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haifa-sched.c (add_branch_dependences): Make each insn in a SCHED_GROUP_P block explicitly depend on the previous insn.

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* haifa-sched.c (add_branch_dependences): Make each insn in
        a SCHED_GROUP_P block explicitly depend on the previous insn.
Fixes x86 abort.

From-SVN: r15430
This commit is contained in:
Jeffrey A Law 1997-09-13 19:00:22 +00:00 committed by Jeff Law
parent 0520f6c01a
commit 326ee7a3fe
2 changed files with 15 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Sat Sep 13 12:57:26 1997 Jeffrey A Law (law@cygnus.com)
* haifa-sched.c (add_branch_dependences): Make each insn in
a SCHED_GROUP_P block explicitly depend on the previous insn.
Thu Sep 11 17:43:55 1997 Jim Wilson <wilson@cygnus.com>
* configure.in (native_prefix): Delete.

12
gcc/haifa-sched.c
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@ -7106,9 +7106,17 @@ add_branch_dependences (head, tail)
CANT_MOVE (insn) = 1;
last = insn;
/* Skip over insns that are part of a group. */
/* Skip over insns that are part of a group.
Make each insn explicitly depend on the previous insn.
This ensures that only the group header will ever enter
the ready queue (and, when scheduled, will automatically
schedule the SCHED_GROUP_P block). */
while (SCHED_GROUP_P (insn))
insn = prev_nonnote_insn (insn);
{
rtx temp = prev_nonnote_insn (insn);
add_dependence (insn, temp, REG_DEP_ANTI);
insn = temp;
}
}
/* Don't overrun the bounds of the basic block. */