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* basic-block.h (XMALLOC_REG_SET, XFREE_REG_SET): New. (struct basic_block_def): Remove local_set and cond_local_set fields. Update comment for global_live_at_start. * flow.c (calculate_global_regs_live): Allocate local_sets and cond_local_sets here as arrays of bitmaps previously stored in bb->local_set and bb->cond_local_set. Use xmalloc instead of obstack allocated bitmaps. From-SVN: r90390
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