This patch makes the AArch64 vec_perm_const code use the new vec_perm_indices routines, instead of checking each element individually. This means that they extend naturally to variable-length vectors. Also, aarch64_evpc_dup was the only function that generated rtl when testing_p is true, and that looked accidental. The patch adds the missing check and then replaces the gen_rtx_REG/start_sequence/ end_sequence stuff with an assert that no rtl is generated. 2018-01-09 Richard Sandiford <richard.sandiford@linaro.org> gcc/ * config/aarch64/aarch64.c (aarch64_evpc_trn): Use d.perm.series_p instead of checking each element individually. (aarch64_evpc_uzp): Likewise. (aarch64_evpc_zip): Likewise. (aarch64_evpc_ext): Likewise. (aarch64_evpc_rev): Likewise. (aarch64_evpc_dup): Test the encoding for a single duplicated element, instead of checking each element individually. Return true without generating rtl if (aarch64_vectorize_vec_perm_const): Use all_from_input_p to test whether all selected elements come from the same input, instead of checking each element individually. Remove calls to gen_rtx_REG, start_sequence and end_sequence and instead assert that no rtl is generated. From-SVN: r256385
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