[AArch64] Rename cmp_result iterator

[AArch64] Rename cmp_result iterator

The comparison results provided by the V_cmp_result/v_cmp_result
attribute were simply the corresponding integer vector.  We'd also
like to have easy access to the integer vector for SVE, but using
"cmp_result" would be confusing because SVE comparisons return
predicates instead of vectors.  This patch therefore renames the
attributes to the more general V_INT_EQUIV/v_int_equiv instead.

As to the capitalisation: there are already many iterators that use
all lowercase vs. all uppercase names to distinguish all lowercase
vs. all uppercase expansions (e.g. fcvt_target and FCVT_TARGET).
It's also the convention used for the built-in mode/MODE/code/CODE/etc.
attributes.  IMO those names are easier to read at a glance, rather than
relying on a single letter's difference.

2017-08-22  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* config/aarch64/iterators.md (V_cmp_result): Rename to...
	(V_INT_EQUIV): ...this.
	(v_cmp_result): Rename to...
	(v_int_equiv): ...this.
	* config/aarch64/aarch64.md (xorsign<mode>3): Update accordingly.
	* config/aarch64/aarch64-simd.md (xorsign<mode>3): Likewise.
	(copysign<mode>3): Likewise.
	(aarch64_simd_bsl<mode>_internal): Likewise.
	(aarch64_simd_bsl<mode>): Likewise.
	(vec_cmp<mode><mode>): Likewise.
	(vcond<mode><mode>): Likewise.
	(vcond<v_cmp_mixed><mode>): Likewise.
	(vcondu<mode><v_cmp_mixed>): Likewise.
	(aarch64_cm<optab><mode>): Likewise.
	(aarch64_cmtst<mode>): Likewise.
	(aarch64_fac<optab><mode>): Likewise.
	(vec_perm_const<mode>): Likewise.
	(vcond_mask_<mode><v_cmp_result>): Rename to...
	(vcond_mask_<mode><v_int_equiv>): ...this.
	(vec_cmp<mode><v_cmp_result>): Rename to...
	(vec_cmp<mode><v_int_equiv>): ...this.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@251556 138bc75d-0d04-0410-961f-82ee72b054a4