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Eliminate broken unused function.

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* rtl.h (reg_set_last): Delete declaration.
	* rtlanal.c (reg_set_last): Delete.

From-SVN: r80879
This commit is contained in:
James E Wilson 2004-04-20 03:57:59 +00:00 committed by Jim Wilson
parent e419fe91e5
commit a1bac22c43
3 changed files with 5 additions and 49 deletions

5
gcc/ChangeLog

@ -1,3 +1,8 @@
2004-04-19 James E Wilson <wilson@specifixinc.com>
* rtl.h (reg_set_last): Delete declaration.
* rtlanal.c (reg_set_last): Delete.
2004-04-19 Roger Sayle <roger@eyesopen.com>
* fold-const.c (fold_convert): Make function extern/public.

1
gcc/rtl.h

@ -1844,7 +1844,6 @@ extern int reg_overlap_mentioned_p (rtx, rtx);
extern rtx set_of (rtx, rtx);
extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
extern rtx reg_set_last (rtx, rtx);
extern int dead_or_set_p (rtx, rtx);
extern int dead_or_set_regno_p (rtx, unsigned int);
extern rtx find_reg_note (rtx, enum reg_note, rtx);

48
gcc/rtlanal.c

@ -1598,54 +1598,6 @@ reg_overlap_mentioned_p (rtx x, rtx in)
}
}
/* Return the last value to which REG was set prior to INSN. If we can't
find it easily, return 0.
We only return a REG, SUBREG, or constant because it is too hard to
check if a MEM remains unchanged. */
rtx
reg_set_last (rtx x, rtx insn)
{
rtx orig_insn = insn;
/* Scan backwards until reg_set_last_1 changed one of the above flags.
Stop when we reach a label or X is a hard reg and we reach a
CALL_INSN (if reg_set_last_last_regno is a hard reg).
If we find a set of X, ensure that its SET_SRC remains unchanged. */
/* We compare with <= here, because reg_set_last_last_regno
is actually the number of the first reg *not* in X. */
for (;
insn && GET_CODE (insn) != CODE_LABEL
&& ! (GET_CODE (insn) == CALL_INSN
&& REGNO (x) <= FIRST_PSEUDO_REGISTER);
insn = PREV_INSN (insn))
if (INSN_P (insn))
{
rtx set = set_of (x, insn);
/* OK, this function modify our register. See if we understand it. */
if (set)
{
rtx last_value;
if (GET_CODE (set) != SET || SET_DEST (set) != x)
return 0;
last_value = SET_SRC (x);
if (CONSTANT_P (last_value)
|| ((GET_CODE (last_value) == REG
|| GET_CODE (last_value) == SUBREG)
&& ! reg_set_between_p (last_value,
insn, orig_insn)))
return last_value;
else
return 0;
}
}
return 0;
}
/* Call FUN on each register or MEM that is stored into or clobbered by X.
(X would be the pattern of an insn).
FUN receives two arguments: