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| author | Zdenek Dvorak <dvorakz@suse.cz> | 2006-11-12 21:59:28 +0100 |
|---|---|---|
| committer | Zdenek Dvorak <rakdver@gcc.gnu.org> | 2006-11-12 20:59:28 +0000 |
| commit | 8f8bb1d2008496ba3856bc12f8b2cae12195c235 (patch) | |
| tree | ef6efd848adb18c3716797fe42c38a08f297a155 /gcc | |
| parent | 4d2280f60db6ea2a50ac3890bb1fd5073d705863 (diff) | |
| download | gcc-8f8bb1d2008496ba3856bc12f8b2cae12195c235.zip gcc-8f8bb1d2008496ba3856bc12f8b2cae12195c235.tar.gz gcc-8f8bb1d2008496ba3856bc12f8b2cae12195c235.tar.bz2 | |
tree-flow.h (name_mappings_registered_p): Declare.
* tree-flow.h (name_mappings_registered_p): Declare.
* tree-into-ssa.c (name_mappings_registered_p): New function.
* tree-cfg.c (tree_can_merge_blocks_p): Check
name_mappings_registered_p instead of need_ssa_update_p.
From-SVN: r118732
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/tree-cfg.c | 7 | ||||
| -rw-r--r-- | gcc/tree-flow.h | 1 | ||||
| -rw-r--r-- | gcc/tree-into-ssa.c | 7 |
4 files changed, 19 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index bf52ce8..22b956f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,12 @@ 2006-11-12 Zdenek Dvorak <dvorakz@suse.cz> + * tree-flow.h (name_mappings_registered_p): Declare. + * tree-into-ssa.c (name_mappings_registered_p): New function. + * tree-cfg.c (tree_can_merge_blocks_p): Check + name_mappings_registered_p instead of need_ssa_update_p. + +2006-11-12 Zdenek Dvorak <dvorakz@suse.cz> + * tree-ssa-loop.c (tree_vectorize): Return the result of vectorize_loops. * tree-vectorizer.c (vectorize_loops): Return TODO_cleanup_cfg diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c index ab5a234..7c397aaa8 100644 --- a/gcc/tree-cfg.c +++ b/gcc/tree-cfg.c @@ -1200,11 +1200,13 @@ tree_can_merge_blocks_p (basic_block a, basic_block b) return false; /* It must be possible to eliminate all phi nodes in B. If ssa form - is not up-to-date, we cannot eliminate any phis. */ + is not up-to-date, we cannot eliminate any phis; however, if only + some symbols as whole are marked for renaming, this is not a problem, + as phi nodes for those symbols are irrelevant in updating anyway. */ phi = phi_nodes (b); if (phi) { - if (need_ssa_update_p ()) + if (name_mappings_registered_p ()) return false; for (; phi; phi = PHI_CHAIN (phi)) @@ -1242,7 +1244,6 @@ replace_uses_by (tree name, tree val) edge e; unsigned i; - FOR_EACH_IMM_USE_STMT (stmt, imm_iter, name) { FOR_EACH_IMM_USE_ON_STMT (use, imm_iter) diff --git a/gcc/tree-flow.h b/gcc/tree-flow.h index 8013804..61910f9 100644 --- a/gcc/tree-flow.h +++ b/gcc/tree-flow.h @@ -716,6 +716,7 @@ void delete_update_ssa (void); void register_new_name_mapping (tree, tree); tree create_new_def_for (tree, tree, def_operand_p); bool need_ssa_update_p (void); +bool name_mappings_registered_p (void); bool name_registered_for_update_p (tree); bitmap ssa_names_to_replace (void); void release_ssa_name_after_update_ssa (tree name); diff --git a/gcc/tree-into-ssa.c b/gcc/tree-into-ssa.c index 14a50b6..3bcddfe 100644 --- a/gcc/tree-into-ssa.c +++ b/gcc/tree-into-ssa.c @@ -2659,6 +2659,13 @@ need_ssa_update_p (void) return syms_to_rename || old_ssa_names || new_ssa_names; } +/* Return true if SSA name mappings have been registered for SSA updating. */ + +bool +name_mappings_registered_p (void) +{ + return repl_tbl && htab_elements (repl_tbl) > 0; +} /* Return true if name N has been registered in the replacement table. */ |