; LLVM IR from 0intro/wmii :: lib/libutf (utflen)

; 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
define dso_local i32 @utflen(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i64 0, ptr %4, align 8, !tbaa !9
  br label %6

6:                                                ; preds = %27, %1
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = load i8, ptr %7, align 1, !tbaa !11
  %9 = zext i8 %8 to i32
  store i32 %9, ptr %3, align 4, !tbaa !12
  %10 = load i32, ptr %3, align 4, !tbaa !12
  %11 = icmp slt i32 %10, 128
  br i1 %11, label %12, label %21

12:                                               ; preds = %6
  %13 = load i32, ptr %3, align 4, !tbaa !12
  %14 = icmp eq i32 %13, 0
  br i1 %14, label %15, label %18

15:                                               ; preds = %12
  %16 = load i64, ptr %4, align 8, !tbaa !9
  %17 = trunc i64 %16 to i32
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret i32 %17

18:                                               ; preds = %12
  %19 = load ptr, ptr %2, align 8, !tbaa !5
  %20 = getelementptr inbounds i8, ptr %19, i32 1
  store ptr %20, ptr %2, align 8, !tbaa !5
  br label %27

21:                                               ; preds = %6
  %22 = load ptr, ptr %2, align 8, !tbaa !5
  %23 = call i32 @chartorune(ptr noundef %5, ptr noundef %22)
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = sext i32 %23 to i64
  %26 = getelementptr inbounds i8, ptr %24, i64 %25
  store ptr %26, ptr %2, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %21, %18
  %28 = load i64, ptr %4, align 8, !tbaa !9
  %29 = add nsw i64 %28, 1
  store i64 %29, ptr %4, align 8, !tbaa !9
  br label %6
}

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

declare i32 @chartorune(ptr noundef, ptr noundef) #2

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

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 = { "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/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}


; 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
define dso_local i32 @utflen(ptr noundef %0) local_unnamed_addr #0 {
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  br label %3

3:                                                ; preds = %12, %1
  %.07 = phi ptr [ %0, %1 ], [ %13, %12 ]
  %.0 = phi i32 [ 0, %1 ], [ %14, %12 ]
  %4 = load i8, ptr %.07, align 1, !tbaa !5
  %5 = icmp sgt i8 %4, -1
  br i1 %5, label %6, label %9

6:                                                ; preds = %3
  %7 = icmp eq i8 %4, 0
  br i1 %7, label %8, label %12

8:                                                ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  ret i32 %.0

9:                                                ; preds = %3
  %10 = call i32 @chartorune(ptr noundef nonnull %2, ptr noundef nonnull %.07) #3
  %11 = sext i32 %10 to i64
  br label %12

12:                                               ; preds = %6, %9
  %.sink = phi i64 [ %11, %9 ], [ 1, %6 ]
  %13 = getelementptr inbounds i8, ptr %.07, i64 %.sink
  %14 = add i32 %.0, 1
  br label %3
}

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

declare i32 @chartorune(ptr noundef, ptr noundef) local_unnamed_addr #2

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

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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/C++ TBAA"}


; Effective O3 passes: AggressiveInstCombinePass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,SROAPass,SimplifyCFGPass