https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94980
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Sandiford <rsand...@gcc.gnu.org>: https://gcc.gnu.org/g:d17a896da1e898928d337596d029f0ece0039d55 commit r11-311-gd17a896da1e898928d337596d029f0ece0039d55 Author: Richard Sandiford <richard.sandif...@arm.com> Date: Tue May 12 09:01:10 2020 +0100 tree: Add vector_element_bits(_tree) [PR94980 1/3] A lot of code that wants to know the number of bits in a vector element gets that information from the element's TYPE_SIZE, which is always equal to TYPE_SIZE_UNIT * BITS_PER_UNIT. This doesn't work for SVE and AVX512-style packed boolean vectors, where several elements can occupy a single byte. This patch introduces a new pair of helpers for getting the true (possibly sub-byte) size. I made a token attempt to convert obvious element size calculations, but I'm sure I missed some. 2020-05-12 Richard Sandiford <richard.sandif...@arm.com> gcc/ PR tree-optimization/94980 * tree.h (vector_element_bits, vector_element_bits_tree): Declare. * tree.c (vector_element_bits, vector_element_bits_tree): New. * match.pd: Use the new functions instead of determining the vector element size directly from TYPE_SIZE(_UNIT). * tree-vect-data-refs.c (vect_gather_scatter_fn_p): Likewise. * tree-vect-patterns.c (vect_recog_mask_conversion_pattern): Likewise. * tree-vect-stmts.c (vect_is_simple_cond): Likewise. * tree-vect-generic.c (expand_vector_piecewise): Likewise. (expand_vector_conversion): Likewise. (expand_vector_addition): Likewise for a TYPE_SIZE_UNIT used as a divisor. Convert the dividend to bits to compensate. * tree-vect-loop.c (vectorizable_live_operation): Call vector_element_bits instead of open-coding it.
