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(a29k_clobbers_to): New function.

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From-SVN: r7276
This commit is contained in:
Richard Kenner 1994-05-11 16:50:16 -04:00
parent 13275056a7
commit f5fa450784
1 changed files with 27 additions and 0 deletions
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27
gcc/config/a29k/a29k.c
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@ -802,6 +802,33 @@ incoming_reg (start, count)
return R_AR (start);
}
/* Add CLOBBERs to CALL_INSN_FUNCTION_USAGE chain of INSN indicating
that LR2 up to, but not including, OP are clobbered. If OP is
zero, indicate all parameter registers are clobbered. */
void
a29k_clobbers_to (insn, op)
rtx insn;
rtx op;
{
int i;
int high_regno;
if (op == 0)
high_regno = R_LR (18);
else if (GET_CODE (op) != REG || REGNO (op) < R_LR (0)
|| REGNO (op) > R_LR (18))
abort ();
else
high_regno = REGNO (op);
for (i = R_LR (2); i < high_regno; i++)
CALL_INSN_FUNCTION_USAGE (insn)
= gen_rtx (EXPR_LIST, VOIDmode,
gen_rtx (CLOBBER, VOIDmode, gen_rtx (REG, SImode, i)),
CALL_INSN_FUNCTION_USAGE (insn));
}
/* These routines are used in finding insns to fill delay slots in the
epilogue. */