Messages in this thread | | | Subject | Re: [PATCH] likely cleanup: remove unlikely for kfree(NULL) | From | Arjan van de Ven <> | Date | Wed, 26 Apr 2006 12:08:37 +0200 |
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On Wed, 2006-04-26 at 12:05 +0200, Jörn Engel wrote: > On Wed, 26 April 2006 10:27:18 +0200, Arjan van de Ven wrote: > > > > what I would like is kfree to become an inline wrapper that does the > > null check inline, that way gcc can optimize it out (and it will in 4.1 > > with the VRP pass) if gcc can prove it's not NULL. > > How well can gcc optimize this case?
if you deref'd the pointer it'll optimize it away (assuming a new enough gcc, like 4.1)
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