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This FAIL was introduced from r14-6908. The reason is that when merging constant vector permutation implementations, the 128-bit matching situation was not fully considered. In fact, the expansion of 128-bit vectors after merging only supports value-based 4 elements set shuffle, so this time is a complete implementation of the entire 128-bit vector constant permutation, and some structural adjustments have also been made to the code. gcc/ChangeLog: * config/loongarch/loongarch.cc (loongarch_expand_vselect): Adjust. (loongarch_expand_vselect_vconcat): Ditto. (loongarch_try_expand_lsx_vshuf_const): New, use vshuf to implement all 128-bit constant permutation situations. (loongarch_expand_lsx_shuffle): Adjust and rename function name. (loongarch_is_imm_set_shuffle): Renamed function name. (loongarch_expand_vec_perm_even_odd): Function forward declaration. (loongarch_expand_vec_perm_even_odd_1): Add implement for 128-bit extract-even and extract-odd permutations. (loongarch_is_odd_extraction): Delete. (loongarch_is_even_extraction): Ditto. (loongarch_expand_vec_perm_const): Adjust.
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