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dump reason for throwing away SLP instance

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This adds dumping to vect_slp_analyze_node_alignment when it fails
an SLP instance due to shared vector type conflicts.

2020-10-28  Richard Biener  <rguenther@suse.de>

	* tree-vect-data-refs.c (vect_slp_analyze_node_alignment):
	Dump when vect_update_shared_vectype fails.
This commit is contained in:
Richard Biener 2020-10-28 12:59:07 +01:00
parent 72a87d82e0
commit ac1724ccfd
1 changed files with 7 additions and 1 deletions
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8
gcc/tree-vect-data-refs.c
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@ -2428,7 +2428,13 @@ vect_slp_analyze_node_alignment (vec_info *vinfo, slp_tree node)
/* We need to commit to a vector type for the group now. */
if (is_a <bb_vec_info> (vinfo)
&& !vect_update_shared_vectype (first_stmt_info, SLP_TREE_VECTYPE (node)))
return false;
{
if (dump_enabled_p ())
dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
"desired vector type conflicts with earlier one "
"for %G", first_stmt_info->stmt);
return false;
}
dr_vec_info *dr_info = STMT_VINFO_DR_INFO (first_stmt_info);
vect_compute_data_ref_alignment (vinfo, dr_info);