backport: sync.md: Update comment about unpredictable LL/SC lock clearing by a taken...

backport: sync.md: Update comment about unpredictable LL/SC lock clearing by a taken branch.

	Backport from mainline:
	2009-08-26  Uros Bizjak  <ubizjak@gmail.com>

	* config/alpha/sync.md: Update comment about unpredictable LL/SC lock
	clearing by a taken branch.
	(sync_<fetchop_name><mode>): Split when epilogue_completed is set,
	effectively after bbro pass.
	(sync_nand<mode>): Ditto.
	(sync_old_<fetchop_name><mode>): Ditto.
	(sync_old_nand<mode>): Ditto.
	(sync_new_<fetchop_name><mode>): Dito.
	(sync_new_nand<mode>): Ditto.
	(sync_compare_and_swap<mode>_1): Ditto.
	(*sync_compare_and_swap<mode>): Ditto.
	(sync_lock_test_and_set<mode>_1): Ditto.
	("sync_lock_test_and_set<mode>): Ditto.

	2009-08-25  Uros Bizjak  <ubizjak@gmail.com>

	* config/alpha/alpha.md (*cmpdf_ieee_ext[123]): Remove.
	(*cmpdf_internal): Enable for all ALPHA_FPTM levels.
	(*movdfcc_ext[1234]): Disable for IEEE mode.

	2009-08-16  Uros Bizjak  <ubizjak@gmail.com>

	* config/alpha/alpha.c (alpha_end_function): Handle NULL_RTX returned
	from prev_active_insn.

testsuite/ChangeLog:

	Backport from mainline:
	2009-08-17  Uros Bizjak  <ubizjak@gmail.com>

	* lib/target-supports.exp
	(check_effective_target_vect_cmdline_needed): Add alpha to the list
	of targets that do not need command line argument to enable SIMD.

From-SVN: r151160