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 "coretypes.h"
#include "tm.h"
-#include "errors.h"
#include "ggc.h"
#include "tree.h"
#include "basic-block.h"
} sink_stats;
-/* Given a PHI, and one of it's arguments (DEF), find the edge for
+/* Given a PHI, and one of its arguments (DEF), find the edge for
that argument and return it. If the argument occurs twice in the PHI node,
we return NULL. */
used in, so that you only have one place you can sink it to. */
static bool
-all_immediate_uses_same_place (dataflow_t imm)
+all_immediate_uses_same_place (tree stmt)
{
- int i;
- tree firstuse;
-
- if (imm == NULL || num_immediate_uses (imm) < 2)
- return true;
- firstuse = immediate_use (imm, 0);
+ tree firstuse = NULL_TREE;
+ ssa_op_iter op_iter;
+ imm_use_iterator imm_iter;
+ use_operand_p use_p;
+ tree var;
- for (i = 1; i < num_immediate_uses (imm); i++)
+ FOR_EACH_SSA_TREE_OPERAND (var, stmt, op_iter, SSA_OP_ALL_DEFS)
{
- tree immuse = immediate_use (imm, i);
- if (immuse != firstuse)
- return false;
+ FOR_EACH_IMM_USE_FAST (use_p, imm_iter, var)
+ {
+ if (firstuse == NULL_TREE)
+ firstuse = USE_STMT (use_p);
+ else
+ if (firstuse != USE_STMT (use_p))
+ return false;
+ }
}
+
return true;
}
bool
is_hidden_global_store (tree stmt)
{
- stmt_ann_t ann = stmt_ann (stmt);
- v_may_def_optype v_may_defs;
- v_must_def_optype v_must_defs;
-
/* Check virtual definitions. If we get here, the only virtual
definitions we should see are those generated by assignment
statements. */
- v_may_defs = V_MAY_DEF_OPS (ann);
- v_must_defs = V_MUST_DEF_OPS (ann);
- if (NUM_V_MAY_DEFS (v_may_defs) > 0 || NUM_V_MUST_DEFS (v_must_defs) > 0)
+ if (!ZERO_SSA_OPERANDS (stmt, SSA_OP_VIRTUAL_DEFS))
{
tree lhs;
/* Find the nearest common dominator of all of the immediate uses in IMM. */
static basic_block
-nearest_common_dominator_of_uses (dataflow_t imm)
+nearest_common_dominator_of_uses (tree stmt)
{
bitmap blocks = BITMAP_ALLOC (NULL);
basic_block commondom;
- int i;
unsigned int j;
bitmap_iterator bi;
+ ssa_op_iter op_iter;
+ imm_use_iterator imm_iter;
+ use_operand_p use_p;
+ tree var;
+
bitmap_clear (blocks);
- for (i = 0; i < num_immediate_uses (imm); i++)
+ FOR_EACH_SSA_TREE_OPERAND (var, stmt, op_iter, SSA_OP_ALL_DEFS)
{
- tree usestmt = immediate_use (imm, i);
- basic_block useblock;
- if (TREE_CODE (usestmt) == PHI_NODE)
- {
- int j;
- for (j = 0; j < PHI_NUM_ARGS (usestmt); j++)
+ FOR_EACH_IMM_USE_FAST (use_p, imm_iter, var)
+ {
+ tree usestmt = USE_STMT (use_p);
+ basic_block useblock;
+
+ if (TREE_CODE (usestmt) == PHI_NODE)
{
- useblock = PHI_ARG_EDGE (usestmt, j)->src;
- /* Short circuit. Nothing dominates the entry block. */
- if (useblock == ENTRY_BLOCK_PTR)
- {
- BITMAP_FREE (blocks);
- return NULL;
- }
- bitmap_set_bit (blocks, useblock->index);
+ int idx = PHI_ARG_INDEX_FROM_USE (use_p);
+
+ useblock = PHI_ARG_EDGE (usestmt, idx)->src;
+ }
+ else
+ {
+ useblock = bb_for_stmt (usestmt);
}
- }
- else
- {
- useblock = bb_for_stmt (usestmt);
/* Short circuit. Nothing dominates the entry block. */
if (useblock == ENTRY_BLOCK_PTR)
static tree
statement_sink_location (tree stmt, basic_block frombb)
{
- dataflow_t imm = get_immediate_uses (stmt);
