[SYCL] Deprecate get_access for host_accessor in SYCL2020 (#8005)

Deprecate `buffer::get_access` methods for `host_accessor` in SYCL2020.

Author: maarquitos14

sycl/include/sycl/buffer.hpp

@@ -504,6 +504,8 @@ class buffer : public detail::buffer_plain,
   }
 
   template <access::mode mode>
+  __SYCL2020_DEPRECATED("get_access for host_accessor is deprecated, please "
+                        "use get_host_access instead")
   accessor<T, dimensions, mode, access::target::host_buffer,
            access::placeholder::false_t, ext::oneapi::accessor_property_list<>>
   get_access(
@@ -531,6 +533,8 @@ class buffer : public detail::buffer_plain,
   }
 
   template <access::mode mode>
+  __SYCL2020_DEPRECATED("get_access for host_accessor is deprecated, please "
+                        "use get_host_access instead")
   accessor<T, dimensions, mode, access::target::host_buffer,
            access::placeholder::false_t, ext::oneapi::accessor_property_list<>>
   get_access(

sycl/test/warnings/sycl_2020_deprecations.cpp

@@ -64,6 +64,17 @@ int main() {
   size_t BufferSize = Buffer.size();
   // expected-warning@+1 {{'get_size' is deprecated: get_size() is deprecated, please use byte_size() instead}}
   size_t BufferGetSize = Buffer.get_size();
+  {
+    // expected-warning@+2 {{'get_access' is deprecated: get_access for host_accessor is deprecated, please use get_host_access instead}}
+    // expected-warning@+1 {{'get_access<sycl::access::mode::read_write>' is deprecated: get_access for host_accessor is deprecated, please use get_host_access instead}}
+    auto acc = Buffer.get_access<sycl::access_mode::read_write>();
+  }
+  {
+    // expected-warning@+3 {{'get_access' is deprecated: get_access for host_accessor is deprecated, please use get_host_access instead}}
+    // expected-warning@+2 {{'get_access<sycl::access::mode::read_write>' is deprecated: get_access for host_accessor is deprecated, please use get_host_access instead}}
+    auto acc =
+        Buffer.get_access<sycl::access_mode::read_write>(sycl::range<1>(0));
+  }
 
   sycl::vec<int, 2> Vec(1, 2);
   // expected-warning@+1{{'get_count' is deprecated: get_count() is deprecated, please use size() instead}}