re PR rtl-optimization/64616 (Redundant ldr when accessing var inside and outside a loop)

2015-05-13  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    PR rtl-optimization/64616
    * loop-invariant.c (can_move_invariant_reg): New.
    (move_invariant_reg): Call above new function to decide whether
    instruction can just be moved, skipping creation of temporary
    register.

    gcc/testsuite/
    PR rtl-optimization/64616
    * gcc.dg/loop-8.c: New test.
    * gcc.dg/loop-9.c: New test.

From-SVN: r223113