tree use, def;
+ use_operand_p one_use = NULL_USE_OPERAND_P;
basic_block sinkbb;
use_operand_p use_p;
def_operand_p def_p;
ssa_op_iter iter;
stmt_ann_t ann;
tree rhs;
+ imm_use_iterator imm_iter;
+
+ FOR_EACH_SSA_TREE_OPERAND (def, stmt, iter, SSA_OP_ALL_DEFS)
+ {
+ FOR_EACH_IMM_USE_FAST (one_use, imm_iter, def)
+ {
+ break;
+ }
+ if (one_use != NULL_USE_OPERAND_P)
+ break;
+ }
- if (imm == NULL)
+ /* Return if there are no immediate uses of this stmt. */
+ if (one_use == NULL_USE_OPERAND_P)
return NULL;
if (TREE_CODE (stmt) != MODIFY_EXPR)
*/
ann = stmt_ann (stmt);
- if (NUM_VUSES (STMT_VUSE_OPS (stmt)) != 0
- || stmt_ends_bb_p (stmt)
+ if (stmt_ends_bb_p (stmt)
|| TREE_SIDE_EFFECTS (rhs)
|| TREE_CODE (rhs) == EXC_PTR_EXPR
|| TREE_CODE (rhs) == FILTER_EXPR
|| is_hidden_global_store (stmt)
|| ann->has_volatile_ops
- || num_immediate_uses (imm) == 0)
+ || !ZERO_SSA_OPERANDS (stmt, SSA_OP_VUSE))
return NULL;
FOR_EACH_SSA_DEF_OPERAND (def_p, stmt, iter, SSA_OP_ALL_DEFS)
common dominator of all the immediate uses. For PHI nodes, we have to
find the nearest common dominator of all of the predecessor blocks, since
that is where insertion would have to take place. */
- if (!all_immediate_uses_same_place (imm))
+ if (!all_immediate_uses_same_place (stmt))
{
- basic_block commondom = nearest_common_dominator_of_uses (imm);
+ basic_block commondom = nearest_common_dominator_of_uses (stmt);
if (commondom == frombb)
return NULL;
return first_stmt (commondom);
}
- use = immediate_use (imm, 0);
+ use = USE_STMT (one_use);
if (TREE_CODE (use) != PHI_NODE)
{
sinkbb = bb_for_stmt (use);
}
/* Note that at this point, all uses must be in the same statement, so it
- doesn't matter which def op we choose. */
- if (STMT_DEF_OPS (stmt) == NULL)
- {
- if (STMT_V_MAY_DEF_OPS (stmt) != NULL)
- def = V_MAY_DEF_RESULT (STMT_V_MAY_DEF_OPS (stmt), 0);
- else if (STMT_V_MUST_DEF_OPS (stmt) != NULL)
- def = V_MUST_DEF_RESULT (STMT_V_MUST_DEF_OPS (stmt), 0);
- else
- gcc_unreachable ();
- }
- else
- def = DEF_OP (STMT_DEF_OPS (stmt), 0);
+ doesn't matter which def op we choose, pick the first one. */
+ FOR_EACH_SSA_TREE_OPERAND (def, stmt, iter, SSA_OP_ALL_DEFS)
+ break;
+
sinkbb = find_bb_for_arg (use, def);
if (!sinkbb)
tree stmt = bsi_stmt (bsi);
block_stmt_iterator tobsi;
tree sinkstmt;
- get_stmt_operands (stmt);
sinkstmt = statement_sink_location (stmt, bb);
if (!sinkstmt)
connect_infinite_loops_to_exit ();
memset (&sink_stats, 0, sizeof (sink_stats));
calculate_dominance_info (CDI_DOMINATORS | CDI_POST_DOMINATORS);
- compute_immediate_uses (TDFA_USE_OPS | TDFA_USE_VOPS, NULL);
sink_code_in_bb (EXIT_BLOCK_PTR);
if (dump_file && (dump_flags & TDF_STATS))
fprintf (dump_file, "Sunk statements:%d\n", sink_stats.sunk);
free_dominance_info (CDI_POST_DOMINATORS);
remove_fake_exit_edges ();
- free_df ();
loop_optimizer_finalize (loops, dump_file);
}
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_rename_vars | TODO_dump_func | TODO_ggc_collect | TODO_verify_ssa, /* todo_flags_finish */
+ TODO_update_ssa
+ | TODO_dump_func
+ | TODO_ggc_collect
+ | TODO_verify_ssa, /* todo_flags_finish */
0 /* letter */
};
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