DPCT1088

Intel® DPC++ Compatibility Tool Developer Guide and Reference

Download PDF

ID 768918

Date 12/16/2022

Version

Public

A newer version of this document is available. Customers should click here to go to the newest version.

Visible to Intel only — GUID: GUID-CCDCCD2E-EF76-4259-8085-CE9A6F366EA4

View Details

DPCT1088

Message

The macro definition has multiple migration results in the dimension of free queries function that could not be unified. You may need to modify the code.

Detailed Help

The Intel® DPC++ Compatibility Tool was unable to migrate the code correctly. You need to modify the code manually.

For example, this original code:

// original code:

#define TB(x) cg::thread_block x = cg::this_thread_block()

__global__ void kernel1() {
  int id = threadIdx.x;
  TB(a);
}
__global__ void kernel3() {
  int id = threadIdx.z;
  TB(b);
}

migrated with options --assume-nd-range-dim=1 and --use-experimental-features=free-function-queries, results in the following migrated DPC++ code:

#define TB(x) auto x = sycl::this_group< Placeholder /* Fix the dimension manually */>()
// It should be this_group<1>() when used in kernel1 and this_group<3>() when used in kernel3

void kernel1() {
  int id = sycl::this_nd_item<1>().get_local_id(0);
  TB(a);
}
void kernel3() {
  int id = sycl::this_nd_item<3>().get_local_id(0);
  TB(b);
}

which is manually adjusted to:

// fixed DPC++ code:

#define TB(x, dimensions) auto x = sycl::this_group< dimensions >()

void kernel1() {
  int id = sycl::this_nd_item<1>().get_local_id(0);
  TB(a, 1);
}
void kernel3() {
  int id = sycl::this_nd_item<3>().get_local_id(0);
  TB(b, 3);
}

Suggestions to Fix

Rewrite the code manually.

Select Your Language

Using Intel.com Search

Quick Links

Recent Searches

Advanced Search

Only search in

Intel® DPC++ Compatibility Tool Developer Guide and Reference

DPCT1088

Message

Detailed Help

Suggestions to Fix