- case CODE_LABEL:
- case JUMP_INSN:
- case INSN:
- case BARRIER:
- break;
-
- case CALL_INSN:
- if (GET_CODE (PATTERN (insn)) == CALL_PLACEHOLDER)
- {
- /* Scan each of the alternatives for label refs. */
- lvl = find_label_refs (XEXP (PATTERN (insn), 0), lvl);
- lvl = find_label_refs (XEXP (PATTERN (insn), 1), lvl);
- lvl = find_label_refs (XEXP (PATTERN (insn), 2), lvl);
- /* Record its tail recursion label, if any. */
- if (XEXP (PATTERN (insn), 3) != NULL_RTX)
- trll = alloc_EXPR_LIST (0, XEXP (PATTERN (insn), 3), trll);
- }
- break;
-
- default:
- abort ();
- }
-
- if (GET_CODE (insn) == INSN || GET_CODE (insn) == CALL_INSN)
- {
- rtx note;
-
- /* Make a list of all labels referred to other than by jumps.
-
- Make a special exception for labels followed by an ADDR*VEC,
- as this would be a part of the tablejump setup code.
-
- Make a special exception to registers loaded with label
- values just before jump insns that use them. */
-
- for (note = REG_NOTES (insn); note; note = XEXP (note, 1))
- if (REG_NOTE_KIND (note) == REG_LABEL)
- {
- rtx lab = XEXP (note, 0), next;
-
- if ((next = next_nonnote_insn (lab)) != NULL
- && GET_CODE (next) == JUMP_INSN
- && (GET_CODE (PATTERN (next)) == ADDR_VEC
- || GET_CODE (PATTERN (next)) == ADDR_DIFF_VEC))
- ;
- else if (GET_CODE (lab) == NOTE)
- ;
- else if (GET_CODE (NEXT_INSN (insn)) == JUMP_INSN
- && find_reg_note (NEXT_INSN (insn), REG_LABEL, lab))
- ;
- else
- lvl = alloc_EXPR_LIST (0, XEXP (note, 0), lvl);
- }
- }
- }
-
- if (head != NULL_RTX)
- create_basic_block_structure (i++, head, end, bb_note);
- else if (bb_note)
- delete_insn (bb_note);
-
- if (i != n_basic_blocks)
- abort ();
-
- label_value_list = lvl;
- tail_recursion_label_list = trll;
- clear_aux_for_blocks ();