[SYCL] Do not count devices for banned platforms

[uditagarwal97]

Call to Platform.get_devices() increments the device count for the adapter (in Adapter->setLastDeviceId()) and if a platform is banned (like OpenCL for AMD), it can cause incorrect device numbering, when used with ONEAPI_DEVICE_SELECTOR.

This PR skips call to Platform.get_devices() if a platform is banned.

[Copilot]

Pull Request Overview

This PR prevents banned platforms from incrementing device counts by skipping the Platform.get_devices() call, addressing incorrect device numbering when using ONEAPI_DEVICE_SELECTOR.

• Adjusted the end-to-end device numbering test to remove outdated unsupported markers.
• Wrapped the device query in platform_impl::getAdapterPlatforms with a banned‐platform guard.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
sycl/test-e2e/Regression/device_num.cpp	Removed UNSUPPORTED markers for HIP and issue tracking comments.
sycl/source/detail/platform_impl.cpp	Initialized HasAnyDevices to false and only called get_devices() when the platform isn’t banned.

Comments suppressed due to low confidence (2)

sycl/test-e2e/Regression/device_num.cpp:1

• Removing the UNSUPPORTED: any-device-is-hip marker may cause this test to run on HIP platforms where device numbering behavior differs. Consider verifying test behavior on HIP or re-adding an appropriate unsupported directive.

-// UNSUPPORTED: any-device-is-hip

sycl/source/detail/platform_impl.cpp:121

• [nitpick] The comment refers to incrementing the count for the platform, but the side effect occurs on the adapter (Adapter->setLastDeviceId()). Consider updating for accuracy.

// Platform.get_devices() increments the device count for the platform

[Copilot]

[nitpick] Add braces around this if block to improve readability and prevent mistakes if additional statements are added later.

Suggested change

	if (!IsBanned)
	HasAnyDevices = !Platform.get_devices(info::device_type::all).empty();
	if (!IsBanned) {
	HasAnyDevices = !Platform.get_devices(info::device_type::all).empty();
	}