[PATCH] Fix vectorizable_store memory leaks (PR middle-end/56461)

[Jakub Jelinek]

Hi!

The first two hunks are similar issue to what I've posted for
vect_permute_load_chain two days ago, the remaining issue is that
if ncopies > 1, we'd leak the result_chain vector too.

Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for
trunk?

2013-03-01  Jakub Jelinek  <ja...@redhat.com>

        PR middle-end/56461
        * tree-vect-data-refs.c (vect_permute_store_chain): Avoid using copy
        method on dr_chain and result_chain.
        * tree-vect-stmts.c (vectorizable_store): Only call
        result_chain.create if j == 0.

--- gcc/tree-vect-data-refs.c.jj        2013-02-27 23:05:57.000000000 +0100
+++ gcc/tree-vect-data-refs.c   2013-03-01 17:41:12.296992793 +0100
@@ -4218,7 +4218,9 @@ vect_permute_store_chain (vec<tree> dr_c
   unsigned int j, nelt = TYPE_VECTOR_SUBPARTS (vectype);
   unsigned char *sel = XALLOCAVEC (unsigned char, nelt);
 
-  *result_chain = dr_chain.copy ();
+  result_chain->quick_grow (length);
+  memcpy (result_chain->address (), dr_chain.address (),
+         length * sizeof (tree));
 
   for (i = 0, n = nelt / 2; i < n; i++)
     {
@@ -4259,7 +4261,8 @@ vect_permute_store_chain (vec<tree> dr_c
          vect_finish_stmt_generation (stmt, perm_stmt, gsi);
          (*result_chain)[2*j+1] = low;
        }
-      dr_chain = result_chain->copy ();
+      memcpy (dr_chain.address (), result_chain->address (),
+             length * sizeof (tree));
     }
 }
 
--- gcc/tree-vect-stmts.c.jj    2013-03-01 13:33:37.000000000 +0100
+++ gcc/tree-vect-stmts.c       2013-03-01 17:35:17.146958118 +0100
@@ -4135,7 +4135,8 @@ vectorizable_store (gimple stmt, gimple_
          new_stmt = NULL;
          if (grouped_store)
            {
-             result_chain.create (group_size);
+             if (j == 0)
+               result_chain.create (group_size);
              /* Permute.  */
              vect_permute_store_chain (dr_chain, group_size, stmt, gsi,
                                        &result_chain);

        Jakub