gcc/

	* tree-vect-stmts.c (vectorizable_store): Only chain one related
	statement per copy.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@172759 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e9b126b..3474847 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 2011-04-20  Richard Sandiford  <richard.sandiford@linaro.org>
 
+       * tree-vect-stmts.c (vectorizable_store): Only chain one related
+       statement per copy.
+
+2011-04-20  Richard Sandiford  <richard.sandiford@linaro.org>
+
        * Makefile.in (INTERNAL_FN_DEF, INTERNAL_FN_H): Define.
        (GIMPLE_H): Include $(INTERNAL_FN_H).
        (OBJS-common): Add internal-fn.o.

diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index 0c7ab5a..879153d 100644 (file)
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -3632,6 +3632,7 @@ vectorizable_store (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
                bump_vector_ptr (dataref_ptr, ptr_incr, gsi, stmt, NULL_TREE);
        }
 
+      new_stmt = NULL;
       if (strided_store)
        {
          result_chain = VEC_alloc (tree, heap, group_size);
@@ -3688,16 +3689,18 @@ vectorizable_store (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
           if (slp)
             continue;
 
-          if (j == 0)
-            STMT_VINFO_VEC_STMT (stmt_info) = *vec_stmt =  new_stmt;
-         else
-           STMT_VINFO_RELATED_STMT (prev_stmt_info) = new_stmt;
-
-         prev_stmt_info = vinfo_for_stmt (new_stmt);
          next_stmt = DR_GROUP_NEXT_DR (vinfo_for_stmt (next_stmt));
          if (!next_stmt)
            break;
        }
+      if (!slp)
+       {
+         if (j == 0)
+           STMT_VINFO_VEC_STMT (stmt_info) = *vec_stmt = new_stmt;
+         else
+           STMT_VINFO_RELATED_STMT (prev_stmt_info) = new_stmt;
+         prev_stmt_info = vinfo_for_stmt (new_stmt);
+       }
     }
 
   VEC_free (tree, heap, dr_chain);