Messages in this thread | | | Date | Mon, 18 Jun 2007 10:07:21 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: [PATCH] trivial: the memset operation on a automatic array variable should be optimized out by data initialization |
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Denis Cheng wrote: > From: Denis Cheng <crquan@gmail.com> > > the explicit memset call could be optimized out by data initialization, > thus all the fill working can be done by the compiler implicitly. >
How does the generated code change? Does gcc do something stupid like statically allocate a prototype structure full of zeros, and then memcpy it in? Or does it generate a series of explicit assignments for each member? Or does it generate a memset anyway?
Seems to me that this gives gcc the opportunity to be more stupid, and the only right answer is what we're doing anyway.
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