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PR rtl-optimization/68730 * lra-remat.c (insn_to_cand_activation): New static variable. (lra_remat): Allocate and free it. (create_cand): New arg activation. Initialize a field in insn_to_cand_activation if it is nonnull. (create_cands): Pass the activation insn to create_cand when making a candidate involving an output reload. Reorganize code a little. (do_remat): Keep track of active status of candidates in a separate bitmap. From-SVN: r233215
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