(andqi_ext0, testqi_ext0): Remove unnecesary check.
	(addhi*, addqi*): Simplify "dec" condition.
	(testsi to testqi splitters): Remove TARGET_PROMOTE_QImode check.
	(and, or, xor to QImode splitters): New.
	(iorqi_ext*): New.
	(xorqi_ext_0): New.
	(xorqi_ext_1): Rename to xorqi_ext_2; bring to sync with and versions.
	(andqi_ext_1_rex64): New.
	(ashrqi*_slp): New.
	(ashlqi*_slp): New.
	(lshlqi*_slp): New.
	(rotrqi3*_slp): New.
	(rotlqi3*_slp): New.

From-SVN: r54537