2012-06-12  Bill Schmidt  <wschmidt@linux.ibm.com>

	* opts.c: Add -fhoist-adjacent-loads to -O2 and above.
	* tree-ssa-phiopt.c (tree_ssa_phiopt_worker): Add argument to forward
	declaration.
	(hoist_adjacent_loads, gate_hoist_loads): New forward declarations.
	(tree_ssa_phiopt): Call gate_hoist_loads.
	(tree_ssa_cs_elim): Add parm to tree_ssa_phiopt_worker call.
	(tree_ssa_phiopt_worker): Add do_hoist_loads to formal arg list; call
	hoist_adjacent_loads.
	(local_mem_dependence): New function.
	(hoist_adjacent_loads): Likewise.
	(gate_hoist_loads): Likewise.
	* common.opt (fhoist-adjacent-loads): New switch.
	* Makefile.in (tree-ssa-phiopt.o): Added dependencies.

From-SVN: r188457