* cse.c (constant_pool_entries_regcost): New global variable to

	* 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.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@72326 138bc75d-0d04-0410-961f-82ee72b054a4