On Wednesday, June 22, 2016 2:44:21 PM CEST Tomas Winkler wrote:
> >
> > There are more than 20 files that have the statement: case cpu_to_...
> > Sparse complains about: case __builtin_bswap, not about
> > __builtin_constant_p.
>
> There is even much more in the header files used in initializers,
> which also require constants. I wonder if __builtin_bswap produces
> constant expression correctly under gcc?
In gcc-4.8 or later yes. gcc-4.6/4.7 on powerpc was a special case that we
have worked around now, as the 16-bit byteswap there was not a constant
expression, unlike the 32-bit and 64-bit ones.
Arnd
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