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regrename.c (copyprop_hardreg_forward): Only search for a previously processed block if...

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* regrename.c (copyprop_hardreg_forward): Only search for a
        previously processed block if the current block only has one
        predecessor.

From-SVN: r90968
This commit is contained in:
Jeff Law 2004-11-20 13:18:49 -07:00 committed by Jeff Law
parent 7afc9b98cf
commit 40806b8b8f
2 changed files with 7 additions and 1 deletions
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gcc/ChangeLog
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@ -1,3 +1,9 @@
2004-11-20 Jeff Law <law@redhat.com>
* regrename.c (copyprop_hardreg_forward): Only search for a
previously processed block if the current block only has one
predecessor.
2004-11-20 Kazu Hirata <kazu@cs.umass.edu>
* tree-ssa-threadupdate.c, tree-vectorizer.c: Fix comment

2
gcc/regrename.c
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@ -1757,7 +1757,7 @@ copyprop_hardreg_forward (void)
processed, begin with the value data that was live at
the end of the predecessor block. */
/* ??? Ought to use more intelligent queuing of blocks. */
if (EDGE_COUNT (bb->preds) > 0)
if (EDGE_COUNT (bb->preds) == 1)
for (bbp = bb; bbp && bbp != EDGE_PRED (bb, 0)->src; bbp = bbp->prev_bb);
if (EDGE_COUNT (bb->preds) == 1
&& ! (EDGE_PRED (bb, 0)->flags & (EDGE_ABNORMAL_CALL | EDGE_EH))