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cfgrtl.c (force_nonfallthru_and_redirect): Don't try to redirect the entry block.

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* cfgrtl.c (force_nonfallthru_and_redirect): Don't try to redirect
         the entry block.

From-SVN: r49488
This commit is contained in:
Bernd Schmidt 2002-02-04 19:19:04 +00:00 committed by Bernd Schmidt
parent 72db02bfc3
commit 24c545ff92
2 changed files with 27 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2001-02-04 Bernd Schmidt <bernds@redhat.com>
* cfgrtl.c (force_nonfallthru_and_redirect): Don't try to redirect
the entry block.
2002-02-04 Richard Henderson <rth@redhat.com>
* combine.c (force_to_mode): Remove STACK_BIAS code.

23
gcc/cfgrtl.c
View File

@ -918,7 +918,28 @@ force_nonfallthru_and_redirect (e, target)
abort ();
else if (!(e->flags & EDGE_FALLTHRU))
abort ();
else if (e->src->succ->succ_next)
else if (e->src == ENTRY_BLOCK_PTR)
{
/* We can't redirect the entry block. Create an empty block at the
start of the function which we use to add the new jump. */
edge *pe1;
basic_block bb = create_basic_block (0, e->dest->head, NULL);
/* Change the existing edge's source to be the new block, and add
a new edge from the entry block to the new block. */
e->src = bb;
for (pe1 = &ENTRY_BLOCK_PTR->succ; *pe1; pe1 = &(*pe1)->succ_next)
if (*pe1 == e)
{
*pe1 = e->succ_next;
break;
}
e->succ_next = 0;
bb->succ = e;
make_single_succ_edge (ENTRY_BLOCK_PTR, bb, EDGE_FALLTHRU);
}
if (e->src->succ->succ_next)
{
/* Create the new structures. */
note = last_loop_beg_note (e->src->end);