; LLVM IR from AngoraFuzzer/Angora :: llvm_mode/dfsan_rt/dfsan/dfsan_custom.ll/_dfsw_ (strndup)

; 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: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #3

; Function Attrs: mustprogress uwtable
define dso_local ptr @__dfsw___strndup(ptr noundef %0, i64 noundef %1, i32 noundef %2, i32 noundef %3, ptr noundef %4) #2 {
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca i64, align 8
  %12 = alloca ptr, align 8
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i64 %1, ptr %7, align 8, !tbaa !9
  store i32 %2, ptr %8, align 4, !tbaa !11
  store i32 %3, ptr %9, align 4, !tbaa !11
  store ptr %4, ptr %10, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #4
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = call i64 @strlen(ptr noundef %13) #5
  store i64 %14, ptr %11, align 8, !tbaa !9
  %15 = load i64, ptr %11, align 8, !tbaa !9
  %16 = load i64, ptr %7, align 8, !tbaa !9
  %17 = icmp ugt i64 %15, %16
  br i1 %17, label %18, label %20

18:                                               ; preds = %5
  %19 = load i64, ptr %7, align 8, !tbaa !9
  store i64 %19, ptr %11, align 8, !tbaa !9
  br label %20

20:                                               ; preds = %18, %5
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #4
  %21 = load i64, ptr %11, align 8, !tbaa !9
  %22 = add i64 %21, 1
  %23 = call noalias ptr @malloc(i64 noundef %22) #6
  store ptr %23, ptr %12, align 8, !tbaa !5
  %24 = load ptr, ptr %12, align 8, !tbaa !5
  %25 = load ptr, ptr %6, align 8, !tbaa !5
  %26 = load i64, ptr %11, align 8, !tbaa !9
  %27 = call noundef ptr @_ZL12dfsan_memcpyPvPKvm(ptr noundef %24, ptr noundef %25, i64 noundef %26)
  %28 = load ptr, ptr %12, align 8, !tbaa !5
  %29 = load i64, ptr %11, align 8, !tbaa !9
  %30 = getelementptr inbounds i8, ptr %28, i64 %29
  store i8 0, ptr %30, align 1, !tbaa !13
  %31 = load ptr, ptr %10, align 8, !tbaa !5
  store i32 0, ptr %31, align 4, !tbaa !11
  %32 = load ptr, ptr %12, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #4
  ret ptr %32
}

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 allocsize(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 }
attributes #5 = { nounwind willreturn memory(read) }
attributes #6 = { nounwind allocsize(0) }

!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}
!13 = !{!7, !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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @__dfsw___strndup(ptr noundef %0, i64 noundef %1, i32 noundef %2, i32 noundef %3, ptr nocapture noundef writeonly %4) local_unnamed_addr #1 {
  %6 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0) #4
  %spec.select = tail call i64 @llvm.umin.i64(i64 %6, i64 %1)
  %7 = add i64 %spec.select, 1
  %8 = tail call noalias ptr @malloc(i64 noundef %7) #5
  %9 = tail call noundef ptr @_ZL12dfsan_memcpyPvPKvm(ptr noundef %8, ptr noundef %0, i64 noundef %spec.select)
  %10 = getelementptr inbounds i8, ptr %8, i64 %spec.select
  store i8 0, ptr %10, align 1, !tbaa !5
  store i32 0, ptr %4, align 4, !tbaa !8
  ret ptr %8
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umin.i64(i64, i64) #3

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 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { nounwind willreturn memory(read) }
attributes #5 = { nounwind allocsize(0) }

!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++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !6, i64 0}


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