* 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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@118732
138bc75d-0d04-0410-961f-
82ee72b054a4
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
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))
edge e;
unsigned i;
-
FOR_EACH_IMM_USE_STMT (stmt, imm_iter, name)
{
FOR_EACH_IMM_USE_ON_STMT (use, imm_iter)
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);
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. */