re PR target/84220 (rs6000 builtin __builtin_vec_sld() ICEs on invalid 3rd argument)

re PR target/84220 (rs6000 builtin __builtin_vec_sld() ICEs on invalid 3rd argument)

[gcc]

2018-02-14  Will Schmidt  <will_schmidt@vnet.ibm.com>

	PR target/84220
	* config/rs6000/rs6000-c.c: Update definitions for
	ALTIVEC_BUILTIN_VEC_SLD, ALTIVEC_BUILTIN_VEC_SLDW,
	ALTIVEC_BUILTIN_VEC_XXPERMDI builtins.

[testsuite]

2018-02-14  Will Schmidt  <will_schmidt@vnet.ibm.com>

	PR target/84220
	* gcc.target/powerpc/pr84220-sld.c: New test.
	* gcc.target/powerpc/pr84220-sld2.c: New test.
	* gcc.target/powerpc/pr84220-sldw.c: New test.
	* gcc.target/powerpc/pr84220-xxperm.c: New test.
	* gcc.target/powerpc/pr84220-xxsld.c: New test.

From-SVN: r257662