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gcc/ * tree-if-conv.c: Include hash-map.h. (aggressive_if_conv): New variable. (fold_build_cond_expr): Add simplification of non-zero condition. (add_to_dst_predicate_list): Invoke add_to_predicate_list if edge destination block is not always executed. (if_convertible_phi_p): Fix commentary, allow phi nodes have more than two predecessors if AGGRESSIVE_IF_CONV is true. (if_convertible_stmt_p): Fix commentary. (all_preds_critical_p): New function. (has_pred_critical_p): New function. (if_convertible_bb_p): Fix commentary, if AGGRESSIVE_IF_CONV is true BB can have more than two predecessors and all incoming edges can be critical. (predicate_bbs): Skip predication for loop exit block, use build2_loc to compute predicate for true edge. (find_phi_replacement_condition): Delete this function. (is_cond_scalar_reduction): Add arguments ARG_0, ARG_1 and EXTENDED. Allow interchange PHI arguments if EXTENDED is false. Change check that block containing reduction statement candidate is predecessor of phi-block since phi may have more than two arguments. (phi_args_hash_traits): New helper structure. (struct phi_args_hash_traits): New type. (phi_args_hash_traits::hash): New function. (phi_args_hash_traits::equal_keys): New function. (gen_phi_arg_condition): New function. (predicate_scalar_phi): Add handling of phi nodes with more than two arguments, delete COND and TRUE_BB arguments, insert body of find_phi_replacement_condition to predicate ordinary phi nodes. (predicate_all_scalar_phis): Skip blocks with the only predecessor, delete call of find_phi_replacement_condition and invoke predicate_scalar_phi with two arguments. (insert_gimplified_predicates): Add assert that non-predicated block don't have statements to insert. (ifcvt_split_critical_edges): New function. (ifcvt_split_def_stmt): Likewise. (ifcvt_walk_pattern_tree): Likewise. (stmt_is_root_of_bool_pattern): Likewise. (ifcvt_repair_bool_pattern): Likewise. (ifcvt_local_dce): Likewise. (tree_if_conversion): Add initialization of AGGRESSIVE_IF_CONV which is copy of inner or outer loop force_vectorize field, invoke ifcvt_split_critical_edges, ifcvt_local_dce and ifcvt_repair_bool_pattern for aggressive if-conversion. gcc/testsuite/ * gcc.dg/vect/vect-aggressive-1.c: New. * gcc.target/i386/avx2-vect-aggressive.c: New. From-SVN: r219658
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