testsuite/
* lib/target-supports.exp (add_options_for_arm_v8_1a_neon): Update
comment. Use check_effective_target_arm_v8_1a_neon_ok to select
the command line options.
(check_effective_target_arm_v8_1a_neon_ok_nocache): Update initial
test to allow ARM targets. Select and record a working set of
command line options.
(check_effective_target_arm_v8_1a_neon_hw): Add tests for ARM
targets.
gcc/
* doc/sourcebuild.texi (ARM-specific attributes): Add
"arm_v8_1a_neon_ok" and "arm_v8_1a_neon_hw".
From-SVN: r231683
