re PR target/62011 (False Data Dependency in popcnt instruction)

re PR target/62011 (False Data Dependency in popcnt instruction)

	PR target/62011
	* config/i386/x86-tune.def (X86_TUNE_AVOID_FALSE_DEP_FOR_BMI):
	New tune flag.
	* config/i386/i386.h (TARGET_AVOID_FALSE_DEP_FOR_BMI): New define.
	* config/i386/i386.md (unspec) <UNSPEC_INSN_FALSE_DEP>: New unspec.
	(ffs<mode>2): Do not expand with tzcnt for
	TARGET_AVOID_FALSE_DEP_FOR_BMI.
	(ffssi2_no_cmove): Ditto.
	(*tzcnt<mode>_1): Disable for TARGET_AVOID_FALSE_DEP_FOR_BMI.
	(ctz<mode>2): New expander.
	(*ctz<mode>2_falsedep_1): New insn_and_split pattern.
	(*ctz<mode>2_falsedep): New insn.
	(*ctz<mode>2): Rename from ctz<mode>2.
	(clz<mode>2_lzcnt): New expander.
	(*clz<mode>2_lzcnt_falsedep_1): New insn_and_split pattern.
	(*clz<mode>2_lzcnt_falsedep): New insn.
	(*clz<mode>2): Rename from ctz<mode>2.
	(popcount<mode>2): New expander.
	(*popcount<mode>2_falsedep_1): New insn_and_split pattern.
	(*popcount<mode>2_falsedep): New insn.
	(*popcount<mode>2): Rename from ctz<mode>2.
	(*popcount<mode>2_cmp): Remove.
	(*popcountsi2_cmp_zext): Ditto.

From-SVN: r214112