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haifa-sched.c (schedule_block): Don't crash if there's no next insn for an interblock movement. 

* haifa-sched.c (schedule_block): Don't crash if there's no
        next insn for an interblock movement.
        (add_branch_dependences): Don't allow clobber insns to move either.

From-SVN: r30422
This commit is contained in:
Richard Henderson 1999-11-05 12:04:27 -08:00 committed by Richard Henderson
parent 3496699a4c
commit b182031edf
2 changed files with 15 additions and 7 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Fri Nov 5 12:04:02 1999 Richard Henderson <rth@cygnus.com>
* haifa-sched.c (schedule_block): Don't crash if there's no
next insn for an interblock movement.
(add_branch_dependences): Don't allow clobber insns to move either.
Fri Nov 5 10:18:11 1999 Richard Henderson <rth@cygnus.com>
* i386.c (split_xf): New.

16
gcc/haifa-sched.c
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@ -5876,7 +5876,6 @@ schedule_block (bb, rgn_n_insns)
|| (insn_issue_delay (insn) <= 3
&& check_live (insn, bb_src)
&& is_exception_free (insn, bb_src, target_bb))))
{
rtx next;
@ -5885,7 +5884,8 @@ schedule_block (bb, rgn_n_insns)
speculative insn, NEXT might otherwise be a note. */
next = next_nonnote_insn (insn);
if (INSN_DEP_COUNT (insn) == 0
&& (SCHED_GROUP_P (next) == 0
&& (! next
|| SCHED_GROUP_P (next) == 0
|| GET_RTX_CLASS (GET_CODE (next)) != 'i'))
ready[n_ready++] = insn;
}
@ -6226,10 +6226,10 @@ add_branch_dependences (head, tail)
rtx insn, last;
/* For all branches, calls, uses, and cc0 setters, force them to remain
in order at the end of the block by adding dependencies and giving
the last a high priority. There may be notes present, and prev_head
may also be a note.
/* For all branches, calls, uses, clobbers, and cc0 setters, force them
to remain in order at the end of the block by adding dependencies and
giving the last a high priority. There may be notes present, and
prev_head may also be a note.
Branches must obviously remain at the end. Calls should remain at the
end since moving them results in worse register allocation. Uses remain
@ -6237,9 +6237,11 @@ add_branch_dependences (head, tail)
at the end because they can't be moved away from their cc0 user. */
insn = tail;
last = 0;
while (GET_CODE (insn) == CALL_INSN || GET_CODE (insn) == JUMP_INSN
while (GET_CODE (insn) == CALL_INSN
|| GET_CODE (insn) == JUMP_INSN
|| (GET_CODE (insn) == INSN
&& (GET_CODE (PATTERN (insn)) == USE
|| GET_CODE (PATTERN (insn)) == CLOBBER
#ifdef HAVE_cc0
|| sets_cc0_p (PATTERN (insn))
#endif