; LLVM IR from AngoraFuzzer/Angora :: llvm_mode/dfsan_rt/dfsan/dfsan_custom.ll_ (dfsw_strncpy)

; 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: mustprogress uwtable
declare hidden noundef ptr @_ZL12dfsan_memcpyPvPKvm(ptr noundef, ptr noundef, i64 noundef) #2

; Function Attrs: mustprogress uwtable
declare hidden void @_ZL12dfsan_memsetPvijm(ptr noundef, i32 noundef, i32 noundef, i64 noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local ptr @__dfsw_strncpy(ptr noundef %0, ptr noundef %1, i64 noundef %2, i32 noundef %3, i32 noundef %4, i32 noundef %5, ptr noundef %6) #2 {
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i64, align 8
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  %14 = alloca ptr, align 8
  %15 = alloca i64, align 8
  store ptr %0, ptr %8, align 8, !tbaa !5
  store ptr %1, ptr %9, align 8, !tbaa !5
  store i64 %2, ptr %10, align 8, !tbaa !9
  store i32 %3, ptr %11, align 4, !tbaa !11
  store i32 %4, ptr %12, align 4, !tbaa !11
  store i32 %5, ptr %13, align 4, !tbaa !11
  store ptr %6, ptr %14, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %15) #3
  %16 = load ptr, ptr %9, align 8, !tbaa !5
  %17 = call i64 @strlen(ptr noundef %16) #4
  store i64 %17, ptr %15, align 8, !tbaa !9
  %18 = load i64, ptr %15, align 8, !tbaa !9
  %19 = load i64, ptr %10, align 8, !tbaa !9
  %20 = icmp ult i64 %18, %19
  br i1 %20, label %21, label %35

21:                                               ; preds = %7
  %22 = load ptr, ptr %8, align 8, !tbaa !5
  %23 = load ptr, ptr %9, align 8, !tbaa !5
  %24 = load i64, ptr %15, align 8, !tbaa !9
  %25 = add i64 %24, 1
  %26 = call noundef ptr @_ZL12dfsan_memcpyPvPKvm(ptr noundef %22, ptr noundef %23, i64 noundef %25)
  %27 = load ptr, ptr %8, align 8, !tbaa !5
  %28 = load i64, ptr %15, align 8, !tbaa !9
  %29 = getelementptr inbounds i8, ptr %27, i64 %28
  %30 = getelementptr inbounds i8, ptr %29, i64 1
  %31 = load i64, ptr %10, align 8, !tbaa !9
  %32 = load i64, ptr %15, align 8, !tbaa !9
  %33 = sub i64 %31, %32
  %34 = sub i64 %33, 1
  call void @_ZL12dfsan_memsetPvijm(ptr noundef %30, i32 noundef 0, i32 noundef 0, i64 noundef %34)
  br label %40

35:                                               ; preds = %7
  %36 = load ptr, ptr %8, align 8, !tbaa !5
  %37 = load ptr, ptr %9, align 8, !tbaa !5
  %38 = load i64, ptr %10, align 8, !tbaa !9
  %39 = call noundef ptr @_ZL12dfsan_memcpyPvPKvm(ptr noundef %36, ptr noundef %37, i64 noundef %38)
  br label %40

40:                                               ; preds = %35, %21
  %41 = load i32, ptr %11, align 4, !tbaa !11
  %42 = load ptr, ptr %14, align 8, !tbaa !5
  store i32 %41, ptr %42, align 4, !tbaa !11
  %43 = load ptr, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %15) #3
  ret ptr %43
}

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 = { mustprogress 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 }
attributes #4 = { 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++ 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"

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare hidden noundef ptr @_ZL12dfsan_memcpyPvPKvm(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare hidden void @_ZL12dfsan_memsetPvijm(ptr noundef, i32 noundef, i32 noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @__dfsw_strncpy(ptr noundef returned %0, ptr noundef %1, i64 noundef %2, i32 noundef %3, i32 noundef %4, i32 noundef %5, ptr nocapture noundef writeonly %6) local_unnamed_addr #1 {
  %8 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %1) #2
  %9 = icmp ult i64 %8, %2
  br i1 %9, label %10, label %17

10:                                               ; preds = %7
  %11 = add nuw i64 %8, 1
  %12 = tail call noundef ptr @_ZL12dfsan_memcpyPvPKvm(ptr noundef %0, ptr noundef %1, i64 noundef %11)
  %13 = getelementptr inbounds i8, ptr %0, i64 %8
  %14 = getelementptr inbounds i8, ptr %13, i64 1
  %15 = xor i64 %8, -1
  %16 = add i64 %15, %2
  tail call void @_ZL12dfsan_memsetPvijm(ptr noundef nonnull %14, i32 noundef 0, i32 noundef 0, i64 noundef %16)
  br label %19

17:                                               ; preds = %7
  %18 = tail call noundef ptr @_ZL12dfsan_memcpyPvPKvm(ptr noundef %0, ptr noundef %1, i64 noundef %2)
  br label %19

19:                                               ; preds = %17, %10
  store i32 %3, ptr %6, align 4, !tbaa !5
  ret ptr %0
}

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 = { mustprogress 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 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass