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If requested, return the vectorization factor appropriate for the offload device, if any. This change gives a significant speedup in the BabelStream "dot" benchmark on amdgcn. The omp_adjust_chunk_size usecase is set "false", for now, but I intend to change that in a follow-up patch. Note that NVPTX SIMT offload does not use this code-path. gcc/ChangeLog: * gimple-loop-versioning.cc (loop_versioning::loop_versioning): Set omp_max_vf to offload == false. * omp-expand.cc (omp_adjust_chunk_size): Likewise. * omp-general.cc (omp_max_vf): Add "offload" parameter, and detect amdgcn offload devices. * omp-general.h (omp_max_vf): Likewise. * omp-low.cc (lower_rec_simd_input_clauses): Pass offload state to omp_max_vf. |
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