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(sched_analyze_2): Remove an explicit dependence between an insn that uses CC0 and the immediately previous insn. 

(sched_analyze_2): Remove an explicit dependence between an insn
that uses CC0 and the immediately previous insn.
(SCHED_GROUP_P represents the dependence.)
(schedule_block): Only check sets_cc0_p on an insn.

From-SVN: r2010
This commit is contained in:
Jim Wilson 1992-08-31 18:26:25 -07:00
parent 4ecc65ac4e
commit 11222b61f1
1 changed files with 9 additions and 3 deletions
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12
gcc/sched.c
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@ -1717,12 +1717,16 @@ sched_analyze_2 (x, insn)
/* Make a copy of all dependencies on the immediately previous insn,
and add to this insn. This is so that all the dependencies will
apply to the group. */
apply to the group. Remove an explicit dependence on this insn
as SCHED_GROUP_P now represents it. */
prev = PREV_INSN (insn);
while (GET_CODE (prev) == NOTE)
prev = PREV_INSN (prev);
if (find_insn_list (prev, LOG_LINKS (insn)))
remove_dependence (insn, prev);
for (link = LOG_LINKS (prev); link; link = XEXP (link, 1))
add_dependence (insn, XEXP (link, 0), GET_MODE (link));
@ -2933,10 +2937,12 @@ schedule_block (b, file)
at the end because they can't be moved away from their cc0 user. */
last = 0;
while (GET_CODE (insn) == CALL_INSN || GET_CODE (insn) == JUMP_INSN
|| (GET_CODE (insn) == INSN && GET_CODE (PATTERN (insn)) == USE)
|| (GET_CODE (insn) == INSN
&& (GET_CODE (PATTERN (insn)) == USE
#ifdef HAVE_cc0
|| sets_cc0_p (PATTERN (insn))
|| sets_cc0_p (PATTERN (insn))
#endif
))
|| GET_CODE (insn) == NOTE)
{
if (GET_CODE (insn) != NOTE)