PR testsuite/39790
	* lib/target-supports.exp (check_effective_target_tls): Remove
	comment of caching.
	(check_effective_target_tls_native): Likewise.
	(check_effective_target_tls_runtime): Likewise.
	* gcc.dg/tls/alias-1.c (dg-require-effective-target): Change target
	tls to tls_runtime.
	* gcc.dg/tls/opt-2.c: Add dg-require-effective-target tls_runtime.

From-SVN: r146913