middle-end: Refactor and expose some vectorizer helper functions.

This is a small refactoring which exposes some helper functions in the
vectorizer so they can be used in other places.

gcc/ChangeLog:

	* tree-vect-patterns.c (vect_mark_pattern_stmts): Remove static inline.
	* tree-vect-slp.c (vect_create_new_slp_node): Remove static and only
	set smts if valid.
	* tree-vectorizer.c (vec_info::add_pattern_stmt): New.
	(vec_info::set_vinfo_for_stmt): Optionally enforce read-only.
	* tree-vectorizer.h (struct _slp_tree): Use new types.
	(lane_permutation_t, lane_permutation_t): New.
	(vect_create_new_slp_node, vect_mark_pattern_stmts): New.

1 files changed, 15 insertions, 2 deletions

diff --git a/gcc/tree-vectorizer.c b/gcc/tree-vectorizer.c
index f9e2642..3992849 100644
--- a/gcc/tree-vectorizer.c
+++ b/gcc/tree-vectorizer.c
@@ -525,6 +525,19 @@ vec_info::add_stmt (gimple *stmt)
   return res;
 }
 
+/* Record that STMT belongs to the vectorizable region.  Create a new
+   stmt_vec_info and mark VECINFO as being related and return the new
+   stmt_vec_info.  */
+
+stmt_vec_info
+vec_info::add_pattern_stmt (gimple *stmt, stmt_vec_info stmt_info)
+{
+  stmt_vec_info res = new_stmt_vec_info (stmt);
+  set_vinfo_for_stmt (stmt, res, false);
+  STMT_VINFO_RELATED_STMT (res) = stmt_info;
+  return res;
+}
+
 /* If STMT has an associated stmt_vec_info, return that vec_info, otherwise
    return null.  It is safe to call this function on any statement, even if
    it might not be part of the vectorizable region.  */
@@ -702,12 +715,12 @@ vec_info::new_stmt_vec_info (gimple *stmt)
 /* Associate STMT with INFO.  */
 
 void
-vec_info::set_vinfo_for_stmt (gimple *stmt, stmt_vec_info info)
+vec_info::set_vinfo_for_stmt (gimple *stmt, stmt_vec_info info, bool check_ro)
 {
   unsigned int uid = gimple_uid (stmt);
   if (uid == 0)
     {
-      gcc_assert (!stmt_vec_info_ro);
+      gcc_assert (!check_ro || !stmt_vec_info_ro);
       gcc_checking_assert (info);
       uid = stmt_vec_infos.length () + 1;
       gimple_set_uid (stmt, uid);