You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#include "config.h"
#include "system.h"
#include "ggc.h"
#include "basic-block.h"
#include "output.h"
-#include "errors.h"
#include "expr.h"
#include "function.h"
#include "diagnostic.h"
COND_EXPRs and SWITCH_EXPRs.
We want to do those propagations as they can sometimes allow
- the SSA optimziers to do a better job. However, in the cases
+ the SSA optimizers to do a better job. However, in the cases
where such propagations do not result in further optimization,
we would like to "undo" the propagation to avoid the redundant
copies and constant initializations.
leading to this block. If no such edge equivalency exists, then we
record NULL. These equivalences are live until we leave the dominator
subtree rooted at the block where we record the equivalency. */
-static varray_type equiv_stack;
+static VEC(tree,heap) *equiv_stack;
/* Global hash table implementing a mapping from invariant values
to a list of SSA_NAMEs which have the same value. We might be
tree value;
/* List of SSA_NAMEs which have the same value/key. */
- varray_type equivalences;
+ VEC(tree,heap) *equivalences;
};
static void uncprop_initialize_block (struct dom_walk_data *, basic_block);
return operand_equal_p (value1, value2, 0);
}
+/* Free an instance of equiv_hash_elt. */
+
+static void
+equiv_free (void *p)
+{
+ struct equiv_hash_elt *elt = (struct equiv_hash_elt *) p;
+ VEC_free (tree, heap, elt->equivalences);
+ free (elt);
+}
+
/* Remove the most recently recorded equivalency for VALUE. */
static void
slot = htab_find_slot (equiv, &equiv_hash_elt, NO_INSERT);
equiv_hash_elt_p = (struct equiv_hash_elt *) *slot;
- VARRAY_POP (equiv_hash_elt_p->equivalences);
+ VEC_pop (tree, equiv_hash_elt_p->equivalences);
}
/* Record EQUIVALENCE = VALUE into our hash table. */
equiv_hash_elt = (struct equiv_hash_elt *) *slot;
- if (!equiv_hash_elt->equivalences)
- VARRAY_TREE_INIT (equiv_hash_elt->equivalences, 10, "value equivs");
- VARRAY_PUSH_TREE (equiv_hash_elt->equivalences, equivalence);
+ VEC_safe_push (tree, heap, equiv_hash_elt->equivalences, equivalence);
}
/* Main driver for un-cprop. */
associate_equivalences_with_edges ();
/* Create our global data structures. */
- equiv = htab_create (1024, equiv_hash, equiv_eq, free);
- VARRAY_TREE_INIT (equiv_stack, 2, "Block equiv stack");
+ equiv = htab_create (1024, equiv_hash, equiv_eq, equiv_free);
+ equiv_stack = VEC_alloc (tree, heap, 2);
/* We're going to do a dominator walk, so ensure that we have
dominance information. */
/* Finalize and clean up. */
fini_walk_dominator_tree (&walk_data);
- /* EQUIV_STACK should already be empty at this point, so we just need
- to empty elements out of the hash table and cleanup the AUX field
- on the edges. */
+ /* EQUIV_STACK should already be empty at this point, so we just
+ need to empty elements out of the hash table, free EQUIV_STACK,
+ and cleanup the AUX field on the edges. */
htab_delete (equiv);
+ VEC_free (tree, heap, equiv_stack);
FOR_EACH_BB (bb)
{
edge e;
uncprop_finalize_block (struct dom_walk_data *walk_data ATTRIBUTE_UNUSED,
basic_block bb ATTRIBUTE_UNUSED)
{
- tree value = VARRAY_TOP_TREE (equiv_stack);
-
/* Pop the topmost value off the equiv stack. */
- VARRAY_POP (equiv_stack);
+ tree value = VEC_pop (tree, equiv_stack);
/* If that value was non-null, then pop the topmost equivalency off
its equivalency stack. */
/* Walk every equivalence with the same value. If we find
one with the same underlying variable as the PHI result,
then replace the value in the argument with its equivalent
- SSA_NAME. Use the most recent equivlance as hopefully
+ SSA_NAME. Use the most recent equivalence as hopefully
that results in shortest lifetimes. */
- for (j = VARRAY_ACTIVE_SIZE (elt->equivalences) - 1; j >= 0; j--)
+ for (j = VEC_length (tree, elt->equivalences) - 1; j >= 0; j--)
{
- tree equiv = VARRAY_TREE (elt->equivalences, j);
+ tree equiv = VEC_index (tree, elt->equivalences, j);
if (SSA_NAME_VAR (equiv) == SSA_NAME_VAR (PHI_RESULT (phi)))
{
struct edge_equivalency *equiv = e->aux;
record_equiv (equiv->rhs, equiv->lhs);
- VARRAY_PUSH_TREE (equiv_stack, equiv->rhs);
+ VEC_safe_push (tree, heap, equiv_stack, equiv->rhs);
recorded = true;
}
}
if (!recorded)
- VARRAY_PUSH_TREE (equiv_stack, NULL_TREE);
+ VEC_safe_push (tree, heap, equiv_stack, NULL_TREE);
}
static bool
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