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(subst_prev_insn): Remove variable and all uses. 

From-SVN: r7852
This commit is contained in:
Richard Kenner 1994-08-02 18:38:10 -04:00
parent 2454c8d449
commit 3adde2a5c6
1 changed files with 6 additions and 18 deletions
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24
gcc/combine.c
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@ -170,11 +170,6 @@ static int last_call_cuid;
static rtx subst_insn;
/* If nonzero, this is the insn that should be presumed to be
immediately in front of `subst_insn'. */
static rtx subst_prev_insn;
/* This is the lowest CUID that `subst' is currently dealing with.
get_last_value will not return a value if the register was set at or
after this CUID. If not for this mechanism, we could get confused if
@ -1240,7 +1235,6 @@ try_combine (i3, i2, i1)
if (i1 && INSN_CUID (i1) > INSN_CUID (i2))
temp = i1, i1 = i2, i2 = temp;
subst_prev_insn = 0;
added_links_insn = 0;
/* First check for one important special-case that the code below will
@ -1356,9 +1350,8 @@ try_combine (i3, i2, i1)
never appear in the insn stream so giving it the same INSN_UID
as I2 will not cause a problem. */
subst_prev_insn = i1
= gen_rtx (INSN, VOIDmode, INSN_UID (i2), 0, i2,
XVECEXP (PATTERN (i2), 0, 1), -1, 0, 0);
i1 = gen_rtx (INSN, VOIDmode, INSN_UID (i2), 0, i2,
XVECEXP (PATTERN (i2), 0, 1), -1, 0, 0);
SUBST (PATTERN (i2), XVECEXP (PATTERN (i2), 0, 0));
SUBST (XEXP (SET_SRC (PATTERN (i2)), 0),
@ -9826,15 +9819,10 @@ get_last_value (x)
{
rtx insn, set;
/* If there is an insn that is supposed to be immediately
in front of subst_insn, use it. */
if (subst_prev_insn != 0)
insn = subst_prev_insn;
else
for (insn = prev_nonnote_insn (subst_insn);
insn && INSN_CUID (insn) >= subst_low_cuid;
insn = prev_nonnote_insn (insn))
;
for (insn = prev_nonnote_insn (subst_insn);
insn && INSN_CUID (insn) >= subst_low_cuid;
insn = prev_nonnote_insn (insn))
;
if (insn
&& (set = single_set (insn)) != 0