2011-08-22 Dimitrios Apostolou <ji...@gmx.net>
* tree-ssa-pre.c (phi_trans_add, init_pre, fini_pre): Added a pool
for phi_translate_table elements to avoid free() calls from
htab_delete().
=== modified file 'gcc/tree-ssa-pre.c'
--- gcc/tree-ssa-pre.c 2011-05-04 09:04:53 +0000
+++ gcc/tree-ssa-pre.c 2011-08-17 08:43:23 +0000
@@ -515,6 +515,10 @@ typedef struct expr_pred_trans_d
} *expr_pred_trans_t;
typedef const struct expr_pred_trans_d *const_expr_pred_trans_t;
+/* Pool of memory for the above */
+
+static alloc_pool phi_translate_pool;
+
/* Return the hash value for a phi translation table entry. */
static hashval_t
@@ -571,7 +575,8 @@ static inline void
phi_trans_add (pre_expr e, pre_expr v, basic_block pred)
{
void **slot;
- expr_pred_trans_t new_pair = XNEW (struct expr_pred_trans_d);
+ expr_pred_trans_t new_pair
+ = (expr_pred_trans_t) pool_alloc (phi_translate_pool);
new_pair->e = e;
new_pair->pred = pred;
new_pair->v = v;
@@ -580,7 +585,8 @@ phi_trans_add (pre_expr e, pre_expr v, b
slot = htab_find_slot_with_hash (phi_translate_table, new_pair,
new_pair->hashcode, INSERT);
- free (*slot);
+ if (*slot)
+ pool_free (phi_translate_pool, *slot);
*slot = (void *) new_pair;
}
@@ -4804,8 +4810,12 @@ init_pre (bool do_fre)
calculate_dominance_info (CDI_DOMINATORS);
bitmap_obstack_initialize (&grand_bitmap_obstack);
+ phi_translate_pool = create_alloc_pool ("phi_translate_table pool",
+ sizeof (struct expr_pred_trans_d),
+ 4096);
+ /* NULL as free because we'll free the whole pool in the end. */
phi_translate_table = htab_create (5110, expr_pred_trans_hash,
- expr_pred_trans_eq, free);
+ expr_pred_trans_eq, NULL);
expression_to_id = htab_create (num_ssa_names * 3,
pre_expr_hash,
pre_expr_eq, NULL);
@@ -4839,6 +4849,7 @@ fini_pre (bool do_fre)
free_alloc_pool (bitmap_set_pool);
free_alloc_pool (pre_expr_pool);
htab_delete (phi_translate_table);
+ free_alloc_pool (phi_translate_pool);
htab_delete (expression_to_id);
VEC_free (unsigned, heap, name_to_id);
