a86d5eca6a
This adds flow_sensitive_info_storage and uses it in maybe_fold_comparisons_from_match_pd as mentioned in https://gcc.gnu.org/pipermail/gcc-patches/2023-June/621817.html . Since using it in maybe_fold_comparisons_from_match_pd was easy and allowed me to test the storage earlier, I did it. This also hides better how the flow sensitive information is stored and only a single place needs to be updated if that ever changes (again). OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions. gcc/ChangeLog: * gimple-fold.cc (fosa_unwind): Replace `vrange_storage *` with flow_sensitive_info_storage. (follow_outer_ssa_edges): Update how to save off the flow sensitive info. (maybe_fold_comparisons_from_match_pd): Update restoring of flow sensitive info. * tree-ssanames.cc (flow_sensitive_info_storage::save): New method. (flow_sensitive_info_storage::restore): New method. (flow_sensitive_info_storage::save_and_clear): New method. (flow_sensitive_info_storage::clear_storage): New method. * tree-ssanames.h (class flow_sensitive_info_storage): New class. |
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