From bb0f5ca786de6649e1350b281d289ed4ad871b9e Mon Sep 17 00:00:00 2001 From: Alan Lawrence Date: Fri, 8 Jan 2016 18:02:35 +0000 Subject: [PATCH] Fix PR68707 gcc/: * tree-vect-slp.c (vect_analyze_slp_instance): Cancel permuted SLP instances that can be handled via vect_load_lanes. gcc/testsuite/: * lib/target-supports.exp (check_effective_target_vect_load_lanes): New. * gcc.dg/vect/slp-perm-1.c: Look for vect_load_lanes instead of SLP on platforms supporting it. * gcc.dg/vect/slp-perm-2.c: Likewise. * gcc.dg/vect/slp-perm-3.c: Likewise. * gcc.dg/vect/slp-perm-5.c: Likewise. * gcc.dg/vect/slp-perm-7.c: Likewise. * gcc.dg/vect/slp-perm-8.c: Likewise. * gcc.dg/vect/slp-perm-6.c: Look for vect_load_lanes in addition to SLP on platforms supporting it. Co-Authored-By: Richard Biener From-SVN: r232174 --- gcc/tree-vect-slp.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'gcc/tree-vect-slp.c') diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c index b029f61..0aac2e2 100644 --- a/gcc/tree-vect-slp.c +++ b/gcc/tree-vect-slp.c @@ -1820,6 +1820,36 @@ vect_analyze_slp_instance (vec_info *vinfo, } } + /* If the loads and stores can be handled with load/store-lane + instructions do not generate this SLP instance. */ + if (is_a (vinfo) + && loads_permuted + && dr && vect_store_lanes_supported (vectype, group_size)) + { + slp_tree load_node; + FOR_EACH_VEC_ELT (loads, i, load_node) + { + gimple *first_stmt = GROUP_FIRST_ELEMENT + (vinfo_for_stmt (SLP_TREE_SCALAR_STMTS (load_node)[0])); + stmt_vec_info stmt_vinfo = vinfo_for_stmt (first_stmt); + /* Use SLP for strided accesses (or if we can't load-lanes). */ + if (STMT_VINFO_STRIDED_P (stmt_vinfo) + || ! vect_load_lanes_supported + (STMT_VINFO_VECTYPE (stmt_vinfo), + GROUP_SIZE (stmt_vinfo))) + break; + } + if (i == loads.length ()) + { + if (dump_enabled_p ()) + dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location, + "Built SLP cancelled: can use " + "load/store-lanes\n"); + vect_free_slp_instance (new_instance); + return false; + } + } + vinfo->slp_instances.safe_push (new_instance); if (dump_enabled_p ()) -- cgit v1.1