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| author | Bin Cheng <bin.cheng@arm.com> | 2017-11-20 14:20:08 +0000 |
|---|---|---|
| committer | Bin Cheng <amker@gcc.gnu.org> | 2017-11-20 14:20:08 +0000 |
| commit | 9cdcebf971e71e69a773d729b97cfb55652cca31 (patch) | |
| tree | 9ce904293837925904cc45a82747acaecf2be5be /gcc/expmed.c | |
| parent | 90ef577378e880769532ef1f68d7d3da4c2661e7 (diff) | |
| download | gcc-9cdcebf971e71e69a773d729b97cfb55652cca31.zip gcc-9cdcebf971e71e69a773d729b97cfb55652cca31.tar.gz gcc-9cdcebf971e71e69a773d729b97cfb55652cca31.tar.bz2 | |
tree-predcom.c: Add general comment on Store-Store chains.
* tree-predcom.c: Add general comment on Store-Store chains.
(split_data_refs_to_components): Postpone clearing eliminate_store_p
flag in component.
(get_chain_last_ref_at): Rename into...
(get_chain_last_write_at): ...this.
(get_chain_last_write_before_load): New function.
(add_ref_to_chain): Promote type of chain from CT_STORE_LOAD to
CT_STORE_STORE when write reference is added.
(determine_roots_comp): Support load ref in CT_STORE_STORE chains.
(is_inv_store_elimination_chain): Update get_chain_last_write_at call.
(initialize_root_vars_store_elim_1): Ditto.
(initialize_root_vars_store_elim_2): Ditto. Replace rhs once default
definition is created.
(execute_pred_commoning_chain): Support load ref in CT_STORE_STORE
chain by replacing it with dominant stored value.
gcc/testsuite
* gcc.dg/tree-ssa/predcom-dse-12.c: New test.
From-SVN: r254956
Diffstat (limited to 'gcc/expmed.c')
0 files changed, 0 insertions, 0 deletions