On Sat, Sep 08, 2007 at 12:57:13AM -0500, Gabriel Dos Reis wrote: > Joe Buck <[EMAIL PROTECTED]> writes: > > | On Sep 7, 2007, at 1:53 PM, Martin Jambor wrote: > | > [ giving operator new the malloc property ] > | > | On Fri, Sep 07, 2007 at 06:30:33PM -0700, Chris Lattner wrote: > | > It is unclear whether this is safe. Nothing in the standard AFAIK > | > requires the operator new be implemented in terms of malloc, and > | > users are allowed to override it. > | > | The malloc property doesn't mean that operator new is defined in terms > | of malloc. It refers to the aliasing properties of the returned > | values; specifically, the compiler can assume that two separate calls > | return values that don't alias each other. > > I seem to remember we had had this discussion before -- in connection > with optimizations related to 'malloc' attribute -- and decided not to > apply the attribute because it was not clear whether it was permitted > by the standard. I don't seem to get my hands on reference to the > thread right now. >
There is a related bug: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32748 H.J.
