ira.c combine_and_move_insns, and ordering of functions

ira.c combine_and_move_insns, and ordering of functions

Notes added by add_store_equivs are not used directly or indirectly by
combine_and_move_insns.  add_store_equivs can therefore run later
without affecting the output of combine_and_move_insns, and thus
add_store_equivs need not take into account potentially moved insns.
Since not all potentially combined/moved insns are in fact combined or
moved, this may allow add_store_equivs to add more REG_EQUIV notes.

grow_reg_equivs isn't needed until the reload reg_equivs array is
changed.

	ira.c (combine_and_move_insns): Move invariant conditions..
	(ira.c): ..to here.  Call combine_and_move_insns before
	add_store_equivs.  Call grow_reg_equivs later.  Allocate
	req_equiv later using max_reg_num() rather than global max_regno.
	(contains_replace_regs): Delete.
	(add_store_equivs): Remove contains_replace_regs test.

From-SVN: r235659