64 %36
  %38 = load i8, ptr %37, align 1, !tbaa !5
  %39 = sext i8 %38 to i32
  %40 = getelementptr inbounds i32, ptr %6, i64 %36
  store i32 %39, ptr %40, align 4, !tbaa !8
  %41 = add nuw i64 %.013, 4
  %exitcond.not.3 = icmp eq i64 %41, %4
  br i1 %exitcond.not.3, label %._crit_edge, label %.lr.ph, !llvm.loop !25
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #2

attributes #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 = { 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 nofree nounwind willreturn memory(argmem: read) "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 willreturn memory(read) }
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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.unroll.disable"}
!12 = !{!13}
!13 = distinct !{!13, !14}
!14 = distinct !{!14, !"LVerDomain"}
!15 = !{!16}
!16 = distinct !{!16, !14}
!17 = distinct !{!17, !18, !19, !20}
!18 = !{!"llvm.loop.mustprogress"}
!19 = !{!"llvm.loop.isvectorized", i32 1}
!20 = !{!"llvm.loop.unroll.runtime.disable"}
!21 = !{!22, !22, i64 0}
!22 = !{!"any pointer", !6, i64 0}
!23 = !{!24, !24, i64 0}
!24 = !{!"long", !6, i64 0}
!25 = distinct !{!25, !18, !19}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass