2016-07-14  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    PR rtl-optimization/71878
    * lra-constraints.c (match_reload): Pass information about other
    output operands.  Create new unique register value if matching input
    operand shares same register value as output operand being considered.
    (curr_insn_transform): Record output operands already processed.

From-SVN: r238346