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* cse.c (constant_pool_entries_regcost): New global variable to hold the register cost component of constant_pool_entries_cost. (fold_rtx): Calculate constant_pool_entries_regcost at the same time as constant_pool_entries_cost. (cse_insn): Set both src_folded_cost and src_folded_regcost from constant_pool_entries_cost and constant_pool_entries_regcost. (cse_main): Initialize constant_pool_entries_regcost to zero. * optabs.c (expand_unop): Attach a REG_EQUAL note describing the semantics of the sequence of bit operations used to negate a floating-point value. (expand_abs_nojump): Likewise attach a REG_EQUAL note describing the semantics of the bit operations used to abs a floating point value. From-SVN: r72326
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