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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; 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. /* 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 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 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)) if (i1 && INSN_CUID (i1) > INSN_CUID (i2))
temp = i1, i1 = i2, i2 = temp; temp = i1, i1 = i2, i2 = temp;
subst_prev_insn = 0;
added_links_insn = 0; added_links_insn = 0;
/* First check for one important special-case that the code below will /* 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 never appear in the insn stream so giving it the same INSN_UID
as I2 will not cause a problem. */ as I2 will not cause a problem. */
subst_prev_insn = i1 i1 = gen_rtx (INSN, VOIDmode, INSN_UID (i2), 0, i2,
= gen_rtx (INSN, VOIDmode, INSN_UID (i2), 0, i2, XVECEXP (PATTERN (i2), 0, 1), -1, 0, 0);
XVECEXP (PATTERN (i2), 0, 1), -1, 0, 0);
SUBST (PATTERN (i2), XVECEXP (PATTERN (i2), 0, 0)); SUBST (PATTERN (i2), XVECEXP (PATTERN (i2), 0, 0));
SUBST (XEXP (SET_SRC (PATTERN (i2)), 0), SUBST (XEXP (SET_SRC (PATTERN (i2)), 0),
@ -9826,15 +9819,10 @@ get_last_value (x)
{ {
rtx insn, set; rtx insn, set;
/* If there is an insn that is supposed to be immediately for (insn = prev_nonnote_insn (subst_insn);
in front of subst_insn, use it. */ insn && INSN_CUID (insn) >= subst_low_cuid;
if (subst_prev_insn != 0) insn = prev_nonnote_insn (insn))
insn = subst_prev_insn; ;
else
for (insn = prev_nonnote_insn (subst_insn);
insn && INSN_CUID (insn) >= subst_low_cuid;
insn = prev_nonnote_insn (insn))
;
if (insn if (insn
&& (set = single_set (insn)) != 0 && (set = single_set (insn)) != 0