+/* This routine will relink all uses with the same stmt as HEAD into the list
+ immediately following HEAD for iterator IMM. */
+
+static inline void
+link_use_stmts_after (use_operand_p head, imm_use_iterator *imm)
+{
+ use_operand_p use_p;
+ use_operand_p last_p = head;
+ gimple head_stmt = USE_STMT (head);
+ tree use = USE_FROM_PTR (head);
+ ssa_op_iter op_iter;
+ int flag;
+
+ /* Only look at virtual or real uses, depending on the type of HEAD. */
+ flag = (is_gimple_reg (use) ? SSA_OP_USE : SSA_OP_VIRTUAL_USES);
+
+ if (gimple_code (head_stmt) == GIMPLE_PHI)
+ {
+ FOR_EACH_PHI_ARG (use_p, head_stmt, op_iter, flag)
+ if (USE_FROM_PTR (use_p) == use)
+ last_p = move_use_after_head (use_p, head, last_p);
+ }
+ else
+ {
+ if (flag == SSA_OP_USE)
+ {
+ FOR_EACH_SSA_USE_OPERAND (use_p, head_stmt, op_iter, flag)
+ if (USE_FROM_PTR (use_p) == use)
+ last_p = move_use_after_head (use_p, head, last_p);
+ }
+ else if ((use_p = gimple_vuse_op (head_stmt)) != NULL_USE_OPERAND_P)
+ {
+ if (USE_FROM_PTR (use_p) == use)
+ last_p = move_use_after_head (use_p, head, last_p);
+ }
+ }
+ /* Link iter node in after last_p. */
+ if (imm->iter_node.prev != NULL)
+ delink_imm_use (&imm->iter_node);
+ link_imm_use_to_list (&(imm->iter_node), last_p);
+}
+
+/* Initialize IMM to traverse over uses of VAR. Return the first statement. */
+static inline gimple
+first_imm_use_stmt (imm_use_iterator *imm, tree var)
+{
+ imm->end_p = &(SSA_NAME_IMM_USE_NODE (var));
+ imm->imm_use = imm->end_p->next;
+ imm->next_imm_name = NULL_USE_OPERAND_P;
+
+ /* iter_node is used as a marker within the immediate use list to indicate
+ where the end of the current stmt's uses are. Initialize it to NULL
+ stmt and use, which indicates a marker node. */
+ imm->iter_node.prev = NULL_USE_OPERAND_P;
+ imm->iter_node.next = NULL_USE_OPERAND_P;
+ imm->iter_node.loc.stmt = NULL;
+ imm->iter_node.use = NULL;
+
+ if (end_imm_use_stmt_p (imm))
+ return NULL;
+
+ link_use_stmts_after (imm->imm_use, imm);
+
+ return USE_STMT (imm->imm_use);
+}
+
+/* Bump IMM to the next stmt which has a use of var. */
+
+static inline gimple
+next_imm_use_stmt (imm_use_iterator *imm)
+{
+ imm->imm_use = imm->iter_node.next;
+ if (end_imm_use_stmt_p (imm))
+ {
+ if (imm->iter_node.prev != NULL)
+ delink_imm_use (&imm->iter_node);
+ return NULL;
+ }
+
+ link_use_stmts_after (imm->imm_use, imm);
+ return USE_STMT (imm->imm_use);
+}
+
+/* This routine will return the first use on the stmt IMM currently refers
+ to. */
+
+static inline use_operand_p
+first_imm_use_on_stmt (imm_use_iterator *imm)
+{
+ imm->next_imm_name = imm->imm_use->next;
+ return imm->imm_use;