On Sun, May 20, 2012 at 10:04:26AM -0700, H.J. Lu wrote:
> rdrand<mode>_1 must be marked with unspec_volatile since it returns
> a different value every time. OK for trunk, 4.7 and 4.6?
A testcase for this would be nice (runtime is not possible, since the
RNG in theory could return the same value twice, but scanning assembly
for a particular number of the rdrand insns would be nice).
> PR target/53416
> * config/i386/i386.md (UNSPEC_RDRAND): Renamed to ...
> (UNSPECV_RDRAND): This.
> (rdrand<mode>_1): Updated.
Jakub
