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Delay SLP instance loads gathering

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This delays filling SLP_INSTANCE_LOADS.

2020-11-16  Richard Biener  <rguenther@suse.de>

	* tree-vectorizer.h (vect_gather_slp_loads): Declare.
	* tree-vect-loop.c (vect_analyze_loop_2): Call
	vect_gather_slp_loads.
	* tree-vect-slp.c (vect_build_slp_instance): Do not gather
	SLP loads here.
	(vect_gather_slp_loads): Remove wrapper, new function.
	(vect_slp_analyze_bb_1): Call it.
This commit is contained in:
Richard Biener 2020-11-16 14:26:20 +01:00
parent d1746388db
commit c84df34aec
3 changed files with 22 additions and 8 deletions
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3
gcc/tree-vect-loop.c
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@ -2298,6 +2298,9 @@ vect_analyze_loop_2 (loop_vec_info loop_vinfo, bool &fatal, unsigned *n_stmts)
/* Optimize the SLP graph with the vectorization factor fixed. */
vect_optimize_slp (loop_vinfo);
/* Gather the loads reachable from the SLP graph entries. */
vect_gather_slp_loads (loop_vinfo);
}
bool saved_can_use_partial_vectors_p

26
gcc/tree-vect-slp.c
View File

@ -2071,13 +2071,6 @@ vect_gather_slp_loads (vec<slp_tree> &loads, slp_tree node,
}
}
static void
vect_gather_slp_loads (slp_instance inst, slp_tree node)
{
hash_set<slp_tree> visited;
vect_gather_slp_loads (SLP_INSTANCE_LOADS (inst), node, visited);
}
/* Find the last store in SLP INSTANCE. */
@ -2252,7 +2245,6 @@ vect_build_slp_instance (vec_info *vinfo,
new_instance->cost_vec = vNULL;
new_instance->subgraph_entries = vNULL;
vect_gather_slp_loads (new_instance, node);
if (dump_enabled_p ())
dump_printf_loc (MSG_NOTE, vect_location,
"SLP size %u vs. limit %u.\n",
@ -3071,6 +3063,21 @@ vect_optimize_slp (vec_info *vinfo)
}
}
/* Gather loads reachable from the individual SLP graph entries. */
void
vect_gather_slp_loads (vec_info *vinfo)
{
unsigned i;
slp_instance instance;
FOR_EACH_VEC_ELT (vinfo->slp_instances, i, instance)
{
hash_set<slp_tree> visited;
vect_gather_slp_loads (SLP_INSTANCE_LOADS (instance),
SLP_INSTANCE_TREE (instance), visited);
}
}
/* For each possible SLP instance decide whether to SLP it and calculate overall
unrolling factor needed to SLP the loop. Return TRUE if decided to SLP at
@ -4152,6 +4159,9 @@ vect_slp_analyze_bb_1 (bb_vec_info bb_vinfo, int n_stmts, bool &fatal,
/* Optimize permutations. */
vect_optimize_slp (bb_vinfo);
/* Gather the loads reachable from the SLP graph entries. */
vect_gather_slp_loads (bb_vinfo);
vect_record_base_alignments (bb_vinfo);
/* Analyze and verify the alignment of data references and the

1
gcc/tree-vectorizer.h
View File

@ -1974,6 +1974,7 @@ extern opt_result vect_analyze_slp (vec_info *, unsigned);
extern bool vect_make_slp_decision (loop_vec_info);
extern void vect_detect_hybrid_slp (loop_vec_info);
extern void vect_optimize_slp (vec_info *);
extern void vect_gather_slp_loads (vec_info *);
extern void vect_get_slp_defs (slp_tree, vec<tree> *);
extern void vect_get_slp_defs (vec_info *, slp_tree, vec<vec<tree> > *,
unsigned n = -1U);