re PR target/87214 (r263772 miscompiled 520.omnetpp_r in SPEC CPU 2017)

re PR target/87214 (r263772 miscompiled 520.omnetpp_r in SPEC CPU 2017)

	PR target/87214
	* config/i386/sse.md
	(<mask_codefor>avx512dq_shuf_<shuffletype>64x2_1<mask_name>,
	avx512f_shuf_<shuffletype>64x2_1<mask_name>): Ensure the
	first constants in pairs are multiples of 2.  Formatting fixes.
	(avx512vl_shuf_<shuffletype>32x4_1<mask_name>,
	avx512vl_shuf_<shuffletype>32x4_1<mask_name>): Ensure the
	first constants in each quadruple are multiples of 4.  Formatting fixes.

	* gcc.target/i386/avx512vl-pr87214-1.c: New test.
	* gcc.target/i386/avx512vl-pr87214-2.c: New test.

From-SVN: r268310