[PATCH] Fix memory leak in vectorizer

[Victor Kaplansky <VICTORK at il dot ibm dot com>]

The attached patch, written together with Ira Rosen, fixes memory leaks in
the
vectorizer, that were found with the help of valgrind and by examining the
code.

Bootstrapped and regtested with vectorization enabled and full testsuite
on x86_64.

Is it O.K. for 4.4?

Thanks,
Victor and Ira

ChangeLog:

      * tree-vectorizer.c (free_stmt_vec_info): New function.
      (destroy_loop_vec_info): Move code to free_stmt_vec_info().
      Call free_stmt_vec_info(). Free LOOP_VINFO_STRIDED_STORES..
      * tree-vectorizer.h (free_stmt_vec_info): Declare.
      * tree-vect-transform.c (vectorizable_conversion): Free
      vec_oprnds0 if it was allocated.
      (vect_permute_store_chain): Remove unused VECs.
      (vectorizable_store): Free VECs that are allocated in the..
      function.
      (vect_transform_strided_load, vectorizable_load): Likewise.
      (vect_remove_stores): Simplify the code.
      (vect_transform_loop): Move code to vect_remove_stores().
      Call vect_remove_stores() and free_stmt_vec_info().

(See attached file: memleaks2.txt)

Attachment: memleaks2.txt
Description: Text document