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This makes get_expr_value_id cheap and completes the constant value-id simplification by turning the constant_value_expressions into a direct map instead of a set of pre_exprs for the value. 2020-11-10 Richard Biener <rguenther@suse.de> * tree-ssa-pre.c (pre_expr_d::value_id): Add. (constant_value_expressions): Turn into an array of pre_expr. (get_or_alloc_expr_for_nary): New function. (get_or_alloc_expr_for_reference): Likewise. (add_to_value): For constant values only ever add a single CONSTANT. (get_expr_value_id): Return the new value_id member. (vn_valnum_from_value_id): Split out and simplify constant value id handling. (get_or_alloc_expr_for_constant): Set the value_id member. (phi_translate_1): Use get_or_alloc_expr_for_*. (compute_avail): Likewise. (bitmap_find_leader): Simplify constant value id handling.
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