https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106722
--- Comment #4 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:baa3ffb19c54fa334ac2884f6acb5d31aa79ac32 commit r13-2155-gbaa3ffb19c54fa334ac2884f6acb5d31aa79ac32 Author: Richard Biener <rguent...@suse.de> Date: Tue Aug 23 13:58:31 2022 +0200 tree-optimization/106722 - uninit analysis with long def -> use path The following applies similar measures as r13-2133-ge66cf626c72d58 to the computation of the use predicate when the path from PHI def to use is too long and we run into compute_control_dep_chain limits. It also moves the preprocessor define limits internal. This resolves the reduced testcase but not the original one. PR tree-optimization/106722 * gimple-predicate-analysis.h (MAX_NUM_CHAINS, MAX_CHAIN_LEN, MAX_POSTDOM_CHECK, MAX_SWITCH_CASES): Move ... * gimple-predicate-analysis.cc: ... here and document. (simple_control_dep_chain): New function, factored from predicate::use_cannot_happen. (predicate::use_cannot_happen): Adjust. (predicate::predicate): Use simple_control_dep_chain as fallback. * g++.dg/uninit-pr106722-1.C: New testcase.
