--- xnu/xnu-12377.101.15/tests/bounded_ptr_src/arith.subtract_assign.cpp
+++ /dev/null
@@ -1,197 +0,0 @@
-//
-// Tests for
-//  bounded_ptr& operator-=(std::ptrdiff_t n);
-//
-
-#include <libkern/c++/bounded_ptr.h>
-#include <array>
-#include <darwintest.h>
-#include <darwintest_utils.h>
-#include "test_utils.h"
-
-#define _assert(...) T_ASSERT_TRUE((__VA_ARGS__), # __VA_ARGS__)
-
-struct T { int i; };
-
-namespace {
-struct tracking_policy {
-	static bool did_trap;
-	static void
-	trap(char const* msg)
-	{
-		did_trap = true;
-	}
-};
-bool tracking_policy::did_trap = false;
-}
-
-template <typename T, typename QualT>
-static void
-tests()
-{
-	std::array<T, 5> array = {T{0}, T{1}, T{2}, T{3}, T{4}};
-
-	// Subtract-assign positive offsets
-	// T{0}     T{1}     T{2}     T{3}     T{4}     <one-past-last>
-	//   ^                                                ^
-	//   |                                                |
-	// begin                                           end,ptr
-	{
-		test_bounded_ptr<QualT> ptr(array.end(), array.begin(), array.end());
-		auto& ref = ptr -= 0;
-		_assert(&ref == &ptr);
-		_assert(ptr == array.end());
-	}
-	{
-		test_bounded_ptr<QualT> ptr(array.end(), array.begin(), array.end());
-		auto& ref = ptr -= 1;
-		_assert(&ref == &ptr);
-		_assert(&*ptr == &array[4]);
-	}
-	{
-		test_bounded_ptr<QualT> ptr(array.end(), array.begin(), array.end());
-		auto& ref = ptr -= 2;
-		_assert(&ref == &ptr);
-		_assert(&*ptr == &array[3]);
-	}
-	{
-		test_bounded_ptr<QualT> ptr(array.end(), array.begin(), array.end());
-		auto& ref = ptr -= 3;
-		_assert(&ref == &ptr);
-		_assert(&*ptr == &array[2]);
-	}
-	{
-		test_bounded_ptr<QualT> ptr(array.end(), array.begin(), array.end());
-		auto& ref = ptr -= 4;
-		_assert(&ref == &ptr);
-		_assert(&*ptr == &array[1]);
-	}
-	{
-		test_bounded_ptr<QualT> ptr(array.end(), array.begin(), array.end());
-		auto& ref = ptr -= 5;
-		_assert(&ref == &ptr);
-		_assert(&*ptr == &array[0]);
-	}
-
-	// Subtract-assign negative offsets
-	// T{0}     T{1}     T{2}     T{3}     T{4}     <one-past-last>
-	//   ^                                                ^
-	//   |                                                |
-	// begin,ptr                                         end
-	{
-		test_bounded_ptr<QualT> ptr(array.begin(), array.begin(), array.end());
-		auto& ref = ptr -= 0;
-		_assert(&ref == &ptr);
-		_assert(&*ptr == &array[0]);
-	}
-	{
-		test_bounded_ptr<QualT> ptr(array.begin(), array.begin(), array.end());
-		auto& ref = ptr -= -1;
-		_assert(&ref == &ptr);
-		_assert(&*ptr == &array[1]);
-	}
-	{
-		test_bounded_ptr<QualT> ptr(array.begin(), array.begin(), array.end());
-		auto& ref = ptr -= -2;
-		_assert(&ref == &ptr);
-		_assert(&*ptr == &array[2]);
-	}
-	{
-		test_bounded_ptr<QualT> ptr(array.begin(), array.begin(), array.end());
-		auto& ref = ptr -= -3;
-		_assert(&ref == &ptr);
-		_assert(&*ptr == &array[3]);
-	}
-	{
-		test_bounded_ptr<QualT> ptr(array.begin(), array.begin(), array.end());
-		auto& ref = ptr -= -4;
-		_assert(&ref == &ptr);
-		_assert(&*ptr == &array[4]);
-	}
-	{
-		test_bounded_ptr<QualT> ptr(array.begin(), array.begin(), array.end());
-		auto& ref = ptr -= -5;
