9bbcee450d
In r12-3094-ge82e0f149b0aba I added the assumption that POINTER_PLUS_EXPR of non-NULL is non-NULL (for PR analyzer/101962). Whilst working on another bug, I noticed that this only works when the LHS is known to be non-NULL via region_model::eval_condition_without_cm, but not when it's known through a constraint. This distinction predates the original commit of the analyzer in GCC 10, but I believe it became irrelevant in the GCC 11 rewrite of the region model code (r11-2694-g808f4dfeb3a95f). Hence this patch eliminates region_model::eval_condition_without_cm in favor of all users simply calling region_model::eval_condition. Doing so enables the "POINTER_PLUS_EXPR of non-NULL is non-NULL" assumption to also be made when the LHS is known through a constraint (e.g. a conditional). gcc/analyzer/ChangeLog: PR analyzer/101962 * region-model-impl-calls.cc: Update comment. * region-model.cc (region_model::check_symbolic_bounds): Fix layout of "void" return. Replace usage of eval_condition_without_cm with eval_condition. (region_model::eval_condition): Take over body of... (region_model::eval_condition_without_cm): ...this subroutine, dropping the latter. Eliminating this distinction avoids issues where constraints were not considered when recursing. (region_model::compare_initial_and_pointer): Update comment. (region_model::symbolic_greater_than): Replace usage of eval_condition_without_cm with eval_condition. * region-model.h (region_model::eval_condition_without_cm): Delete decl. gcc/testsuite/ChangeLog: PR analyzer/101962 * gcc.dg/analyzer/data-model-23.c (test_3): New test. Signed-off-by: David Malcolm <dmalcolm@redhat.com> |
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