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2019-07-29 Richard Biener <rguenther@suse.de> PR tree-optimization/91257 * tree-ssa-sccvn.h (struct vn_avail): New. (struct vn_ssa_aux): Add avail member. * tree-ssa-sccvn.c (class rpo_elim): Remove m_rpo_avail member, add m_avail_freelist one. (rpo_elim::~rpo_elim): Remove. (rpo_elim::eliminate_avail): Adjust to new avail tracking data structure. (rpo_elim::eliminate_push_avail): Likewise. (do_unwind): Likewise. (do_rpo_vn): Likewise. From-SVN: r273877
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