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| author | Jim Wilson <wilson@cygnus.com> | 1998-04-06 17:50:13 +0000 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1998-04-06 10:50:13 -0700 |
| commit | a8afd67b0172b66bb0c08d798054eb409adce196 (patch) | |
| tree | 0f7ad6186fa4f88868060b2e61cebcb3eeb9d421 /gcc/haifa-sched.c | |
| parent | 944fc8abefc438b7087db07cdf81c1bbcb0faf26 (diff) | |
| download | gcc-a8afd67b0172b66bb0c08d798054eb409adce196.zip gcc-a8afd67b0172b66bb0c08d798054eb409adce196.tar.gz gcc-a8afd67b0172b66bb0c08d798054eb409adce196.tar.bz2 | |
Fix solaris2 loop-2d.c failure reported by Manfred Hollstein.
* haifa-sched.c (build_control_flow): Set unreachable for block whose
only predecessor is itself.
From-SVN: r19021
Diffstat (limited to 'gcc/haifa-sched.c')
| -rw-r--r-- | gcc/haifa-sched.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/haifa-sched.c b/gcc/haifa-sched.c index 43e5264..9b7c0d4 100644 --- a/gcc/haifa-sched.c +++ b/gcc/haifa-sched.c @@ -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; } |