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

[qneill at gcc dot gnu.org]

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

           Summary: [4.6/4.7] ICE: unrecognizable insn with -mxop in
                    _mm_roti_epi8 with negative number
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: qneill@gcc.gnu.org


Using _mm_roti_epi8 in xopintrin.h with a negative number produces an ICE in
4.6/4.7; the negative number is how you use VPROT[BWDQ] to rotate right, see 
http://support.amd.com/us/Processor_TechDocs/26568.pdf

------ testcase.c ------
#include <x86intrin.h>
void f(void)
{
        __m128 s;
        __m128i d;
        return _mm_roti_epi8(s, -1);
}
------ output ------
$ gcc -mxop -c vprotbi1.c
vprotbi1.c: In function ‘f’:
vprotbi1.c:6:2: warning: ‘return’ with a value, in function returning void
[enabled by default]
vprotbi1.c:7:1: error: unrecognizable insn:
(insn 6 5 7 3 (set (reg:V16QI 60 [ D.8650 ])
        (rotate:V16QI (reg:V16QI 59 [ D.8648 ])
            (const_int -1 [0xffffffffffffffff]))) vprotbi1.c:6 -1
     (nil))
vprotbi1.c:7:1: internal compiler error: in extract_insn, at recog.c:2113
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