rs6000: add V1TI into vector comparison expand [PR103316]

rs6000: add V1TI into vector comparison expand [PR103316]

This patch adds V1TI mode into a new mode iterator used in vector comparison,shift and rotation expands.  It also merges some vector comparison, shift and rotation expands for V1T1 and other vector integer modes as they have the similar patterns.  The expands for V1TI only are removed.

gcc/
	PR target/103316
	* config/rs6000/rs6000-builtin.cc (rs6000_gimple_fold_builtin): Enable
	gimple folding for RS6000_BIF_VCMPEQUT, RS6000_BIF_VCMPNET,
	RS6000_BIF_CMPGE_1TI, RS6000_BIF_CMPGE_U1TI, RS6000_BIF_VCMPGTUT,
	RS6000_BIF_VCMPGTST, RS6000_BIF_CMPLE_1TI, RS6000_BIF_CMPLE_U1TI.
	* config/rs6000/vector.md (VEC_IC): New mode iterator.  Add support
	for new Power10 V1TI instructions.
	(vec_cmp<mode><mode>): Set mode iterator to VEC_IC.
	(vec_cmpu<mode><mode>): Likewise.
	(vector_nlt<mode>): Set mode iterator to VEC_IC.
	(vector_nltv1ti): Remove.
	(vector_gtu<mode>): Set mode iterator to VEC_IC.
	(vector_gtuv1ti): Remove.
	(vector_nltu<mode>): Set mode iterator to VEC_IC.
	(vector_nltuv1ti): Remove.
	(vector_geu<mode>): Set mode iterator to VEC_IC.
	(vector_ngt<mode>): Likewise.
	(vector_ngtv1ti): Remove.
	(vector_ngtu<mode>): Set mode iterator to VEC_IC.
	(vector_ngtuv1ti): Remove.
	(vector_gtu_<mode>_p): Set mode iterator to VEC_IC.
	(vector_gtu_v1ti_p): Remove.
	(vrotl<mode>3): Set mode iterator to VEC_IC.  Emit insns for V1TI.
	(vrotlv1ti3): Remove.
	(vashr<mode>3): Set mode iterator to VEC_IC.  Emit insns for V1TI.
	(vashrv1ti3): Remove.

gcc/testsuite/
	PR target/103316
	* gcc.target/powerpc/pr103316.c: New.
	* gcc.target/powerpc/fold-vec-cmp-int128.c: New.