https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92645
--- Comment #25 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:3ddc18251a821fe69d6229abbf83d77284d2340a commit r11-6644-g3ddc18251a821fe69d6229abbf83d77284d2340a Author: Richard Biener <rguent...@suse.de> Date: Wed Jan 13 12:40:01 2021 +0100 tree-optimization/92645 - improve SLP with existing vectors This improves SLP discovery in the face of existing vectors allowing punning of the vector shape (or even punning from an integer type). For punning from integer types this does not yet handle lane zero extraction being represented as conversion rather than BIT_FIELD_REF. 2021-01-13 Richard Biener <rguent...@suse.de> PR tree-optimization/92645 * tree-vect-slp.c (vect_build_slp_tree_1): Relax supported BIT_FIELD_REF argument. (vect_build_slp_tree_2): Record the desired vector type on the external vector def. (vectorizable_slp_permutation): Handle required punning of existing vector defs. * gcc.target/i386/pr92645-6.c: New testcase.
