re PR target/81015 (Bad codegen for __builtin_clz(unsigned short))

re PR target/81015 (Bad codegen for __builtin_clz(unsigned short))

	PR target/81015
	Revert:
	2016-12-14  Uros Bizjak  <ubizjak@gmail.com>

	PR target/59874
	* config/i386/i386.md (*ctzhi2): New insn_and_split pattern.
	(*clzhi2): Ditto.

testsuite/ChangeLog:

	PR target/81015
	* gcc.target/i386/pr59874-1.c (foo): Call __builtin_ctzs.
	* gcc.target/i386/pr59874-2.c (foo): Call __builtin_clzs.
	* gcc.target/i386/pr81015.c: New test.

From-SVN: r249028