tree-vect-stmts.c (vectorizable_load): Allocate and free dr_chain within the per-copy loop.

gcc/
	* tree-vect-stmts.c (vectorizable_load): Allocate and free dr_chain
	within the per-copy loop.

From-SVN: r172422

gcc/ChangeLog

 2011-04-14  Richard Sandiford  <richard.sandiford@linaro.org>
 
+	* tree-vect-stmts.c (vectorizable_load): Allocate and free dr_chain
+	within the per-copy loop.
+
+2011-04-14  Richard Sandiford  <richard.sandiford@linaro.org>
+
 	* tree-vect-stmts.c (vectorizable_load): Print the number of copies
 	in the dump file.
 

gcc/tree-vect-stmts.c

@@ -3961,8 +3961,6 @@ vectorizable_load (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
     	}
       else
 	vec_num = group_size;
-
-      dr_chain = VEC_alloc (tree, heap, vec_num);
     }
   else
     {
@@ -4116,6 +4114,9 @@ vectorizable_load (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
         dataref_ptr =
 		bump_vector_ptr (dataref_ptr, ptr_incr, gsi, stmt, NULL_TREE);
 
+      if (strided_load || slp_perm)
+	dr_chain = VEC_alloc (tree, heap, vec_num);
+
       for (i = 0; i < vec_num; i++)
 	{
 	  if (i > 0)
@@ -4325,8 +4326,6 @@ vectorizable_load (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
 	        return false;
 
 	      *vec_stmt = STMT_VINFO_VEC_STMT (stmt_info);
-              VEC_free (tree, heap, dr_chain);
-	      dr_chain = VEC_alloc (tree, heap, group_size);
 	    }
           else
 	    {
@@ -4337,11 +4336,10 @@ vectorizable_load (gimple stmt, gimple_stmt_iterator *gsi, gimple *vec_stmt,
 	      prev_stmt_info = vinfo_for_stmt (new_stmt);
 	    }
         }
+      if (dr_chain)
+	VEC_free (tree, heap, dr_chain);
     }
 
-  if (dr_chain)
-    VEC_free (tree, heap, dr_chain);
-
   return true;
 }