[ARM] Rewrite vc<cond> NEON patterns to use RTL operations rather than UNSPECs

[ARM] Rewrite vc<cond> NEON patterns to use RTL operations rather than UNSPECs

	* config/arm/iterators.md (GTGE, GTUGEU, COMPARISONS): New code
	iterators.
	(cmp_op, cmp_type): New code attributes.
	(NEON_VCMP, NEON_VACMP): New int iterators.
	(cmp_op_unsp): New int attribute.
	* config/arm/neon.md (neon_vc<cmp_op><mode>): New define_expand.
	(neon_vceq<mode>): Delete.
	(neon_vc<cmp_op><mode>_insn): New pattern.
	(neon_vc<cmp_op_unsp><mode>_insn_unspec): Likewise.
	(neon_vcgeu<mode>): Delete.
	(neon_vcle<mode>): Likewise.
	(neon_vclt<mode>: Likewise.
	(neon_vcage<mode>): Likewise.
	(neon_vcagt<mode>): Likewise.
	(neon_vca<cmp_op><mode>): New define_expand.
	(neon_vca<cmp_op><mode>_insn): New pattern.
	(neon_vca<cmp_op_unsp><mode>_insn_unspec): Likewise.

	* gcc.target/arm/neon/pr51534.c: Update vcg* scan-assembly patterns
	to look for vcl* where appropriate.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222379 138bc75d-0d04-0410-961f-82ee72b054a4