diff options
Diffstat (limited to 'gcc/tree-ssa-pre.c')
| -rw-r--r-- | gcc/tree-ssa-pre.c | 36 |
1 files changed, 22 insertions, 14 deletions
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index 11640a8..96ca5ed 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -1996,8 +1996,7 @@ vro_valid_in_sets (bitmap_set_t set1, bitmap_set_t set2, ONLY SET2 CAN BE NULL. This means that we have a leader for each part of the expression (if it consists of values), or the expression is an SSA_NAME. - For loads/calls, we also see if the vuse is killed in this block. -*/ + For loads/calls, we also see if the vuse is killed in this block. */ static bool valid_in_sets (bitmap_set_t set1, bitmap_set_t set2, pre_expr expr, @@ -3625,11 +3624,7 @@ insert (void) } -/* Add OP to EXP_GEN (block), and possibly to the maximal set if it is - not defined by a phi node. - PHI nodes can't go in the maximal sets because they are not in - TMP_GEN, so it is possible to get into non-monotonic situations - during ANTIC calculation, because it will *add* bits. */ +/* Add OP to EXP_GEN (block), and possibly to the maximal set. */ static void add_to_exp_gen (basic_block block, tree op) @@ -3641,9 +3636,7 @@ add_to_exp_gen (basic_block block, tree op) return; result = get_or_alloc_expr_for_name (op); bitmap_value_insert_into_set (EXP_GEN (block), result); - if (TREE_CODE (op) != SSA_NAME - || gimple_code (SSA_NAME_DEF_STMT (op)) != GIMPLE_PHI) - bitmap_value_insert_into_set (maximal_set, result); + bitmap_value_insert_into_set (maximal_set, result); } } @@ -3662,6 +3655,20 @@ make_values_for_phi (gimple phi, basic_block block) add_to_value (get_expr_value_id (e), e); bitmap_insert_into_set (PHI_GEN (block), e); bitmap_value_insert_into_set (AVAIL_OUT (block), e); + if (!in_fre) + { + unsigned i; + for (i = 0; i < gimple_phi_num_args (phi); ++i) + { + tree arg = gimple_phi_arg_def (phi, i); + if (TREE_CODE (arg) == SSA_NAME) + { + e = get_or_alloc_expr_for_name (arg); + add_to_value (get_expr_value_id (e), e); + bitmap_value_insert_into_set (maximal_set, e); + } + } + } } } @@ -4509,11 +4516,12 @@ execute_pre (bool do_fre ATTRIBUTE_UNUSED) FOR_ALL_BB (bb) { print_bitmap_set (dump_file, EXP_GEN (bb), "exp_gen", bb->index); - print_bitmap_set (dump_file, TMP_GEN (bb), "tmp_gen", - bb->index); - print_bitmap_set (dump_file, AVAIL_OUT (bb), "avail_out", - bb->index); + print_bitmap_set (dump_file, PHI_GEN (bb), "phi_gen", bb->index); + print_bitmap_set (dump_file, TMP_GEN (bb), "tmp_gen", bb->index); + print_bitmap_set (dump_file, AVAIL_OUT (bb), "avail_out", bb->index); } + + print_bitmap_set (dump_file, maximal_set, "maximal", 0); } /* Insert can get quite slow on an incredibly large number of basic |