From: Richard Biener Date: Tue, 10 Nov 2015 10:12:13 +0000 (+0000) Subject: tree-vect-data-refs.c (vect_slp_analyze_node_dependences): Handle memory using/clobbe... X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ef785d9f193c035350a2f01223ccd87391226323;p=gcc.git tree-vect-data-refs.c (vect_slp_analyze_node_dependences): Handle memory using/clobbering stmts without a STMT_VINFO_DATA_REF conservatively. 2015-11-10 Richard Biener * tree-vect-data-refs.c (vect_slp_analyze_node_dependences): Handle memory using/clobbering stmts without a STMT_VINFO_DATA_REF conservatively. From-SVN: r230094 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 68163747ca1..9db12db3a75 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2015-11-10 Richard Biener + + * tree-vect-data-refs.c (vect_slp_analyze_node_dependences): + Handle memory using/clobbering stmts without a STMT_VINFO_DATA_REF + conservatively. + 2015-11-10 Richard Biener PR tree-optimization/56118 diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c index 6e323911d93..77313ec4e1a 100644 --- a/gcc/tree-vect-data-refs.c +++ b/gcc/tree-vect-data-refs.c @@ -573,21 +573,22 @@ vect_slp_analyze_node_dependences (slp_instance instance, slp_tree node) gimple *access = SLP_TREE_SCALAR_STMTS (node)[k]; if (access == last_access) continue; - stmt_vec_info access_stmt_info = vinfo_for_stmt (access); - gimple_stmt_iterator gsi = gsi_for_stmt (access); - gsi_next (&gsi); - for (; gsi_stmt (gsi) != last_access; gsi_next (&gsi)) + data_reference *dr_a = STMT_VINFO_DATA_REF (vinfo_for_stmt (access)); + for (gimple_stmt_iterator gsi = gsi_for_stmt (access); + gsi_stmt (gsi) != last_access; gsi_next (&gsi)) { gimple *stmt = gsi_stmt (gsi); - stmt_vec_info stmt_info = vinfo_for_stmt (stmt); - if (!STMT_VINFO_DATA_REF (stmt_info) - || (DR_IS_READ (STMT_VINFO_DATA_REF (stmt_info)) - && DR_IS_READ (STMT_VINFO_DATA_REF (access_stmt_info)))) + if (! gimple_vuse (stmt) + || (DR_IS_READ (dr_a) && ! gimple_vdef (stmt))) continue; - ddr_p ddr = initialize_data_dependence_relation - (STMT_VINFO_DATA_REF (access_stmt_info), - STMT_VINFO_DATA_REF (stmt_info), vNULL); + /* If we couldn't record a (single) data reference for this + stmt we have to give up. */ + data_reference *dr_b = STMT_VINFO_DATA_REF (vinfo_for_stmt (stmt)); + if (!dr_b) + return false; + + ddr_p ddr = initialize_data_dependence_relation (dr_a, dr_b, vNULL); if (vect_slp_analyze_data_ref_dependence (ddr)) { /* ??? If the dependence analysis failed we can resort to the