https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109609
--- Comment #19 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:2c7e89510fe41265b285e886d19f9895adf545e8 commit r12-9474-g2c7e89510fe41265b285e886d19f9895adf545e8 Author: Richard Biener <rguent...@suse.de> Date: Tue Apr 25 14:56:44 2023 +0200 tree-optimization/109609 - correctly interpret arg size in fnspec By majority vote and a hint from the API name which is arg_max_access_size_given_by_arg_p this interprets a memory access size specified as given as other argument such as for strncpy in the testcase which has "1cO313" as specifying the _maximum_ size read/written rather than the exact size. There are two uses interpreting it that way already and one differing. The following adjusts the differing and clarifies the documentation. PR tree-optimization/109609 * attr-fnspec.h (arg_max_access_size_given_by_arg_p): Clarify semantics. * tree-ssa-alias.cc (check_fnspec): Correctly interpret the size given by arg_max_access_size_given_by_arg_p as maximum, not exact, size. * gcc.dg/torture/pr109609.c: New testcase. (cherry picked from commit e8d00353017f895d03a9eabae3506fd126ce1a2d)
