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Fix solaris2 loop-2d.c failure reported by Manfred Hollstein.

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* haifa-sched.c (build_control_flow): Set unreachable for block whose
	only predecessor is itself.

From-SVN: r19021
This commit is contained in:
Jim Wilson 1998-04-06 17:50:13 +00:00 committed by Jim Wilson
parent 944fc8abef
commit a8afd67b01
2 changed files with 9 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Mon Apr 6 17:23:41 1998 Jim Wilson <wilson@cygnus.com>
* haifa-sched.c (build_control_flow): Set unreachable for block whose
only predecessor is itself.
Mon Apr 6 16:08:04 1998 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* c-parse.in: Include system.h, and remove stuff now made redundant.

5
gcc/haifa-sched.c
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@ -1220,7 +1220,10 @@ build_control_flow ()
for (i = 0; i < n_basic_blocks; i++)
{
nr_edges += num_succs[i];
if (num_preds[i] == 0)
/* ??? We must also detect unreachable loops here. We only handle the
trivial case of a loop with one basic block for now. */
if (num_preds[i] == 0
|| (num_preds[i] == 1 && INT_LIST_VAL (s_preds[i]) == i))
unreachable = 1;
}