diff options
Diffstat (limited to 'gcc/tree-ssa-ter.c')
| -rw-r--r-- | gcc/tree-ssa-ter.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/gcc/tree-ssa-ter.c b/gcc/tree-ssa-ter.c index dbfa37c..3375a27 100644 --- a/gcc/tree-ssa-ter.c +++ b/gcc/tree-ssa-ter.c @@ -172,6 +172,9 @@ typedef struct temp_expr_table_d /* Used to indicate a dependency on VDEFs. */ #define VIRTUAL_PARTITION(table) (table->virtual_partition) +/* A place for the many, many bitmaps we create. */ +static bitmap_obstack ter_bitmap_obstack; + #ifdef ENABLE_CHECKING extern void debug_ter (FILE *, temp_expr_table_p); #endif @@ -192,10 +195,10 @@ new_temp_expr_table (var_map map) t->expr_decl_uids = XCNEWVEC (bitmap, num_ssa_names + 1); t->kill_list = XCNEWVEC (bitmap, num_var_partitions (map) + 1); - t->partition_in_use = BITMAP_ALLOC (NULL); + t->partition_in_use = BITMAP_ALLOC (&ter_bitmap_obstack); t->virtual_partition = num_var_partitions (map); - t->new_replaceable_dependencies = BITMAP_ALLOC (NULL); + t->new_replaceable_dependencies = BITMAP_ALLOC (&ter_bitmap_obstack); t->replaceable_expressions = NULL; t->num_in_part = XCNEWVEC (int, num_var_partitions (map)); @@ -269,7 +272,7 @@ static inline void make_dependent_on_partition (temp_expr_table_p tab, int version, int p) { if (!tab->partition_dependencies[version]) - tab->partition_dependencies[version] = BITMAP_ALLOC (NULL); + tab->partition_dependencies[version] = BITMAP_ALLOC (&ter_bitmap_obstack); bitmap_set_bit (tab->partition_dependencies[version], p); } @@ -282,7 +285,7 @@ add_to_partition_kill_list (temp_expr_table_p tab, int p, int ver) { if (!tab->kill_list[p]) { - tab->kill_list[p] = BITMAP_ALLOC (NULL); + tab->kill_list[p] = BITMAP_ALLOC (&ter_bitmap_obstack); bitmap_set_bit (tab->partition_in_use, p); } bitmap_set_bit (tab->kill_list[p], ver); @@ -330,7 +333,8 @@ add_dependence (temp_expr_table_p tab, int version, tree var) /* Rather than set partition_dependencies and in_use lists bit by bit, simply OR in the new_replaceable_dependencies bits. */ if (!tab->partition_dependencies[version]) - tab->partition_dependencies[version] = BITMAP_ALLOC (NULL); + tab->partition_dependencies[version] = + BITMAP_ALLOC (&ter_bitmap_obstack); bitmap_ior_into (tab->partition_dependencies[version], tab->new_replaceable_dependencies); bitmap_ior_into (tab->partition_in_use, @@ -498,7 +502,7 @@ process_replaceable (temp_expr_table_p tab, gimple stmt, int call_cnt) def = SINGLE_SSA_TREE_OPERAND (stmt, SSA_OP_DEF); version = SSA_NAME_VERSION (def); - def_vars = BITMAP_ALLOC (NULL); + def_vars = BITMAP_ALLOC (&ter_bitmap_obstack); basevar = SSA_NAME_VAR (def); if (basevar) @@ -578,7 +582,9 @@ mark_replaceable (temp_expr_table_p tab, tree var, bool more_replacing) finished_with_expr (tab, version, !more_replacing); - /* Set the replaceable expression. */ + /* Set the replaceable expression. + The bitmap for this "escapes" from this file so it's allocated + on the default obstack. */ if (!tab->replaceable_expressions) tab->replaceable_expressions = BITMAP_ALLOC (NULL); bitmap_set_bit (tab->replaceable_expressions, version); @@ -706,21 +712,22 @@ find_replaceable_in_bb (temp_expr_table_p tab, basic_block bb) NULL is returned by the function, otherwise an expression vector indexed by SSA_NAME version numbers. */ -extern bitmap +bitmap find_replaceable_exprs (var_map map) { basic_block bb; temp_expr_table_p table; bitmap ret; + bitmap_obstack_initialize (&ter_bitmap_obstack); table = new_temp_expr_table (map); FOR_EACH_BB (bb) { find_replaceable_in_bb (table, bb); gcc_checking_assert (bitmap_empty_p (table->partition_in_use)); } - ret = free_temp_expr_table (table); + bitmap_obstack_release (&ter_bitmap_obstack); return ret; } |