[Bug tree-optimization/33562] [4.3 Regression] aggregate DSE disabled

[dnovillo at google dot com]

------- Comment #7 from dnovillo at google dot com  2007-09-27 13:48 -------
Subject: Re:  [4.3 Regression] aggregate DSE disabled

On 27 Sep 2007 13:42:11 -0000, rguenth at gcc dot gnu dot org
<gcc-bugzilla@gcc.gnu.org> wrote:

> Diego, it sucks that we need to jump through hoops to get V_MUST_DEF "back".

Unless we can prove that it is impossible to implement DSE any other
way, I would prefer to keep virtual SSA as simple as possible.  It's
meant as a safety net and a "good enough" UD web for passes that do
not care for being too aggressive.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33562