Hi,

Conditions checked for ARM targets in vector-related effective targets
are inconsistent:

* sometimes arm*-*-* is checked
* sometimes Neon is checked
* sometimes arm_neon_ok and sometimes arm_neon is used for neon check
* sometimes check_effective_target_* is used, sometimes is-effective-target

This patch consolidate all of these check into using is-effective-target
arm_neon and when little endian was checked, the check is kept.

ChangeLog entry is as follows:

*** gcc/testsuite/ChangeLog ***

2017-06-06  Thomas Preud'homme  <thomas.preudhomme@arm.com>

	* lib/target-supports.exp (check_effective_target_vect_int): Replace
	current ARM check by ARM NEON's availability check.
	(check_effective_target_vect_intfloat_cvt): Likewise.
	(check_effective_target_vect_uintfloat_cvt): Likewise.
	(check_effective_target_vect_floatint_cvt): Likewise.
	(check_effective_target_vect_floatuint_cvt): Likewise.
	(check_effective_target_vect_shift): Likewise.
	(check_effective_target_whole_vector_shift): Likewise.
	(check_effective_target_vect_bswap): Likewise.
	(check_effective_target_vect_shift_char): Likewise.
	(check_effective_target_vect_long): Likewise.
	(check_effective_target_vect_float): Likewise.
	(check_effective_target_vect_perm): Likewise.
	(check_effective_target_vect_perm_byte): Likewise.
	(check_effective_target_vect_perm_short): Likewise.
	(check_effective_target_vect_widen_sum_hi_to_si_pattern): Likewise.
	(check_effective_target_vect_widen_sum_qi_to_hi): Likewise.
	(check_effective_target_vect_widen_mult_qi_to_hi): Likewise.
	(check_effective_target_vect_widen_mult_hi_to_si): Likewise.
	(check_effective_target_vect_widen_mult_qi_to_hi_pattern): Likewise.
	(check_effective_target_vect_widen_mult_hi_to_si_pattern): Likewise.
	(check_effective_target_vect_widen_shift): Likewise.
	(check_effective_target_vect_extract_even_odd): Likewise.
	(check_effective_target_vect_interleave): Likewise.
	(check_effective_target_vect_multiple_sizes): Likewise.
	(check_effective_target_vect64): Likewise.
	(check_effective_target_vect_max_reduc): Likewise.

Testing: Testsuite shows no regression when targeting ARMv7-A with 
-mfpu=neon-fpv4 and -mfloat-abi=hard or when targeting Cortex-M3 with default 
FPU and float ABI (soft).

Is this ok for trunk?

Best regards,

Thomas