xe: jit: gemm: move catalog generation to its own compilation unit

GCC 11 can take upwards of 15 minutes to compile the gemm catalog. This patch
moves kcatalog generation to its own compilation unit and removes -fvar-tracking
to limit compile times.

Author: rjoursler

Diff for: src/gpu/intel/jit/gemm/CMakeLists.txt

@@ -1,5 +1,5 @@
 #===============================================================================
-# Copyright 2024 Intel Corporation
+# Copyright 2024-2025 Intel Corporation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -68,8 +68,12 @@ set_property(GLOBAL APPEND PROPERTY DNNL_LIB_DEPS
 
 include_directories_with_host_compiler_before(${OBJ_LIB} ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/include ${CMAKE_CURRENT_SOURCE_DIR}/../ngen)
 
-# Workaround for LTO bug in GCC 10, 11, 12 (possibly other versions)
 if(CMAKE_COMPILER_IS_GNUCC)
+    # Workaround for LTO bug in GCC 10, 11, 12 (possibly other versions)
     set_source_files_properties(generator/pieces/loop_sequencer.cpp PROPERTIES COMPILE_FLAGS -fno-lto)
     set_source_files_properties(generator/generator.cpp PROPERTIES COMPILE_FLAGS -fno-lto)
+
+
+    # Workaround for excessively long compile time in GCC 11, 12 (possibly other versions)
+    set_source_files_properties(gen_gemm_kernel_db.cpp PROPERTIES COMPILE_FLAGS -fno-var-tracking)
 endif()

Diff for: src/gpu/intel/jit/gemm/gen_gemm_kernel.cpp

@@ -17,6 +17,7 @@
 #include "gpu/intel/jit/gemm/gen_gemm_kernel.hpp"
 #include "common/impl_registration.hpp"
 #include "gpu/intel/compute/device_info.hpp"
+#include "gpu/intel/jit/gemm/gen_gemm_kernel_db.hpp"
 #include "gpu/intel/jit/gemm/include/generator.hpp"
 #include "gpu/intel/jit/gemm/include/strategy_parser.hpp"
 #include "gpu/intel/jit/utils/ngen_type_bridge.hpp"
@@ -28,11 +29,6 @@ namespace gpu {
 namespace intel {
 namespace jit {
 
-#define _CATALOG_ gemm_catalog
-#include "selector/db/kernel.db"
-;
-#undef _CATALOG_
-
 status_t gen_gemm_kernel_desc_t::create_generator(
         const compute::compute_engine_t &engine,
         compute::kernel_t &kernel) const {
@@ -599,7 +595,7 @@ status_t gen_gemm_nocopy_kernel_desc_t::select_kernel(compute::gpu_arch_t arch,
     eval_params.batch = (batch_dims > 0);
     eval_params.deterministic = (mode & mode_deterministic);
 
-    entry_ = select(gemm_catalog, static_cast<int>(match_params.size()),
+    entry_ = select(catalog(), static_cast<int>(match_params.size()),
             match_params.data(), eval_params, aux_params_);
 
     if (!entry_) return status::unimplemented;
@@ -743,7 +739,7 @@ status_t gen_gemm_xe_systolic_kernel_desc_t::select_kernel(
     eval_params.cConvert = (acc_type != c_type);
     eval_params.batch = (batch_dims > 0);
 
-    entry_ = select(gemm_catalog, match_params, eval_params, aux_params_);
+    entry_ = select(catalog(), match_params, eval_params, aux_params_);
 
     if (!entry_) return status::unimplemented;
 

Diff for: src/gpu/intel/jit/gemm/gen_gemm_kernel_db.cpp

@@ -0,0 +1,38 @@
+/*******************************************************************************
+* Copyright 2025 Intel Corporation
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*******************************************************************************/
+
+#include "gpu/intel/jit/gemm/gen_gemm_kernel_db.hpp"
+
+namespace dnnl {
+namespace impl {
+namespace gpu {
+namespace intel {
+namespace jit {
+
+#define _CATALOG_ gemm_catalog
+#include "selector/db/kernel.db"
+#undef _CATALOG_
+
+const kcatalog::Catalog &catalog() {
+    static const kcatalog::Catalog c = gemm_catalog;
+    return c;
+};
+
+} // namespace jit
+} // namespace intel
+} // namespace gpu
+} // namespace impl
+} // namespace dnnl

Diff for: src/gpu/intel/jit/gemm/gen_gemm_kernel_db.hpp

@@ -0,0 +1,36 @@
+/*******************************************************************************
+* Copyright 2025 Intel Corporation
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*******************************************************************************/
+
+#ifndef GPU_INTEL_JIT_GEMM_GEN_GEMM_KERNEL_DB_HPP
+#define GPU_INTEL_JIT_GEMM_GEN_GEMM_KERNEL_DB_HPP
+
+#include "gpu/intel/jit/gemm/include/kernel_catalog.hpp"
+
+namespace dnnl {
+namespace impl {
+namespace gpu {
+namespace intel {
+namespace jit {
+
+const kcatalog::Catalog &catalog();
+
+}
+} // namespace intel
+} // namespace gpu
+} // namespace impl
+} // namespace dnnl
+
+#endif