-		_assert(&ref == &ptr);
-		_assert(ptr == array.end());
-	}
-
-	// Make sure we trap on arithmetic overflow in the number of bytes calculation
-	{
-		std::ptrdiff_t sizeof_T = sizeof(T); // avoid promotion to unsigned in calculations
-
-		// largest (most positive) n for the number of bytes `n * sizeof(T)` not to overflow ptrdiff_t
-		std::ptrdiff_t max_n = std::numeric_limits<std::ptrdiff_t>::max() / sizeof_T;
-
-		// smallest (most negative) n for the number of bytes `n * sizeof(T)` not to overflow ptrdiff_t
-		std::ptrdiff_t min_n = std::numeric_limits<std::ptrdiff_t>::min() / sizeof_T;
-
-		// Overflow with a positive offset
-		{
-			libkern::bounded_ptr<QualT, tracking_policy> ptr(array.begin(), array.begin(), array.end());
-			tracking_policy::did_trap = false;
-			ptr -= max_n + 1;
-			_assert(tracking_policy::did_trap);
-		}
-
-		// Overflow with a negative offset
-		{
-			libkern::bounded_ptr<QualT, tracking_policy> ptr(array.begin(), array.begin(), array.end());
-			tracking_policy::did_trap = false;
-			ptr -= min_n - 1;
-			_assert(tracking_policy::did_trap);
-		}
-	}
-
-	// Make sure we trap on arithmetic overflow in the offset calculation
-	//
-	// To avoid running into the overflow of `n * sizeof(T)` when ptrdiff_t
-	// is the same size as int32_t, we test the offset overflow check by
-	// successive subtraction of smaller offsets.
-	//
-	// We basically push the offset right to its limit, and then push it
-	// past its limit to watch it overflow.
-	{
-		std::int64_t sizeof_T = sizeof(T); // avoid promotion to unsigned in calculations
-
-		// largest (most positive) n for the number of bytes `n * sizeof(T)` not to overflow the int32_t offset
-		std::int64_t max_n = std::numeric_limits<std::int32_t>::max() / sizeof_T;
-
-		// smallest (most negative) n for the number of bytes `n * sizeof(T)` not to overflow the int32_t offset
-		std::int64_t min_n = std::numeric_limits<std::int32_t>::min() / sizeof_T;
-
-		// Subtract positive offsets
-		{
-			libkern::bounded_ptr<QualT, tracking_policy> ptr(array.begin(), array.begin(), array.end());
-			tracking_policy::did_trap = false;
-			ptr -= static_cast<ptrdiff_t>(-min_n / 2);
-			_assert(!tracking_policy::did_trap);
-			ptr -= static_cast<ptrdiff_t>(-min_n / 2);
-			_assert(!tracking_policy::did_trap);
-			ptr -= (-min_n % 2);
-			_assert(!tracking_policy::did_trap); // offset is now right at its negative limit
-			ptr -= 1;
-			_assert(tracking_policy::did_trap);
-		}
-
-		// Subtract negative offsets
-		{
-			libkern::bounded_ptr<QualT, tracking_policy> ptr(array.begin(), array.begin(), array.end());
-			tracking_policy::did_trap = false;
-			ptr -= static_cast<ptrdiff_t>(-max_n / 2);
-			_assert(!tracking_policy::did_trap);
-			ptr -= static_cast<ptrdiff_t>(-max_n / 2);
-			_assert(!tracking_policy::did_trap);
-			ptr -= (-max_n % 2);
-			_assert(!tracking_policy::did_trap); // offset is now right at its positive limit
-			ptr -= -1;
-			_assert(tracking_policy::did_trap);
-		}
-	}
-}
-
-T_DECL(arith_subtract_assign, "bounded_ptr.arith.subtract_assign", T_META_TAG_VM_PREFERRED) {
-	tests<T, T>();
-	tests<T, T const>();
-	tests<T, T volatile>();
-	tests<T, T const volatile>();
-}