static struct
{
- /* The number of statements sunk down the flowgraph by code sinking. */
+ /* The number of statements sunk down the flowgraph by code sinking. */
int sunk;
} 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. */
and all the other uses are in phis in the same basic block, but this
requires some expensive checking later (you have to make sure no def/vdef
in the statement occurs for multiple edges in the various phi nodes it's
- used in, so that you only have one place you can sink it to. */
+ 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;
}
/* 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;
+ int idx = PHI_ARG_INDEX_FROM_USE (use_p);
+
+ useblock = PHI_ARG_EDGE (usestmt, idx)->src;
/* Short circuit. Nothing dominates the entry block. */
if (useblock == ENTRY_BLOCK_PTR)
{
}
bitmap_set_bit (blocks, useblock->index);
}
- }
- else
- {
- useblock = bb_for_stmt (usestmt);
-
- /* Short circuit. Nothing dominates the entry block. */
- if (useblock == ENTRY_BLOCK_PTR)
+ else
{
- BITMAP_FREE (blocks);
- return NULL;
+ useblock = bb_for_stmt (usestmt);
+
+ /* Short circuit. Nothing dominates the entry block. */
+ if (useblock == ENTRY_BLOCK_PTR)
+ {
+ BITMAP_FREE (blocks);
+ return NULL;
+ }
+ bitmap_set_bit (blocks, useblock->index);
}
- bitmap_set_bit (blocks, useblock->index);
}
}
commondom = BASIC_BLOCK (bitmap_first_set_bit (blocks));
/* Given a statement (STMT) and the basic block it is currently in (FROMBB),
determine the location to sink the statement to, if any.
Return the basic block to sink it to, or NULL if we should not sink
- it. */
+ it. */
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)
|| 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)
+ || ann->has_volatile_ops)
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);
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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