SET_REGNO_REG_SET (&new->live_throughout, regno + i);
}
}
+
+ /* If CHAIN->INSN is a call, then the registers which contain
+ the arguments to the function are live in the new insn. */
+ if (CALL_P (chain->insn))
+ {
+ for (link = CALL_INSN_FUNCTION_USAGE (chain->insn);
+ link != NULL_RTX;
+ link = XEXP (link, 1))
+ {
+ rtx arg = XEXP (link, 0);
+
+ if (GET_CODE (arg) == USE)
+ {
+ rtx reg = XEXP (arg, 0);
+
+ if (REG_P (reg))
+ {
+ int i, regno = REGNO (reg);
+
+ /* Registers in CALL_INSN_FUNCTION_USAGE are always
+ hard registers. */
+ gcc_assert (regno < FIRST_PSEUDO_REGISTER);
+
+ for (i = hard_regno_nregs[regno][GET_MODE (reg)] - 1;
+ i >= 0; i--)
+ SET_REGNO_REG_SET (&new->live_throughout, regno + i);
+ }
+ }
+ }
+
+ }
+
CLEAR_REG_SET (&new->dead_or_set);
if (chain->insn == BB_HEAD (BASIC_BLOCK (chain->block)))
BB_HEAD (BASIC_BLOCK (chain->block)) = new->insn;