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authorJan Hubicka <jh@suse.cz>2021-11-16 23:01:28 +0100
committerJan Hubicka <jh@suse.cz>2021-11-16 23:01:28 +0100
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Use modref summaries for byte-wise dead store elimination.
gcc/ChangeLog: * ipa-modref.c (get_modref_function_summary): Declare. * ipa-modref.h (get_modref_function_summary): New function. * tree-ssa-dse.c (clear_live_bytes_for_ref): Break out from ... (clear_bytes_written_by): ... here; also clear memory killed by calls. gcc/testsuite/ChangeLog: * gcc.dg/tree-ssa/modref-dse-4.c: New test.
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