[Bug target/49411] [4.6/4.7] ICE: unrecognizable insn with -mxop in _mm_roti_epi8 with negative number

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49411

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-06-15 06:32:20 UTC ---
Created attachment 24533
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24533
gcc47-pr49411.patch

Untested fix.  Alternatively, we could for the rotation instead just always
mask the immediate operand (the only docs I found about these intrinsics was
MSFT documentation which didn't say anything on invalid count, but even said
that the count is preferrably an integer instead of unconditionally an
integer).
Therefore, perhaps we could mask it if it is constant and expand using
rotl<mode>3 expander if it is not CONST_INT.