; LLVM IR from marcobambini/gravity :: src/utils (gravity_utils)

; 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

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #1

; Function Attrs: inlinehint nounwind uwtable
declare dso_local i32 @utf8_charbytes(ptr noundef, i32 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @utf8_len(ptr noundef %0, i32 noundef %1) #3 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = icmp eq i32 %10, 0
  br i1 %11, label %12, label %16

12:                                               ; preds = %2
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = call i64 @strlen(ptr noundef %13) #4
  %15 = trunc i64 %14 to i32
  store i32 %15, ptr %5, align 4, !tbaa !9
  br label %16

16:                                               ; preds = %12, %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 0, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %36, %16
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = load i32, ptr %5, align 4, !tbaa !9
  %20 = icmp ult i32 %18, %19
  br i1 %20, label %21, label %37

21:                                               ; preds = %17
  %22 = load i32, ptr %7, align 4, !tbaa !9
  %23 = add i32 %22, 1
  store i32 %23, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #5
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !9
  %26 = call i32 @utf8_charbytes(ptr noundef %24, i32 noundef %25)
  store i32 %26, ptr %8, align 4, !tbaa !9
  %27 = load i32, ptr %8, align 4, !tbaa !9
  %28 = icmp eq i32 %27, 0
  br i1 %28, label %29, label %30

29:                                               ; preds = %21
  store i32 0, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %34

30:                                               ; preds = %21
  %31 = load i32, ptr %8, align 4, !tbaa !9
  %32 = load i32, ptr %6, align 4, !tbaa !9
  %33 = add i32 %32, %31
  store i32 %33, ptr %6, align 4, !tbaa !9
  store i32 0, ptr %9, align 4
  br label %34

34:                                               ; preds = %30, %29
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #5
  %35 = load i32, ptr %9, align 4
  switch i32 %35, label %39 [
    i32 0, label %36
  ]

36:                                               ; preds = %34
  br label %17, !llvm.loop !11

37:                                               ; preds = %17
  %38 = load i32, ptr %7, align 4, !tbaa !9
  store i32 %38, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %39

39:                                               ; preds = %37, %34
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  %40 = load i32, ptr %3, align 4
  ret i32 %40
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { inlinehint 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 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 #4 = { nounwind willreturn memory(read) }
attributes #5 = { 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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: inlinehint nounwind uwtable
declare dso_local i32 @utf8_charbytes(ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @utf8_len(ptr noundef %0, i32 noundef %1) local_unnamed_addr #2 {
  %3 = icmp eq i32 %1, 0
  br i1 %3, label %4, label %7

4:                                                ; preds = %2
  %5 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0) #3
  %6 = trunc i64 %5 to i32
  br label %7

7:                                                ; preds = %4, %2
  %.016 = phi i32 [ %6, %4 ], [ %1, %2 ]
  br label %8

8:                                                ; preds = %10, %7
  %.014 = phi i32 [ 0, %7 ], [ %13, %10 ]
  %.013 = phi i32 [ 0, %7 ], [ %11, %10 ]
  %9 = icmp ult i32 %.014, %.016
  br i1 %9, label %10, label %14

10:                                               ; preds = %8
  %11 = add i32 %.013, 1
  %12 = tail call i32 @utf8_charbytes(ptr noundef %0, i32 noundef %.014)
  %.not = icmp eq i32 %12, 0
  %13 = add i32 %12, %.014
  br i1 %.not, label %14, label %8, !llvm.loop !5

14:                                               ; preds = %8, %10
  %.2 = phi i32 [ 0, %10 ], [ %.013, %8 ]
  ret i32 %.2
}

attributes #0 = { 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 #1 = { inlinehint 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 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) }

!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: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass