diff options
| author | Jakub Jelinek <jakub@redhat.com> | 2019-05-06 23:50:14 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2019-05-06 23:50:14 +0200 |
| commit | 3afd514bca6ea572e614b5289c4429ace693311b (patch) | |
| tree | 6cf0ff6dfc80988456a14b05c7a9b0581f0a685d /gcc/params.def | |
| parent | 839c480a14f025bdcd73a53d14a19d4cc9a1aea5 (diff) | |
| download | gcc-3afd514bca6ea572e614b5289c4429ace693311b.zip gcc-3afd514bca6ea572e614b5289c4429ace693311b.tar.gz gcc-3afd514bca6ea572e614b5289c4429ace693311b.tar.bz2 | |
re PR tree-optimization/88709 (Improve store-merging)
PR tree-optimization/88709
PR tree-optimization/90271
* params.def (PARAM_STORE_MERGING_MAX_SIZE): New parameter.
* gimple-ssa-store-merging.c (encode_tree_to_bitpos): Handle
non-clobber CONSTRUCTORs with no elts. Remove useless tmp_int
variable.
(imm_store_chain_info::coalesce_immediate_stores): Punt if the size
of the store merging group is larger than
PARAM_STORE_MERGING_MAX_SIZE parameter.
(split_group): Add bzero_first argument. If set, always emit first
the first store which must be = {} of the whole area and then for the
rest of the stores consider all zero bytes as paddings.
(imm_store_chain_info::output_merged_store): Check if first store
is = {} of the whole area and if yes, determine which setting of
bzero_first for split_group gives smaller number of stores. Adjust
split_group callers.
(lhs_valid_for_store_merging_p): Allow decls.
(rhs_valid_for_store_merging_p): Allow non-clobber CONTRUCTORs with
no elts.
(pass_store_merging::process_store): Likewise.
* gcc.dg/store_merging_26.c: New test.
* gcc.dg/store_merging_27.c: New test.
* gcc.dg/store_merging_28.c: New test.
* gcc.dg/store_merging_29.c: New test.
From-SVN: r270924
Diffstat (limited to 'gcc/params.def')
| -rw-r--r-- | gcc/params.def | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/params.def b/gcc/params.def index 3c9c5fc..904b3cb 100644 --- a/gcc/params.def +++ b/gcc/params.def @@ -1205,6 +1205,11 @@ DEFPARAM (PARAM_MAX_STORES_TO_MERGE, "store merging pass.", 64, 2, 0) +DEFPARAM (PARAM_STORE_MERGING_MAX_SIZE, + "store-merging-max-size", + "Maximum size of a single store merging region in bytes.", + 65536, 1, 1) + DEFPARAM (PARAM_MAX_TAIL_MERGE_ITERATIONS, "max-tail-merge-iterations", "Maximum amount of iterations of the pass over a function.", |