[PATCH: PR/40416] stop sinking expression if the target bb post dominates from bb

[Ian Lance Taylor]

Carrot Wei <carrot@google.com> writes:

> ChangeLog:
> 2009-06-18  Carrot Wei  <carrot@google.com>
>
>         PR/40416
>         * tree-ssa-sink.c: stop sinking expression if the target bb post
>         dominates from bb.
>         * config/i386/i386.c: check existance of base register before using it.
>         * testsuite/gcc.dg/tree-ssa/ssa-sink-5.c: new test case.

ChangeLog entries should say the function they are changing.  They
should be capitalized as complete sentences.  See many existing
examples, or
http://www.gnu.org/prep/standards/html_node/Change-Logs.html .

The testsuite change should go in testsuite/ChangeLog, and therefore
should not start with "testsuite/".

Ian