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| author | Richard Biener <rguenther@suse.de> | 2014-11-24 09:24:26 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2014-11-24 09:24:26 +0000 |
| commit | f3dccf50915b31fcc3e03e82fd09ccef243b30e3 (patch) | |
| tree | 0be6bb876980671d95c871e28f5d9cd9ae32a175 /gcc/tree-ssa-alias.c | |
| parent | 8f901c12f41dd917c47f10cf7ba85e5884b04882 (diff) | |
| download | gcc-f3dccf50915b31fcc3e03e82fd09ccef243b30e3.zip gcc-f3dccf50915b31fcc3e03e82fd09ccef243b30e3.tar.gz gcc-f3dccf50915b31fcc3e03e82fd09ccef243b30e3.tar.bz2 | |
re PR tree-optimization/55334 (mgrid regression (ipa-cp disables vectorization))
2014-11-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/55334
* function.h (struct function): Add last_clique member.
* tree-inline.c (remap_dependence_clique): New function.
(remap_gimple_op_r): Remap dependence cliques in MEM_REFs.
(copy_tree_body_r): Likewise.
(copy_cfg_body): Free dependence map.
(copy_gimple_seq_and_replace_locals): Likewise.
* tree-pretty-print.c (dump_generic_node): Dump
dependence info.
* tree-ssa-alias.c (refs_may_alias_p_1): Use dependence info
to answer alias query.
* tree-ssa-structalias.c: Include tree-phinodes.h, ssa-iterators.h,
tree-pretty-print.h and gimple-walk.h.
(struct variable_info): Add is_restrict_var flag and ruid
member.
(new_var_info): Initialize is_restrict_var.
(make_constraint_from_restrict): Likewise.
(create_variable_info_for): Exclude restricts from global vars
from new handling.
(intra_create_variable_infos): But not those from parameters.
(visit_loadstore): New function.
(maybe_set_dependence_info): Likewise.
(compute_dependence_clique): Likewise.
(compute_may_aliases): Call compute_dependence_clique.
* tree-data-ref.c (dr_analyze_indices): Copy dependence info
to fake MEM_REF.
(dr_may_alias_p): Use recorded dependence info to answer
alias query.
* tree-core.h (struct tree_base): Add clique, base struct in
union.
* tree.h (MR_DEPENDENCE_CLIQUE): New macro.
(MR_DEPENDENCE_BASE): Likewise.
* tree-inline.h (dependence_hasher): New hash-map kind.
(struct copy_body_data): Add dependence_map pointer.
* gimple-fold.c (maybe_canonicalize_mem_ref_addr): Avoid
throwing away dependence info.
* tree-streamer-in.c (unpack_value_fields): Stream dependence info.
* tree-streamer-out.c (streamer_pack_tree_bitfields): Likewise.
* gcc.dg/tree-ssa/restrict-5.c: New testcase.
From-SVN: r218004
Diffstat (limited to 'gcc/tree-ssa-alias.c')
| -rw-r--r-- | gcc/tree-ssa-alias.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index a122898..17e8414 100644 --- a/gcc/tree-ssa-alias.c +++ b/gcc/tree-ssa-alias.c @@ -1384,6 +1384,34 @@ refs_may_alias_p_1 (ao_ref *ref1, ao_ref *ref2, bool tbaa_p) return decl_refs_may_alias_p (ref1->ref, base1, offset1, max_size1, ref2->ref, base2, offset2, max_size2); + /* Handle restrict based accesses. + ??? ao_ref_base strips inner MEM_REF [&decl], recover from that + here. */ + tree rbase1 = base1; + tree rbase2 = base2; + if (var1_p) + { + rbase1 = ref1->ref; + if (rbase1) + while (handled_component_p (rbase1)) + rbase1 = TREE_OPERAND (rbase1, 0); + } + if (var2_p) + { + rbase2 = ref2->ref; + if (rbase2) + while (handled_component_p (rbase2)) + rbase2 = TREE_OPERAND (rbase2, 0); + } + if (rbase1 && rbase2 + && (TREE_CODE (base1) == MEM_REF || TREE_CODE (base1) == TARGET_MEM_REF) + && (TREE_CODE (base2) == MEM_REF || TREE_CODE (base2) == TARGET_MEM_REF) + /* If the accesses are in the same restrict clique... */ + && MR_DEPENDENCE_CLIQUE (base1) == MR_DEPENDENCE_CLIQUE (base2) + /* But based on different pointers they do not alias. */ + && MR_DEPENDENCE_BASE (base1) != MR_DEPENDENCE_BASE (base2)) + return false; + ind1_p = (TREE_CODE (base1) == MEM_REF || TREE_CODE (base1) == TARGET_MEM_REF); ind2_p = (TREE_CODE (base2) == MEM_REF |