gcc/ChangeLog:

2015-07-12  Kugan Vivekanandarajah  <kuganv@linaro.org>

	* cse.c (cse_insn): Calculate src_eqv for ZERO_EXTRACT.
	* emit-rtl.c (set_for_reg_notes): Allow ZERO_EXTRACT to set
	REG_EQUAL note.

From-SVN: r225721