return false;
cand_value_at (loop, cand, use->stmt, nit, &bnd);
+
*bound = aff_combination_to_tree (&bnd);
+ /* It is unlikely that computing the number of iterations using division
+ would be more profitable than keeping the original induction variable. */
+ if (expression_expensive_p (*bound))
+ return false;
return true;
}
static comp_cost
iv_ca_cost (struct iv_ca *ivs)
{
- return (ivs->bad_uses ? infinite_cost : ivs->cost);
+ /* This was a conditional expression but it triggered a bug in
+ Sun C 5.5. */
+ if (ivs->bad_uses)
+ return infinite_cost;
+ else
+ return ivs->cost;
}
/* Returns true if all dependences of CP are among invariants in IVS. */
{
tree var = var_at_stmt (data->current_loop, cand, use->stmt);
tree var_type = TREE_TYPE (var);
+ gimple_seq stmts;
compare = iv_elimination_compare (data, use);
bound = unshare_expr (fold_convert (var_type, bound));
- op = force_gimple_operand_gsi (&bsi, bound, true, NULL_TREE,
- true, GSI_SAME_STMT);
+ op = force_gimple_operand (bound, &stmts, true, NULL_TREE);
+ if (stmts)
+ gsi_insert_seq_on_edge_immediate (
+ loop_preheader_edge (data->current_loop),
+ stmts);
gimple_cond_set_lhs (use->stmt, var);
gimple_cond_set_code (use->stmt, compare);