[tree-ssa] Remove useless null pointer checks

Jason Merrill jason@redhat.com
Thu Jul 31 17:49:00 GMT 2003


On Thu, 31 Jul 2003 11:15:06 -0600, law@redhat.com wrote:

> 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.

Great.

> 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.

Can you elaborate?

Jason



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