https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113253
--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by David Malcolm <dmalc...@gcc.gnu.org>: https://gcc.gnu.org/g:cc7aebff74d8967563fd9af5cb958dfcc8c111e8 commit r14-8670-gcc7aebff74d8967563fd9af5cb958dfcc8c111e8 Author: David Malcolm <dmalc...@redhat.com> Date: Wed Jan 31 18:26:26 2024 -0500 analyzer: fix skipping of debug stmts [PR113253] PR analyzer/113253 reports a case where the analyzer output varied with and without -g enabled. The root cause was that debug stmts were in the FOR_EACH_IMM_USE_FAST list for SSA names, leading to the analyzer's state purging logic differing between the -g and non-debugging cases, and thus leading to differences in the exploration of the user's code. Fix by skipping such stmts in the state-purging logic, and removing debug stmts when constructing the supergraph. gcc/analyzer/ChangeLog: PR analyzer/113253 * region-model.cc (region_model::on_stmt_pre): Add gcc_unreachable for debug statements. * state-purge.cc (state_purge_per_ssa_name::state_purge_per_ssa_name): Skip any debug stmts in the FOR_EACH_IMM_USE_FAST list. * supergraph.cc (supergraph::supergraph): Don't add debug stmts to the supernodes. gcc/testsuite/ChangeLog: PR analyzer/113253 * gcc.dg/analyzer/deref-before-check-pr113253.c: New test. Signed-off-by: David Malcolm <dmalc...@redhat.com>
