Messages in this thread |  | | Date | Thu, 22 Feb 2007 04:50:39 -0500 | From | Jakub Jelinek <> | Subject | Re: -freg-struct-return? |
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On Thu, Feb 22, 2007 at 12:09:04AM -0800, Jeremy Fitzhardinge wrote: > Arjan van de Ven wrote: > > Do we know how many gcc bugs this has? (regparm used to have many) > > other than that.. sounds like a win... > > > > The documentation suggests that its the preferred mode of operation, and > that its the default on platforms where gcc is the primary compiler. So > the fact that it isn't for Linux suggests either an oversight or that it > is actually broken...
It is used for Linux on many architectures (x86_64, sparc64, ia64, ppc{,64}, arm, sh, m68k to name just a few), but it is an ABI decision, so e.g. on i386 is not used by default as the ABI mandates structs/unions are returned in memory.
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