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| author | Richard Guenther <rguenther@suse.de> | 2012-02-06 13:43:03 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2012-02-06 13:43:03 +0000 |
| commit | 1d30a09a480a436248a9f86c933e8b9c71cc0b46 (patch) | |
| tree | 3938522d24357ea2d1157b4eae263d988be9e9cf | |
| parent | 2c8b5d61bc629ae4468fc9a6cc717b2f0e5032f8 (diff) | |
| download | gcc-1d30a09a480a436248a9f86c933e8b9c71cc0b46.zip gcc-1d30a09a480a436248a9f86c933e8b9c71cc0b46.tar.gz gcc-1d30a09a480a436248a9f86c933e8b9c71cc0b46.tar.bz2 | |
re PR tree-optimization/50955 (IVopts incorrectly rewrite the address of a global memory access into a local form.)
2012-02-06 Richard Guenther <rguenther@suse.de>
PR tree-optimization/50955
* tree-ssa-loop-ivopts.c (get_computation_cost_at): Artificially
raise cost of expressions that replace an address with an
expression based on a different pointer.
From-SVN: r183934
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/tree-ssa-loop-ivopts.c | 6 |
2 files changed, 12 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7effee6..97ceef1 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2012-02-06 Richard Guenther <rguenther@suse.de> + + PR tree-optimization/50955 + * tree-ssa-loop-ivopts.c (get_computation_cost_at): Artificially + raise cost of expressions that replace an address with an + expression based on a different pointer. + 2012-02-06 Jakub Jelinek <jakub@redhat.com> PR target/52129 diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c index 15a2dd7..10c9352 100644 --- a/gcc/tree-ssa-loop-ivopts.c +++ b/gcc/tree-ssa-loop-ivopts.c @@ -4048,7 +4048,11 @@ get_computation_cost_at (struct ivopts_data *data, return infinite_cost; } - if (address_p) + if (address_p + || (use->iv->base_object + && cand->iv->base_object + && POINTER_TYPE_P (TREE_TYPE (use->iv->base_object)) + && POINTER_TYPE_P (TREE_TYPE (cand->iv->base_object)))) { /* Do not try to express address of an object with computation based on address of a different object. This may cause problems in rtl |