On 08/11/14 07:49, Ilya Tocar wrote:
Hi,
I've observed SPEC2006 failure on avx512-vlbwdq branch.
It was caused by hardreg_cprop. In maybe_mode_change it was
assumed, that all values of the same register class and same mode.
are ok. This is not the case for i386/avx512. We need to honor
HARD_REGNO_MODE_OK.
Patch bellow does it.
Ok for trunk?
2014-08-11 Ilya Tocar <ilya.to...@intel.com>
* regcprop.c (maybe_mode_change): Honor HARD_REGNO_MODE_OK.
One could argue that having a class where some members are OK for being
used in a particular mode, but other members are not is the core issue
here.
Can you describe a bit about why you've got a class of that nature?
Background on that would be useful.
jeff
