re PR target/36473 (Generate bit test (bt) instructions)

	PR target/36473
	* config/i386/i386.c (ix86_tune_features) [TUNE_USE_BT]:
	Add m_CORE2 and m_GENERIC.
	* config/i386/predicates.md (bt_comparison_operator): New predicate.
	* config/i386/i386.md (*btdi_rex64): New instruction pattern.
	(*btsi): Ditto.
	(*jcc_btdi_rex64): New instruction and split pattern.
	(*jcc_btsi): Ditto.
	(*jcc_btsi_1): Ditto.
	(*btsq): Fix Intel asm dialect operand order.
	(*btrq): Ditto.
	(*btcq): Ditto.

testsuite/ChangeLog:

	PR target/36473
	* testsuite/gcc.target/i386/bt-1.c: New test.
	* testsuite/gcc.target/i386/bt-2.c: Ditto.

From-SVN: r136615