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IPA-CP transformation summary streaming code currently won't stream out transformations necessary for clones which are only necessary for materialization of other clones (such as an IPA-CP clone which is then cloned again by IPA-SRA). However, a follow-up patch for bettor reconciling IPA-SRA and IPA-CP modifications requires to have that information at its disposal and so this one reworks the streaming to write out all non-empty transformation summaries. In order not to stream transformation summaies into partitions where the node itself nor any of its clones are materialized, I had to make sure that clones also get encode_body flag in the encoder (so that it could be tested) and therefore in turn lto_output understands it needs to skip clones. This should actually mean less streaming in typical case because previously we streamed three zeros for all nodes in a partition with no useful information associated with them. Currently we don't stream anything for those. When reworking the streaming, I also simplified it a little a converted it writing to nicer C++ vector iterations. gcc/ChangeLog: 2022-11-25 Martin Jambor <mjambor@suse.cz> * ipa-prop.cc (useful_ipcp_transformation_info_p): New function. (write_ipcp_transformation_info): Added a parameter, simplified given that is known not to be NULL. (ipcp_write_transformation_summaries): Write out all useful transformation summaries. (read_ipcp_transformation_info): Simplify given that some info will be read. (read_replacements_section): Remove assert. * lto-cgraph.cc (add_node_to): Also set encode_body for clones. * lto-streamer-out.cc (lto_output): Do not output virtual clones.
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