- rtx testreg = SET_DEST (x);
- int mark_dest = 0;
-
- /* If storing into MEM, don't show it as being used. But do
- show the address as being used. */
- if (GET_CODE (testreg) == MEM)
- {
-#ifdef AUTO_INC_DEC
- if (flags & PROP_AUTOINC)
- find_auto_inc (pbi, testreg, insn);
-#endif
- mark_used_regs (pbi, XEXP (testreg, 0), cond, insn);
- mark_used_regs (pbi, SET_SRC (x), cond, insn);
- return;
- }
-
- /* Storing in STRICT_LOW_PART is like storing in a reg
- in that this SET might be dead, so ignore it in TESTREG.
- but in some other ways it is like using the reg.
-
- Storing in a SUBREG or a bit field is like storing the entire
- register in that if the register's value is not used
- then this SET is not needed. */
- while (GET_CODE (testreg) == STRICT_LOW_PART
- || GET_CODE (testreg) == ZERO_EXTRACT
- || GET_CODE (testreg) == SIGN_EXTRACT
- || GET_CODE (testreg) == SUBREG)
- {
-#ifdef CANNOT_CHANGE_MODE_CLASS
- if ((flags & PROP_REG_INFO)
- && GET_CODE (testreg) == SUBREG
- && GET_CODE (SUBREG_REG (testreg)) == REG
- && REGNO (SUBREG_REG (testreg)) >= FIRST_PSEUDO_REGISTER)
- bitmap_set_bit (&subregs_of_mode, REGNO (SUBREG_REG (testreg))
- * MAX_MACHINE_MODE
- + GET_MODE (testreg));
-#endif
-
- /* Modifying a single register in an alternate mode
- does not use any of the old value. But these other
- ways of storing in a register do use the old value. */
- if (GET_CODE (testreg) == SUBREG
- && !((REG_BYTES (SUBREG_REG (testreg))
- + UNITS_PER_WORD - 1) / UNITS_PER_WORD
- > (REG_BYTES (testreg)
- + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
- ;
- else
- mark_dest = 1;
-
- testreg = XEXP (testreg, 0);
- }
-
- /* If this is a store into a register or group of registers,
- recursively scan the value being stored. */
-
- if ((GET_CODE (testreg) == PARALLEL
- && GET_MODE (testreg) == BLKmode)
- || (GET_CODE (testreg) == REG
- && (regno = REGNO (testreg),
- ! (regno == FRAME_POINTER_REGNUM
- && (! reload_completed || frame_pointer_needed)))
-#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
- && ! (regno == HARD_FRAME_POINTER_REGNUM
- && (! reload_completed || frame_pointer_needed))
-#endif
-#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
- && ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
-#endif
- ))
+ rtx dest = SET_DEST (x);
+ int i;
+ bool ret = false;
+
+ if (GET_CODE (dest) == PARALLEL)
+ for (i = 0; i < XVECLEN (dest, 0); i++)
+ ret |= mark_used_dest_regs (pbi, XVECEXP (dest, 0, i), cond, insn);
+ else
+ ret = mark_used_dest_regs (pbi, dest, cond, insn);
+
+ if (ret)