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| author | rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-03-22 22:08:53 +0000 |
|---|---|---|
| committer | rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-03-22 22:08:53 +0000 |
| commit | a1b673caf38af231b55ce4d3c2e1c36ab2af5891 (patch) | |
| tree | 5448de2804cc76994e55daf1afdcd5fa16c6bbf3 /gcc/tree-ssa-loop-ivopts.c | |
| parent | 4dd3972ff66dfc20923ded41554dbb74b609637d (diff) | |
| download | gcc-a1b673caf38af231b55ce4d3c2e1c36ab2af5891.tar.gz | |
* tree-ssa-loop-ivopts.c (determine_iv_cost): Do not try to preserve
artificial original candidates.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@96894 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-loop-ivopts.c')
| -rw-r--r-- | gcc/tree-ssa-loop-ivopts.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c index 877f5e45a03..2544fbc966a 100644 --- a/gcc/tree-ssa-loop-ivopts.c +++ b/gcc/tree-ssa-loop-ivopts.c @@ -3681,8 +3681,11 @@ determine_iv_cost (struct ivopts_data *data, struct iv_cand *cand) cand->cost = cost_step + cost_base / AVG_LOOP_NITER (current_loop); - /* Prefer the original iv unless we may gain something by replacing it. */ - if (cand->pos == IP_ORIGINAL) + /* Prefer the original iv unless we may gain something by replacing it; + this is not really relevant for artificial ivs created by other + passes. */ + if (cand->pos == IP_ORIGINAL + && !DECL_ARTIFICIAL (SSA_NAME_VAR (cand->var_before))) cand->cost--; /* Prefer not to insert statements into latch unless there are some |