; LLVM IR from kala13x/libxutils :: src/data (str)

; 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"

%struct.__va_list_tag = type { i32, i32, ptr, ptr }

; 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
declare void @llvm.va_end.p0(ptr) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @xstrncpyarg(ptr noundef, i64 noundef, ptr noundef, ptr noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.va_start.p0(ptr) #1

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

; Function Attrs: nounwind uwtable
define dso_local i64 @xstrncat(ptr noundef %0, i64 noundef %1, ptr noundef %2, ...) #2 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  %10 = alloca i64, align 8
  %11 = alloca ptr, align 8
  %12 = alloca i32, align 4
  %13 = alloca [1 x %struct.__va_list_tag], align 16
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = icmp eq ptr %14, null
  br i1 %15, label %19, label %16

16:                                               ; preds = %3
  %17 = load i64, ptr %6, align 8, !tbaa !9
  %18 = icmp ne i64 %17, 0
  br i1 %18, label %20, label %19

19:                                               ; preds = %16, %3
  store i64 0, ptr %4, align 8
  br label %46

20:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = load i64, ptr %6, align 8, !tbaa !9
  %23 = sub i64 %22, 1
  %24 = call i64 @strnlen(ptr noundef %21, i64 noundef %23) #5
  store i64 %24, ptr %8, align 8, !tbaa !9
  %25 = load i64, ptr %6, align 8, !tbaa !9
  %26 = load i64, ptr %8, align 8, !tbaa !9
  %27 = icmp ule i64 %25, %26
  br i1 %27, label %28, label %29

28:                                               ; preds = %20
  store i64 0, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %45

29:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %30 = load i64, ptr %6, align 8, !tbaa !9
  %31 = load i64, ptr %8, align 8, !tbaa !9
  %32 = sub i64 %30, %31
  store i64 %32, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #4
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = load i64, ptr %8, align 8, !tbaa !9
  %35 = getelementptr inbounds i8, ptr %33, i64 %34
  store ptr %35, ptr %11, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #4
  store i32 0, ptr %12, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 24, ptr %13) #4
  %36 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %13, i64 0, i64 0
  call void @llvm.va_start.p0(ptr %36)
  %37 = load ptr, ptr %11, align 8, !tbaa !5
  %38 = load i64, ptr %10, align 8, !tbaa !9
  %39 = load ptr, ptr %7, align 8, !tbaa !5
  %40 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %13, i64 0, i64 0
  %41 = call i32 @xstrncpyarg(ptr noundef %37, i64 noundef %38, ptr noundef %39, ptr noundef %40)
  store i32 %41, ptr %12, align 4, !tbaa !11
  %42 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %13, i64 0, i64 0
  call void @llvm.va_end.p0(ptr %42)
  %43 = load i32, ptr %12, align 4, !tbaa !11
  %44 = sext i32 %43 to i64
  store i64 %44, ptr %4, align 8
  store i32 1, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 24, ptr %13) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  br label %45

45:                                               ; preds = %29, %28
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  br label %46

46:                                               ; preds = %45, %19
  %47 = load i64, ptr %4, align 8
  ret i64 %47
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind willreturn }
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 = !{!12, !12, i64 0}
!12 = !{!"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"

%struct.__va_list_tag = type { i32, i32, ptr, ptr }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.va_end.p0(ptr) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @xstrncpyarg(ptr noundef, i64 noundef, ptr noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.va_start.p0(ptr) #1

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strnlen(ptr nocapture noundef, i64 noundef) local_unnamed_addr #3

; Function Attrs: nounwind uwtable
define dso_local range(i64 -2147483648, 2147483648) i64 @xstrncat(ptr noundef %0, i64 noundef %1, ptr noundef %2, ...) local_unnamed_addr #2 {
  %4 = alloca [1 x %struct.__va_list_tag], align 16
  %5 = icmp ne ptr %0, null
  %6 = icmp ne i64 %1, 0
  %or.cond = and i1 %5, %6
  br i1 %or.cond, label %7, label %15

7:                                                ; preds = %3
  %8 = add i64 %1, -1
  %9 = tail call i64 @strnlen(ptr noundef nonnull %0, i64 noundef %8) #4
  %.not = icmp ult i64 %9, %1
  br i1 %.not, label %10, label %15

10:                                               ; preds = %7
  %11 = sub i64 %1, %9
  %12 = getelementptr inbounds i8, ptr %0, i64 %9
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %4) #5
  call void @llvm.va_start.p0(ptr nonnull %4)
  %13 = call i32 @xstrncpyarg(ptr noundef nonnull %12, i64 noundef %11, ptr noundef %2, ptr noundef nonnull %4)
  call void @llvm.va_end.p0(ptr nonnull %4)
  %14 = sext i32 %13 to i64
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %4) #5
  br label %15

15:                                               ; preds = %10, %7, %3
  %.1 = phi i64 [ 0, %3 ], [ %14, %10 ], [ 0, %7 ]
  ret i64 %.1
}

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


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass