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Re: [tree-ssa] Remove useless null pointer checks
- From: law at redhat dot com
- To: Jason Merrill <jason at redhat dot com>
- Cc: Jeff Sturm <jsturm at one-point dot com>, gcc-patches at gcc dot gnu dot org
- Date: Thu, 31 Jul 2003 11:15:06 -0600
- Subject: Re: [tree-ssa] Remove useless null pointer checks
- Reply-to: law at redhat dot com
In message <wvl65liaal7.fsf@prospero.boston.redhat.com>, Jason Merrill writes:
>On Wed, 30 Jul 2003 21:18:55 -0600, law@redhat.com wrote:
>
>> However, once we deal with the NOP_EXPR issues in a sane way
>
>FYI, I hope to deal with that today.\
Funny -- I think I've come up with a set of rules for the dominator
optimizer which should make it immune to most of this stuff.
Note that simply removing the typecasts can actually be a step backwards
in terms of exposing stuff to the optimizer. I found that when I
started looking real closely at stripping out unwanted NOP_EXPRs in
the gimplifier.
jeff