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common: disabling #pragma omp simd on windows debug builds #2834

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Mar 11, 2025
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common: disabling #pragma omp simd on windows debug builds #2834

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11 changes: 8 additions & 3 deletions src/common/dnnl_thread.hpp
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Original file line number Diff line number Diff line change
@@ -184,13 +184,18 @@ inline int dnnl_get_current_num_threads() {
#define OMP_GET_NUM_THREADS() 1
#endif

// MSVC still supports omp 2.0 only
#if defined(_MSC_VER) && !defined(__clang__) && !defined(__INTEL_COMPILER)
// Disabling OMP SIMD feature in the following scenarios:
// * For MSVC as it only supports OpenMP 2.0
// * In debug mode on Windows to avoid incorrect code generation
// by Intel(R) oneAPI DPC++/C++ Compiler
#if defined(_MSC_VER) \
&& ((!defined(__clang__) && !defined(__INTEL_COMPILER)) \
|| defined(_DEBUG))
#define collapse(x)
#define PRAGMA_OMP_SIMD(...)
#else
#define PRAGMA_OMP_SIMD(...) PRAGMA_MACRO(CHAIN2(omp, simd __VA_ARGS__))
#endif // defined(_MSC_VER) && !defined(__clang__) && !defined(__INTEL_COMPILER)
#endif // defined(_MSC_VER) && ((!defined(__clang__) && !defined(__INTEL_COMPILER)) || defined(_DEBUG))

namespace dnnl {
namespace impl {