vect: Adjust vectorizable_load costing on VMAT_INVARIANT

This patch adjusts the cost handling on VMAT_INVARIANT in
function vectorizable_load.  We don't call function
vect_model_load_cost for it any more.

To make the costing on VMAT_INVARIANT better, this patch is
to query hoist_defs_of_uses for hoisting decision, and add
costs for different "where" based on it.  Currently function
hoist_defs_of_uses would always hoist the defs of all SSA
uses, adding one argument HOIST_P aims to avoid the actual
hoisting during costing phase.

gcc/ChangeLog:

	* tree-vect-stmts.cc (hoist_defs_of_uses): Add one argument HOIST_P.
	(vectorizable_load): Adjust the handling on VMAT_INVARIANT to respect
	hoisting decision and without calling vect_model_load_cost.
	(vect_model_load_cost): Assert it won't get VMAT_INVARIANT any more
	and remove VMAT_INVARIANT related handlings.

0 files changed, 0 insertions, 0 deletions