https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109644
--- Comment #2 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:6e6f86f22873aab7059e083fd0c9905bd58e5efa commit r14-324-g6e6f86f22873aab7059e083fd0c9905bd58e5efa Author: Richard Biener <rguent...@suse.de> Date: Mon Apr 24 13:20:25 2023 +0200 tree-optimization/109644 - missing IL checking We fail to verify the constraints under which we allow handled components to wrap registers. The gcc.dg/pr70022.c testcase shows that we happily end up with _2 = VIEW_CONVERT_EXPR<int[4]>(v_1(D)) as produced by SSA rewrite and update_address_taken. But the intent was that we wrap registers with at most a single level of handled components and specifically only allow __real, __imag, BIT_FIELD_REF and VIEW_CONVERT_EXPR on them, but not ARRAY_REF or COMPONENT_REF. The following makes IL verification stricter which catches the problem. PR tree-optimization/109644 * tree-cfg.cc (verify_types_in_gimple_reference): Check register constraints on the outermost VIEW_CONVERT_EXPR only. Do not allow register or invariant bases on multi-level or possibly variable index handled components.
